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.signal.TmfTraceUpdatedSignal;
  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     // Attributes
  40     // ------------------------------------------------------------------------
  41
  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         String string = fTextValue.getText();
  79         long value = 0;
  80         try {
  81             value = TmfTimestampFormat.getDefaulTimeFormat().parseValue(string, fTraceStartTime);
  82         } catch (ParseException e) {
  83         }
  84
  85         if (getValue() != value) {
  86             // Make sure that the new time is within range
  87             ITmfTrace trace = fParentView.getTrace();
  88             if (trace != null) {
  89                 TmfTimeRange range = trace.getTimeRange();
  90                 long startTime = range.getStartTime().getValue();
  91                 long endTime = range.getEndTime().getValue();
  92                 if (value < startTime) {
  93                     value = startTime;
  94                 } else if (value > endTime) {
  95                     value = endTime;
  96                 }
  97             }
  98
  99             // Set and propagate
 100             setValue(value);
 101             fParentView.updateCurrentEventTime(value);
 102         }
 103     }
 104
 105     @Override
 106     public void setValue(long time) {
 107         super.setValue(time, new TmfTimestamp(time, ITmfTimestamp.NANOSECOND_SCALE).toString());
 108     }
 109
 110     // ------------------------------------------------------------------------
 111     // Signal Handlers
 112     // ------------------------------------------------------------------------
 113
 114     /**
 115      * Update the initial time value
 116      *
 117      * @param signal the time range signal
 118      * @since 2.0
 119      */
 120     @TmfSignalHandler
 121     public void traceUpdated(final TmfTraceUpdatedSignal signal) {
 122         fTraceStartTime = signal.getTrace().getTimeRange().getStartTime().normalize(0, ITmfTimestamp.NANOSECOND_SCALE).getValue();
 123     }
 124
 125     // ------------------------------------------------------------------------
 126     // Signal Handlers
 127     // ------------------------------------------------------------------------
 128
 129     /**
 130      * Format the timestamp and update the display. Compute the new text size,
 131      * adjust the text and group widgets and then refresh the view layout.
 132      *
 133      * @param signal the incoming signal
 134      * @since 2.0
 135      */
 136     @TmfSignalHandler
 137     public void timestampFormatUpdated(TmfTimestampFormatUpdateSignal signal) {
 138         setValue(getValue());
 139     }
 140
 141 }