Snippet 294

2 files changed, 91 insertions, 0 deletions

diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet293.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet293.java
index 299b29ed64..b4bc599264 100644
--- a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet293.java
+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet293.java
@@ -1,3 +1,13 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 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
+ *******************************************************************************/
 package org.eclipse.swt.snippets;
 
 /*
diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet294.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet294.java
new file mode 100644
index 0000000000..5d871de828
--- /dev/null
+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet294.java
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 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
+ *******************************************************************************/
+package org.eclipse.swt.snippets;
+
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.layout.*;
+import org.eclipse.swt.widgets.*;
+
+/*
+ * Region on control example: create a non-rectangular button
+ * 
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ * 
+ * @since 3.4
+ */
+
+public class Snippet294 {
+
+	static int[] circle(int r, int offsetX, int offsetY) {
+		int[] polygon = new int[8 * r + 4];
+		// x^2 + y^2 = r^2
+		for (int i = 0; i < 2 * r + 1; i++) {
+			int x = i - r;
+			int y = (int)Math.sqrt(r*r - x*x);
+			polygon[2*i] = offsetX + x;
+			polygon[2*i+1] = offsetY + y;
+			polygon[8*r - 2*i - 2] = offsetX + x;
+			polygon[8*r - 2*i - 1] = offsetY - y;
+		}
+		return polygon;
+	}
+
+	public static void main(String[] args) {
+		final Display display = new Display();
+		
+		final Shell shell = new Shell(display);
+		shell.setText("Regions on a Control");
+		shell.setLayout(new FillLayout());
+		shell.setBackground(display.getSystemColor(SWT.COLOR_DARK_RED));
+		
+		Button b2 = new Button(shell, SWT.PUSH);
+		b2.setText("Button with Regions");
+		
+		// define a region that looks like a circle with two holes in ot
+		Region region = new Region();
+		region.add(circle(67, 87, 77));
+		region.subtract(circle(20, 87, 47));
+		region.subtract(circle(20, 87, 113));
+		
+		// define the shape of the button using setRegion
+		b2.setRegion(region);
+		b2.setLocation(100,50);
+		
+		b2.addListener(SWT.Selection, new Listener() {
+			public void handleEvent(Event e) {
+				shell.close();
+			}
+		});
+		
+		shell.setSize(200,200);
+		shell.open();
+		
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		region.dispose();
+		display.dispose();
+	}
+	
+}