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

   1 /*******************************************************************************
   2  * Copyright (c) 2011, 2012 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  *******************************************************************************/
  14
  15 package org.eclipse.linuxtools.tmf.ui.views.histogram;
  16
  17 import java.text.ParseException;
  18
  19 import org.eclipse.linuxtools.tmf.core.event.ITmfTimestamp;
  20 import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange;
  21 import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp;
  22 import org.eclipse.linuxtools.tmf.core.event.TmfTimestampFormat;
  23 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalHandler;
  24 import org.eclipse.linuxtools.tmf.core.signal.TmfSignalManager;
  25 import org.eclipse.linuxtools.tmf.core.signal.TmfTimestampFormatUpdateSignal;
  26 import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
  27 import org.eclipse.swt.widgets.Composite;
  28
  29 /**
  30  * This control provides a group containing a text control.
  31  *
  32  * @version 1.1
  33  * @author Francois Chouinard
  34  */
  35 public class HistogramCurrentTimeControl extends HistogramTextControl {
  36
  37     // ------------------------------------------------------------------------
  38     // Construction
  39     // ------------------------------------------------------------------------
  40
  41     /**
  42      * Standard constructor
  43      *
  44      * @param parentView A parent histogram view
  45      * @param parent A parent composite to draw in
  46      * @param groupLabel A group value
  47      * @param value A value
  48      * @since 2.0
  49      */
  50     public HistogramCurrentTimeControl(HistogramView parentView, Composite parent,
  51             String groupLabel, long value)
  52     {
  53         super(parentView, parent, groupLabel, value);
  54         TmfSignalManager.register(this);
  55     }
  56
  57     /* (non-Javadoc)
  58      * @see org.eclipse.linuxtools.tmf.ui.views.histogram.HistogramTextControl#dispose()
  59      */
  60     @Override
  61     public void dispose() {
  62         TmfSignalManager.deregister(this);
  63     }
  64
  65     // ------------------------------------------------------------------------
  66     // Operations
  67     // ------------------------------------------------------------------------
  68
  69     @Override
  70     protected void updateValue() {
  71         if (getValue() == Long.MIN_VALUE) {
  72             fTextValue.setText(""); //$NON-NLS-1$
  73             return;
  74         }
  75         String string = fTextValue.getText();
  76         long value = 0;
  77         try {
  78             value = TmfTimestampFormat.getDefaulTimeFormat().parseValue(string, getValue());
  79         } catch (ParseException e) {
  80         }
  81         if (getValue() != value) {
  82             // Make sure that the new time is within range
  83             ITmfTrace trace = fParentView.getTrace();
  84             if (trace != null) {
  85                 TmfTimeRange range = trace.getTimeRange();
  86                 long startTime = range.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  87                 long endTime = range.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  88                 if (value < startTime) {
  89                     value = startTime;
  90                 } else if (value > endTime) {
  91                     value = endTime;
  92                 }
  93             }
  94
  95             // Set and propagate
  96             setValue(value);
  97             fParentView.updateCurrentEventTime(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 }