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     // Attributes
  39     // ------------------------------------------------------------------------
  40
  41     @SuppressWarnings("unused")
  42     private long fTraceStartTime;
  43
  44     // ------------------------------------------------------------------------
  45     // Construction
  46     // ------------------------------------------------------------------------
  47
  48     /**
  49      * Standard constructor
  50      *
  51      * @param parentView A parent histogram view
  52      * @param parent A parent composite to draw in
  53      * @param groupLabel A group value
  54      * @param value A value
  55      * @since 2.0
  56      */
  57     public HistogramCurrentTimeControl(HistogramView parentView, Composite parent,
  58             String groupLabel, long value)
  59     {
  60         super(parentView, parent, groupLabel, value);
  61         TmfSignalManager.register(this);
  62     }
  63
  64     /* (non-Javadoc)
  65      * @see org.eclipse.linuxtools.tmf.ui.views.histogram.HistogramTextControl#dispose()
  66      */
  67     @Override
  68     public void dispose() {
  69         TmfSignalManager.deregister(this);
  70     }
  71
  72     // ------------------------------------------------------------------------
  73     // Operations
  74     // ------------------------------------------------------------------------
  75
  76     @Override
  77     protected void updateValue() {
  78         if (getValue() == Long.MIN_VALUE) {
  79             fTextValue.setText(""); //$NON-NLS-1$
  80             return;
  81         }
  82         String string = fTextValue.getText();
  83         long value = 0;
  84         try {
  85             value = TmfTimestampFormat.getDefaulTimeFormat().parseValue(string, getValue());
  86         } catch (ParseException e) {
  87         }
  88         if (getValue() != value) {
  89             // Make sure that the new time is within range
  90             ITmfTrace trace = fParentView.getTrace();
  91             if (trace != null) {
  92                 TmfTimeRange range = trace.getTimeRange();
  93                 long startTime = range.getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  94                 long endTime = range.getEndTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
  95                 if (value < startTime) {
  96                     value = startTime;
  97                 } else if (value > endTime) {
  98                     value = endTime;
  99                 }
 100             }
 101
 102             // Set and propagate
 103             setValue(value);
 104             fParentView.updateCurrentEventTime(value);
 105         }
 106     }
 107
 108     @Override
 109     public void setValue(long time) {
 110         if (time != Long.MIN_VALUE) {
 111             super.setValue(time, new TmfTimestamp(time, ITmfTimestamp.NANOSECOND_SCALE).toString());
 112         } else {
 113             super.setValue(time, ""); //$NON-NLS-1$
 114         }
 115     }
 116
 117     // ------------------------------------------------------------------------
 118     // Signal Handlers
 119     // ------------------------------------------------------------------------
 120
 121     /**
 122      * Format the timestamp and update the display. Compute the new text size,
 123      * adjust the text and group widgets and then refresh the view layout.
 124      *
 125      * @param signal the incoming signal
 126      * @since 2.0
 127      */
 128     @TmfSignalHandler
 129     public void timestampFormatUpdated(TmfTimestampFormatUpdateSignal signal) {
 130         setValue(getValue());
 131     }
 132
 133 }