org.eclipse.swt.widgets.Canvas.addListener()方法的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
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本文整理了Java中org.eclipse.swt.widgets.Canvas.addListener()方法的一些代码示例，展示了Canvas.addListener()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Canvas.addListener()方法的具体详情如下：
包路径：org.eclipse.swt.widgets.Canvas
类名称：Canvas
方法名：addListener

Canvas.addListener介绍

暂无

代码示例

代码示例来源：origin: pentaho/pentaho-kettle

text = new Text( parent, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL );
canvas = new Canvas( parent, SWT.BORDER );
canvas.addListener( SWT.Paint, new Listener() {
 public void handleEvent( Event event ) {
  paintCanvas( event );

代码示例来源：origin: org.eclipse/org.eclipse.help.ui

public void addListener(int e, Listener l) {
  super.addListener(e, l);
  //label.addListener(e, l);
}

代码示例来源：origin: BiglySoftware/BiglyBT

private void createPieceDistPanel() {
  comp.setLayout(new FillLayout());
  //pieceDistComposite = new Composite(parent, SWT.NONE);
  pieceDistCanvas = new Canvas(comp,SWT.NO_BACKGROUND);
  pieceDistCanvas.addListener(SWT.Paint, new Listener() {
    @Override
    public void handleEvent(Event event) {
      if ( pem==null || pem.isDestroyed()){
        event.gc.fillRectangle(event.x, event.y, event.width, event.height);
      }else{
        if (imgToPaint != null && !imgToPaint.isDisposed()) {
          event.gc.drawImage(imgToPaint, 0, 0);
        }
      }
    }
  });
}

代码示例来源：origin: BiglySoftware/BiglyBT

@Override
public void initialize(Canvas canvas) {
  super.initialize(canvas);
  drawCanvas.addPaintListener(new PaintListener() {
     @Override
     public void paintControl(PaintEvent e) {
       if (bufferImage != null && !bufferImage.isDisposed()) {
         Rectangle bounds = bufferImage.getBounds();
         if (bounds.width >= ( e.width + e.x ) && bounds.height >= ( e.height + e.y )) {
           e.gc.drawImage(bufferImage, e.x, e.y, e.width, e.height, e.x, e.y,
               e.width, e.height);
         }
       }
     }
   });
  drawCanvas.addListener(SWT.Resize, new Listener() {
     @Override
     public void handleEvent(Event event) {
       drawChart(true);
     }
   });
}

代码示例来源：origin: BiglySoftware/BiglyBT

canvas.addListener(SWT.Resize, new Listener() {
   @Override
   public void handleEvent(Event event) {

代码示例来源：origin: diffplug/gradle-and-eclipse-rcp

public ColorPicker(Composite parent) {
  super(new Canvas(parent, SWT.DOUBLE_BUFFERED));
  setY(128);
  wrapped.addListener(SWT.Paint, e -> {
    Point size = wrapped.getSize();
    Image img = getMapFor(e.display);
    e.gc.drawImage(img, 0, 0, _256, _256, 0, 0, size.x, size.y);
  });
  mouseDown = SwtRx.addListener(wrapped, SWT.MouseDown).map(this::posToColor);
  mouseMove = SwtRx.addListener(wrapped, SWT.MouseMove).map(this::posToColor);
}

代码示例来源：origin: BiglySoftware/BiglyBT

public void
initialize(
  Canvas     canvas,
  boolean	is_active )
{
   super.initialize(canvas);
   drawCanvas.addPaintListener(new PaintListener() {
      @Override
      public void paintControl(PaintEvent e) {
        if (bufferImage != null && !bufferImage.isDisposed()) {
          Rectangle bounds = bufferImage.getBounds();
          if (bounds.width >= ( e.width + e.x ) && bounds.height >= ( e.height + e.y )) {
            e.gc.drawImage(bufferImage, e.x, e.y, e.width, e.height, e.x, e.y, e.width, e.height);
          }
        }
      }
    });
   drawCanvas.addListener(SWT.Resize, new Listener() {
      @Override
      public void handleEvent(Event event) {
        drawChart(true);
      }
    });
   setActive( is_active );
}

代码示例来源：origin: com.diffplug.durian/durian-swt

public NoBorderBtn(Composite parent) {
  super(new Canvas(parent, SWT.NONE));
  wrapped.addListener(SWT.Paint, e -> {
    Point size = wrapped.getSize();
    // fill the background based on the "enabled" status
    Color backgroundColor = wrapped.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
    e.gc.setBackground(backgroundColor);
    e.gc.fillRectangle(0, 0, size.x, size.y);
    // draw the image
    if (img != null) {
      int deltaX = size.x - imgBounds.width;
      int deltaY = size.y - imgBounds.height;
      e.gc.drawImage(img, deltaX / 2, deltaY / 2);
    }
  });
  // send a selection event on each click (if we aren't disabled)
  wrapped.addListener(SWT.MouseDown, e -> {
    if (enabled) {
      selection.onNext(this);
    }
  });
  // send a "completed" event when we finish
  wrapped.addListener(SWT.Dispose, e -> {
    selection.onComplete();
  });
}

代码示例来源：origin: org.eclipse.rap/org.eclipse.rap.rwt

/**
 * Adds the listener to the collection of listeners who will
 * be notified when the receiver needs to be painted, by sending it
 * one of the messages defined in the <code>PaintListener</code>
 * interface.
 *
 * @param listener the listener which should be notified
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see PaintListener
 * @see #removePaintListener
 * @since 1.3
 */
public void addPaintListener( PaintListener listener ) {
 checkWidget();
 if( listener == null ) {
  error( SWT.ERROR_NULL_ARGUMENT );
 }
 TypedListener typedListener = new TypedListener( listener );
 addListener( SWT.Paint, typedListener );
}

代码示例来源：origin: BiglySoftware/BiglyBT

public AnimatedImage(Composite parent) {
  canvas = new Canvas(parent,SWT.NO_BACKGROUND);
  Color background = null;
  Composite p = parent;
  while(p != null && background == null) {
    background = p.getBackground();
    if(background != null) {
      //System.out.println("background : " + background + ", composite : " + p);
      break;
    }
    p = p.getParent();
  }
  canvas.setBackground(background);
  canvas.addListener(SWT.Dispose, new Listener() {
    @Override
    public void handleEvent(Event event) {
      stop();
      disposeImages();
    }
  });
}

代码示例来源：origin: BiglySoftware/BiglyBT

drawCanvas.addListener(SWT.Resize, new Listener() {
   @Override
   public void handleEvent(Event event) {

代码示例来源：origin: org.eclipse.platform/org.eclipse.swt.examples

void headerShowToolTip (int x) {
  String tooltip = headerGetToolTip (x);
  if (tooltip == null || tooltip.length () == 0) return;

  if (toolTipShell == null) {
    toolTipShell = new Shell (getShell (), SWT.ON_TOP | SWT.TOOL);
    toolTipLabel = new Label (toolTipShell, SWT.CENTER);
    Display display = toolTipShell.getDisplay ();
    toolTipLabel.setForeground (display.getSystemColor (SWT.COLOR_INFO_FOREGROUND));
    toolTipLabel.setBackground (display.getSystemColor (SWT.COLOR_INFO_BACKGROUND));
    for (int toolTipEvent : toolTipEvents) {
      header.addListener (toolTipEvent, toolTipListener);
    }
  }
  if (headerUpdateToolTip (x)) {
    toolTipShell.setVisible (true);
  } else {
    headerHideToolTip ();
  }
}
boolean headerUpdateToolTip (int x) {

代码示例来源：origin: org.xworker/xworker_swt

imageCanvas.addListener(SWT.MouseDown, this);
imageCanvas.addListener(SWT.MouseMove, this);
imageCanvas.addListener(SWT.MouseHover, this);		
imageCanvas.addListener(SWT.MouseUp, this);
imageCanvas.addListener(SWT.KeyDown, this);
imageCanvas.addListener(SWT.KeyUp, this);
imageCanvas.addListener(SWT.MouseWheel, this);
imageCanvas.addPaintListener(this);

代码示例来源：origin: BiglySoftware/BiglyBT

cHeaderArea.addListener(SWT.MenuDetect, new Listener() {
  @Override
  public void handleEvent(Event event) {

代码示例来源：origin: org.eclipse/org.eclipse.jdt.ui

protected void adjustItemNumber() {
  if (fComposite == null)
    return;
  Control[] children= fComposite.getChildren();
  int oldSize= children.length;
  int newSize= fInput == null ? 0 : fInput.fAnnotations.length;
  Display display= fShell.getDisplay();
  // add missing items
  for (int i= oldSize; i < newSize; i++) {
    Canvas canvas= new Canvas(fComposite, SWT.NONE);
    Object gridData= fLayouter.getLayoutData();
    canvas.setLayoutData(gridData);
    canvas.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
    canvas.addPaintListener(fPaintListener);
    canvas.addMouseTrackListener(fMouseTrackListener);
    canvas.addMouseListener(fMouseListener);
    canvas.addListener(SWT.MenuDetect, fMenuDetectListener);
    canvas.addDisposeListener(fDisposeListener);
  }
  // dispose of exceeding resources
  for (int i= oldSize; i > newSize; i--) {
    Item item= (Item) children[i - 1].getData();
    item.deselect();
    children[i - 1].dispose();
  }
}

代码示例来源：origin: org.eclipse.scout.sdk.deps/org.eclipse.jdt.ui

protected void adjustItemNumber() {
  if (fComposite == null)
    return;
  Control[] children= fComposite.getChildren();
  int oldSize= children.length;
  int newSize= fInput == null ? 0 : fInput.fAnnotations.length;
  Display display= fShell.getDisplay();
  // add missing items
  for (int i= oldSize; i < newSize; i++) {
    Canvas canvas= new Canvas(fComposite, SWT.NONE);
    Object gridData= fLayouter.getLayoutData();
    canvas.setLayoutData(gridData);
    canvas.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
    canvas.addPaintListener(fPaintListener);
    canvas.addMouseTrackListener(fMouseTrackListener);
    canvas.addMouseListener(fMouseListener);
    canvas.addListener(SWT.MenuDetect, fMenuDetectListener);
    canvas.addDisposeListener(fDisposeListener);
  }
  // dispose of exceeding resources
  for (int i= oldSize; i > newSize; i--) {
    Item item= (Item) children[i - 1].getData();
    item.deselect();
    children[i - 1].dispose();
  }
}

代码示例来源：origin: org.eclipse.jdt/org.eclipse.jdt.ui

protected void adjustItemNumber() {
  if (fComposite == null)
    return;
  Control[] children= fComposite.getChildren();
  int oldSize= children.length;
  int newSize= fInput == null ? 0 : fInput.fAnnotations.length;
  Display display= fShell.getDisplay();
  // add missing items
  for (int i= oldSize; i < newSize; i++) {
    Canvas canvas= new Canvas(fComposite, SWT.NONE);
    Object gridData= fLayouter.getLayoutData();
    canvas.setLayoutData(gridData);
    canvas.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
    canvas.addPaintListener(fPaintListener);
    canvas.addMouseTrackListener(fMouseTrackListener);
    canvas.addMouseListener(fMouseListener);
    canvas.addListener(SWT.MenuDetect, fMenuDetectListener);
    canvas.addDisposeListener(fDisposeListener);
  }
  // dispose of exceeding resources
  for (int i= oldSize; i > newSize; i--) {
    Item item= (Item) children[i - 1].getData();
    item.deselect();
    children[i - 1].dispose();
  }
}

代码示例来源：origin: BiglySoftware/BiglyBT

canvas.addListener(SWT.Resize, new Listener() {
  @Override
  public void handleEvent(Event event) {

代码示例来源：origin: BiglySoftware/BiglyBT

canvas.addListener(SWT.Resize, new Listener() {
  @Override
  public void handleEvent(Event event) {

代码示例来源：origin: org.eclipse.platform/org.eclipse.swt.examples

void createCanvas(Composite parent) {
  int style = SWT.NO_BACKGROUND;
  if (dbItem.getSelection()) style |= SWT.DOUBLE_BUFFERED;
  canvas = new Canvas(parent, style);
  canvas.addListener(SWT.Paint, event -> {
    GC gc = event.gc;
    Rectangle rect = canvas.getClientArea();
    Device device = gc.getDevice();
    Pattern pattern = null;
    if (background.getBgColor1() != null) {
      if (background.getBgColor2() != null) { // gradient
        pattern = new Pattern(device, 0, 0, rect.width,
            rect.height,
            background.getBgColor1(),
            background.getBgColor2());
        gc.setBackgroundPattern(pattern);
      } else {	// solid color
        gc.setBackground(background.getBgColor1());
      }
    } else if (background.getBgImage() != null) {		// image
      pattern = new Pattern(device, background.getBgImage());
      gc.setBackgroundPattern(pattern);
    }
    gc.fillRectangle(rect);
    GraphicsTab tab = getTab();
    if (tab != null) tab.paint(gc, rect.width, rect.height);
    if (pattern != null) pattern.dispose();
  });
}

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