Attachment 52347 Details for Bug 160904 – Snippet with workaround

Snippet with workaround

FigureCanvasTransparency.java (text/plain), 4.38 KB, created by E F

on 2006-10-19 16:45:23 EDT

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Filename:

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Creator: E F

Created: 2006-10-19 16:45:23 EDT

Size: 4.38 KB

patch

obsolete

>package standalone;
>
>import org.eclipse.draw2d.Figure;
>import org.eclipse.draw2d.FigureCanvas;
>import org.eclipse.draw2d.IFigure;
>import org.eclipse.draw2d.RoundedRectangle;
>import org.eclipse.draw2d.geometry.Rectangle;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.PaintEvent;
>import org.eclipse.swt.events.PaintListener;
>import org.eclipse.swt.graphics.Color;
>import org.eclipse.swt.graphics.GC;
>import org.eclipse.swt.layout.FillLayout;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Shell;
>
>public class FigureCanvasTransparency {
>
>  private static int xStart = -1;
>  private static int yStart = -1;
>  private static int xEnd = -1;
>  private static int yEnd = -1;
>  private static boolean mouseDown = false;
>  private static FigureCanvas canvas;
>  private static FigureCanvasTransparency instance;
>
>  public static void main(String[] args) {
>    instance = new FigureCanvasTransparency();
>    final Display display = new Display();
>    final Shell figurecanvasTransparencyTestShell = new Shell();
>    figurecanvasTransparencyTestShell.setLayout(new FillLayout());
>    figurecanvasTransparencyTestShell.setText("FigureCanvas Transparency Test");
>
>    canvas = new FigureCanvas(figurecanvasTransparencyTestShell, SWT.NONE);
>    IFigure root = new Figure();
>    root.setOpaque(false);
>    root.setBounds(new Rectangle(0, 0, 575, 350));
>
>    RoundedRectangle rect1 = new RoundedRectangle();
>    rect1.setBackgroundColor(Display.getCurrent().getSystemColor(SWT.COLOR_YELLOW));
>    rect1.setFill(true);
>    rect1.setBounds(new Rectangle(100, 100, 200, 150));
>    rect1.setOpaque(false);
>    root.add(rect1);
>
>    RoundedRectangle rect2 = new RoundedRectangle();
>    rect2.setBackgroundColor(Display.getCurrent().getSystemColor(SWT.COLOR_TITLE_BACKGROUND_GRADIENT));
>    rect2.setFill(true);
>    rect2.setBounds(new Rectangle(250, 150, 200, 150));
>    rect2.setOpaque(false);
>    root.add(rect2);
>
>    canvas.setContents(root);
>    instance.createGesturePaintListener();
>    instance.createGestureOnMouseMove();
>    instance.createZoomGestureOnMouseClick();
>
>    figurecanvasTransparencyTestShell.setSize(600, 400);
>    figurecanvasTransparencyTestShell.open();
>    figurecanvasTransparencyTestShell.layout();
>    while (!figurecanvasTransparencyTestShell.isDisposed()) {
>      if (!display.readAndDispatch())
>        display.sleep();
>    }
>  }
>
>  private void createZoomGestureOnMouseClick() {
>    canvas.addMouseListener(new org.eclipse.swt.events.MouseAdapter() {
>      public void mouseDown(org.eclipse.swt.events.MouseEvent event) {
>        doGestureOnMouseDown(event);
>      }
>
>      public void mouseUp(org.eclipse.swt.events.MouseEvent event) {
>        doGestureOnMouseUp(event);
>      }
>    });
>  }
>
>  private void doGestureOnMouseDown(org.eclipse.swt.events.MouseEvent event) {
>    final org.eclipse.swt.events.MouseEvent e = event;
>      mouseDown = true;
>      xStart = e.x;
>      yStart = e.y;
>  }
>
>  /**
>   * @param event
>   */
>  private void doGestureOnMouseUp(org.eclipse.swt.events.MouseEvent event) {
>    final org.eclipse.swt.events.MouseEvent e = event;
>      mouseDown = false;
>      xEnd = e.x;
>      yEnd = e.y;
>  }
>
>  private void createGestureOnMouseMove() {
>    canvas.addMouseMoveListener(new org.eclipse.swt.events.MouseMoveListener() {
>      public void mouseMove(org.eclipse.swt.events.MouseEvent e) {
>          if (!mouseDown) {
>            return;
>          }
>          xEnd = e.x;
>          yEnd = e.y;
>          canvas.redraw();
>        }
>    });
>  }
>
>  /**
>   * 
>   */
>  private void createGesturePaintListener() {
>    canvas.addPaintListener(new PaintListener() {
>      public void paintControl(PaintEvent event) {
>          if (mouseDown) {
>            drawGesture(event.gc);
>          }
>      }
>    });
>  }
>
>  private void drawGesture(GC gc) {
>    gc.setAdvanced(true);
>    gc.setClipping(0, 0, 575, 350);
>    org.eclipse.swt.graphics.Rectangle mouseRect = new org.eclipse.swt.graphics.Rectangle(
>        Math.min(xEnd, xStart), Math.min(yEnd, yStart),
>        Math.abs(xEnd - xStart), Math.abs(yEnd - yStart));
>
>    // draw gesture rectangle
>    gc.setAlpha(192);
>    gc.setBackground(new Color(canvas.getDisplay(), 240, 240, 240));
>    gc.setForeground(new Color(canvas.getDisplay(), 64, 64, 64));
>    gc.fillRectangle(mouseRect);
>    gc.drawRectangle(mouseRect);
>  }
>
>}

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Attachments on bug 160904: 51963 | 51965 | 51966 | 52347 | 224200