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Port of all canvas snippets
author Bill Baxter <bill@billbaxter.com>
date Tue, 20 May 2008 12:10:54 +0900
parents cbba80cceb7a
children 961ca8a76cad 37fab5543b9a
files snippets/canvas/Snippet21.d snippets/canvas/Snippet245.d snippets/canvas/Snippet275.d snippets/canvas/Snippet290.d snippets/canvas/Snippet48.d snippets/dsss.conf
diffstat 6 files changed, 406 insertions(+), 0 deletions(-) [+]
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line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet21.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,100 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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 snippets.canvas.Snippet21;
+
+/*
+ * Canvas example snippet: implement tab traversal (behave like a tab group)
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+import dwt.DWT;
+import dwt.graphics.Color;
+import dwt.widgets.Display;
+import dwt.widgets.Shell;
+import dwt.widgets.Listener;
+import dwt.widgets.Event;
+import dwt.widgets.Button;
+import dwt.widgets.Text;
+import dwt.widgets.Canvas;
+
+import tango.io.Stdout;
+
+import dwt.dwthelper.utils;
+
+void main () {
+	Display display = new Display ();
+	final Color red = display.getSystemColor (DWT.COLOR_RED);
+	final Color blue = display.getSystemColor (DWT.COLOR_BLUE);
+	Shell shell = new Shell (display);
+	Button b = new Button (shell, DWT.PUSH);
+	b.setBounds (10, 10, 100, 32);
+	b.setText ("Button");
+	shell.setDefaultButton (b);
+	final Canvas c = new Canvas (shell, DWT.BORDER);
+	c.setBounds (10, 50, 100, 32);
+
+    void onTraverse(Event e, Canvas c) {
+        switch (e.detail) {
+            /* Do tab group traversal */
+        case DWT.TRAVERSE_ESCAPE:
+        case DWT.TRAVERSE_RETURN:
+        case DWT.TRAVERSE_TAB_NEXT:	
+        case DWT.TRAVERSE_TAB_PREVIOUS:
+        case DWT.TRAVERSE_PAGE_NEXT:	
+        case DWT.TRAVERSE_PAGE_PREVIOUS:
+            e.doit = true;
+            break;
+        }
+    }
+
+    void onFocusIn(Event e, Canvas c) {
+        c.setBackground (red);
+    }
+
+    void onFocusOut(Event e, Canvas c) {
+        c.setBackground (blue);
+    }
+
+    void onKeyDown (Event e, Canvas c) {
+        Stdout("KEY").newline;
+        for (int i=0; i<64; i++) {
+            Color c1 = red, c2 = blue;
+            if (c.isFocusControl ()) {
+                c1 = blue;  c2 = red;
+            }
+            c.setBackground (c1);
+            c.update ();
+            c.setBackground (c2);
+        }
+    }
+
+	c.addListener (DWT.Traverse, dgListener(&onTraverse, c));
+	c.addListener (DWT.FocusIn, dgListener(&onFocusIn, c));
+	c.addListener (DWT.FocusOut, dgListener(&onFocusOut, c));
+	c.addListener (DWT.KeyDown, dgListener(&onKeyDown, c));
+
+	Text t = new Text (shell, DWT.SINGLE | DWT.BORDER);
+	t.setBounds (10, 85, 100, 32);
+
+	Text r = new Text (shell, DWT.MULTI | DWT.BORDER);
+	r.setBounds (10, 120, 100, 32);
+	
+	c.setFocus ();
+	shell.setSize (200, 200);
+	shell.open ();
+	while (!shell.isDisposed()) {
+		if (!display.readAndDispatch ()) display.sleep ();
+	}
+	display.dispose ();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet245.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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 snippets.canvas.Snippet245;
+
+/* 
+ * Canvas snippet: paint a circle in a canvas
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+
+import dwt.graphics.Rectangle;
+import dwt.widgets.Display;
+import dwt.widgets.Shell;
+import dwt.events.PaintListener;
+import dwt.events.PaintEvent;
+
+void main() 
+{
+	final Display display = new Display();
+	final Shell shell = new Shell(display);
+	shell.addPaintListener(new class(shell) PaintListener {
+        Shell shell;
+        this(Shell s) { this.shell = s; }
+        public void paintControl(PaintEvent event) {
+            Rectangle rect = shell.getClientArea();
+            event.gc.drawOval(0, 0, rect.width - 1, rect.height - 1);
+        }
+    });
+	shell.setBounds(10, 10, 200, 200);
+	shell.open ();
+	while (!shell.isDisposed()) {
+		if (!display.readAndDispatch()) display.sleep();
+	}
+	display.dispose();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet275.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * 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 snippets.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 ();
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet290.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,49 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 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 snippets.canvas.Snippet290;
+
+/* 
+ * Canvas snippet: ignore 2nd mouse up event after double-click
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+
+import dwt.widgets.Display;
+import dwt.widgets.Shell;
+import dwt.events.MouseEvent;
+import dwt.events.MouseAdapter;
+
+import tango.io.Stdout;
+
+void main() {
+	final Display display = new Display();
+	final Shell shell = new Shell(display);
+	shell.addMouseListener(new class MouseAdapter {
+		public void mouseUp(MouseEvent e) {
+			if (e.count == 1) {
+				Stdout("Mouse up").newline;
+			}
+		}
+		public void mouseDoubleClick(MouseEvent e) {
+            Stdout("Double-click").newline;
+		}
+	});
+	shell.setBounds(10, 10, 200, 200);
+	shell.open ();
+	while (!shell.isDisposed()) {
+		if (!display.readAndDispatch()) display.sleep();
+	}
+	display.dispose();
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet48.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,129 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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 snippets.canvas.Snippet48;
+ 
+/*
+ * Canvas example snippet: scroll an image (flicker free, no double buffering)
+ *
+ * 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.Point;
+import dwt.graphics.Rectangle;
+import dwt.graphics.Color;
+import dwt.graphics.Image;
+import dwt.layout.FillLayout;
+import dwt.widgets.Display;
+import dwt.widgets.Shell;
+import dwt.widgets.Event;
+import dwt.widgets.Listener;
+import dwt.widgets.FileDialog;
+import dwt.widgets.Canvas;
+import dwt.widgets.ScrollBar;
+import dwt.layout.FillLayout;
+
+import dwt.dwthelper.utils;
+
+void main () {
+	Display display = new Display ();
+	Shell shell = new Shell (display);
+	shell.setLayout(new FillLayout());
+	Image originalImage = null;
+	FileDialog dialog = new FileDialog (shell, DWT.OPEN);
+	dialog.setText ("Open an image file or cancel");
+	String string = dialog.open ();
+	if (string !is null) {
+		originalImage = new Image (display, string);
+	}
+	if (originalImage is null) {
+		int width = 150, height = 200;
+		originalImage = new Image (display, width, height);
+		GC gc = new GC (originalImage);
+		gc.fillRectangle (0, 0, width, height);
+		gc.drawLine (0, 0, width, height);
+		gc.drawLine (0, height, width, 0);
+		gc.drawText ("Default Image", 10, 10);
+		gc.dispose ();
+	}
+	final Image image = originalImage;
+	final Point origin = new Point (0, 0);
+	final Canvas canvas = new Canvas (shell, DWT.NO_BACKGROUND |
+			DWT.NO_REDRAW_RESIZE | DWT.V_SCROLL | DWT.H_SCROLL);
+	final ScrollBar hBar = canvas.getHorizontalBar ();
+    void onHBarSelection (Event e) {
+        int hSelection = hBar.getSelection ();
+        int destX = -hSelection - origin.x;
+        Rectangle rect = image.getBounds ();
+        canvas.scroll (destX, 0, 0, 0, rect.width, rect.height, false);
+        origin.x = -hSelection;
+    }
+	final ScrollBar vBar = canvas.getVerticalBar ();
+    void onVBarSelection(Event e) {
+        int vSelection = vBar.getSelection ();
+        int destY = -vSelection - origin.y;
+        Rectangle rect = image.getBounds ();
+        canvas.scroll (0, destY, 0, 0, rect.width, rect.height, false);
+        origin.y = -vSelection;
+    }
+    void onResize(Event e) {
+        Rectangle rect = image.getBounds ();
+        Rectangle client = canvas.getClientArea ();
+        hBar.setMaximum (rect.width);
+        vBar.setMaximum (rect.height);
+        hBar.setThumb (Math.min (rect.width, client.width));
+        vBar.setThumb (Math.min (rect.height, client.height));
+        int hPage = rect.width - client.width;
+        int vPage = rect.height - client.height;
+        int hSelection = hBar.getSelection ();
+        int vSelection = vBar.getSelection ();
+        if (hSelection >= hPage) {
+            if (hPage <= 0) hSelection = 0;
+            origin.x = -hSelection;
+        }
+        if (vSelection >= vPage) {
+            if (vPage <= 0) vSelection = 0;
+            origin.y = -vSelection;
+        }
+        canvas.redraw ();
+    }
+    void onPaint (Event e) {
+        GC gc = e.gc;
+        gc.drawImage (image, origin.x, origin.y);
+        Rectangle rect = image.getBounds ();
+        Rectangle client = canvas.getClientArea ();
+        int marginWidth = client.width - rect.width;
+        if (marginWidth > 0) {
+            gc.fillRectangle (rect.width, 0, marginWidth, client.height);
+        }
+        int marginHeight = client.height - rect.height;
+        if (marginHeight > 0) {
+            gc.fillRectangle (0, rect.height, client.width, marginHeight);
+        }
+    }
+
+	hBar.addListener (DWT.Selection, dgListener(&onHBarSelection));
+	vBar.addListener (DWT.Selection, dgListener(&onVBarSelection));
+	canvas.addListener (DWT.Resize,  dgListener(&onResize));
+	canvas.addListener (DWT.Paint, dgListener(&onPaint));
+
+	shell.setSize (200, 150);
+	shell.open ();
+	while (!shell.isDisposed ()) {
+		if (!display.readAndDispatch ()) display.sleep ();
+	}
+	originalImage.dispose();
+	display.dispose ();
+}
+
--- a/snippets/dsss.conf	Mon May 19 23:42:48 2008 +0900
+++ b/snippets/dsss.conf	Tue May 20 12:10:54 2008 +0900
@@ -17,6 +17,11 @@
 
 
 [button/Snippet293.d]
+[canvas/Snippet21.d]
+[canvas/Snippet48.d]
+[canvas/Snippet245.d]
+[canvas/Snippet275.d]
+[canvas/Snippet290.d]
 [control/Snippet25.d]
 [control/Snippet62.d]
 [combo/Snippet26.d]