org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/widgets/timegraph/widgets/TimeGraphControl.java

   1 /*****************************************************************************
   2  * Copyright (c) 2007, 2008 Intel Corporation, 2009, 2010, 2011, 2012 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  *   Intel Corporation - Initial API and implementation
  10  *   Ruslan A. Scherbakov, Intel - Initial API and implementation
  11  *   Alvaro Sanchez-Leon - Updated for TMF
  12  *   Patrick Tasse - Refactoring
  13  *
  14  *****************************************************************************/
  15
  16 package org.eclipse.linuxtools.tmf.ui.widgets.timegraph.widgets;
  17
  18 import java.util.ArrayList;
  19 import java.util.Iterator;
  20 import java.util.List;
  21 import java.util.Vector;
  22
  23 import org.eclipse.jface.resource.JFaceResources;
  24 import org.eclipse.jface.resource.LocalResourceManager;
  25 import org.eclipse.jface.viewers.ISelection;
  26 import org.eclipse.jface.viewers.ISelectionChangedListener;
  27 import org.eclipse.jface.viewers.ISelectionProvider;
  28 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.ITimeGraphPresentationProvider;
  29 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.ITimeGraphTreeListener;
  30 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.StateItem;
  31 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.TimeGraphTreeExpansionEvent;
  32 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.ITimeEvent;
  33 import org.eclipse.linuxtools.tmf.ui.widgets.timegraph.model.ITimeGraphEntry;
  34 import org.eclipse.swt.SWT;
  35 import org.eclipse.swt.events.ControlEvent;
  36 import org.eclipse.swt.events.ControlListener;
  37 import org.eclipse.swt.events.FocusEvent;
  38 import org.eclipse.swt.events.FocusListener;
  39 import org.eclipse.swt.events.KeyEvent;
  40 import org.eclipse.swt.events.KeyListener;
  41 import org.eclipse.swt.events.MouseEvent;
  42 import org.eclipse.swt.events.MouseListener;
  43 import org.eclipse.swt.events.MouseMoveListener;
  44 import org.eclipse.swt.events.MouseTrackListener;
  45 import org.eclipse.swt.events.MouseWheelListener;
  46 import org.eclipse.swt.events.PaintEvent;
  47 import org.eclipse.swt.events.SelectionEvent;
  48 import org.eclipse.swt.events.SelectionListener;
  49 import org.eclipse.swt.events.TraverseEvent;
  50 import org.eclipse.swt.events.TraverseListener;
  51 import org.eclipse.swt.graphics.Color;
  52 import org.eclipse.swt.graphics.Cursor;
  53 import org.eclipse.swt.graphics.GC;
  54 import org.eclipse.swt.graphics.Image;
  55 import org.eclipse.swt.graphics.Point;
  56 import org.eclipse.swt.graphics.Rectangle;
  57 import org.eclipse.swt.widgets.Composite;
  58 import org.eclipse.swt.widgets.Display;
  59 import org.eclipse.swt.widgets.Event;
  60 import org.eclipse.swt.widgets.Listener;
  61 import org.eclipse.swt.widgets.ScrollBar;
  62
  63 /**
  64  * Time graph control implementation
  65  *
  66  * @version 1.0
  67  * @author Alvaro Sanchez-Leon
  68  * @author Patrick Tasse
  69  */
  70 public class TimeGraphControl extends TimeGraphBaseControl implements FocusListener, KeyListener, MouseMoveListener, MouseListener, MouseWheelListener, ControlListener, SelectionListener, MouseTrackListener, TraverseListener, ISelectionProvider {
  71
  72     private static final int DRAG_NONE = 0;
  73     private static final int DRAG_TRACE_ITEM = 1;
  74     private static final int DRAG_SPLIT_LINE = 2;
  75     public static final boolean DEFAULT_DRAW_THREAD_JOIN = true;
  76     public static final boolean DEFAULT_DRAW_THREAD_WAIT = true;
  77     public static final boolean DEFAULT_DRAW_THREAD_RELEASE = true;
  78     public static final int H_SCROLLBAR_MAX = Integer.MAX_VALUE - 1;
  79     private static final int CUSTOM_ITEM_HEIGHT = -1; // get item height from provider
  80
  81     private static final double zoomCoeff = 1.5;
  82
  83     private ITimeDataProvider _timeProvider;
  84     private boolean _isInFocus = false;
  85     private boolean _isDragCursor3 = false;
  86     private boolean _isWaitCursor = true;
  87     private boolean _mouseOverSplitLine = false;
  88     private int _itemHeight = CUSTOM_ITEM_HEIGHT;
  89     private int _minimumItemWidth = 0;
  90     private int _topIndex = 0;
  91     private int _dragState = DRAG_NONE;
  92     private int _dragX0 = 0;
  93     private int _dragX = 0;
  94     private int _idealNameSpace = 0;
  95     // private double _timeStep = 10000000;
  96     private long _time0bak;
  97     private long _time1bak;
  98     private ITimeGraphPresentationProvider fTimeGraphProvider = null;
  99     private ItemData _data = null;
 100     private List<SelectionListener> _selectionListeners;
 101     private final List<ISelectionChangedListener> _selectionChangedListeners = new ArrayList<ISelectionChangedListener>();
 102     private final List<ITimeGraphTreeListener> _treeListeners = new ArrayList<ITimeGraphTreeListener>();
 103     private final Cursor _dragCursor3;
 104     private final Cursor _WaitCursor;
 105
 106     // Vertical formatting formatting for the state control view
 107     private final boolean _visibleVerticalScroll = true;
 108     private int _borderWidth = 0;
 109     private int _headerHeight = 0;
 110
 111     private Listener mouseScrollFilterListener;
 112
 113     protected LocalResourceManager fResourceManager = new LocalResourceManager(JFaceResources.getResources());
 114     protected Color[] fEventColorMap = null;
 115
 116     private MouseScrollNotifier fMouseScrollNotifier;
 117     private final Object fMouseScrollNotifierLock = new Object();
 118     private class MouseScrollNotifier extends Thread {
 119         private final static long DELAY = 400L;
 120         private final static long POLLING_INTERVAL = 10L;
 121         private long fLastScrollTime = Long.MAX_VALUE;
 122
 123         @Override
 124         public void run() {
 125             while ((System.currentTimeMillis() - fLastScrollTime) < DELAY) {
 126                 try {
 127                     Thread.sleep(POLLING_INTERVAL);
 128                 } catch (Exception e) {
 129                     return;
 130                 }
 131             }
 132             if (!isInterrupted()) {
 133                 Display.getDefault().asyncExec(new Runnable() {
 134                     @Override
 135                     public void run() {
 136                         if (isDisposed()) {
 137                             return;
 138                         }
 139                         _timeProvider.notifyStartFinishTime();
 140                     }
 141                 });
 142             }
 143             synchronized (fMouseScrollNotifierLock) {
 144                 fMouseScrollNotifier = null;
 145             }
 146         }
 147
 148         public void mouseScrolled() {
 149             fLastScrollTime = System.currentTimeMillis();
 150         }
 151     }
 152
 153     /**
 154      * Standard constructor
 155      *
 156      * @param parent
 157      *            The parent composite object
 158      * @param colors
 159      *            The color scheme to use
 160      */
 161     public TimeGraphControl(Composite parent, TimeGraphColorScheme colors) {
 162
 163         super(parent, colors, SWT.NO_BACKGROUND | SWT.H_SCROLL | SWT.DOUBLE_BUFFERED);
 164
 165         _data = new ItemData();
 166
 167         addFocusListener(this);
 168         addMouseListener(this);
 169         addMouseMoveListener(this);
 170         addMouseTrackListener(this);
 171         addMouseWheelListener(this);
 172         addTraverseListener(this);
 173         addKeyListener(this);
 174         addControlListener(this);
 175         ScrollBar scrollHor = getHorizontalBar();
 176
 177         if (scrollHor != null) {
 178             scrollHor.addSelectionListener(this);
 179         }
 180
 181         _dragCursor3 = new Cursor(super.getDisplay(), SWT.CURSOR_SIZEWE);
 182         _WaitCursor = new Cursor(super.getDisplay(), SWT.CURSOR_WAIT);
 183     }
 184
 185     @Override
 186     public void dispose() {
 187         super.dispose();
 188         _dragCursor3.dispose();
 189         _WaitCursor.dispose();
 190         fResourceManager.dispose();
 191     }
 192
 193     /**
 194      * Sets the timegraph provider used by this timegraph viewer.
 195      *
 196      * @param timeGraphProvider the timegraph provider
 197      */
 198     public void setTimeGraphProvider(ITimeGraphPresentationProvider timeGraphProvider) {
 199         fTimeGraphProvider = timeGraphProvider;
 200         _data.provider = timeGraphProvider;
 201
 202         if (fEventColorMap != null) {
 203             for (Color color : fEventColorMap) {
 204                 fResourceManager.destroyColor(color.getRGB());
 205             }
 206         }
 207         StateItem[] stateItems = fTimeGraphProvider.getStateTable();
 208         if (stateItems != null) {
 209             fEventColorMap = new Color[stateItems.length];
 210             for (int i = 0; i < stateItems.length; i++) {
 211                 fEventColorMap[i] = fResourceManager.createColor(stateItems[i].getStateColor());
 212             }
 213         } else {
 214             fEventColorMap = new Color[] { };
 215         }
 216     }
 217
 218     /**
 219      * Assign the given time provider
 220      *
 221      * @param timeProvider
 222      *            The time provider
 223      */
 224     public void setTimeProvider(ITimeDataProvider timeProvider) {
 225         _timeProvider = timeProvider;
 226         adjustScrolls();
 227         redraw();
 228     }
 229
 230     /**
 231      * Add a selection listener
 232      *
 233      * @param listener
 234      *            The listener to add
 235      */
 236     public void addSelectionListener(SelectionListener listener) {
 237         if (listener == null) {
 238             SWT.error(SWT.ERROR_NULL_ARGUMENT);
 239         }
 240         if (null == _selectionListeners) {
 241             _selectionListeners = new ArrayList<SelectionListener>();
 242         }
 243         _selectionListeners.add(listener);
 244     }
 245
 246     /**
 247      * Remove a selection listener
 248      *
 249      * @param listener
 250      *            The listener to remove
 251      */
 252     public void removeSelectionListener(SelectionListener listener) {
 253         if (null != _selectionListeners) {
 254             _selectionListeners.remove(listener);
 255         }
 256     }
 257
 258     /**
 259      * Selection changed callback
 260      */
 261     public void fireSelectionChanged() {
 262         if (null != _selectionListeners) {
 263             Iterator<SelectionListener> it = _selectionListeners.iterator();
 264             while (it.hasNext()) {
 265                 SelectionListener listener = it.next();
 266                 listener.widgetSelected(null);
 267             }
 268         }
 269     }
 270
 271     /**
 272      * Default selection callback
 273      */
 274     public void fireDefaultSelection() {
 275         if (null != _selectionListeners) {
 276             Iterator<SelectionListener> it = _selectionListeners.iterator();
 277             while (it.hasNext()) {
 278                 SelectionListener listener = it.next();
 279                 listener.widgetDefaultSelected(null);
 280             }
 281         }
 282     }
 283
 284     /**
 285      * Get the traces in the model
 286      *
 287      * @return The array of traces
 288      */
 289     public ITimeGraphEntry[] getTraces() {
 290         return _data.getTraces();
 291     }
 292
 293     /**
 294      * Get the on/off trace filters
 295      *
 296      * @return The array of filters
 297      */
 298     public boolean[] getTraceFilter() {
 299         return _data.getTraceFilter();
 300     }
 301
 302     /**
 303      * Refresh the data for the thing
 304      */
 305     public void refreshData() {
 306         _data.refreshData();
 307         adjustScrolls();
 308         redraw();
 309     }
 310
 311     /**
 312      * Refresh data for the given traces
 313      *
 314      * @param traces
 315      *            The traces to refresh
 316      */
 317     public void refreshData(ITimeGraphEntry[] traces) {
 318         _data.refreshData(traces);
 319         adjustScrolls();
 320         redraw();
 321     }
 322
 323     /**
 324      * Adjust the scoll bars
 325      */
 326     public void adjustScrolls() {
 327         if (null == _timeProvider) {
 328             getHorizontalBar().setValues(0, 1, 1, 1, 1, 1);
 329             return;
 330         }
 331
 332         // HORIZONTAL BAR
 333         // Visible window
 334         long time0 = _timeProvider.getTime0();
 335         long time1 = _timeProvider.getTime1();
 336         // Time boundaries
 337         long timeMin = _timeProvider.getMinTime();
 338         long timeMax = _timeProvider.getMaxTime();
 339
 340         long delta = timeMax - timeMin;
 341
 342         int timePos = 0;
 343         int thumb = H_SCROLLBAR_MAX;
 344
 345         if (delta != 0) {
 346             // Thumb size (page size)
 347             thumb = Math.max(1, (int) (H_SCROLLBAR_MAX * ((double) (time1 - time0) / delta)));
 348             // At the beginning of visible window
 349             timePos = (int) (H_SCROLLBAR_MAX * ((double) (time0 - timeMin) / delta));
 350         }
 351
 352         // position, minimum, maximum, thumb size, increment (half page)t, page
 353         // increment size (full page)
 354         getHorizontalBar().setValues(timePos, 0, H_SCROLLBAR_MAX, thumb, Math.max(1, thumb / 2), Math.max(2, thumb));
 355     }
 356
 357     boolean ensureVisibleItem(int idx, boolean redraw) {
 358         boolean changed = false;
 359         if (idx < 0) {
 360             for (idx = 0; idx < _data._expandedItems.length; idx++) {
 361                 if (_data._expandedItems[idx]._selected) {
 362                     break;
 363                 }
 364             }
 365         }
 366         if (idx >= _data._expandedItems.length) {
 367             return changed;
 368         }
 369         if (idx < _topIndex) {
 370             setTopIndex(idx);
 371             //FIXME:getVerticalBar().setSelection(_topItem);
 372             if (redraw) {
 373                 redraw();
 374             }
 375             changed = true;
 376         } else {
 377             int page = countPerPage();
 378             if (idx >= _topIndex + page) {
 379                 setTopIndex(idx - page + 1);
 380                 //FIXME:getVerticalBar().setSelection(_topItem);
 381                 if (redraw) {
 382                     redraw();
 383                 }
 384                 changed = true;
 385             }
 386         }
 387         return changed;
 388     }
 389
 390     /**
 391      * Assign the given index as the top one
 392      *
 393      * @param idx
 394      *            The index
 395      */
 396     public void setTopIndex(int idx) {
 397         idx = Math.min(idx, _data._expandedItems.length - countPerPage());
 398         idx = Math.max(0,  idx);
 399         _topIndex = idx;
 400         redraw();
 401     }
 402
 403     /**
 404      * Set the expanded state of a given entry
 405      *
 406      * @param entry
 407      *            The entry
 408      * @param expanded
 409      *            True if expanded, false if collapsed
 410      */
 411     public void setExpandedState(ITimeGraphEntry entry, boolean expanded) {
 412         Item item = _data.findItem(entry);
 413         if (item != null && item._expanded != expanded) {
 414             item._expanded = expanded;
 415             _data.updateExpandedItems();
 416             redraw();
 417         }
 418     }
 419
 420     /**
 421      * Add a tree listener
 422      *
 423      * @param listener
 424      *            The listener to add
 425      */
 426     public void addTreeListener(ITimeGraphTreeListener listener) {
 427         if (!_treeListeners.contains(listener)) {
 428             _treeListeners.add(listener);
 429         }
 430     }
 431
 432     /**
 433      * Remove a tree listener
 434      *
 435      * @param listener
 436      *            The listener to remove
 437      */
 438     public void removeTreeListener(ITimeGraphTreeListener listener) {
 439         if (_treeListeners.contains(listener)) {
 440             _treeListeners.remove(listener);
 441         }
 442     }
 443
 444     /**
 445      * Tree event callback
 446      *
 447      * @param entry
 448      *            The affected entry
 449      * @param expanded
 450      *            The expanded state (true for expanded, false for collapsed)
 451      */
 452     public void fireTreeEvent(ITimeGraphEntry entry, boolean expanded) {
 453         TimeGraphTreeExpansionEvent event = new TimeGraphTreeExpansionEvent(this, entry);
 454         for (ITimeGraphTreeListener listener : _treeListeners) {
 455             if (expanded) {
 456                 listener.treeExpanded(event);
 457             } else {
 458                 listener.treeCollapsed(event);
 459             }
 460         }
 461     }
 462
 463     @Override
 464     public ISelection getSelection() {
 465         TimeGraphSelection sel = new TimeGraphSelection();
 466         ITimeGraphEntry trace = getSelectedTrace();
 467         if (null != trace && null != _timeProvider) {
 468             long selectedTime = _timeProvider.getSelectedTime();
 469             ITimeEvent event = Utils.findEvent(trace, selectedTime, 0);
 470             if (event != null) {
 471                 sel.add(event);
 472             } else {
 473                 sel.add(trace);
 474             }
 475         }
 476         return sel;
 477     }
 478
 479     /**
 480      * Get the selection object
 481      *
 482      * @return The selection
 483      */
 484     public ISelection getSelectionTrace() {
 485         TimeGraphSelection sel = new TimeGraphSelection();
 486         ITimeGraphEntry trace = getSelectedTrace();
 487         if (null != trace) {
 488             sel.add(trace);
 489         }
 490         return sel;
 491     }
 492
 493     /**
 494      * Enable/disable one of the traces in the model
 495      *
 496      * @param n
 497      *            1 to enable it, -1 to disable. The method returns immediately
 498      *            if another value is used.
 499      */
 500     public void selectTrace(int n) {
 501         if ((n != 1) && (n != -1)) {
 502             return;
 503         }
 504
 505         boolean changed = false;
 506         int lastSelection = -1;
 507         for (int i = 0; i < _data._expandedItems.length; i++) {
 508             Item item = _data._expandedItems[i];
 509             if (item._selected) {
 510                 lastSelection = i;
 511                 if ((1 == n) && (i < _data._expandedItems.length - 1)) {
 512                     item._selected = false;
 513                     item = _data._expandedItems[i + 1];
 514                     item._selected = true;
 515                     changed = true;
 516                 } else if ((-1 == n) && (i > 0)) {
 517                     item._selected = false;
 518                     item = _data._expandedItems[i - 1];
 519                     item._selected = true;
 520                     changed = true;
 521                 }
 522                 break;
 523             }
 524         }
 525
 526         if (lastSelection < 0 && _data._expandedItems.length > 0) {
 527             Item item = _data._expandedItems[0];
 528             item._selected = true;
 529             changed = true;
 530         }
 531
 532         if (changed) {
 533             ensureVisibleItem(-1, false);
 534             redraw();
 535             fireSelectionChanged();
 536         }
 537     }
 538
 539     /**
 540      * Select an event
 541      *
 542      * @param n
 543      *            1 for next event, -1 for previous event
 544      */
 545     public void selectEvent(int n) {
 546         if (null == _timeProvider) {
 547             return;
 548         }
 549         ITimeGraphEntry trace = getSelectedTrace();
 550         if (trace == null) {
 551             return;
 552         }
 553         long selectedTime = _timeProvider.getSelectedTime();
 554         long endTime = _timeProvider.getEndTime();
 555         ITimeEvent nextEvent;
 556         if (-1 == n && selectedTime > endTime) {
 557             nextEvent = Utils.findEvent(trace, selectedTime, 0);
 558         } else {
 559             nextEvent = Utils.findEvent(trace, selectedTime, n);
 560         }
 561         if (null == nextEvent && -1 == n) {
 562             nextEvent = Utils.getFirstEvent(trace);
 563         }
 564         if (null != nextEvent) {
 565             long nextTime = nextEvent.getTime();
 566             // If last event detected e.g. going back or not moving to a next
 567             // event
 568             if (nextTime <= selectedTime && n == 1) {
 569                 // Select to the end of this last event
 570                 nextTime = nextEvent.getTime() + nextEvent.getDuration();
 571                 // but not beyond the end of the trace
 572                 if (nextTime > endTime) {
 573                     nextTime = endTime;
 574                 }
 575             } else if (n == -1) {
 576                 // for previous event go to its end time unless we were already there
 577                 if (nextEvent.getTime() + nextEvent.getDuration() < selectedTime) {
 578                     nextTime = nextEvent.getTime() + nextEvent.getDuration();
 579                 }
 580             }
 581             _timeProvider.setSelectedTimeNotify(nextTime, true);
 582             fireSelectionChanged();
 583         } else if (1 == n) {
 584             _timeProvider.setSelectedTimeNotify(endTime, true);
 585             fireSelectionChanged();
 586         }
 587     }
 588
 589     /**
 590      * Select the next event
 591      */
 592     public void selectNextEvent() {
 593         selectEvent(1);
 594         // Notify if visible time window has been adjusted
 595         _timeProvider.setStartFinishTimeNotify(_timeProvider.getTime0(), _timeProvider.getTime1());
 596     }
 597
 598     /**
 599      * Select the previous event
 600      */
 601     public void selectPrevEvent() {
 602         selectEvent(-1);
 603         // Notify if visible time window has been adjusted
 604         _timeProvider.setStartFinishTimeNotify(_timeProvider.getTime0(), _timeProvider.getTime1());
 605     }
 606
 607     /**
 608      * Select the next trace
 609      */
 610     public void selectNextTrace() {
 611         selectTrace(1);
 612     }
 613
 614     /**
 615      * Select the previous trace
 616      */
 617     public void selectPrevTrace() {
 618         selectTrace(-1);
 619     }
 620
 621     /**
 622      * Zoom based on mouse cursor location with mouse scrolling
 623      *
 624      * @param zoomIn true to zoom in, false to zoom out
 625      */
 626     public void zoom(boolean zoomIn) {
 627         int globalX = getDisplay().getCursorLocation().x;
 628         Point p = toControl(globalX, 0);
 629         int nameSpace = _timeProvider.getNameSpace();
 630         int timeSpace = _timeProvider.getTimeSpace();
 631         int xPos = Math.max(nameSpace, Math.min(nameSpace + timeSpace, p.x));
 632         long time0 = _timeProvider.getTime0();
 633         long time1 = _timeProvider.getTime1();
 634         long interval = time1 - time0;
 635         if (interval == 0) {
 636             interval = 1;
 637         } // to allow getting out of single point interval
 638         long newInterval;
 639         if (zoomIn) {
 640             newInterval = Math.max(Math.round(interval * 0.8), _timeProvider.getMinTimeInterval());
 641         } else {
 642             newInterval = (long) Math.ceil(interval * 1.25);
 643         }
 644         long center = time0 + Math.round(((double) (xPos - nameSpace) / timeSpace * interval));
 645         long newTime0 = center - Math.round((double) newInterval * (center - time0) / interval);
 646         long newTime1 = newTime0 + newInterval;
 647         _timeProvider.setStartFinishTime(newTime0, newTime1);
 648         synchronized (fMouseScrollNotifierLock) {
 649             if (fMouseScrollNotifier == null) {
 650                 fMouseScrollNotifier = new MouseScrollNotifier();
 651                 fMouseScrollNotifier.start();
 652             }
 653             fMouseScrollNotifier.mouseScrolled();
 654         }
 655     }
 656
 657     /**
 658      * zoom in using single click
 659      */
 660     public void zoomIn() {
 661         long _time0 = _timeProvider.getTime0();
 662         long _time1 = _timeProvider.getTime1();
 663         long _range = _time1 - _time0;
 664         long selTime = _timeProvider.getSelectedTime();
 665         if (selTime <= _time0 || selTime >= _time1) {
 666             selTime = (_time0 + _time1) / 2;
 667         }
 668         long time0 = selTime - (long) ((selTime - _time0) / zoomCoeff);
 669         long time1 = selTime + (long) ((_time1 - selTime) / zoomCoeff);
 670
 671         long inaccuracy = (_timeProvider.getMaxTime() - _timeProvider.getMinTime()) - (time1 - time0);
 672
 673         // Trace.debug("selTime:" + selTime + " time0:" + time0 + " time1:"
 674         // + time1 + " inaccuracy:" + inaccuracy);
 675
 676         if (inaccuracy > 0 && inaccuracy < 100) {
 677             _timeProvider.setStartFinishTimeNotify(_timeProvider.getMinTime(), _timeProvider.getMaxTime());
 678             return;
 679         }
 680
 681         long m = _timeProvider.getMinTimeInterval();
 682         if ((time1 - time0) < m) {
 683             time0 = selTime - (selTime - _time0) * m / _range;
 684             time1 = time0 + m;
 685         }
 686
 687         _timeProvider.setStartFinishTimeNotify(time0, time1);
 688     }
 689
 690     /**
 691      * zoom out using single click
 692      */
 693     public void zoomOut() {
 694         long _time0 = _timeProvider.getTime0();
 695         long _time1 = _timeProvider.getTime1();
 696         long selTime = _timeProvider.getSelectedTime();
 697         if (selTime <= _time0 || selTime >= _time1) {
 698             selTime = (_time0 + _time1) / 2;
 699         }
 700         long time0 = (long) (selTime - (selTime - _time0) * zoomCoeff);
 701         long time1 = (long) (selTime + (_time1 - selTime) * zoomCoeff);
 702
 703         long inaccuracy = (_timeProvider.getMaxTime() - _timeProvider.getMinTime()) - (time1 - time0);
 704         if (inaccuracy > 0 && inaccuracy < 100) {
 705             _timeProvider.setStartFinishTimeNotify(_timeProvider.getMinTime(), _timeProvider.getMaxTime());
 706             return;
 707         }
 708
 709         _timeProvider.setStartFinishTimeNotify(time0, time1);
 710     }
 711
 712     /**
 713      * Return the currently selected trace
 714      *
 715      * @return The entry matching the trace
 716      */
 717     public ITimeGraphEntry getSelectedTrace() {
 718         ITimeGraphEntry trace = null;
 719         int idx = getSelectedIndex();
 720         if (idx >= 0) {
 721             trace = _data._expandedItems[idx]._trace;
 722         }
 723         return trace;
 724     }
 725
 726     /**
 727      * Retrieve the index of the currently selected item
 728      *
 729      * @return The index
 730      */
 731     public int getSelectedIndex() {
 732         int idx = -1;
 733         for (int i = 0; i < _data._expandedItems.length; i++) {
 734             Item item = _data._expandedItems[i];
 735             if (item._selected) {
 736                 idx = i;
 737                 break;
 738             }
 739         }
 740         return idx;
 741     }
 742
 743     boolean toggle(int idx) {
 744         boolean toggled = false;
 745         if (idx >= 0 && idx < _data._expandedItems.length) {
 746             Item item = _data._expandedItems[idx];
 747             if (item._hasChildren) {
 748                 item._expanded = !item._expanded;
 749                 _data.updateExpandedItems();
 750                 adjustScrolls();
 751                 redraw();
 752                 toggled = true;
 753                 fireTreeEvent(item._trace, item._expanded);
 754             }
 755         }
 756         return toggled;
 757     }
 758
 759     int getItemIndexAtY(int y) {
 760         if (y < 0) {
 761             return -1;
 762         }
 763         if (_itemHeight == CUSTOM_ITEM_HEIGHT) {
 764             int ySum = 0;
 765             for (int idx = _topIndex; idx < _data._expandedItems.length; idx++) {
 766                 ySum += _data._expandedItems[idx].itemHeight;
 767                 if (y < ySum) {
 768                     return idx;
 769                 }
 770             }
 771             return -1;
 772         }
 773         int idx = y / _itemHeight;
 774         idx += _topIndex;
 775         if (idx < _data._expandedItems.length) {
 776             return idx;
 777         }
 778         return -1;
 779     }
 780
 781     boolean isOverSplitLine(int x) {
 782         if (x < 0 || null == _timeProvider) {
 783             return false;
 784         }
 785         int w = 4;
 786         int nameWidth = _timeProvider.getNameSpace();
 787         if (x > nameWidth - w && x < nameWidth + w) {
 788             return true;
 789         }
 790         return false;
 791     }
 792
 793     ITimeGraphEntry getEntry(Point pt) {
 794         int idx = getItemIndexAtY(pt.y);
 795         return idx >= 0 ? _data._expandedItems[idx]._trace : null;
 796     }
 797
 798     long getTimeAtX(int x) {
 799         if (null == _timeProvider) {
 800             return -1;
 801         }
 802         long hitTime = -1;
 803         Point size = getCtrlSize();
 804         long time0 = _timeProvider.getTime0();
 805         long time1 = _timeProvider.getTime1();
 806         int nameWidth = _timeProvider.getNameSpace();
 807         x -= nameWidth;
 808         int timeWidth = size.x - nameWidth - RIGHT_MARGIN;
 809         if (x >= 0 && size.x >= nameWidth) {
 810             if (time1 - time0 > timeWidth) {
 811                 // nanosecond smaller than one pixel: use the first integer nanosecond of this pixel's time range
 812                 hitTime = time0 + (long) Math.ceil((time1 - time0) * ((double) x / timeWidth));
 813             } else {
 814                 // nanosecond greater than one pixel: use the nanosecond that covers this pixel start position
 815                 hitTime = time0 + (long) Math.floor((time1 - time0) * ((double) x / timeWidth));
 816             }
 817         }
 818         return hitTime;
 819     }
 820
 821     void selectItem(int idx, boolean addSelection) {
 822         boolean changed = false;
 823         if (addSelection) {
 824             if (idx >= 0 && idx < _data._expandedItems.length) {
 825                 Item item = _data._expandedItems[idx];
 826                 changed = (item._selected == false);
 827                 item._selected = true;
 828             }
 829         } else {
 830             for (int i = 0; i < _data._expandedItems.length; i++) {
 831                 Item item = _data._expandedItems[i];
 832                 if ((i == idx && !item._selected) || (idx == -1 && item._selected)) {
 833                     changed = true;
 834                 }
 835                 item._selected = i == idx;
 836             }
 837         }
 838         changed |= ensureVisibleItem(idx, true);
 839         if (changed) {
 840             redraw();
 841         }
 842     }
 843
 844     /**
 845      * Callback for item selection
 846      *
 847      * @param trace
 848      *            The entry matching the trace
 849      * @param addSelection
 850      *            If the selection is added or removed
 851      */
 852     public void selectItem(ITimeGraphEntry trace, boolean addSelection) {
 853         int idx = _data.findItemIndex(trace);
 854         selectItem(idx, addSelection);
 855     }
 856
 857     /**
 858      * Retrieve the number of entries shown per page.
 859      *
 860      * @return The count
 861      */
 862     public int countPerPage() {
 863         int height = getCtrlSize().y;
 864         int count = 0;
 865         if (_itemHeight == CUSTOM_ITEM_HEIGHT) {
 866             int ySum = 0;
 867             for (int idx = _topIndex; idx < _data._expandedItems.length; idx++) {
 868                 ySum += _data._expandedItems[idx].itemHeight;
 869                 if (ySum >= height) {
 870                     return count;
 871                 }
 872                 count++;
 873             }
 874             for (int idx = _topIndex - 1; idx >= 0; idx--) {
 875                 ySum += _data._expandedItems[idx].itemHeight;
 876                 if (ySum >= height) {
 877                     return count;
 878                 }
 879                 count++;
 880             }
 881             return count;
 882         }
 883         if (height > 0) {
 884             count = height / _itemHeight;
 885         }
 886         return count;
 887     }
 888
 889     /**
 890      * Get the index of the top element
 891      *
 892      * @return The index
 893      */
 894     public int getTopIndex() {
 895         return _topIndex;
 896     }
 897
 898     /**
 899      * Get the number of expanded items
 900      *
 901      * @return The count of expanded items
 902      */
 903     public int getExpandedElementCount() {
 904         return _data._expandedItems.length;
 905     }
 906
 907     /**
 908      * Get an array of all expanded elements
 909      *
 910      * @return The expanded elements
 911      */
 912     public ITimeGraphEntry[] getExpandedElements() {
 913         ArrayList<ITimeGraphEntry> elements = new ArrayList<ITimeGraphEntry>();
 914         for (Item item : _data._expandedItems) {
 915             elements.add(item._trace);
 916         }
 917         return elements.toArray(new ITimeGraphEntry[0]);
 918     }
 919
 920     Point getCtrlSize() {
 921         Point size = getSize();
 922         if (getHorizontalBar().isVisible()) {
 923             size.y -= getHorizontalBar().getSize().y;
 924         }
 925         return size;
 926     }
 927
 928     Rectangle getNameRect(Rectangle bound, int idx, int nameWidth) {
 929         int x = bound.x;
 930         int y = bound.y + (idx - _topIndex) * _itemHeight;
 931         int width = nameWidth;
 932         int height = _itemHeight;
 933         if (_itemHeight == CUSTOM_ITEM_HEIGHT) {
 934             int ySum = 0;
 935             for (int i = _topIndex; i < idx; i++) {
 936                 ySum += _data._expandedItems[i].itemHeight;
 937             }
 938             y = bound.y + ySum;
 939             height = _data._expandedItems[idx].itemHeight;
 940         }
 941         return new Rectangle(x, y, width, height);
 942     }
 943
 944     Rectangle getStatesRect(Rectangle bound, int idx, int nameWidth) {
 945         int x = bound.x + nameWidth;
 946         int y = bound.y + (idx - _topIndex) * _itemHeight;
 947         int width = bound.width - x;
 948         int height = _itemHeight;
 949         if (_itemHeight == CUSTOM_ITEM_HEIGHT) {
 950             int ySum = 0;
 951             for (int i = _topIndex; i < idx; i++) {
 952                 ySum += _data._expandedItems[i].itemHeight;
 953             }
 954             y = bound.y + ySum;
 955             height = _data._expandedItems[idx].itemHeight;
 956         }
 957         return new Rectangle(x, y, width, height);
 958     }
 959
 960     @Override
 961     void paint(Rectangle bounds, PaintEvent e) {
 962         GC gc = e.gc;
 963         gc.setBackground(_colors.getColor(TimeGraphColorScheme.BACKGROUND));
 964         drawBackground(gc, bounds.x, bounds.y, bounds.width, bounds.height);
 965
 966         if (bounds.width < 2 || bounds.height < 2 || null == _timeProvider) {
 967             return;
 968         }
 969
 970         _idealNameSpace = 0;
 971         int nameSpace = _timeProvider.getNameSpace();
 972
 973         // draw empty name space background
 974         gc.setBackground(_colors.getBkColor(false, false, true));
 975         drawBackground(gc, bounds.x, bounds.y, nameSpace, bounds.height);
 976
 977         drawItems(bounds, _timeProvider, _data._expandedItems, _topIndex, nameSpace, gc);
 978
 979         // draw selected time
 980         long time0 = _timeProvider.getTime0();
 981         long time1 = _timeProvider.getTime1();
 982         long selectedTime = _timeProvider.getSelectedTime();
 983         double pixelsPerNanoSec = (bounds.width - nameSpace <= RIGHT_MARGIN) ? 0 : (double) (bounds.width - nameSpace - RIGHT_MARGIN) / (time1 - time0);
 984         int x = bounds.x + nameSpace + (int) ((selectedTime - time0) * pixelsPerNanoSec);
 985         if (x >= nameSpace && x < bounds.x + bounds.width) {
 986             gc.setForeground(_colors.getColor(TimeGraphColorScheme.SELECTED_TIME));
 987             gc.drawLine(x, bounds.y, x, bounds.y + bounds.height);
 988         }
 989
 990         // draw drag line, no line if name space is 0.
 991         if (DRAG_SPLIT_LINE == _dragState) {
 992             gc.setForeground(_colors.getColor(TimeGraphColorScheme.BLACK));
 993             gc.drawLine(bounds.x + nameSpace, bounds.y, bounds.x + nameSpace, bounds.y + bounds.height - 1);
 994         } else if (DRAG_NONE == _dragState && _mouseOverSplitLine && _timeProvider.getNameSpace() > 0) {
 995             gc.setForeground(_colors.getColor(TimeGraphColorScheme.RED));
 996             gc.drawLine(bounds.x + nameSpace, bounds.y, bounds.x + nameSpace, bounds.y + bounds.height - 1);
 997         }
 998     }
 999
1000     /**
1001      * Draw many items at once
1002      *
1003      * @param bounds
1004      *            The rectangle of the area
1005      * @param timeProvider
1006      *            The time provider
1007      * @param items
1008      *            The array items to draw
1009      * @param topIndex
1010      *            The index of the first element to draw
1011      * @param nameSpace
1012      *            The width reserved for the names
1013      * @param gc
1014      *            Reference to the SWT GC object
1015      */
1016     public void drawItems(Rectangle bounds, ITimeDataProvider timeProvider,
1017             Item[] items, int topIndex, int nameSpace, GC gc) {
1018         for (int i = topIndex; i < items.length; i++) {
1019             Item item = items[i];
1020             drawItem(item, bounds, timeProvider, i, nameSpace, gc);
1021         }
1022         fTimeGraphProvider.postDrawControl(bounds, gc);
1023     }
1024
1025     /**
1026      * Draws the item
1027      *
1028      * @param item the item to draw
1029      * @param bounds the container rectangle
1030      * @param i the item index
1031      * @param nameSpace the name space
1032      * @param gc
1033      */
1034     protected void drawItem(Item item, Rectangle bounds, ITimeDataProvider timeProvider, int i, int nameSpace, GC gc) {
1035         ITimeGraphEntry entry = item._trace;
1036         long time0 = timeProvider.getTime0();
1037         long time1 = timeProvider.getTime1();
1038         long selectedTime = timeProvider.getSelectedTime();
1039
1040         Rectangle nameRect = getNameRect(bounds, i, nameSpace);
1041         if (nameRect.y >= bounds.y + bounds.height) {
1042             return;
1043         }
1044
1045         if (! item._trace.hasTimeEvents()) {
1046             Rectangle statesRect = getStatesRect(bounds, i, nameSpace);
1047             nameRect.width += statesRect.width;
1048             drawName(item, nameRect, gc);
1049         } else {
1050             drawName(item, nameRect, gc);
1051         }
1052         Rectangle rect = getStatesRect(bounds, i, nameSpace);
1053         if (rect.isEmpty()) {
1054             fTimeGraphProvider.postDrawEntry(entry, rect, gc);
1055             return;
1056         }
1057         if (time1 <= time0) {
1058             gc.setBackground(_colors.getBkColor(false, false, false));
1059             gc.fillRectangle(rect);
1060             fTimeGraphProvider.postDrawEntry(entry, rect, gc);
1061             return;
1062         }
1063
1064         // Initialize _rect1 to same values as enclosing rectangle rect
1065         Rectangle stateRect = Utils.clone(rect);
1066         boolean selected = item._selected;
1067         // K pixels per second
1068         double pixelsPerNanoSec = (rect.width <= RIGHT_MARGIN) ? 0 : (double) (rect.width - RIGHT_MARGIN) / (time1 - time0);
1069
1070         if (item._trace.hasTimeEvents()) {
1071             fillSpace(rect, gc, selected);
1072             // Drawing rectangle is smaller than reserved space
1073             stateRect.y += 3;
1074             stateRect.height -= 6;
1075
1076             long maxDuration = (timeProvider.getTimeSpace() == 0) ? Long.MAX_VALUE : 1 * (time1 - time0) / timeProvider.getTimeSpace();
1077             Iterator<ITimeEvent> iterator = entry.getTimeEventsIterator(time0, time1, maxDuration);
1078
1079             int lastX = -1;
1080             while (iterator.hasNext()) {
1081                 ITimeEvent event = iterator.next();
1082                 int x = rect.x + (int) ((event.getTime() - time0) * pixelsPerNanoSec);
1083                 int xEnd = rect.x + (int) ((event.getTime() + event.getDuration() - time0) * pixelsPerNanoSec);
1084                 if (x >= rect.x + rect.width || xEnd < rect.x) {
1085                     // event is out of bounds
1086                     continue;
1087                 }
1088                 xEnd = Math.min(rect.x + rect.width, xEnd);
1089                 stateRect.x = Math.max(rect.x, x);
1090                 stateRect.width = Math.max(0, xEnd - stateRect.x + 1);
1091                 if (stateRect.x == lastX) {
1092                     stateRect.width -= 1;
1093                     if (stateRect.width > 0) {
1094                         gc.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
1095                         gc.drawPoint(stateRect.x, stateRect.y - 2);
1096                         stateRect.x += 1;
1097                     }
1098                 } else {
1099                     lastX = x;
1100                 }
1101                 boolean timeSelected = selectedTime >= event.getTime() && selectedTime < event.getTime() + event.getDuration();
1102                 drawState(_colors, event, stateRect, gc, selected, timeSelected);
1103             }
1104         }
1105         fTimeGraphProvider.postDrawEntry(entry, rect, gc);
1106     }
1107
1108     protected void drawName(Item item, Rectangle bounds, GC gc) {
1109         boolean hasTimeEvents = item._trace.hasTimeEvents();
1110         if (! hasTimeEvents) {
1111             gc.setBackground(_colors.getBkColorGroup(item._selected, _isInFocus));
1112             gc.fillRectangle(bounds);
1113             if (item._selected && _isInFocus) {
1114                 gc.setForeground(_colors.getBkColor(item._selected, _isInFocus, false));
1115                 gc.drawRectangle(bounds.x, bounds.y, bounds.width - 1, bounds.height - 1);
1116             }
1117         } else {
1118             gc.setBackground(_colors.getBkColor(item._selected, _isInFocus, true));
1119             gc.setForeground(_colors.getFgColor(item._selected, _isInFocus));
1120             gc.fillRectangle(bounds);
1121         }
1122
1123         // No name to be drawn
1124         if (_timeProvider.getNameSpace() == 0) {
1125             return;
1126         }
1127
1128         int leftMargin = MARGIN + item.level * EXPAND_SIZE;
1129         if (item._hasChildren) {
1130             gc.setForeground(_colors.getFgColorGroup(false, false));
1131             gc.setBackground(_colors.getBkColor(false, false, false));
1132             Rectangle rect = Utils.clone(bounds);
1133             rect.x += leftMargin;
1134             rect.y += (bounds.height - EXPAND_SIZE) / 2;
1135             rect.width = EXPAND_SIZE;
1136             rect.height = EXPAND_SIZE;
1137             gc.fillRectangle(rect);
1138             gc.drawRectangle(rect.x, rect.y, rect.width - 1, rect.height - 1);
1139             int midy = rect.y + rect.height / 2;
1140             gc.drawLine(rect.x + 2, midy, rect.x + rect.width - 3, midy);
1141             if (!item._expanded) {
1142                 int midx = rect.x + rect.width / 2;
1143                 gc.drawLine(midx, rect.y + 2, midx, rect.y + rect.height - 3);
1144             }
1145         }
1146         leftMargin += EXPAND_SIZE + MARGIN;
1147
1148         Image img = fTimeGraphProvider.getItemImage(item._trace);
1149         if (img != null) {
1150             // draw icon
1151             int imgHeight = img.getImageData().height;
1152             int imgWidth = img.getImageData().width;
1153             int x = leftMargin;
1154             int y = bounds.y + (bounds.height - imgHeight) / 2;
1155             gc.drawImage(img, x, y);
1156             leftMargin += imgWidth + MARGIN;
1157         }
1158         String name = item._name;
1159         Point size = gc.stringExtent(name);
1160         if (_idealNameSpace < leftMargin + size.x + MARGIN) {
1161             _idealNameSpace = leftMargin + size.x + MARGIN;
1162         }
1163         if (hasTimeEvents) {
1164             // cut long string with "..."
1165             int width = bounds.width - leftMargin;
1166             int cuts = 0;
1167             while (size.x > width && name.length() > 1) {
1168                 cuts++;
1169                 name = name.substring(0, name.length() - 1);
1170                 size = gc.stringExtent(name + "..."); //$NON-NLS-1$
1171             }
1172             if (cuts > 0) {
1173                 name += "..."; //$NON-NLS-1$
1174             }
1175         }
1176         Rectangle rect = Utils.clone(bounds);
1177         rect.x += leftMargin;
1178         rect.width -= leftMargin;
1179         // draw text
1180         if (rect.width > 0) {
1181             rect.y += (bounds.height - gc.stringExtent(name).y) / 2;
1182             gc.setForeground(_colors.getFgColor(item._selected, _isInFocus));
1183             int textWidth = Utils.drawText(gc, name, rect, true);
1184             leftMargin += textWidth + MARGIN;
1185             rect.y -= 2;
1186
1187             if (hasTimeEvents) {
1188                 // draw middle line
1189                 int x = bounds.x + leftMargin;
1190                 int width = bounds.width - x;
1191                 int midy = bounds.y + bounds.height / 2;
1192                 gc.setForeground(_colors.getColor(TimeGraphColorScheme.MID_LINE));
1193                 gc.drawLine(x, midy, x + width, midy);
1194             }
1195         }
1196     }
1197
1198     protected void drawState(TimeGraphColorScheme colors, ITimeEvent event,
1199             Rectangle rect, GC gc, boolean selected, boolean timeSelected) {
1200
1201         int colorIdx = fTimeGraphProvider.getStateTableIndex(event);
1202         if (colorIdx < 0) {
1203             return;
1204         }
1205         boolean visible = rect.width == 0 ? false : true;
1206
1207         if (visible) {
1208             Color stateColor = null;
1209             if (colorIdx < fEventColorMap.length) {
1210                 stateColor = fEventColorMap[colorIdx];
1211             } else {
1212                 stateColor = Display.getDefault().getSystemColor(SWT.COLOR_BLACK);
1213             }
1214
1215             timeSelected = timeSelected && selected;
1216             if (timeSelected) {
1217                 // modify the color?
1218             }
1219             // fill all rect area
1220             gc.setBackground(stateColor);
1221             gc.fillRectangle(rect);
1222             // get the border color?
1223             gc.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
1224
1225             // draw bounds
1226             if (!timeSelected) {
1227                 // Draw the top and bottom borders i.e. no side borders
1228                 // top
1229                 gc.drawLine(rect.x, rect.y, rect.x + rect.width - 1, rect.y);
1230                 // bottom
1231                 gc.drawLine(rect.x, rect.y + rect.height - 1, rect.x + rect.width - 1, rect.y + rect.height - 1);
1232             }
1233         } else {
1234             gc.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
1235             gc.drawPoint(rect.x, rect.y - 2);
1236             /*
1237             // selected rectangle area is not visible but can be represented
1238             // with a broken vertical line of specified width.
1239             int width = 1;
1240             rect.width = width;
1241             gc.setForeground(stateColor);
1242             int s = gc.getLineStyle();
1243             int w = gc.getLineWidth();
1244             gc.setLineStyle(SWT.LINE_DOT);
1245             gc.setLineWidth(width);
1246             // Trace.debug("Rectangle not visible, drawing vertical line with: "
1247             // + rect.x + "," + rect.y + "," + rect.x + "," + rect.y
1248             // + rect.height);
1249             gc.drawLine(rect.x, rect.y, rect.x, rect.y + rect.height - 1);
1250             gc.setLineStyle(s);
1251             gc.setLineWidth(w);
1252             if (!timeSelected) {
1253                 gc.setForeground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
1254                 gc.drawPoint(rect.x, rect.y);
1255                 gc.drawPoint(rect.x, rect.y + rect.height - 1);
1256             }
1257             */
1258         }
1259         fTimeGraphProvider.postDrawEvent(event, rect, gc);
1260     }
1261
1262     protected void fillSpace(Rectangle rect, GC gc, boolean selected) {
1263         gc.setBackground(_colors.getBkColor(selected, _isInFocus, false));
1264         gc.fillRectangle(rect);
1265         // draw middle line
1266         gc.setForeground(_colors.getColor(TimeGraphColorScheme.MID_LINE));
1267         int midy = rect.y + rect.height / 2;
1268         gc.drawLine(rect.x, midy, rect.x + rect.width, midy);
1269     }
1270
1271     @Override
1272     public void keyTraversed(TraverseEvent e) {
1273         if ((e.detail == SWT.TRAVERSE_TAB_NEXT) || (e.detail == SWT.TRAVERSE_TAB_PREVIOUS)) {
1274             e.doit = true;
1275         }
1276     }
1277
1278     @Override
1279     public void keyPressed(KeyEvent e) {
1280         int idx = -1;
1281         if (_data._expandedItems.length == 0) {
1282             return;
1283         }
1284         if (SWT.HOME == e.keyCode) {
1285             idx = 0;
1286         } else if (SWT.END == e.keyCode) {
1287             idx = _data._expandedItems.length - 1;
1288         } else if (SWT.ARROW_DOWN == e.keyCode) {
1289             idx = getSelectedIndex();
1290             if (idx < 0) {
1291                 idx = 0;
1292             } else if (idx < _data._expandedItems.length - 1) {
1293                 idx++;
1294             }
1295         } else if (SWT.ARROW_UP == e.keyCode) {
1296             idx = getSelectedIndex();
1297             if (idx < 0) {
1298                 idx = 0;
1299             } else if (idx > 0) {
1300                 idx--;
1301             }
1302         } else if (SWT.ARROW_LEFT == e.keyCode) {
1303             selectPrevEvent();
1304         } else if (SWT.ARROW_RIGHT == e.keyCode) {
1305             selectNextEvent();
1306         } else if (SWT.PAGE_DOWN == e.keyCode) {
1307             int page = countPerPage();
1308             idx = getSelectedIndex();
1309             if (idx < 0) {
1310                 idx = 0;
1311             }
1312             idx += page;
1313             if (idx >= _data._expandedItems.length) {
1314                 idx = _data._expandedItems.length - 1;
1315             }
1316         } else if (SWT.PAGE_UP == e.keyCode) {
1317             int page = countPerPage();
1318             idx = getSelectedIndex();
1319             if (idx < 0) {
1320                 idx = 0;
1321             }
1322             idx -= page;
1323             if (idx < 0) {
1324                 idx = 0;
1325             }
1326         } else if (SWT.CR == e.keyCode) {
1327             idx = getSelectedIndex();
1328             if (idx >= 0) {
1329                 if (_data._expandedItems[idx]._hasChildren) {
1330                     toggle(idx);
1331                 } else {
1332                     fireDefaultSelection();
1333                 }
1334             }
1335             idx = -1;
1336         }
1337         if (idx >= 0) {
1338             selectItem(idx, false);
1339             fireSelectionChanged();
1340         }
1341     }
1342
1343     @Override
1344     public void keyReleased(KeyEvent e) {
1345     }
1346
1347     @Override
1348     public void focusGained(FocusEvent e) {
1349         _isInFocus = true;
1350         if (mouseScrollFilterListener == null) {
1351             mouseScrollFilterListener = new Listener() {
1352                 // This filter is used to prevent horizontal scrolling of the view
1353                 // when the mouse wheel is used to zoom
1354                 @Override
1355                 public void handleEvent(Event event) {
1356                     event.doit = false;
1357                 }
1358             };
1359             getDisplay().addFilter(SWT.MouseWheel, mouseScrollFilterListener);
1360         }
1361         redraw();
1362     }
1363
1364     @Override
1365     public void focusLost(FocusEvent e) {
1366         _isInFocus = false;
1367         if (mouseScrollFilterListener != null) {
1368             getDisplay().removeFilter(SWT.MouseWheel, mouseScrollFilterListener);
1369             mouseScrollFilterListener = null;
1370         }
1371         if (DRAG_NONE != _dragState) {
1372             setCapture(false);
1373             _dragState = DRAG_NONE;
1374         }
1375         redraw();
1376     }
1377
1378     /**
1379      * @return If the current view is focused
1380      */
1381     public boolean isInFocus() {
1382         return _isInFocus;
1383     }
1384
1385     /**
1386      * Provide the possibility to control the wait cursor externally e.g. data
1387      * requests in progress
1388      *
1389      * @param waitInd Should we wait indefinitely?
1390      */
1391     public void waitCursor(boolean waitInd) {
1392         // Update cursor as indicated
1393         if (waitInd) {
1394             setCursor(_WaitCursor);
1395             _isWaitCursor = true;
1396         } else {
1397             setCursor(null);
1398             _isWaitCursor = false;
1399         }
1400
1401         // Get ready for next mouse move
1402         _isDragCursor3 = false;
1403     }
1404
1405     /**
1406      * <p>
1407      * If the x, y position is over the vertical split line (name to time
1408      * ranges), then change the cursor to a drag cursor to indicate the user the
1409      * possibility of resizing
1410      * </p>
1411      *
1412      * @param x
1413      * @param y
1414      */
1415     void updateCursor(int x, int y) {
1416         // if Wait cursor not active, check for the need to change to a drag
1417         // cursor
1418         if (_isWaitCursor == false) {
1419             boolean isSplitLine = isOverSplitLine(x);
1420             // No dragcursor is name space is fixed to zero
1421             if (isSplitLine && !_isDragCursor3 && _timeProvider.getNameSpace() > 0) {
1422                 setCursor(_dragCursor3);
1423                 _isDragCursor3 = true;
1424             } else if (!isSplitLine && _isDragCursor3) {
1425                 setCursor(null);
1426                 _isDragCursor3 = false;
1427             }
1428         }
1429     }
1430
1431     @Override
1432     public void mouseMove(MouseEvent e) {
1433         if (null == _timeProvider) {
1434             return;
1435         }
1436         Point size = getCtrlSize();
1437         if (DRAG_TRACE_ITEM == _dragState) {
1438             int nameWidth = _timeProvider.getNameSpace();
1439             int x = e.x - nameWidth;
1440             if (x > 0 && size.x > nameWidth && _dragX != x) {
1441                 _dragX = x;
1442                 double pixelsPerNanoSec = (size.x - nameWidth <= RIGHT_MARGIN) ? 0 : (double) (size.x - nameWidth - RIGHT_MARGIN) / (_time1bak - _time0bak);
1443                 long timeDelta = (long) ((pixelsPerNanoSec == 0) ? 0 : ((_dragX - _dragX0) / pixelsPerNanoSec));
1444                 long time1 = _time1bak - timeDelta;
1445                 long maxTime = _timeProvider.getMaxTime();
1446                 if (time1 > maxTime) {
1447                     time1 = maxTime;
1448                 }
1449                 long time0 = time1 - (_time1bak - _time0bak);
1450                 if (time0 < _timeProvider.getMinTime()) {
1451                     time0 = _timeProvider.getMinTime();
1452                     time1 = time0 + (_time1bak - _time0bak);
1453                 }
1454                 _timeProvider.setStartFinishTime(time0, time1);
1455             }
1456         } else if (DRAG_SPLIT_LINE == _dragState) {
1457             _dragX = e.x;
1458             _timeProvider.setNameSpace(e.x);
1459         } else if (DRAG_NONE == _dragState) {
1460             boolean mouseOverSplitLine = isOverSplitLine(e.x);
1461             if (_mouseOverSplitLine != mouseOverSplitLine) {
1462                 redraw();
1463             }
1464             _mouseOverSplitLine = mouseOverSplitLine;
1465         }
1466         updateCursor(e.x, e.y);
1467     }
1468
1469     @Override
1470     public void mouseDoubleClick(MouseEvent e) {
1471         if (null == _timeProvider) {
1472             return;
1473         }
1474         if (1 == e.button) {
1475             if (isOverSplitLine(e.x) && _timeProvider.getNameSpace() != 0) {
1476                 _timeProvider.setNameSpace(_idealNameSpace);
1477                 boolean mouseOverSplitLine = isOverSplitLine(e.x);
1478                 if (_mouseOverSplitLine != mouseOverSplitLine) {
1479                     redraw();
1480                 }
1481                 _mouseOverSplitLine = mouseOverSplitLine;
1482                 return;
1483             }
1484             int idx = getItemIndexAtY(e.y);
1485             if (idx >= 0) {
1486                 selectItem(idx, false);
1487                 fireDefaultSelection();
1488             }
1489         }
1490     }
1491
1492     @Override
1493     public void mouseDown(MouseEvent e) {
1494         if (null == _timeProvider) {
1495             return;
1496         }
1497         int idx;
1498         if (1 == e.button) {
1499             int nameSpace = _timeProvider.getNameSpace();
1500             if (nameSpace != 0) {
1501                 if (isOverSplitLine(e.x)) {
1502                     _dragState = DRAG_SPLIT_LINE;
1503                     _dragX = _dragX0 = e.x;
1504                     _time0bak = _timeProvider.getTime0();
1505                     _time1bak = _timeProvider.getTime1();
1506                     redraw();
1507                     return;
1508                 }
1509             }
1510
1511             idx = getItemIndexAtY(e.y);
1512             if (idx >= 0) {
1513                 Item item = _data._expandedItems[idx];
1514                 if (item._hasChildren && e.x < nameSpace && e.x < MARGIN + (item.level + 1) * EXPAND_SIZE) {
1515                     toggle(idx);
1516                 } else {
1517                     long hitTime = getTimeAtX(e.x);
1518                     if (hitTime >= 0) {
1519                         // _timeProvider.setSelectedTimeInt(hitTime, false);
1520                         setCapture(true);
1521                         _dragState = DRAG_TRACE_ITEM;
1522                         _dragX = _dragX0 = e.x - nameSpace;
1523                         _time0bak = _timeProvider.getTime0();
1524                         _time1bak = _timeProvider.getTime1();
1525                     }
1526                 }
1527                 selectItem(idx, false);
1528                 fireSelectionChanged();
1529             } else {
1530                 selectItem(idx, false); // clear selection
1531                 redraw();
1532                 fireSelectionChanged();
1533             }
1534         }
1535     }
1536
1537     @Override
1538     public void mouseUp(MouseEvent e) {
1539         if (DRAG_NONE != _dragState) {
1540             setCapture(false);
1541             if (DRAG_TRACE_ITEM == _dragState) {
1542                 // Notify time provider to check the need for listener
1543                 // notification
1544                 _timeProvider.notifyStartFinishTime();
1545                 if (_dragX == _dragX0) { // click without drag
1546                     long time = getTimeAtX(e.x);
1547                     _timeProvider.setSelectedTimeNotify(time, false);
1548                 }
1549             } else if (DRAG_SPLIT_LINE == _dragState) {
1550                 redraw();
1551             }
1552             _dragState = DRAG_NONE;
1553         }
1554     }
1555
1556     @Override
1557     public void mouseEnter(MouseEvent e) {
1558     }
1559
1560     @Override
1561     public void mouseExit(MouseEvent e) {
1562         if (_mouseOverSplitLine) {
1563             _mouseOverSplitLine = false;
1564             redraw();
1565         }
1566     }
1567
1568     @Override
1569     public void mouseHover(MouseEvent e) {
1570     }
1571
1572     @Override
1573     public void mouseScrolled(MouseEvent e) {
1574         if ((mouseScrollFilterListener == null) || _dragState != DRAG_NONE) {
1575             return;
1576         }
1577         boolean zoomScroll = false;
1578         Point p = getParent().toControl(getDisplay().getCursorLocation());
1579         Point parentSize = getParent().getSize();
1580         if (p.x >= 0 && p.x < parentSize.x && p.y >= 0 && p.y < parentSize.y) {
1581             // over the parent control
1582             if (e.x > getCtrlSize().x) {
1583                 // over the horizontal scroll bar
1584                 zoomScroll = false;
1585             } else if (e.y >= 0 && e.y < getCtrlSize().y && e.x < _timeProvider.getNameSpace()) {
1586                 // over the name space
1587                 zoomScroll = false;
1588             } else {
1589                 zoomScroll = true;
1590             }
1591         }
1592         if (zoomScroll && _timeProvider.getTime0() != _timeProvider.getTime1()) {
1593             if (e.count > 0) {
1594                 zoom(true);
1595             } else if (e.count < 0) {
1596                 zoom(false);
1597             }
1598         } else {
1599             setTopIndex(getTopIndex() - e.count);
1600         }
1601     }
1602
1603     @Override
1604     public void controlMoved(ControlEvent e) {
1605     }
1606
1607     @Override
1608     public void controlResized(ControlEvent e) {
1609         adjustScrolls();
1610     }
1611
1612     @Override
1613     public void widgetDefaultSelected(SelectionEvent e) {
1614     }
1615
1616     @Override
1617     public void widgetSelected(SelectionEvent e) {
1618         if (e.widget == getVerticalBar()) {
1619             setTopIndex(getVerticalBar().getSelection());
1620         } else if (e.widget == getHorizontalBar() && null != _timeProvider) {
1621             int start = getHorizontalBar().getSelection();
1622             long time0 = _timeProvider.getTime0();
1623             long time1 = _timeProvider.getTime1();
1624             long timeMin = _timeProvider.getMinTime();
1625             long timeMax = _timeProvider.getMaxTime();
1626             long delta = timeMax - timeMin;
1627
1628             long range = time1 - time0;
1629             // _timeRangeFixed = true;
1630             time0 = timeMin + Math.round(delta * ((double) start / H_SCROLLBAR_MAX));
1631             time1 = time0 + range;
1632
1633             // TODO: Follow-up with Bug 310310
1634             // In Linux SWT.DRAG is the only value received
1635             // https://bugs.eclipse.org/bugs/show_bug.cgi?id=310310
1636             if (e.detail == SWT.DRAG) {
1637                 _timeProvider.setStartFinishTime(time0, time1);
1638             } else {
1639                 _timeProvider.setStartFinishTimeNotify(time0, time1);
1640             }
1641         }
1642     }
1643
1644     /**
1645      * @return The current visibility of the vertical scroll bar
1646      */
1647     public boolean isVisibleVerticalScroll() {
1648         return _visibleVerticalScroll;
1649     }
1650
1651     @Override
1652     public int getBorderWidth() {
1653         return _borderWidth;
1654     }
1655
1656     /**
1657      * Set the border width
1658      *
1659      * @param borderWidth
1660      *            The width
1661      */
1662     public void setBorderWidth(int borderWidth) {
1663         this._borderWidth = borderWidth;
1664     }
1665
1666     /**
1667      * @return The current height of the header row
1668      */
1669     public int getHeaderHeight() {
1670         return _headerHeight;
1671     }
1672
1673     /**
1674      * Set the height of the header row
1675      *
1676      * @param headerHeight
1677      *            The height
1678      */
1679     public void setHeaderHeight(int headerHeight) {
1680         this._headerHeight = headerHeight;
1681     }
1682
1683     /**
1684      * @return The height of regular item rows
1685      */
1686     public int getItemHeight() {
1687         return _itemHeight;
1688     }
1689
1690     /**
1691      * Set the height of regular itew rows
1692      *
1693      * @param rowHeight
1694      *            The height
1695      */
1696     public void setItemHeight(int rowHeight) {
1697         this._itemHeight = rowHeight;
1698     }
1699
1700     /**
1701      * Set the minimum item width
1702      *
1703      * @param width The minimum width
1704      */
1705     public void setMinimumItemWidth(int width) {
1706         this._minimumItemWidth = width;
1707     }
1708
1709     /**
1710      * @return The minimum item width
1711      */
1712     public int getMinimumItemWidth() {
1713         return _minimumItemWidth;
1714     }
1715
1716     /**
1717      * @return The entries that are currently filtered out
1718      */
1719     public Vector<ITimeGraphEntry> getFilteredOut() {
1720         return _data.getFilteredOut();
1721     }
1722
1723     // @Override
1724     @Override
1725     public void addSelectionChangedListener(ISelectionChangedListener listener) {
1726         if (listener != null) {
1727             if (!_selectionChangedListeners.contains(listener)) {
1728                 _selectionChangedListeners.add(listener);
1729             }
1730         }
1731     }
1732
1733     // @Override
1734     @Override
1735     public void removeSelectionChangedListener(ISelectionChangedListener listener) {
1736         if (listener != null) {
1737             _selectionChangedListeners.remove(listener);
1738         }
1739     }
1740
1741     // @Override
1742     @Override
1743     public void setSelection(ISelection selection) {
1744         if (selection instanceof TimeGraphSelection) {
1745             TimeGraphSelection sel = (TimeGraphSelection) selection;
1746             Object ob = sel.getFirstElement();
1747             if (ob instanceof ITimeGraphEntry) {
1748                 ITimeGraphEntry trace = (ITimeGraphEntry) ob;
1749                 selectItem(trace, false);
1750             }
1751         }
1752
1753     }
1754
1755     private class ItemData {
1756         public Item[] _expandedItems = new Item[0];
1757         public Item[] _items = new Item[0];
1758         private ITimeGraphEntry _traces[] = new ITimeGraphEntry[0];
1759         private boolean traceFilter[] = new boolean[0];
1760         private final Vector<ITimeGraphEntry> filteredOut = new Vector<ITimeGraphEntry>();
1761         public ITimeGraphPresentationProvider provider;
1762
1763         public ItemData() {
1764         }
1765
1766         Item findItem(ITimeGraphEntry entry) {
1767             if (entry == null) {
1768                 return null;
1769             }
1770
1771             for (int i = 0; i < _items.length; i++) {
1772                 Item item = _items[i];
1773                 if (item._trace == entry) {
1774                     return item;
1775                 }
1776             }
1777
1778             return null;
1779         }
1780
1781         int findItemIndex(ITimeGraphEntry trace) {
1782             if (trace == null) {
1783                 return -1;
1784             }
1785
1786             for (int i = 0; i < _expandedItems.length; i++) {
1787                 Item item = _expandedItems[i];
1788                 if (item._trace == trace) {
1789                     return i;
1790                 }
1791             }
1792
1793             return -1;
1794         }
1795
1796         public void refreshData() {
1797             List<Item> itemList = new ArrayList<Item>();
1798             filteredOut.clear();
1799             for (int i = 0; i < _traces.length; i++) {
1800                 ITimeGraphEntry entry = _traces[i];
1801                 refreshData(itemList, null, 0, entry);
1802             }
1803             _items = itemList.toArray(new Item[0]);
1804             updateExpandedItems();
1805         }
1806
1807         private void refreshData(List<Item> itemList, Item parent, int level, ITimeGraphEntry entry) {
1808             Item item = new Item(entry, entry.getName(), level);
1809             if (parent != null) {
1810                 parent.children.add(item);
1811             }
1812             item.itemHeight = provider.getItemHeight(entry);
1813             itemList.add(item);
1814             if (entry.hasChildren()) {
1815                 item._expanded = true;
1816                 item._hasChildren = true;
1817                 for (ITimeGraphEntry child : entry.getChildren()) {
1818                     refreshData(itemList, item, level + 1, child);
1819                 }
1820             }
1821         }
1822
1823         public void updateExpandedItems() {
1824             List<Item> expandedItemList = new ArrayList<Item>();
1825             for (int i = 0; i < _traces.length; i++) {
1826                 ITimeGraphEntry entry = _traces[i];
1827                 Item item = findItem(entry);
1828                 refreshExpanded(expandedItemList, item);
1829             }
1830             _expandedItems = expandedItemList.toArray(new Item[0]);
1831         }
1832
1833         private void refreshExpanded(List<Item> expandedItemList, Item item) {
1834             expandedItemList.add(item);
1835             if (item._hasChildren && item._expanded) {
1836                 for (Item child : item.children) {
1837                     refreshExpanded(expandedItemList, child);
1838                 }
1839             }
1840         }
1841
1842         public void refreshData(ITimeGraphEntry traces[]) {
1843             if (traces == null || traces.length == 0) {
1844                 traceFilter = null;
1845             } else if (traceFilter == null || traces.length != traceFilter.length) {
1846                 traceFilter = new boolean[traces.length];
1847                 java.util.Arrays.fill(traceFilter, true);
1848             }
1849
1850             _traces = traces;
1851             refreshData();
1852         }
1853
1854         public ITimeGraphEntry[] getTraces() {
1855             return _traces;
1856         }
1857
1858         public boolean[] getTraceFilter() {
1859             return traceFilter;
1860         }
1861
1862         public Vector<ITimeGraphEntry> getFilteredOut() {
1863             return filteredOut;
1864         }
1865     }
1866
1867     private class Item {
1868         public boolean _expanded;
1869         public boolean _selected;
1870         public boolean _hasChildren;
1871         public int itemHeight;
1872         public int level;
1873         public List<Item> children;
1874         public String _name;
1875         public ITimeGraphEntry _trace;
1876
1877         public Item(ITimeGraphEntry trace, String name, int level) {
1878             this._trace = trace;
1879             this._name = name;
1880             this.level = level;
1881             this.children = new ArrayList<Item>();
1882         }
1883
1884         @Override
1885         public String toString() {
1886             return _name;
1887         }
1888     }
1889
1890 }
1891