Attachment 257901 Details for Bug 482022 – Example Program highlighting the problem.

Example Program highlighting the problem.

MouseEnter.java (text/plain), 2.39 KB, created by DaveLaw

on 2015-11-12 10:43:59 EST

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Filename:

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Creator: DaveLaw

Created: 2015-11-12 10:43:59 EST

Size: 2.39 KB

patch

obsolete

>package org.eclipse.swt.snippets;
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.MouseEvent;
>import org.eclipse.swt.events.MouseTrackAdapter;
>import org.eclipse.swt.events.PaintEvent;
>import org.eclipse.swt.events.PaintListener;
>import org.eclipse.swt.graphics.Color;
>import org.eclipse.swt.widgets.Canvas;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Control;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Shell;
>
>public class MouseEnter {
>
>	private static final class MouseCanvas extends Canvas {
>
>		public MouseCanvas(final Composite parent, final int canvasNumber, final Color colour) {
>			super(parent, SWT.NONE);
>
>			final Control thisCanvas   = this;
>			final int     gap          =  10;
>			final int     canvasWidth  = 120;
>			final int     canvasHeight =  60;
>
>			this.setBounds(canvasNumber * (gap + canvasWidth), 0, canvasWidth, canvasHeight + gap*2);
>
>			this.addPaintListener(new PaintListener() {
>				public void paintControl(PaintEvent e) {
>					e.gc.setBackground(colour);
>					e.gc.fillRectangle(0, 0, thisCanvas.getBounds().width, thisCanvas.getBounds().height);
>				}
>			});
>
>			this.setToolTipText("Canvas " + canvasNumber);
>
>			this.addMouseTrackListener(new MouseTrackAdapter() {
>				@Override
>				public void mouseEnter(MouseEvent e) {
>					thisCanvas.setCursor(Display.getDefault().getSystemCursor(SWT.CURSOR_HAND));
>					System.out.println("Mouse Enter.: " + Integer.toHexString(e.getSource().hashCode()) + "\t" + e);
>				}
>				@Override
>				public void mouseExit(MouseEvent e) {
>					thisCanvas.setCursor(Display.getDefault().getSystemCursor(SWT.CURSOR_ARROW));
>					System.out.println("Mouse Exit..: " + Integer.toHexString(e.getSource().hashCode()) + "\t" + e);
>				}
>			});
>		}
>	}
>
>	public static void main(String[] args) {
>
>		final Display display = new Display();
>		final Shell   shell   = new Shell(display, SWT.SHELL_TRIM & (~SWT.RESIZE) & (~SWT.MAX));
>
>		new MouseCanvas(shell, 0, Display.getDefault().getSystemColor(SWT.COLOR_RED));
>		new MouseCanvas(shell, 1, Display.getDefault().getSystemColor(SWT.COLOR_GREEN));
>		new MouseCanvas(shell, 2, Display.getDefault().getSystemColor(SWT.COLOR_BLUE));
>
>		shell.pack();
>		shell.open();
>		while  (shell  .isDisposed()      == false) {
>			if (display.readAndDispatch() == false) {
>				display.sleep();
>			}
>		}
>		display.dispose();
>	}
>}

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Attachments on bug 482022: 257901 | 257920 | 257942 | 278689