Mercurial > projects > dwt-samples
view snippets/canvas/Snippet275.d @ 179:89de7ff0752c default tip
Add JFace snippet Snippet054NativeControlsInViewers, thanks to WasserDragoon
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 29 Apr 2009 11:01:41 +0200 |
parents | 1f0a7a472680 |
children |
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/******************************************************************************* * Copyright (c) 2000, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * D Port: * Bill Baxter <wbaxter> at gmail com *******************************************************************************/ module canvas.Snippet275; /* * Canvas snippet: update a portion of a Canvas frequently * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */ import dwt.DWT; import dwt.graphics.GC; import dwt.graphics.Color; import dwt.graphics.Point; import dwt.graphics.Image; import dwt.widgets.Display; import dwt.widgets.Shell; import dwt.widgets.Event; import dwt.widgets.Listener; import dwt.widgets.Canvas; import dwt.dwthelper.System; import dwt.dwthelper.utils; import dwt.dwthelper.Runnable; import tango.util.Convert; static String value; public static void main () { final int INTERVAL = 888; final Display display = new Display (); final Image image = new Image (display, 750, 750); GC gc = new GC (image); gc.setBackground (display.getSystemColor (DWT.COLOR_RED)); gc.fillRectangle (image.getBounds ()); gc.dispose (); Shell shell = new Shell (display); shell.setBounds (10, 10, 790, 790); final Canvas canvas = new Canvas (shell, DWT.NONE); canvas.setBounds (10, 10, 750, 750); void onPaint (Event event) { value = to!(char[])(System.currentTimeMillis ()); event.gc.drawImage (image, 0, 0); event.gc.drawString (value, 10, 10, true); } canvas.addListener (DWT.Paint, dgListener(&onPaint)); display.timerExec (INTERVAL, new class Runnable { void run () { if (canvas.isDisposed ()) return; // canvas.redraw (); // <-- bad, damages more than is needed GC gc = new GC (canvas); Point extent = gc.stringExtent (value ~ '0'); gc.dispose (); canvas.redraw (10, 10, extent.x, extent.y, false); display.timerExec (INTERVAL, this); } }); shell.open (); while (!shell.isDisposed ()){ if (!display.readAndDispatch ()) display.sleep (); } image.dispose (); display.dispose (); }