org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/tmf/ui/views/uml2sd/SDWidget.java

   1 /**********************************************************************
   2  * Copyright (c) 2005, 2013 IBM Corporation, Ericsson
   3  * All rights reserved.   This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM - Initial API and implementation
  10  *     Bernd Hufmann - Updated for TMF
  11  **********************************************************************/
  12
  13 package org.eclipse.tracecompass.tmf.ui.views.uml2sd;
  14
  15 import java.text.MessageFormat;
  16 import java.util.ArrayList;
  17 import java.util.List;
  18 import java.util.Timer;
  19 import java.util.TimerTask;
  20
  21 import org.eclipse.jface.contexts.IContextIds;
  22 import org.eclipse.jface.util.IPropertyChangeListener;
  23 import org.eclipse.jface.util.PropertyChangeEvent;
  24 import org.eclipse.jface.viewers.ISelectionProvider;
  25 import org.eclipse.jface.viewers.StructuredSelection;
  26 import org.eclipse.swt.SWT;
  27 import org.eclipse.swt.accessibility.ACC;
  28 import org.eclipse.swt.accessibility.Accessible;
  29 import org.eclipse.swt.accessibility.AccessibleAdapter;
  30 import org.eclipse.swt.accessibility.AccessibleControlAdapter;
  31 import org.eclipse.swt.accessibility.AccessibleControlEvent;
  32 import org.eclipse.swt.accessibility.AccessibleEvent;
  33 import org.eclipse.swt.events.DisposeEvent;
  34 import org.eclipse.swt.events.DisposeListener;
  35 import org.eclipse.swt.events.FocusEvent;
  36 import org.eclipse.swt.events.FocusListener;
  37 import org.eclipse.swt.events.KeyEvent;
  38 import org.eclipse.swt.events.MouseEvent;
  39 import org.eclipse.swt.events.SelectionEvent;
  40 import org.eclipse.swt.events.SelectionListener;
  41 import org.eclipse.swt.events.TraverseEvent;
  42 import org.eclipse.swt.events.TraverseListener;
  43 import org.eclipse.swt.graphics.GC;
  44 import org.eclipse.swt.graphics.Image;
  45 import org.eclipse.swt.graphics.ImageData;
  46 import org.eclipse.swt.graphics.Rectangle;
  47 import org.eclipse.swt.printing.Printer;
  48 import org.eclipse.swt.printing.PrinterData;
  49 import org.eclipse.swt.widgets.Canvas;
  50 import org.eclipse.swt.widgets.Caret;
  51 import org.eclipse.swt.widgets.Composite;
  52 import org.eclipse.swt.widgets.Control;
  53 import org.eclipse.swt.widgets.Display;
  54 import org.eclipse.swt.widgets.Event;
  55 import org.eclipse.swt.widgets.Listener;
  56 import org.eclipse.swt.widgets.MenuItem;
  57 import org.eclipse.tracecompass.internal.tmf.ui.Activator;
  58 import org.eclipse.tracecompass.internal.tmf.ui.ITmfImageConstants;
  59 import org.eclipse.tracecompass.tmf.core.timestamp.ITmfTimestamp;
  60 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.BaseMessage;
  61 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.BasicExecutionOccurrence;
  62 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.Frame;
  63 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.GraphNode;
  64 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.ITimeRange;
  65 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.Lifeline;
  66 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.core.Metrics;
  67 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.dialogs.SDPrintDialog;
  68 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.dialogs.SDPrintDialogUI;
  69 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.drawings.IColor;
  70 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.handlers.provider.ISDCollapseProvider;
  71 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.load.LoadersManager;
  72 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.preferences.ISDPreferences;
  73 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.preferences.SDViewPref;
  74 import org.eclipse.tracecompass.tmf.ui.views.uml2sd.util.Messages;
  75 import org.eclipse.ui.contexts.IContextService;
  76 import org.eclipse.ui.part.ViewPart;
  77
  78 /**
  79  * <p>
  80  * This class implements sequence diagram widget used in the sequence diagram view.
  81  * </p>
  82  *
  83  * @version 1.0
  84  * @author sveyrier
  85  */
  86 public class SDWidget extends ScrollView implements SelectionListener,
  87         IPropertyChangeListener, DisposeListener, ITimeCompressionListener {
  88
  89     // ------------------------------------------------------------------------
  90     // Attributes
  91     // ------------------------------------------------------------------------
  92
  93     /**
  94      * The frame to display in the sequence diagram widget.
  95      */
  96     private Frame fFrame;
  97     /**
  98      * The overview image to display.
  99      */
 100     private Image fOverView = null;
 101     /**
 102      * The zoom in menu item.
 103      */
 104     private MenuItem fZoomIn = null;
 105     /**
 106      * The zoom out menu item.
 107      */
 108     private MenuItem fZoomOut = null;
 109     /**
 110      * The sequence diagram selection provider.
 111      */
 112     private SDWidgetSelectionProvider fSelProvider = null;
 113     /**
 114      * The current zoom value.
 115      */
 116     private float fZoomValue = 1;
 117     /**
 118      * The current zoomInMode (true for zoom in).
 119      */
 120     private boolean fZoomInMode = false;
 121     /**
 122      * The current zoomOutMode (true for zoom out).
 123      */
 124     private boolean fZoomOutMode = false;
 125     /**
 126      * The current list of selected graph nodes.
 127      */
 128     private List<GraphNode> fSelectedNodeList = null;
 129     /**
 130      * Flag whether ctrl button is selected or not.
 131      */
 132     private boolean fCtrlSelection = false;
 133     /**
 134      * A reference to the view site.
 135      */
 136     private ViewPart fSite = null;
 137     /**
 138      * The current graph node (the last selected one).
 139      */
 140     private GraphNode fCurrentGraphNode = null;
 141     /**
 142      * The first graph node in list (multiple selection).
 143      */
 144     private GraphNode fListStart = null;
 145     /**
 146      * The previous graph node (multiple selection).
 147      */
 148     private List<GraphNode> fPrevList = null;
 149     /**
 150      * The time compression bar.
 151      */
 152     private TimeCompressionBar fTimeBar = null;
 153     /**
 154      * The current diagram tool tip.
 155      */
 156     private DiagramToolTip fToolTip = null;
 157     /**
 158      * The accessible object reference of view control.
 159      */
 160     private Accessible fAccessible = null;
 161     /**
 162      * The current node for the tooltip to display.
 163      */
 164     private GraphNode fToolTipNode;
 165     /**
 166      * The life line to drag and drop.
 167      */
 168     private Lifeline fDragAndDrop = null;
 169     /**
 170      * The number of focused widgets.
 171      */
 172     private int fFocusedWidget = -1;
 173     /**
 174      * The printer zoom.
 175      */
 176     private float fPrinterZoom = 0;
 177     /**
 178      * Y coordinate for printer.
 179      */
 180     private int fPrinterY = 0;
 181     /**
 182      * X coordinate for printer.
 183      */
 184     private int fPrinterX = 0;
 185     /**
 186      * Flag whether drag and drop is enabled or not.
 187      */
 188     private boolean fIsDragAndDrop = false;
 189     /**
 190      * The x coordinate for drag.
 191      */
 192     private int fDragX = 0;
 193     /**
 194      * The y coordinate for drag.
 195      */
 196     private int fDragY = 0;
 197     /**
 198      * The reorder mode.
 199      */
 200     private boolean fReorderMode = false;
 201     /**
 202      * The collapse caret image.
 203      */
 204     private Image fCollapaseCaretImg = null;
 205     /**
 206      * The arrow up caret image.
 207      */
 208     private Image fArrowUpCaretImg = null;
 209     /**
 210      * The current caret image.
 211      */
 212     private Image fCurrentCaretImage = null;
 213     /**
 214      * A sequence diagramm collapse provider (for collapsing graph nodes)
 215      */
 216     private ISDCollapseProvider fCollapseProvider = null;
 217     /**
 218      * The insertion caret.
 219      */
 220     private Caret fInsertionCartet = null;
 221     /**
 222      * The reorder list when in reorder mode.
 223      */
 224     private List<Lifeline[]> fReorderList = null;
 225     /**
 226      * Flag to specify whether in printing mode or not.
 227      */
 228     private boolean fIsPrinting = false;
 229     /**
 230      * A printer reference.
 231      */
 232     private Printer fPrinter = null;
 233     /**
 234      * Flag whether shift was selected or not.
 235      */
 236     private boolean fShiftSelection = false;
 237     /**
 238      * The scroll tooltip.
 239      */
 240     private DiagramToolTip fScrollToolTip = null;
 241     /**
 242      * Timer for auto_scroll feature
 243      */
 244     private AutoScroll fLocalAutoScroll = null;
 245     /**
 246      * TimerTask for auto_scroll feature !=null when auto scroll is running
 247      */
 248     private Timer fLocalAutoScrollTimer = null;
 249
 250     // ------------------------------------------------------------------------
 251     // Constructor
 252     // ------------------------------------------------------------------------
 253     /**
 254      * Constructor for SDWidget.
 255      * @param c The parent composite
 256      * @param s The style
 257      */
 258     public SDWidget(Composite c, int s) {
 259         super(c, s | SWT.NO_BACKGROUND, true);
 260         setOverviewEnabled(true);
 261         fSelectedNodeList = new ArrayList<>();
 262         fSelProvider = new SDWidgetSelectionProvider();
 263         SDViewPref.getInstance().addPropertyChangeListener(this);
 264         fToolTip = new DiagramToolTip(getViewControl());
 265         super.addDisposeListener(this);
 266
 267         fScrollToolTip = new DiagramToolTip(c);
 268         getVerticalBar().addListener(SWT.MouseUp, new Listener() {
 269
 270             @Override
 271             public void handleEvent(Event event) {
 272                 fScrollToolTip.hideToolTip();
 273             }
 274
 275         });
 276         fAccessible = getViewControl().getAccessible();
 277
 278         fAccessible.addAccessibleListener(new AccessibleAdapter() {
 279             @Override
 280             public void getName(AccessibleEvent e) {
 281                 // Case toolTip
 282                 if (e.childID == 0) {
 283                     if (fToolTipNode != null) {
 284                         if (fToolTipNode instanceof Lifeline) {
 285                             Lifeline lifeline = (Lifeline) fToolTipNode;
 286                             e.result = lifeline.getToolTipText();
 287                         } else {
 288                             e.result = fToolTipNode.getName() + getPostfixForTooltip(true);
 289                         }
 290                     }
 291                 } else {
 292                     if (getFocusNode() != null) {
 293                         if (getFocusNode() instanceof Lifeline) {
 294                             e.result = MessageFormat.format(Messages.SequenceDiagram_LifelineNode, new Object[] { String.valueOf(getFocusNode().getName()) });
 295                         }
 296                         if (getFocusNode() instanceof BaseMessage) {
 297                             BaseMessage mes = (BaseMessage) getFocusNode();
 298                             if ((mes.getStartLifeline() != null) && (mes.getEndLifeline() != null)) {
 299                                 e.result = MessageFormat.format(
 300                                         Messages.SequenceDiagram_MessageNode,
 301                                         new Object[] { String.valueOf(mes.getName()), String.valueOf(mes.getStartLifeline().getName()), Integer.valueOf(mes.getStartOccurrence()), String.valueOf(mes.getEndLifeline().getName()),
 302                                                 Integer.valueOf(mes.getEndOccurrence()) });
 303                             } else if ((mes.getStartLifeline() == null) && (mes.getEndLifeline() != null)) {
 304                                 e.result = MessageFormat.format(Messages.SequenceDiagram_FoundMessageNode, new Object[] { String.valueOf(mes.getName()), String.valueOf(mes.getEndLifeline().getName()), Integer.valueOf(mes.getEndOccurrence()) });
 305                             } else if ((mes.getStartLifeline() != null) && (mes.getEndLifeline() == null)) {
 306                                 e.result = MessageFormat.format(Messages.SequenceDiagram_LostMessageNode, new Object[] { String.valueOf(mes.getName()), String.valueOf(mes.getStartLifeline().getName()), Integer.valueOf(mes.getStartOccurrence()) });
 307                             }
 308                         } else if (getFocusNode() instanceof BasicExecutionOccurrence) {
 309                             BasicExecutionOccurrence exec = (BasicExecutionOccurrence) getFocusNode();
 310                             e.result = MessageFormat.format(Messages.SequenceDiagram_ExecutionOccurrenceWithParams,
 311                                     new Object[] { String.valueOf(exec.getName()), String.valueOf(exec.getLifeline().getName()), Integer.valueOf(exec.getStartOccurrence()), Integer.valueOf(exec.getEndOccurrence()) });
 312                         }
 313
 314                     }
 315                 }
 316             }
 317         });
 318
 319         fAccessible.addAccessibleControlListener(new AccessibleControlAdapter() {
 320             @Override
 321             public void getFocus(AccessibleControlEvent e) {
 322                 if (fFocusedWidget == -1) {
 323                     e.childID = ACC.CHILDID_SELF;
 324                 } else {
 325                     e.childID = fFocusedWidget;
 326                 }
 327             }
 328
 329             @Override
 330             public void getRole(AccessibleControlEvent e) {
 331                 switch (e.childID) {
 332                 case ACC.CHILDID_SELF:
 333                     e.detail = ACC.ROLE_CLIENT_AREA;
 334                     break;
 335                 case 0:
 336                     e.detail = ACC.ROLE_TOOLTIP;
 337                     break;
 338                 case 1:
 339                     e.detail = ACC.ROLE_LABEL;
 340                     break;
 341                 default:
 342                     break;
 343                 }
 344             }
 345
 346             @Override
 347             public void getState(AccessibleControlEvent e) {
 348                 e.detail = ACC.STATE_FOCUSABLE;
 349                 if (e.childID == ACC.CHILDID_SELF) {
 350                     e.detail |= ACC.STATE_FOCUSED;
 351                 } else {
 352                     e.detail |= ACC.STATE_SELECTABLE;
 353                     if (e.childID == fFocusedWidget) {
 354                         e.detail |= ACC.STATE_FOCUSED | ACC.STATE_SELECTED | ACC.STATE_CHECKED;
 355                     }
 356                 }
 357             }
 358         });
 359
 360         fInsertionCartet = new Caret((Canvas) getViewControl(), SWT.NONE);
 361         fInsertionCartet.setVisible(false);
 362
 363         fCollapaseCaretImg = Activator.getDefault().getImageFromPath(ITmfImageConstants.IMG_UI_ARROW_COLLAPSE_OBJ);
 364         fArrowUpCaretImg = Activator.getDefault().getImageFromPath(ITmfImageConstants.IMG_UI_ARROW_UP_OBJ);
 365
 366         fReorderList = new ArrayList<>();
 367         getViewControl().addTraverseListener(new LocalTraverseListener());
 368
 369         addTraverseListener(new LocalTraverseListener());
 370
 371         getViewControl().addFocusListener(new FocusListener() {
 372
 373             @Override
 374             public void focusGained(FocusEvent e) {
 375                 SDViewPref.getInstance().setNoFocusSelection(false);
 376                 fCtrlSelection = false;
 377                 fShiftSelection = false;
 378                 redraw();
 379             }
 380
 381             @Override
 382             public void focusLost(FocusEvent e) {
 383                 SDViewPref.getInstance().setNoFocusSelection(true);
 384                 redraw();
 385             }
 386         });
 387     }
 388
 389     // ------------------------------------------------------------------------
 390     // Operations
 391     // ------------------------------------------------------------------------
 392
 393     /**
 394      * Sets the time compression bar.
 395      *
 396      * @param bar The time compression bar to set
 397      */
 398     public void setTimeBar(TimeCompressionBar bar) {
 399         if (bar != null) {
 400             fTimeBar = bar;
 401             fTimeBar.addTimeCompressionListener(this);
 402         }
 403     }
 404
 405     /**
 406      * Resize the contents to insure the frame fit into the view
 407      *
 408      * @param frame the frame which will be drawn in the view
 409      */
 410     public void resizeContents(Frame frame) {
 411         int width = Math.round((frame.getWidth() + 2 * Metrics.FRAME_H_MARGIN) * fZoomValue);
 412         int height = Math.round((frame.getHeight() + 2 * Metrics.FRAME_V_MARGIN) * fZoomValue);
 413         resizeContents(width, height);
 414     }
 415
 416     /**
 417      * The frame to render (the sequence diagram)
 418      *
 419      * @param theFrame the frame to display
 420      * @param resetPosition boolean
 421      */
 422     public void setFrame(Frame theFrame, boolean resetPosition) {
 423         fReorderList.clear();
 424         fSelectedNodeList.clear();
 425         fSelProvider.setSelection(new StructuredSelection());
 426         fFrame = theFrame;
 427         if (resetPosition) {
 428             setContentsPos(0, 0);
 429             resizeContents(fFrame);
 430             redraw();
 431         }
 432         // prepare the old overview to be reused
 433         if (fOverView != null) {
 434             fOverView.dispose();
 435         }
 436         fOverView = null;
 437         resizeContents(fFrame);
 438     }
 439
 440     /**
 441      * Returns the current Frame (the sequence diagram container)
 442      *
 443      * @return the frame
 444      */
 445     public Frame getFrame() {
 446         return fFrame;
 447     }
 448
 449     /**
 450      * Returns the selection provider for the current sequence diagram
 451      *
 452      * @return the selection provider
 453      */
 454     public ISelectionProvider getSelectionProvider() {
 455         return fSelProvider;
 456     }
 457
 458     /**
 459      * Returns a list of selected graph nodes.
 460      *
 461      * @return a list of selected graph nodes.
 462      */
 463     public List<GraphNode> getSelection() {
 464         return fSelectedNodeList;
 465     }
 466
 467     /**
 468      * Adds a graph node to the selected nodes list.
 469      *
 470      * @param node A graph node
 471      */
 472     public void addSelection(GraphNode node) {
 473         if (node == null) {
 474             return;
 475         }
 476         fSelectedNodeList.add(node);
 477         node.setSelected(true);
 478         fCurrentGraphNode = node;
 479         StructuredSelection selection = new StructuredSelection(fSelectedNodeList);
 480         fSelProvider.setSelection(selection);
 481     }
 482
 483     /**
 484      * Adds a list of node to the selected nodes list.
 485      *
 486      * @param list of graph nodes
 487      */
 488     public void addSelection(List<GraphNode> list) {
 489         for (int i = 0; i < list.size(); i++) {
 490             if (!fSelectedNodeList.contains(list.get(i))) {
 491                 fSelectedNodeList.add(list.get(i));
 492                 list.get(i).setSelected(true);
 493             }
 494         }
 495         StructuredSelection selection = new StructuredSelection(fSelectedNodeList);
 496         fSelProvider.setSelection(selection);
 497     }
 498
 499     /**
 500      * Removes a node from the selected nodes list.
 501      *
 502      * @param node to remove
 503      */
 504     public void removeSelection(GraphNode node) {
 505         fSelectedNodeList.remove(node);
 506         node.setSelected(false);
 507         node.setFocused(false);
 508         StructuredSelection selection = new StructuredSelection(fSelectedNodeList);
 509         fSelProvider.setSelection(selection);
 510     }
 511
 512     /**
 513      * Removes a list of graph nodes from the selected nodes list.
 514      *
 515      * @param list of nodes to remove.
 516      */
 517     public void removeSelection(List<GraphNode> list) {
 518         fSelectedNodeList.removeAll(list);
 519         for (int i = 0; i < list.size(); i++) {
 520             list.get(i).setSelected(false);
 521             list.get(i).setFocused(false);
 522         }
 523         StructuredSelection selection = new StructuredSelection(fSelectedNodeList);
 524         fSelProvider.setSelection(selection);
 525     }
 526
 527     /**
 528      * Clear the list of GraphNodes which must be drawn selected.
 529      */
 530     public void clearSelection() {
 531         for (int i = 0; i < fSelectedNodeList.size(); i++) {
 532             fSelectedNodeList.get(i).setSelected(false);
 533             fSelectedNodeList.get(i).setFocused(false);
 534         }
 535         fCurrentGraphNode = null;
 536         fSelectedNodeList.clear();
 537         fSelProvider.setSelection(new StructuredSelection());
 538     }
 539
 540     /**
 541      * Sets view part.
 542      *
 543      * @param viewSite The view part to set
 544      */
 545     public void setSite(ViewPart viewSite) {
 546         fSite = viewSite;
 547         fSite.getSite().setSelectionProvider(fSelProvider);
 548         IContextService service = (IContextService) fSite.getSite().getWorkbenchWindow().getService(IContextService.class);
 549         service.activateContext("org.eclipse.linuxtools.tmf.ui.view.uml2sd.context"); //$NON-NLS-1$
 550         service.activateContext(IContextIds.CONTEXT_ID_WINDOW);
 551     }
 552
 553     /**
 554      * Returns the GraphNode overView the mouse if any
 555      *
 556      * @return the current graph node
 557      * */
 558     public GraphNode getMouseOverNode() {
 559         return fCurrentGraphNode;
 560     }
 561
 562     /**
 563      * Sets the zoom in mode.
 564      *
 565      * @param value
 566      *            The mode value to set.
 567      */
 568     public void setZoomInMode(boolean value) {
 569         if (value) {
 570             setZoomOutMode(false);
 571         }
 572         fZoomInMode = value;
 573     }
 574
 575     /**
 576      * Sets the zoom out mode.
 577      *
 578      * @param value
 579      *          The mode value to set.
 580      */
 581     public void setZoomOutMode(boolean value) {
 582         if (value) {
 583             setZoomInMode(false);
 584         }
 585         fZoomOutMode = value;
 586     }
 587
 588     /**
 589      * Sets the current zoom value.
 590      *
 591      * @param zoomValue
 592      *          The current zoom value
 593      * @since 2.0
 594      */
 595     public void setZoomValue(float zoomValue) {
 596         fZoomValue = zoomValue;
 597     }
 598
 599     /**
 600      * Moves the Sequence diagram to ensure the given node is visible and draw it selected
 601      *
 602      * @param node the GraphNode to move to
 603      */
 604     public void moveTo(GraphNode node) {
 605         if (node == null) {
 606             return;
 607         }
 608         clearSelection();
 609         addSelection(node);
 610         ensureVisible(node);
 611     }
 612
 613     /**
 614      * Moves the Sequence diagram to ensure the given node is visible
 615      *
 616      * @param node the GraphNode to move to
 617      */
 618     public void ensureVisible(GraphNode node) {
 619         if (node == null) {
 620             return;
 621         }
 622         int x = Math.round(node.getX() * fZoomValue);
 623         int y = Math.round(node.getY() * fZoomValue);
 624         int width = Math.round(node.getWidth() * fZoomValue);
 625         int height = Math.round(node.getHeight() * fZoomValue);
 626         if ((node instanceof BaseMessage) && (height == 0)) {
 627             int header = Metrics.LIFELINE_HEARDER_TEXT_V_MARGIN * 2 + Metrics.getLifelineHeaderFontHeigth();
 628             height = -Math.round((Metrics.getMessagesSpacing() + header) * fZoomValue);
 629             y = y + Math.round(Metrics.SYNC_INTERNAL_MESSAGE_HEIGHT * fZoomValue);
 630         }
 631         if (node instanceof BasicExecutionOccurrence) {
 632             width = 1;
 633             height = 1;
 634         }
 635         if (node instanceof Lifeline) {
 636             y = getContentsY();
 637             height = getVisibleHeight();
 638         }
 639         ensureVisible(x, y, width, height, SWT.CENTER, true);
 640         redraw();
 641     }
 642
 643     /**
 644      * Returns the current zoom factor.
 645      * @return the current zoom factor.
 646      */
 647     public float getZoomFactor() {
 648         return fZoomValue;
 649     }
 650
 651     /**
 652      * Returns teh printer reference.
 653      *
 654      * @return the printer reference
 655      */
 656     public Printer getPrinter() {
 657         return fPrinter;
 658     }
 659
 660     /**
 661      * Returns whether the widget is used for printing or not.
 662      *
 663      * @return whether the widget is used for printing or not
 664      */
 665     public boolean isPrinting() {
 666         return fIsPrinting;
 667     }
 668
 669     /**
 670      * Returns the current graph node.
 671      *
 672      * @return the current graph node
 673      * @since 2.0
 674      */
 675     public GraphNode getCurrentGraphNode() {
 676         return fCurrentGraphNode;
 677     }
 678
 679     /**
 680      * Returns the current zoom value.
 681      *
 682      * @return the current zoom value
 683      * @since 2.0
 684      */
 685     public float getZoomValue() {
 686         return fZoomValue;
 687     }
 688
 689     /**
 690      * Gets the zoom in mode.
 691      *
 692      * @return the mode value to set.
 693      * @since 2.0
 694      */
 695     public boolean getZoomInMode() {
 696         return fZoomInMode;
 697     }
 698
 699
 700     /**
 701      * Gets the zoom out mode.
 702      *
 703      * @return the mode value to set.
 704      * @since 2.0
 705      */
 706     public boolean getZoomOutMode() {
 707         return fZoomOutMode;
 708     }
 709
 710     /**
 711      * Returns if ctrl selection
 712      * @return true if ctrl selection else false
 713      * @since 2.0
 714      */
 715     public boolean isCtrlSelection() {
 716         return fCtrlSelection;
 717     }
 718
 719     /**
 720      * Returns if shift selection
 721      * @return true if shift Selection else false
 722      * @since 2.0
 723      */
 724     public boolean isShiftSelection() {
 725         return fCtrlSelection;
 726     }
 727
 728     /**
 729      * Gets the overview image.
 730      *
 731      * @param rect Rectangle to include overview.
 732      * @return the overview image
 733      */
 734     public Image getOverview(Rectangle rect) {
 735         float oldzoom = fZoomValue;
 736         if ((fOverView != null) && ((rect.width != fOverView.getBounds().width) || (rect.height != fOverView.getBounds().height))) {
 737             fOverView.dispose();
 738             fOverView = null;
 739         }
 740         if (fOverView == null) {
 741             int backX = getContentsX();
 742             int backY = getContentsY();
 743             setContentsPos(0, 0);
 744             fOverView = new Image(getDisplay(), rect.width, rect.height);
 745             GC gcim = new GC(fOverView);
 746             NGC context = new NGC(this, gcim);
 747             context.setBackground(SDViewPref.getInstance().getBackGroundColor(ISDPreferences.PREF_FRAME));
 748             fFrame.draw(context);
 749             setContentsPos(backX, backY);
 750             gcim.dispose();
 751             context.dispose();
 752         }
 753         fZoomValue = oldzoom;
 754         return fOverView;
 755     }
 756
 757     /**
 758      * Resets the zoom factor.
 759      */
 760     public void resetZoomFactor() {
 761         int currentX = Math.round(getContentsX() / fZoomValue);
 762         int currentY = Math.round(getContentsY() / fZoomValue);
 763         fZoomValue = 1;
 764         if (fTimeBar != null && !fTimeBar.isDisposed()) {
 765             fTimeBar.setZoom(fZoomValue);
 766         }
 767         redraw();
 768         update();
 769         setContentsPos(currentX, currentY);
 770     }
 771
 772     /**
 773      * Enable or disable the lifeline reodering using Drag and Drop
 774      *
 775      * @param mode - true to enable false otherwise
 776      */
 777     public void setReorderMode(boolean mode) {
 778         fReorderMode = mode;
 779     }
 780
 781     /**
 782      * Return the lifelines reorder sequence (using Drag and Drop) if the the reorder mode is turn on. Each ArryList
 783      * element is of type Lifeline[2] with Lifeline[0] inserted before Lifeline[1] in the diagram
 784      *
 785      * @return - the re-odered sequence
 786      */
 787     public List<Lifeline[]> getLifelineReoderList() {
 788         return fReorderList;
 789     }
 790
 791     /**
 792      * Sets the focus on given graph node (current node).
 793      *
 794      * @param node
 795      *            The graph node to focus on.
 796      */
 797     public void setFocus(GraphNode node) {
 798         if (node == null) {
 799             return;
 800         }
 801         if (fCurrentGraphNode != null) {
 802             fCurrentGraphNode.setFocused(false);
 803         }
 804         fCurrentGraphNode = node;
 805         node.setFocused(true);
 806         ensureVisible(node);
 807         setFocus(0);
 808     }
 809
 810     /**
 811      * Returns the graph node focused on.
 812      *
 813      * @return the current graph node
 814      */
 815     public GraphNode getFocusNode() {
 816         return fCurrentGraphNode;
 817     }
 818
 819     /**
 820      * Method to traverse right.
 821      */
 822     public void traverseRight() {
 823         Object selectedNode = getFocusNode();
 824         if (selectedNode == null) {
 825             traverseLeft();
 826         }
 827         GraphNode node = null;
 828         if ((selectedNode instanceof BaseMessage) && (((BaseMessage) selectedNode).getEndLifeline() != null)) {
 829             node = fFrame.getCalledMessage((BaseMessage) selectedNode);
 830         }
 831         if (selectedNode instanceof BasicExecutionOccurrence) {
 832             selectedNode = ((BasicExecutionOccurrence) selectedNode).getLifeline();
 833         }
 834         if ((node == null) && (selectedNode instanceof Lifeline)) {
 835             for (int i = 0; i < fFrame.lifeLinesCount(); i++) {
 836                 if ((selectedNode == fFrame.getLifeline(i)) && (i < fFrame.lifeLinesCount() - 1)) {
 837                     node = fFrame.getLifeline(i + 1);
 838                     break;
 839                 }
 840             }
 841         }
 842         if (node != null) {
 843             setFocus(node);
 844             redraw();
 845         }
 846     }
 847
 848     /**
 849      * Method to traverse left.
 850      */
 851     public void traverseLeft() {
 852         Object selectedNode = getFocusNode();
 853         GraphNode node = null;
 854         if ((selectedNode instanceof BaseMessage) && (((BaseMessage) selectedNode).getStartLifeline() != null)) {
 855             node = fFrame.getCallerMessage((BaseMessage) selectedNode);
 856         }
 857         if (selectedNode instanceof BasicExecutionOccurrence) {
 858             selectedNode = ((BasicExecutionOccurrence) selectedNode).getLifeline();
 859         }
 860         if (node == null) {
 861             if ((selectedNode instanceof BaseMessage) && (((BaseMessage) selectedNode).getEndLifeline() != null)) {
 862                 selectedNode = ((BaseMessage) selectedNode).getEndLifeline();
 863             }
 864             for (int i = 0; i < fFrame.lifeLinesCount(); i++) {
 865                 if ((selectedNode == fFrame.getLifeline(i)) && (i > 0)) {
 866                     node = fFrame.getLifeline(i - 1);
 867                     break;
 868                 }
 869             }
 870             if ((fFrame.lifeLinesCount() > 0) && (node == null)) {
 871                 node = fFrame.getLifeline(0);
 872             }
 873         }
 874         if (node != null) {
 875             setFocus(node);
 876             redraw();
 877         }
 878     }
 879
 880     /**
 881      * Method to traverse up.
 882      */
 883     public void traverseUp() {
 884         Object selectedNode = getFocusNode();
 885         if (selectedNode == null) {
 886             traverseLeft();
 887         }
 888         GraphNode node = null;
 889         if (selectedNode instanceof BaseMessage) {
 890             node = fFrame.getPrevLifelineMessage(((BaseMessage) selectedNode).getStartLifeline(), (BaseMessage) selectedNode);
 891         } else if (selectedNode instanceof Lifeline) {
 892             node = fFrame.getPrevLifelineMessage((Lifeline) selectedNode, null);
 893             if (!(node instanceof Lifeline)) {
 894                 node = null;
 895             }
 896         } else if (selectedNode instanceof BasicExecutionOccurrence) {
 897             node = fFrame.getPrevExecOccurrence((BasicExecutionOccurrence) selectedNode);
 898             if (node == null) {
 899                 node = ((BasicExecutionOccurrence) selectedNode).getLifeline();
 900             }
 901         }
 902         if ((node == null) && (selectedNode instanceof BaseMessage) && (((BaseMessage) selectedNode).getStartLifeline() != null)) {
 903             node = ((BaseMessage) selectedNode).getStartLifeline();
 904         }
 905
 906         if (node != null) {
 907             setFocus(node);
 908             redraw();
 909         }
 910     }
 911
 912     /**
 913      * Method to traverse down.
 914      */
 915     public void traverseDown() {
 916         Object selectedNode = getFocusNode();
 917         if (selectedNode == null) {
 918             traverseLeft();
 919         }
 920         GraphNode node;
 921         if (selectedNode instanceof BaseMessage) {
 922             node = fFrame.getNextLifelineMessage(((BaseMessage) selectedNode).getStartLifeline(), (BaseMessage) selectedNode);
 923         } else if (selectedNode instanceof Lifeline) {
 924             node = fFrame.getFirstExecution((Lifeline) selectedNode);
 925         } else if (selectedNode instanceof BasicExecutionOccurrence) {
 926             node = fFrame.getNextExecOccurrence((BasicExecutionOccurrence) selectedNode);
 927         } else {
 928             return;
 929         }
 930
 931         if (node != null) {
 932             setFocus(node);
 933             redraw();
 934         }
 935     }
 936
 937     /**
 938      * Method to traverse home.
 939      */
 940     public void traverseHome() {
 941         Object selectedNode = getFocusNode();
 942         if (selectedNode == null) {
 943             traverseLeft();
 944         }
 945         GraphNode node = null;
 946
 947         if (selectedNode instanceof BaseMessage) {
 948             if (((BaseMessage) selectedNode).getStartLifeline() != null) {
 949                 node = fFrame.getNextLifelineMessage(((BaseMessage) selectedNode).getStartLifeline(), null);
 950             } else {
 951                 node = fFrame.getNextLifelineMessage(((BaseMessage) selectedNode).getEndLifeline(), null);
 952             }
 953         } else if (selectedNode instanceof Lifeline) {
 954             node = fFrame.getNextLifelineMessage((Lifeline) selectedNode, null);
 955         } else if (selectedNode instanceof BasicExecutionOccurrence) {
 956             node = fFrame.getFirstExecution(((BasicExecutionOccurrence) selectedNode).getLifeline());
 957         } else {
 958             if (fFrame.lifeLinesCount() > 0) {
 959                 Lifeline lifeline = fFrame.getLifeline(0);
 960                 node = fFrame.getNextLifelineMessage(lifeline, null);
 961             }
 962         }
 963
 964         if (node != null) {
 965             setFocus(node);
 966             redraw();
 967         }
 968     }
 969
 970     /**
 971      * Method to traverse to the end.
 972      */
 973     public void traverseEnd() {
 974         Object selectedNode = getFocusNode();
 975         if (selectedNode == null) {
 976             traverseLeft();
 977         }
 978         GraphNode node;
 979         if (selectedNode instanceof BaseMessage) {
 980             node = fFrame.getPrevLifelineMessage(((BaseMessage) selectedNode).getStartLifeline(), null);
 981         } else if (selectedNode instanceof Lifeline) {
 982             node = fFrame.getPrevLifelineMessage((Lifeline) selectedNode, null);
 983         } else if (selectedNode instanceof BasicExecutionOccurrence) {
 984             node = fFrame.getLastExecOccurrence(((BasicExecutionOccurrence) selectedNode).getLifeline());
 985         } else {
 986             if (fFrame.lifeLinesCount() > 0) {
 987                 Lifeline lifeline = fFrame.getLifeline(0);
 988                 node = fFrame.getPrevLifelineMessage(lifeline, null);
 989             } else {
 990                 return;
 991             }
 992         }
 993
 994         if (node != null) {
 995             setFocus(node);
 996             redraw();
 997         }
 998     }
 999
1000     /**
1001      * Method to print UI.
1002      *
1003      * @param sdPrintDialog the sequence diagram printer dialog.
1004      */
1005     public void printUI(SDPrintDialogUI sdPrintDialog) {
1006         PrinterData data = sdPrintDialog.getPrinterData();
1007
1008         if ((data == null) || (fFrame == null)) {
1009             return;
1010         }
1011
1012         fPrinter = new Printer(data);
1013
1014         String jobName = MessageFormat.format(Messages.SequenceDiagram_plus, new Object[] { String.valueOf(fSite.getContentDescription()), String.valueOf(fFrame.getName()) });
1015         fPrinter.startJob(jobName);
1016
1017         GC gc = new GC(fPrinter);
1018
1019         float lastZoom = fZoomValue;
1020
1021         Rectangle area = getClientArea();
1022         GC gcim = null;
1023
1024         gcim = gc;
1025         NGC context = new NGC(this, gcim);
1026
1027         // Set the metrics to use for lifeline text and message text
1028         // using the Graphical Context
1029         Metrics.setLifelineFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE)));
1030         Metrics.setLifelineFontWidth(context.getFontWidth(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE)));
1031         Metrics.setLifelineWidth(SDViewPref.getInstance().getLifelineWidth());
1032         Metrics.setFrameFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_FRAME_NAME)));
1033         Metrics.setLifelineHeaderFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE_HEADER)));
1034
1035         int syncMessFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_SYNC_MESS));
1036         int syncMessRetFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_SYNC_MESS_RET));
1037         int asyncMessFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_ASYNC_MESS));
1038         int asyncMessRetFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_ASYNC_MESS_RET));
1039
1040         int messageFontHeight = 0;
1041         if (syncMessFontH > syncMessRetFontH) {
1042             messageFontHeight = syncMessFontH;
1043         } else {
1044             messageFontHeight = syncMessRetFontH;
1045         }
1046         if (messageFontHeight < asyncMessFontH) {
1047             messageFontHeight = asyncMessFontH;
1048         }
1049         if (messageFontHeight < asyncMessRetFontH) {
1050             messageFontHeight = asyncMessRetFontH;
1051         }
1052         Metrics.setMessageFontHeight(messageFontHeight);
1053         context.setFont(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE));
1054
1055         int width = Math.round((fFrame.getWidth() + 2 * Metrics.FRAME_H_MARGIN) * fZoomValue);
1056         int height = Math.round((fFrame.getHeight() + 2 * Metrics.FRAME_V_MARGIN) * fZoomValue);
1057         if (width < area.width) {
1058             width = area.width;
1059         }
1060         if (height < area.height) {
1061             height = area.height;
1062         }
1063         resizeContents(width, height);
1064
1065         context.setBackground(SDViewPref.getInstance().getBackGroundColor(ISDPreferences.PREF_FRAME));
1066         context.fillRectangle(0, 0, getContentsWidth(), Metrics.FRAME_V_MARGIN);
1067         context.fillRectangle(0, 0, fFrame.getX(), getContentsHeight());
1068         context.fillRectangle(fFrame.getX() + fFrame.getWidth() + 1, 0, getContentsWidth() - (fFrame.getX() + fFrame.getWidth() + 1), getContentsHeight());
1069         context.fillRectangle(0, fFrame.getY() + fFrame.getHeight() + 1, getContentsWidth(), getContentsHeight() - (fFrame.getY() + fFrame.getHeight() + 1));
1070         gcim.setLineWidth(1);
1071
1072         fPrinter.startPage();
1073         fZoomValue = lastZoom;
1074
1075         int restoreX = getContentsX();
1076         int restoreY = getContentsY();
1077
1078         float zh = sdPrintDialog.getStepY() * sdPrintDialog.getZoomFactor();
1079         float zw = sdPrintDialog.getStepX() * sdPrintDialog.getZoomFactor();
1080
1081         float zoomValueH = fPrinter.getClientArea().height / zh;
1082         float zoomValueW = fPrinter.getClientArea().width / zw;
1083         if (zoomValueH > zoomValueW) {
1084             fPrinterZoom = zoomValueH;
1085         } else {
1086             fPrinterZoom = zoomValueW;
1087         }
1088
1089         if (sdPrintDialog.printSelection()) {
1090             int[] pagesList = sdPrintDialog.getPageList();
1091
1092             for (int pageIndex = 0; pageIndex < pagesList.length; pageIndex++) {
1093                 printPage(pagesList[pageIndex], sdPrintDialog, context);
1094             }
1095         } else if (sdPrintDialog.printAll()) {
1096             for (int pageIndex = 1; pageIndex <= sdPrintDialog.maxNumOfPages(); pageIndex++) {
1097                 printPage(pageIndex, sdPrintDialog, context);
1098             }
1099         } else if (sdPrintDialog.printCurrent()) {
1100             printPage(getContentsX(), getContentsY(), sdPrintDialog, context, 1);
1101         } else if (sdPrintDialog.printRange()) {
1102             for (int pageIndex = sdPrintDialog.getFrom(); pageIndex <= sdPrintDialog.maxNumOfPages() && pageIndex <= sdPrintDialog.getTo(); pageIndex++) {
1103                 printPage(pageIndex, sdPrintDialog, context);
1104             }
1105         }
1106
1107         fPrinter.endJob();
1108         fIsPrinting = false;
1109
1110         gc.dispose();
1111         context.dispose();
1112
1113         fZoomValue = lastZoom;
1114         fPrinter.dispose();
1115         setContentsPos(restoreX, restoreY);
1116     }
1117
1118     /**
1119      * Method to print.
1120      */
1121     public void print() {
1122         SDPrintDialog sdPrinter = new SDPrintDialog(this.getShell(), this);
1123         try {
1124             if (sdPrinter.open() != 0) {
1125                 return;
1126             }
1127         } catch (Exception e) {
1128             Activator.getDefault().logError("Error creating image", e); //$NON-NLS-1$
1129             return;
1130         }
1131         printUI(sdPrinter.getDialogUI());
1132     }
1133
1134     /**
1135      * Method to print a page.
1136      *
1137      * @param pageNum The page number
1138      * @param pd The sequence diagram print dialog
1139      * @param context The graphical context
1140      */
1141     public void printPage(int pageNum, SDPrintDialogUI pd, NGC context) {
1142         int j = pageNum / pd.getNbRow();
1143         int i = pageNum % pd.getNbRow();
1144         if (i != 0) {
1145             j++;
1146         } else {
1147             i = pd.getNbRow();
1148         }
1149
1150         i--;
1151         j--;
1152
1153         i = (int) (i * pd.getStepX());
1154         j = (int) (j * pd.getStepY());
1155
1156         printPage(i, j, pd, context, pageNum);
1157
1158         fPrinter.endPage();
1159     }
1160
1161     /**
1162      * Method to print page ranges.
1163      *
1164      * @param i
1165      *            The start page
1166      * @param j
1167      *            The end page
1168      * @param pd
1169      *            The sequence diagram print dialog
1170      * @param context
1171      *            The graphical context
1172      * @param pageNum
1173      *            The current page
1174      */
1175     public void printPage(int i, int j, SDPrintDialogUI pd, NGC context, int pageNum) {
1176         fIsPrinting = false;
1177         int pageNumFontZoom = fPrinter.getClientArea().height / getVisibleHeight();
1178         fPrinterX = i;
1179         fPrinterY = j;
1180         setContentsPos(i, j);
1181         update();
1182         fIsPrinting = true;
1183         float lastZoom = fZoomValue;
1184         fZoomValue = fPrinterZoom * lastZoom;
1185
1186         fFrame.draw(context);
1187
1188         fZoomValue = pageNumFontZoom;
1189         context.setFont(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE));
1190         String currentPageNum = String.valueOf(pageNum);
1191         int ii = context.textExtent(currentPageNum);
1192         int jj = context.getCurrentFontHeight();
1193         fZoomValue = fPrinterZoom * lastZoom;
1194         context.drawText(currentPageNum, Math.round(fPrinterX + getVisibleWidth() / fPrinterZoom - ii / fPrinterZoom), Math.round(fPrinterY + getVisibleHeight() / fPrinterZoom - jj / fPrinterZoom), false);
1195         fIsPrinting = false;
1196         fZoomValue = lastZoom;
1197     }
1198
1199     /**
1200      * Sets the collapse provider.
1201      *
1202      * @param provider The collapse provider to set
1203      */
1204     protected void setCollapseProvider(ISDCollapseProvider provider) {
1205         fCollapseProvider = provider;
1206     }
1207
1208
1209     /**
1210      * Checks for focus of children.
1211      *
1212      * @param children Control to check
1213      * @return true if child is on focus else false
1214      */
1215     protected boolean checkFocusOnChilds(Control children) {
1216         if (children instanceof Composite) {
1217             Control[] child = ((Composite) children).getChildren();
1218             for (int i = 0; i < child.length; i++) {
1219                 if (child[i].isFocusControl()) {
1220                     return true;
1221                 }
1222                 checkFocusOnChilds(child[i]);
1223             }
1224         }
1225         return false;
1226     }
1227
1228     /**
1229      * A post action for a tooltip (before displaying).
1230      *
1231      * @param accessible true if accessible else false
1232      * @return the tooltip text.
1233      */
1234     protected String getPostfixForTooltip(boolean accessible) {
1235         StringBuffer postfix = new StringBuffer();
1236         // Determine if the tooltip must show the time difference between the current mouse position and
1237         // the last selected graphNode
1238         if ((fCurrentGraphNode != null) &&
1239                 (fCurrentGraphNode instanceof ITimeRange) &&
1240                 (fToolTipNode instanceof ITimeRange) &&
1241                 (fCurrentGraphNode != fToolTipNode) &&
1242                 ((ITimeRange) fToolTipNode).hasTimeInfo() &&
1243                 ((ITimeRange) fCurrentGraphNode).hasTimeInfo()) {
1244             postfix.append(" -> "); //$NON-NLS-1$
1245             postfix.append(fCurrentGraphNode.getName());
1246             postfix.append("\n"); //$NON-NLS-1$
1247             postfix.append(Messages.SequenceDiagram_Delta);
1248             postfix.append(" "); //$NON-NLS-1$
1249
1250             //double delta = ((ITimeRange)toolTipNode).getLastTime()-((ITimeRange)currentGraphNode).getLastTime();
1251             ITmfTimestamp firstTime = ((ITimeRange) fCurrentGraphNode).getEndTime();
1252             ITmfTimestamp lastTime = ((ITimeRange) fToolTipNode).getEndTime();
1253             ITmfTimestamp delta =  lastTime.getDelta(firstTime);
1254             postfix.append(delta.toString());
1255
1256         } else {
1257             if ((fToolTipNode instanceof ITimeRange) && ((ITimeRange) fToolTipNode).hasTimeInfo()) {
1258                 postfix.append("\n"); //$NON-NLS-1$
1259                 ITmfTimestamp firstTime = ((ITimeRange) fToolTipNode).getStartTime();
1260                 ITmfTimestamp lastTime = ((ITimeRange) fToolTipNode).getEndTime();
1261
1262                 if (firstTime != null) {
1263                     if (lastTime != null && firstTime.compareTo(lastTime, true) != 0) {
1264                         postfix.append("start: "); //$NON-NLS-1$
1265                         postfix.append(firstTime.toString());
1266                         postfix.append("\n"); //$NON-NLS-1$
1267                         postfix.append("end: "); //$NON-NLS-1$
1268                         postfix.append(lastTime.toString());
1269                         postfix.append("\n"); //$NON-NLS-1$
1270                         } else {
1271                             postfix.append(firstTime.toString());
1272                         }
1273                     }
1274                 else if (lastTime != null) {
1275                     postfix.append(lastTime.toString());
1276                 }
1277             }
1278         }
1279         return postfix.toString();
1280     }
1281
1282     /**
1283      * Sets a new focused widget.
1284      *
1285      * @param newFocusShape A new focus shape.
1286      */
1287     protected void setFocus(int newFocusShape) {
1288         fFocusedWidget = newFocusShape;
1289         if (fFocusedWidget == -1) {
1290             getViewControl().getAccessible().setFocus(ACC.CHILDID_SELF);
1291         } else {
1292             getViewControl().getAccessible().setFocus(fFocusedWidget);
1293         }
1294     }
1295
1296     /**
1297      * Highlight the given GraphNode<br>
1298      * The GraphNode is then displayed using the system default selection color
1299      *
1300      * @param node the GraphNode to highlight
1301      */
1302     protected void performSelection(GraphNode node) {
1303         if ((fCtrlSelection) || (fShiftSelection)) {
1304             if (node != null) {
1305                 if (fSelectedNodeList.contains(node)) {
1306                     removeSelection(node);
1307                 } else {
1308                     addSelection(node);
1309                 }
1310             } else {
1311                 return;
1312             }
1313         } else {
1314             clearSelection();
1315             if (node != null) {
1316                 addSelection(node);
1317             }
1318         }
1319     }
1320
1321     /**
1322      * Returns a draw buffer image.
1323      *
1324      * @return a Image containing the draw buffer.
1325      */
1326     protected Image getDrawBuffer() {
1327
1328         update();
1329         Rectangle area = getClientArea();
1330         Image dbuffer = new Image(getDisplay(), area.width, area.height);
1331         GC gcim = new GC(dbuffer);
1332         NGC context = new NGC(this, gcim);
1333
1334         // Set the metrics to use for lifeline text and message text
1335         // using the Graphical Context
1336         Metrics.setLifelineFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE)));
1337         Metrics.setLifelineFontWidth(context.getFontWidth(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE)));
1338         Metrics.setLifelineWidth(SDViewPref.getInstance().getLifelineWidth());
1339         Metrics.setFrameFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_FRAME_NAME)));
1340         Metrics.setLifelineHeaderFontHeight(context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE_HEADER)));
1341
1342         int syncMessFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_SYNC_MESS));
1343         int syncMessRetFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_SYNC_MESS_RET));
1344         int asyncMessFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_ASYNC_MESS));
1345         int asyncMessRetFontH = context.getFontHeight(SDViewPref.getInstance().getFont(ISDPreferences.PREF_ASYNC_MESS_RET));
1346
1347         int messageFontHeight = 0;
1348         if (syncMessFontH > syncMessRetFontH) {
1349             messageFontHeight = syncMessFontH;
1350         } else {
1351             messageFontHeight = syncMessRetFontH;
1352         }
1353         if (messageFontHeight < asyncMessFontH) {
1354             messageFontHeight = asyncMessFontH;
1355         }
1356         if (messageFontHeight < asyncMessRetFontH) {
1357             messageFontHeight = asyncMessRetFontH;
1358         }
1359         Metrics.setMessageFontHeight(messageFontHeight);
1360         context.setFont(SDViewPref.getInstance().getFont(ISDPreferences.PREF_LIFELINE));
1361
1362         int width = (int) ((fFrame.getWidth() + 2 * Metrics.FRAME_H_MARGIN) * fZoomValue);
1363         int height = (int) ((fFrame.getHeight() + 2 * Metrics.FRAME_V_MARGIN) * fZoomValue);
1364
1365         resizeContents(width, height);
1366
1367         context.setBackground(SDViewPref.getInstance().getBackGroundColor(ISDPreferences.PREF_FRAME));
1368         context.fillRectangle(0, 0, getContentsWidth(), Metrics.FRAME_V_MARGIN);
1369         context.fillRectangle(0, 0, fFrame.getX(), getContentsHeight());
1370         context.fillRectangle(fFrame.getX() + fFrame.getWidth() + 1, 0, getContentsWidth() - (fFrame.getX() + fFrame.getWidth() + 1), getContentsHeight());
1371         context.fillRectangle(0, fFrame.getY() + fFrame.getHeight() + 1, getContentsWidth(), getContentsHeight() - (fFrame.getY() + fFrame.getHeight() + 1));
1372         gcim.setLineWidth(1);
1373
1374         fFrame.draw(context);
1375         if (fDragAndDrop != null) {
1376             Lifeline node = fDragAndDrop;
1377             boolean isSelected = fDragAndDrop.isSelected();
1378             boolean hasFocus = fDragAndDrop.hasFocus();
1379             node.setSelected(false);
1380             node.setFocused(false);
1381             node.draw(context, fDragX, fDragY);
1382             node.setSelected(isSelected);
1383             node.setFocused(hasFocus);
1384         }
1385         gcim.dispose();
1386         context.dispose();
1387         return dbuffer;
1388     }
1389
1390     @Override
1391     protected void keyPressedEvent(KeyEvent event) {
1392         if (!(isFocusControl() || getViewControl().isFocusControl())) {
1393             Control[] child = getParent().getChildren();
1394             for (int i = 0; i < child.length; i++) {
1395                 if ((child[i].isFocusControl())&& (!(child[i] instanceof ScrollView))) {
1396                     getViewControl().setFocus();
1397                     break;
1398                 }
1399             }
1400         }
1401         setFocus(-1);
1402
1403         if (event.keyCode == SWT.CTRL) {
1404             fCtrlSelection = true;
1405         }
1406         if (event.keyCode == SWT.SHIFT) {
1407             fShiftSelection = true;
1408             fPrevList = new ArrayList<>();
1409             fPrevList.addAll(getSelection());
1410         }
1411
1412         GraphNode prevNode = getFocusNode();
1413
1414         if (event.keyCode == SWT.ARROW_RIGHT) {
1415             traverseRight();
1416         }
1417
1418         if (event.keyCode == SWT.ARROW_LEFT) {
1419             traverseLeft();
1420         }
1421
1422         if (event.keyCode == SWT.ARROW_DOWN) {
1423             traverseDown();
1424         }
1425
1426         if (event.keyCode == SWT.ARROW_UP) {
1427             traverseUp();
1428         }
1429
1430         if (event.keyCode == SWT.HOME) {
1431             traverseHome();
1432         }
1433
1434         if (event.keyCode == SWT.END) {
1435             traverseEnd();
1436         }
1437
1438         if ((!fShiftSelection) && (!fCtrlSelection)) {
1439             fListStart = fCurrentGraphNode;
1440         }
1441
1442         if (event.character == ' ') {
1443             performSelection(fCurrentGraphNode);
1444             if (!fShiftSelection) {
1445                 fListStart = fCurrentGraphNode;
1446             }
1447         }
1448
1449         if ((fShiftSelection) && (prevNode != getFocusNode())) {
1450             clearSelection();
1451             addSelection(fPrevList);
1452             addSelection(fFrame.getNodeList(fListStart, getFocusNode()));
1453             if (getFocusNode() instanceof Lifeline) {
1454                 ensureVisible(getFocusNode().getX(), getFocusNode().getY(), getFocusNode().getWidth(), getFocusNode().getHeight(), SWT.CENTER | SWT.VERTICAL, true);
1455             } else {
1456                 ensureVisible(getFocusNode());
1457             }
1458         } else if ((!fCtrlSelection) && (!fShiftSelection)) {
1459
1460             clearSelection();
1461             if (getFocusNode() != null) {
1462                 addSelection(getFocusNode());
1463
1464                 if (getFocusNode() instanceof Lifeline) {
1465                     ensureVisible(getFocusNode().getX(), getFocusNode().getY(), getFocusNode().getWidth(), getFocusNode().getHeight(), SWT.CENTER | SWT.VERTICAL, true);
1466                 } else {
1467                     ensureVisible(getFocusNode());
1468                 }
1469             }
1470         }
1471
1472         if (fCurrentGraphNode != null) {
1473             fCurrentGraphNode.setFocused(true);
1474         }
1475         redraw();
1476
1477         if ((event.character == ' ') && ((fZoomInMode) || (fZoomOutMode))) {
1478             int cx = Math.round((getContentsX() + getVisibleWidth() / 2) / fZoomValue);
1479             int cy = Math.round((getContentsY() + getVisibleHeight() / 2) / fZoomValue);
1480             if (fZoomInMode) {
1481                 if (fZoomValue < 64) {
1482                     fZoomValue = fZoomValue * (float) 1.25;
1483                 }
1484             } else {
1485                 fZoomValue = fZoomValue / (float) 1.25;
1486             }
1487             int x = Math.round(cx * fZoomValue - getVisibleWidth() / (float) 2);
1488             int y = Math.round(cy * fZoomValue - getVisibleHeight() / (float) 2);
1489             setContentsPos(x, y);
1490             if (fTimeBar != null) {
1491                 fTimeBar.setZoom(fZoomValue);
1492             }
1493             // redraw also resize the scrollView content
1494             redraw();
1495         }
1496     }
1497
1498     @Override
1499     protected void keyReleasedEvent(KeyEvent event) {
1500         setFocus(-1);
1501         if (event.keyCode == SWT.CTRL) {
1502             fCtrlSelection = false;
1503         }
1504         if (event.keyCode == SWT.SHIFT) {
1505             fShiftSelection = false;
1506         }
1507         super.keyReleasedEvent(event);
1508         setFocus(1);
1509     }
1510
1511     @Override
1512     public boolean isFocusControl() {
1513         Control[] child = getChildren();
1514         for (int i = 0; i < child.length; i++) {
1515             if (child[i].isFocusControl()) {
1516                 return true;
1517             }
1518             checkFocusOnChilds(child[i]);
1519         }
1520         return false;
1521     }
1522
1523     @Override
1524     public boolean setContentsPos(int x, int y) {
1525         int localX = x;
1526         int localY = y;
1527
1528         if (localX < 0) {
1529             localX = 0;
1530         }
1531         if (localY < 0) {
1532             localY = 0;
1533         }
1534         if (fFrame == null) {
1535             return false;
1536         }
1537         if (localX + getVisibleWidth() > getContentsWidth()) {
1538             localX = getContentsWidth() - getVisibleWidth();
1539         }
1540         if (localY + getVisibleHeight() > getContentsHeight()) {
1541             localY = getContentsHeight() - getVisibleHeight();
1542         }
1543         int x1 = Math.round(localX / fZoomValue);
1544         int y2 = Math.round(localY / fZoomValue);
1545         int width = Math.round(getVisibleWidth() / fZoomValue);
1546         int height = Math.round(getVisibleHeight() / fZoomValue);
1547         fFrame.updateIndex(x1, y2, width, height);
1548
1549         if (fInsertionCartet != null && fInsertionCartet.isVisible()) {
1550             fInsertionCartet.setVisible(false);
1551         }
1552
1553         return super.setContentsPos(localX, localY);
1554     }
1555
1556     @Override
1557     protected void contentsMouseHover(MouseEvent event) {
1558         GraphNode graphNode = null;
1559         if (fFrame != null) {
1560             int x = Math.round(event.x / fZoomValue);
1561             int y = Math.round(event.y / fZoomValue);
1562             graphNode = fFrame.getNodeAt(x, y);
1563             if ((graphNode != null) && (SDViewPref.getInstance().tooltipEnabled())) {
1564                 fToolTipNode = graphNode;
1565                 String postfix = getPostfixForTooltip(true);
1566                 if (graphNode instanceof Lifeline) {
1567                     Lifeline lifeline = (Lifeline) graphNode;
1568                     fToolTip.showToolTip(lifeline.getToolTipText() + postfix);
1569                     setFocus(0);
1570                 } else {
1571                     fToolTip.showToolTip(graphNode.getName() + postfix);
1572                     setFocus(0);
1573                 }
1574             } else {
1575                 fToolTip.hideToolTip();
1576             }
1577         }
1578     }
1579
1580     @Override
1581     protected void contentsMouseMoveEvent(MouseEvent e) {
1582         fScrollToolTip.hideToolTip();
1583         fToolTip.hideToolTip();
1584         if (!(isFocusControl() || getViewControl().isFocusControl())) {
1585             Control[] child = getParent().getChildren();
1586             for (int i = 0; i < child.length; i++) {
1587                 if ((child[i].isFocusControl()) && (!(child[i] instanceof ScrollView))) {
1588                     getViewControl().setFocus();
1589                     break;
1590                 }
1591             }
1592         }
1593         setFocus(-1);
1594
1595         if (((e.stateMask & SWT.BUTTON_MASK) != 0) && ((fDragAndDrop != null) || fIsDragAndDrop) && (fReorderMode || fCollapseProvider != null)) {
1596             fIsDragAndDrop = false;
1597             if (fCurrentGraphNode instanceof Lifeline) {
1598                 fDragAndDrop = (Lifeline) fCurrentGraphNode;
1599             }
1600             if (fDragAndDrop != null) {
1601                 int dx = 0;
1602                 int dy = 0;
1603                 if (e.x > getContentsX() + getVisibleWidth()) {
1604                     dx = e.x - (getContentsX() + getVisibleWidth());
1605                 } else if (e.x < getContentsX()) {
1606                     dx = -getContentsX() + e.x;
1607                 }
1608                 if (e.y > getContentsY() + getVisibleHeight()) {
1609                     dy = e.y - (getContentsY() + getVisibleHeight());
1610                 } else if (e.y < getContentsY()) {
1611                     dy = -getContentsY() + e.y;
1612                 }
1613                 fDragX = e.x;
1614                 fDragY = e.y;
1615                 if (dx != 0 || dy != 0) {
1616                     if (fLocalAutoScroll == null) {
1617                         if (fLocalAutoScrollTimer == null) {
1618                             fLocalAutoScrollTimer = new Timer(true);
1619                         }
1620                         fLocalAutoScroll = new AutoScroll(this, dx, dy);
1621                         fLocalAutoScrollTimer.schedule(fLocalAutoScroll, 0, 75);
1622                     } else {
1623                         fLocalAutoScroll.fDeltaX = dx;
1624                         fLocalAutoScroll.fDeltaY = dy;
1625                     }
1626                 } else if (fLocalAutoScroll != null) {
1627                     fLocalAutoScroll.cancel();
1628                     fLocalAutoScroll = null;
1629                 }
1630                 fDragX = Math.round(e.x / fZoomValue);
1631                 fDragY = Math.round(e.y / fZoomValue);
1632                 redraw();
1633                 Lifeline node = fFrame.getCloserLifeline(fDragX);
1634                 if ((node != null) && (node != fDragAndDrop)) {
1635                     int y = 0;
1636                     int y1 = 0;
1637                     int height = Metrics.getLifelineHeaderFontHeigth() + 2 * Metrics.LIFELINE_HEARDER_TEXT_V_MARGIN;
1638                     int hMargin = Metrics.LIFELINE_VT_MAGIN / 4;
1639                     int x = node.getX();
1640                     int width = node.getWidth();
1641                     if (fFrame.getVisibleAreaY() < node.getY() + node.getHeight() - height - hMargin) {
1642                         y = contentsToViewY(Math.round((node.getY() + node.getHeight()) * fZoomValue));
1643                     } else {
1644                         y = Math.round(height * fZoomValue);
1645                     }
1646
1647                     if (fFrame.getVisibleAreaY() < contentsToViewY(node.getY() - hMargin)) {
1648                         y1 = contentsToViewY(Math.round((node.getY() - hMargin) * fZoomValue));
1649                     } else {
1650                         y1 = Math.round(height * fZoomValue);
1651                     }
1652
1653                     int rx = Math.round(x * fZoomValue);
1654
1655                     fInsertionCartet.setVisible(true);
1656                     if ((fInsertionCartet.getImage() != null) && (!fInsertionCartet.getImage().isDisposed())) {
1657                         fInsertionCartet.getImage().dispose();
1658                     }
1659                     if (rx <= e.x && Math.round(rx + (width * fZoomValue)) >= e.x) {
1660                         if (fCollapseProvider != null) {
1661                             ImageData data = fCollapaseCaretImg.getImageData();
1662                             data = data.scaledTo(Math.round(fCollapaseCaretImg.getBounds().width * fZoomValue), Math.round(fCollapaseCaretImg.getBounds().height * fZoomValue));
1663                             fCurrentCaretImage = new Image(Display.getCurrent(), data);
1664                             fInsertionCartet.setImage(fCurrentCaretImage);
1665                             fInsertionCartet.setLocation(contentsToViewX(rx + Math.round((width / (float) 2) * fZoomValue)) - fCurrentCaretImage.getBounds().width / 2, y);
1666                         }
1667                     } else if (fReorderMode) {
1668                         if (rx > e.x) {
1669                             if (node.getIndex() > 1 && fFrame.getLifeline(node.getIndex() - 2) == fDragAndDrop) {
1670                                 return;
1671                             }
1672                             ImageData data = fArrowUpCaretImg.getImageData();
1673                             data = data.scaledTo(Math.round(fArrowUpCaretImg.getBounds().width * fZoomValue), Math.round(fArrowUpCaretImg.getBounds().height * fZoomValue));
1674                             fCurrentCaretImage = new Image(Display.getCurrent(), data);
1675                             fInsertionCartet.setImage(fCurrentCaretImage);
1676                             fInsertionCartet.setLocation(contentsToViewX(Math.round((x - Metrics.LIFELINE_SPACING / 2) * fZoomValue)) - fCurrentCaretImage.getBounds().width / 2, y1);
1677                         } else {
1678                             if (node.getIndex() < fFrame.lifeLinesCount() && fFrame.getLifeline(node.getIndex()) == fDragAndDrop) {
1679                                 return;
1680                             }
1681                             ImageData data = fArrowUpCaretImg.getImageData();
1682                             data = data.scaledTo(Math.round(fArrowUpCaretImg.getBounds().width * fZoomValue), Math.round(fArrowUpCaretImg.getBounds().height * fZoomValue));
1683                             fCurrentCaretImage = new Image(Display.getCurrent(), data);
1684                             fInsertionCartet.setImage(fCurrentCaretImage);
1685                             fInsertionCartet.setLocation(contentsToViewX(Math.round((x + width + Metrics.LIFELINE_SPACING / 2) * fZoomValue)) - fCurrentCaretImage.getBounds().width / 2 + 1, y1);
1686                         }
1687                     }
1688                 } else {
1689                     fInsertionCartet.setVisible(false);
1690                 }
1691             }
1692         } else {
1693             super.contentsMouseMoveEvent(e);
1694         }
1695     }
1696
1697     @Override
1698     protected void contentsMouseUpEvent(MouseEvent event) {
1699         // Just in case the diagram highlight a time compression region
1700         // this region need to be released when clicking everywhere
1701         fInsertionCartet.setVisible(false);
1702         if (fDragAndDrop != null) {
1703             if ((fOverView != null) && (!fOverView.isDisposed())) {
1704                 fOverView.dispose();
1705             }
1706             fOverView = null;
1707             Lifeline node = fFrame.getCloserLifeline(fDragX);
1708             if (node != null) {
1709                 int rx = Math.round(node.getX() * fZoomValue);
1710                 if (rx <= event.x && Math.round(rx + (node.getWidth() * fZoomValue)) >= event.x) {
1711                     if ((fCollapseProvider != null) && (fDragAndDrop != node)) {
1712                         fCollapseProvider.collapseTwoLifelines(fDragAndDrop, node);
1713                     }
1714                 } else if (rx < event.x) {
1715                     fFrame.insertLifelineAfter(fDragAndDrop, node);
1716                     if (node.getIndex() < fFrame.lifeLinesCount()) {
1717                         Lifeline temp[] = { fDragAndDrop, fFrame.getLifeline(node.getIndex()) };
1718                         fReorderList.add(temp);
1719                     } else {
1720                         Lifeline temp[] = { fDragAndDrop, null };
1721                         fReorderList.add(temp);
1722                     }
1723                 } else {
1724                     fFrame.insertLifelineBefore(fDragAndDrop, node);
1725                     Lifeline temp[] = { fDragAndDrop, node };
1726                     fReorderList.add(temp);
1727                 }
1728             }
1729         }
1730         fDragAndDrop = null;
1731         redraw();
1732         if (fFrame == null) {
1733             return;
1734         }
1735         fFrame.resetTimeCompression();
1736
1737         // reset auto scroll if it's engaged
1738         if (fLocalAutoScroll != null) {
1739             fLocalAutoScroll.cancel();
1740             fLocalAutoScroll = null;
1741         }
1742         super.contentsMouseUpEvent(event);
1743     }
1744
1745     @Override
1746     protected void contentsMouseDownEvent(MouseEvent event) {
1747         if (fCurrentGraphNode != null) {
1748             fCurrentGraphNode.setFocused(false);
1749         }
1750
1751         // Just in case the diagram highlight a time compression region
1752         // this region need to be released when clicking everywhere
1753         if (fFrame == null) {
1754             return;
1755         }
1756
1757         fFrame.resetTimeCompression();
1758
1759         if ((event.stateMask & SWT.CTRL) != 0) {
1760             fCtrlSelection = true;
1761         } else {
1762             fCtrlSelection = false;
1763         }
1764
1765         if (((fZoomInMode) || (fZoomOutMode)) && (event.button == 1)) {
1766             int cx = Math.round(event.x / fZoomValue);
1767             int cy = Math.round(event.y / fZoomValue);
1768             if (fZoomInMode) {
1769                 if (fZoomValue < 64) {
1770                     fZoomValue = fZoomValue * (float) 1.25;
1771                 }
1772             } else {
1773                 fZoomValue = fZoomValue / (float) 1.25;
1774             }
1775             int x = Math.round(cx * fZoomValue - getVisibleWidth() / (float) 2);
1776             int y = Math.round(cy * fZoomValue - getVisibleHeight() / (float) 2);
1777             setContentsPos(x, y);
1778             if (fTimeBar != null) {
1779                 fTimeBar.setZoom(fZoomValue);
1780             }
1781             // redraw also resize the scrollView content
1782             redraw();
1783         } else {
1784             GraphNode node = null;
1785             int x = Math.round(event.x / fZoomValue);
1786             int y = Math.round(event.y / fZoomValue);
1787             node = fFrame.getNodeAt(x, y);
1788
1789             if ((event.button == 1) || ((node != null) && !node.isSelected())) {
1790                 if (!fShiftSelection) {
1791                     fListStart = node;
1792                 }
1793                 if (fShiftSelection) {
1794                     clearSelection();
1795                     addSelection(fFrame.getNodeList(fListStart, node));
1796                 } else {
1797                     performSelection(node);
1798                 }
1799                 fCurrentGraphNode = node;
1800                 if (node != null) {
1801                     node.setFocused(true);
1802                 }
1803             }
1804             redraw();
1805         }
1806         if (fDragAndDrop == null) {
1807             super.contentsMouseDownEvent(event);
1808         }
1809         fIsDragAndDrop = (event.button == 1);
1810
1811     }
1812
1813     /**
1814      * TimerTask for auto scroll feature.
1815      */
1816     protected static class AutoScroll extends TimerTask {
1817         /**
1818          * Field delta x.
1819          */
1820         public int fDeltaX;
1821         /**
1822          * Field delta y.
1823          */
1824         public int fDeltaY;
1825         /**
1826          * Field sequence diagram reference.
1827          */
1828         public SDWidget fSdWidget;
1829
1830         /**
1831          * Constructor for AutoScroll.
1832          * @param sv sequence diagram widget reference
1833          * @param dx delta x
1834          * @param dy delta y
1835          */
1836         public AutoScroll(SDWidget sv, int dx, int dy) {
1837             fSdWidget = sv;
1838             fDeltaX = dx;
1839             fDeltaY = dy;
1840         }
1841
1842         @Override
1843         public void run() {
1844             Display display = Display.getDefault();
1845             if ((display == null) || (display.isDisposed())) {
1846                 return;
1847             }
1848             display.asyncExec(new Runnable() {
1849                 @Override
1850                 public void run() {
1851                     if (fSdWidget.isDisposed()) {
1852                         return;
1853                     }
1854                     fSdWidget.fDragX += fDeltaX;
1855                     fSdWidget.fDragY += fDeltaY;
1856                     fSdWidget.scrollBy(fDeltaX, fDeltaY);
1857                 }
1858             });
1859         }
1860     }
1861
1862     @Override
1863     protected void drawContents(GC gc, int clipx, int clipy, int clipw, int cliph) {
1864         if (fFrame == null) {
1865             gc.setBackground(getDisplay().getSystemColor(SWT.COLOR_WHITE));
1866             gc.fillRectangle(0, 0, getVisibleWidth(), getVisibleHeight());
1867             gc.dispose();
1868             return;
1869         }
1870         SDViewPref.getInstance();
1871
1872         Rectangle area = getClientArea();
1873         Image dbuffer = getDrawBuffer();
1874         int height = Math.round((fFrame.getHeight() + 2 * Metrics.FRAME_V_MARGIN) * fZoomValue);
1875
1876         try {
1877             gc.drawImage(dbuffer, 0, 0, area.width, area.height, 0, 0, area.width, area.height);
1878         } catch (Exception e) {
1879             Activator.getDefault().logError("Error drawin content", e); //$NON-NLS-1$
1880         }
1881         dbuffer.dispose();
1882         setHScrollBarIncrement(Math.round(SDViewPref.getInstance().getLifelineWidth() / (float) 2 * fZoomValue));
1883         setVScrollBarIncrement(Math.round(Metrics.getMessagesSpacing() * fZoomValue));
1884         if ((fTimeBar != null) && (fFrame.hasTimeInfo())) {
1885             fTimeBar.resizeContents(9, height + getHorizontalBarHeight());
1886             fTimeBar.setContentsPos(getContentsX(), getContentsY());
1887             fTimeBar.redraw();
1888             fTimeBar.update();
1889         }
1890         float xRatio = getContentsWidth() / (float) getVisibleWidth();
1891         float yRatio = getContentsHeight() / (float) getVisibleHeight();
1892         if (yRatio > xRatio) {
1893             setOverviewSize((int) (getVisibleHeight() * 0.75));
1894         } else {
1895             setOverviewSize((int) (getVisibleWidth() * 0.75));
1896         }
1897     }
1898
1899     @Override
1900     public void widgetDefaultSelected(SelectionEvent event) {
1901     }
1902
1903     @Override
1904     public void widgetSelected(SelectionEvent event) {
1905         if (event.widget == fZoomIn) {
1906             fZoomValue = fZoomValue * 2;
1907         } else if (event.widget == fZoomOut) {
1908             fZoomValue = fZoomValue / 2;
1909         }
1910         redraw();
1911     }
1912
1913     /**
1914      * Called when property changed occurs in the preference page. "PREFOK" is
1915      * fired when the user press the ok or apply button
1916      */
1917     @Override
1918     public void propertyChange(PropertyChangeEvent e) {
1919         if (fFrame != null && !isDisposed()) {
1920             fFrame.resetTimeCompression();
1921         }
1922         if (e.getProperty().equals("PREFOK")) //$NON-NLS-1$
1923         {
1924             // Prepare the overview to be reused for the new
1925             // settings (especially the colors)
1926             if (fOverView != null) {
1927                 fOverView.dispose();
1928             }
1929             fOverView = null;
1930             redraw();
1931         }
1932     }
1933
1934     @Override
1935     public void widgetDisposed(DisposeEvent e) {
1936         if (fOverView != null) {
1937             fOverView.dispose();
1938         }
1939         super.removeDisposeListener(this);
1940         if ((fCurrentCaretImage != null) && (!fCurrentCaretImage.isDisposed())) {
1941             fCurrentCaretImage.dispose();
1942         }
1943         if ((fArrowUpCaretImg != null) && (!fArrowUpCaretImg.isDisposed())) {
1944             fArrowUpCaretImg.dispose();
1945         }
1946         if ((fCollapaseCaretImg != null) && (!fCollapaseCaretImg.isDisposed())) {
1947             fCollapaseCaretImg.dispose();
1948         }
1949         SDViewPref.getInstance().removePropertyChangeListener(this);
1950         LoadersManager lm = LoadersManager.getInstance();
1951         if (fSite instanceof SDView) {
1952             ((SDView) fSite).resetProviders();
1953             if (lm != null) {
1954                 lm.resetLoader(((SDView) fSite).getViewSite().getId());
1955             }
1956         }
1957     }
1958
1959     @Override
1960     protected void drawOverview(GC gc, Rectangle r) {
1961         float oldzoom = fZoomValue;
1962         if (getContentsWidth() > getContentsHeight()) {
1963             fZoomValue = (float) r.width / (float) getContentsWidth() * oldzoom;
1964         } else {
1965             fZoomValue = (float) r.height / (float) getContentsHeight() * oldzoom;
1966         }
1967         if ((fOverView != null) && ((r.width != fOverView.getBounds().width) || (r.height != fOverView.getBounds().height))) {
1968             fOverView.dispose();
1969             fOverView = null;
1970         }
1971         if (fOverView == null) {
1972             int backX = getContentsX();
1973             int backY = getContentsY();
1974             setContentsPos(0, 0);
1975             fOverView = new Image(getDisplay(), r.width, r.height);
1976             GC gcim = new GC(fOverView);
1977             NGC context = new NGC(this, gcim);
1978             context.setBackground(SDViewPref.getInstance().getBackGroundColor(ISDPreferences.PREF_FRAME));
1979             fFrame.draw(context);
1980             setContentsPos(backX, backY);
1981             gcim.dispose();
1982             context.dispose();
1983         }
1984         if ((fOverView != null) && (r.width == fOverView.getBounds().width) && (r.height == fOverView.getBounds().height)) {
1985             gc.drawImage(fOverView, 0, 0, r.width, r.height, 0, 0, r.width, r.height);
1986         }
1987
1988         fZoomValue = oldzoom;
1989
1990         super.drawOverview(gc, r);
1991     }
1992
1993     @Override
1994     public void deltaSelected(Lifeline lifeline, int startEvent, int nbEvent, IColor color) {
1995         fFrame.highlightTimeCompression(lifeline, startEvent, nbEvent, color);
1996         ensureVisible(lifeline);
1997         int y1 = lifeline.getY() + lifeline.getHeight() + (Metrics.getMessageFontHeigth() + Metrics.getMessagesSpacing()) * startEvent;
1998         int y2 = lifeline.getY() + lifeline.getHeight() + (Metrics.getMessageFontHeigth() + Metrics.getMessagesSpacing()) * (startEvent + nbEvent);
1999         ensureVisible(lifeline.getX(), y1 - (Metrics.getLifelineHeaderFontHeigth() + +2 * Metrics.LIFELINE_HEARDER_TEXT_V_MARGIN), lifeline.getWidth(), y2 - y1 + 3, SWT.CENTER | SWT.VERTICAL, true);
2000         redraw();
2001         update();
2002     }
2003
2004     @Override
2005     public int getVisibleWidth() {
2006         if (fIsPrinting) {
2007             return fPrinter.getClientArea().width;
2008         }
2009         return super.getVisibleWidth();
2010     }
2011
2012     @Override
2013     public int getVisibleHeight() {
2014         if (fIsPrinting) {
2015             return fPrinter.getClientArea().height;
2016         }
2017         return super.getVisibleHeight();
2018     }
2019
2020     @Override
2021     public int contentsToViewX(int x) {
2022         if (fIsPrinting) {
2023             int v = Math.round(fPrinterX * fPrinterZoom);
2024             return x - v;
2025         }
2026         return x - getContentsX();
2027     }
2028
2029     @Override
2030     public int contentsToViewY(int y) {
2031         if (fIsPrinting) {
2032             int v = Math.round(fPrinterY * fPrinterZoom);
2033             return y - v;
2034         }
2035         return y - getContentsY();
2036     }
2037
2038     @Override
2039     public int getContentsX() {
2040         if (fIsPrinting) {
2041             return Math.round(fPrinterX * fPrinterZoom);
2042         }
2043         return super.getContentsX();
2044     }
2045
2046     @Override
2047     public int getContentsY() {
2048         if (fIsPrinting) {
2049             return Math.round(fPrinterY * fPrinterZoom);
2050         }
2051         return super.getContentsY();
2052     }
2053
2054     /**
2055      * Traverse Listener implementation.
2056      */
2057     protected static class LocalTraverseListener implements TraverseListener {
2058         @Override
2059         public void keyTraversed(TraverseEvent e) {
2060             if ((e.detail == SWT.TRAVERSE_TAB_NEXT) || (e.detail == SWT.TRAVERSE_TAB_PREVIOUS)) {
2061                 e.doit = true;
2062             }
2063         }
2064     }
2065
2066 }