From 6186fb3eb3c00dde36a5ef7b90a15abcb46b5dcf Mon Sep 17 00:00:00 2001
From: Eric Williams
Date: Tue, 3 Apr 2018 13:50:54 -0400
Subject: Bug 529431: [GTK3.10+] Snippet294 fails to draw Region

Allow GtkWindow (usually Shells) to be shaped using
gdk_window_shape_combine_region() instead of cairo_clip. GtkWindow
is unaffected by the changes in GTK3.10 so this is fine.

A snippet has been added to test this functionality, and to test for the
case mentioned in comment 8 of bug 529431.

Change-Id: I40c80599e015553576fc8979181577c1170146d2
Signed-off-by: Eric Williams <ericwill@redhat.com>---
 .../gtk/snippets/Bug529431_ShellSetRegion.java     | 67 ++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug529431_ShellSetRegion.java

(limited to 'tests')

diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug529431_ShellSetRegion.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug529431_ShellSetRegion.java
new file mode 100644
index 0000000000..65b0f428eb
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug529431_ShellSetRegion.java
@@ -0,0 +1,67 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Red Hat 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:
+ *     Red Hat - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.tests.gtk.snippets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Region;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+
+/*
+ * Title: Bug 529431: [GTK3.10+] Snippet294 fails to draw Region
+ * How to run: launch snippet and look for the resulting Shell
+ * Bug description: the Shell is a 200 x 200 square with no region set
+ * Expected results: the Shell is circle with inner circular regions
+ * GTK Version(s): GTK3.10+
+ */
+public class Bug529431_ShellSetRegion {
+
+	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, SWT.NO_TRIM | SWT.ON_TOP
+				| SWT.NO_FOCUS | SWT.TOOL);
+
+		shell.setSize(200,200);
+
+		// define a region that looks like a circle with two holes in it
+		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 shell using setRegion
+		shell.setRegion(region);
+		shell.open();
+
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		region.dispose();
+		display.dispose();
+	}
+
+}
-- 
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