Gesture example code

1 files changed, 73 insertions, 1 deletions

diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet353.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet353.java
index f44d19ee5a..ab2ec65e4f 100644
--- a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet353.java
+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet353.java
@@ -18,13 +18,85 @@ package org.eclipse.swt.snippets;
  * 
  * @since 3.7
  */ 
+import org.eclipse.swt.*;
+import org.eclipse.swt.events.*;
+import org.eclipse.swt.graphics.*;
 import org.eclipse.swt.widgets.*;
 
 public class Snippet353 {
 
+	static Point origin, size;
+	static double rotation, currentRotation;
+	static float magnification = 1.0f, currentMagnification;
+
 	public static void main(String [] args) {
 		Display display = new Display();
-		Shell shell = new Shell(display);
+		final Shell shell = new Shell(display);
+
+		GestureListener gl = new GestureListener() {
+			public void gesture(GestureEvent ge) {
+				if (ge.detail == SWT.GESTURE_BEGIN) {
+					currentRotation = rotation;
+					currentMagnification = magnification;
+				}
+
+				if (ge.detail == SWT.GESTURE_ROTATE) {
+					rotation = currentRotation - ge.rotation;
+					shell.redraw();
+				}
+				
+				if (ge.detail == SWT.GESTURE_MAGNIFY) {
+					magnification = (float) (currentMagnification * ge.magnification);
+					shell.redraw();
+				}
+
+				if (ge.detail == SWT.GESTURE_SWIPE) {
+					// xDirection and yDirection indicate direction for GESTURE_SWIPE.
+					// For this example, just move in that direction to demonstrate it's working.
+					origin.x += ge.xDirection * 50;
+					origin.y += ge.yDirection * 50;
+					shell.redraw();
+				}
+
+				if (ge.detail == SWT.GESTURE_PAN) {
+					origin.x += ge.xDirection;
+					origin.y += ge.yDirection;
+					shell.redraw();
+				}
+				
+				if (ge.detail == SWT.GESTURE_END) {
+					
+				}		
+			}
+		};
+
+		PaintListener pl = new PaintListener() {
+			public void paintControl(PaintEvent e) {
+				Transform t = new Transform(Display.getCurrent());
+				t.translate(origin.x, origin.y);
+				t.translate(size.x / 2, size.y / 2);
+				t.rotate((float) rotation);
+				t.translate(-size.x / 2, -size.y / 2);
+				t.translate(-origin.x, -origin.y);
+				e.gc.setAntialias(SWT.ON);
+				e.gc.setTransform(t);
+				
+				// Because of bug 253670, drawRectangle is incorrect when the rotation is near 45, 135, 225 or 315 degrees.
+				// Uncomment this next line and adjust the bitfield for your platform. See GC#DRAW_OFFSET.
+				//e.gc.getGCData().state |= 1 << 9;
+				
+				e.gc.drawRectangle(origin.x, origin.y, (int)(size.x * magnification), (int)(size.y * magnification));
+				t.dispose();
+			}
+		};
+		
+		shell.addPaintListener(pl);
+		shell.addGestureListener(gl);
+		shell.setSize(400, 400);
+		size = new Point(50, 50);
+		origin = new Point((shell.getSize().x - size.x) / 2, (shell.getSize().y - size.y) / 2);
+		shell.open();
+
 		while (!shell.isDisposed()) {
 			if (!display.readAndDispatch()) display.sleep();
 		}