Bug 537713: [GTK3] Combo sizing problems

Do not perform resize calculations for Combos, as their large minimum
and/or natural sizes causes API breakages with setBounds().

Tested with the snippets from this bug and bug 535323,
AllNonBrowserTests, and the IDE: no allocation warnings occur.

Change-Id: Ieefa0752fcb2dd3a743ebcc432eef939a46b73f4
Signed-off-by: Eric Williams <ericwill@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug537713_ComboSizing.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug537713_ComboSizing.java
new file mode 100644
index 0000000000..dcf28eff3b
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug537713_ComboSizing.java
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * 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.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Combo;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+
+public class Bug537713_ComboSizing {
+
+	public static void main(String[] args) {
+		Display display = new Display();
+		Shell shell = new Shell(display);
+		Rectangle clientArea = shell.getClientArea();
+		Combo combo1 = new Combo(shell, SWT.BORDER);
+		combo1.setItems("Alpha", "Bravo", "Charlie");
+		Point prefSize = combo1.computeSize(SWT.DEFAULT, SWT.DEFAULT);
+		combo1.setBounds(clientArea.x, clientArea.y, prefSize.x, prefSize.y);
+		Combo combo2 = new Combo(shell, SWT.BORDER);
+		combo2.setItems("Alpha", "Bravo", "Charlie");
+		combo2.setBounds(clientArea.x, clientArea.y + prefSize.y, (prefSize.x / 2) - 20, prefSize.y);
+		Combo combo3 = new Combo(shell, SWT.BORDER);
+		combo3.setItems("Alpha", "Bravo", "Charlie");
+		combo3.setBounds(clientArea.x, clientArea.y + prefSize.y * 2, (prefSize.x / 2) + 1, prefSize.y);
+		shell.pack();
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+
+}
\ No newline at end of file