org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/views/histogram/HistogramCurrentTimeControl.java

   1 /*******************************************************************************
   2  * Copyright (c) 2011, 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Francois Chouinard - Initial API and implementation
  11  *   Francois Chouinard - Moved from LTTng to TMF
  12  *   Francois Chouinard - Simplified constructor, handle interval format change
  13  *   Patrick Tasse - Update value handling
  14  *******************************************************************************/
  15
  16 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  17
  18 import java.text.ParseException;
  19
  20 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler;
  21 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalManager;
  22 import org.eclipse.linuxtools.tmf.core.signal.TmfTimestampFormatUpdateSignal;
  23 import org.eclipse.linuxtools.tmf.core.timestamp.ITmfTimestamp;
  24 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimeRange;
  25 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestamp;
  26 import org.eclipse.linuxtools.tmf.core.timestamp.TmfTimestampFormat;
  27 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  28 import org.eclipse.swt.widgets.Composite;
  29
  30 /**
  31  * This control provides a group containing a text control.
  32  *
  33  * @version 1.1
  34  * @author Francois Chouinard
  35  */
  36 public class HistogramCurrentTimeControl extends HistogramTextControl {
  37
  38     // ------------------------------------------------------------------------
  39     // Construction
  40     // ------------------------------------------------------------------------
  41
  42     /**
  43      * Standard constructor
  44      *
  45      * @param parentView A parent histogram view
  46      * @param parent A parent composite to draw in
  47      * @param groupLabel A group value
  48      * @param value A value
  49      * @since 2.0
  50      */
  51     public HistogramCurrentTimeControl(HistogramView parentView, Composite parent,
  52             String groupLabel, long value)
  53     {
  54         super(parentView, parent, groupLabel, value);
  55         TmfSignalManager.register(this);
  56     }
  57
  58     @Override
  59     public void dispose() {
  60         TmfSignalManager.deregister(this);
  61     }
  62
  63     // ------------------------------------------------------------------------
  64     // Operations
  65     // ------------------------------------------------------------------------
  66
  67     @Override
  68     protected void updateValue() {
  69         if (getValue() == Long.MIN_VALUE) {
  70             fTextValue.setText(""); //$NON-NLS-1$
  71             return;
  72         }
  73         String string = fTextValue.getText();
  74         long value = getValue();
  75         try {
  76             value = TmfTimestampFormat.getDefaulTimeFormat().parseValue(string, getValue());
  77         } catch (ParseException e) {
  78         }
  79         if (getValue() != value) {
  80             // Make sure that the new time is within range
  81             ITmfTrace trace = fParentView.getTrace();
  82             if (trace != null) {
  83                 TmfTimeRange range = trace.getTimeRange();
  84                 long startTime = range.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  85                 long endTime = range.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  86                 if (value < startTime) {
  87                     value = startTime;
  88                 } else if (value > endTime) {
  89                     value = endTime;
  90                 }
  91             }
  92
  93             // Set and propagate
  94             setValue(value);
  95             fParentView.updateSelectionTime(value, value);
  96         } else {
  97             setValue(value);
  98         }
  99     }
 100
 101     @Override
 102     public void setValue(long time) {
 103         if (time != Long.MIN_VALUE) {
 104             super.setValue(time, new TmfTimestamp(time, ITmfTimestamp.NANOSECOND_SCALE).toString());
 105         } else {
 106             super.setValue(time, ""); //$NON-NLS-1$
 107         }
 108     }
 109
 110     // ------------------------------------------------------------------------
 111     // Signal Handlers
 112     // ------------------------------------------------------------------------
 113
 114     /**
 115      * Format the timestamp and update the display. Compute the new text size,
 116      * adjust the text and group widgets and then refresh the view layout.
 117      *
 118      * @param signal the incoming signal
 119      * @since 2.0
 120      */
 121     @TmfSignalHandler
 122     public void timestampFormatUpdated(TmfTimestampFormatUpdateSignal signal) {
 123         setValue(getValue());
 124     }
 125
 126 }