Bug 552215 - Better test snippets for 541427

Change-Id: I4a71479fece2220ad9114473e6ac6913e630e9bd
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug541427_TreeNoHeader.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug541427_TreeNoHeader.java
new file mode 100644
index 0000000000..9b2bf356a2
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug541427_TreeNoHeader.java
@@ -0,0 +1,83 @@
+/*******************************************************************************
+ * Copyright (c) 2018 Matthew Khouzam and others. All rights reserved.
+ * The contents of this file are made available under the terms
+ * of the GNU Lesser General Public License (LGPL) Version 2.1 that
+ * accompanies this distribution (lgpl-v21.txt).  The LGPL is also
+ * available at http://www.gnu.org/licenses/lgpl.html.  If the version
+ * of the LGPL at http://www.gnu.org is different to the version of
+ * the LGPL accompanying this distribution and there is any conflict
+ * between the two license versions, the terms of the LGPL accompanying
+ * this distribution shall govern.
+ *
+ * Contributors:
+ *     Matthew Khouzam - initial API and implementation
+ *     Syntevo         - more tests
+ *******************************************************************************/
+package org.eclipse.swt.tests.gtk.snippets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.RowLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Group;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeColumn;
+
+public class Bug541427_TreeNoHeader {
+	public static void main(String[] args) {
+		// boilerplate
+		Display display = new Display();
+		Shell shell = new Shell(display);
+		shell.setLayout(new RowLayout(SWT.HORIZONTAL));
+
+		for (int iTests = 0; iTests < (1 << 2); iTests++)
+		{
+			final boolean USE_NO_SCROLL    = (iTests & (1 << 0)) != 0;
+			final boolean PACK_BEFORE_SIZE = (iTests & (1 << 1)) != 0;
+
+			Composite testComposite = new Composite(shell, 0);
+			testComposite.setLayout(new RowLayout(SWT.VERTICAL));
+
+			for (int iHeightDiff = -5; iHeightDiff <= 5; iHeightDiff++)
+			{
+				Group group = new Group(testComposite, 0);
+				group.setText(String.format(
+						"%+d   %c%c",
+						iHeightDiff,
+						USE_NO_SCROLL    ? 'N' : '_',
+						PACK_BEFORE_SIZE ? 'P' : '_'
+				));
+
+				final Tree tree = new Tree(group, USE_NO_SCROLL ? SWT.NO_SCROLL : 0);
+				tree.setHeaderVisible(true);
+
+				// Remember header height before creating columns.
+				// It returns 0 after a column is created, is that another bug?
+				int treeH = tree.getHeaderHeight() + iHeightDiff;
+
+				// some columns. 1 is already enough to demonstrate
+				for (int iColumn = 0; iColumn < 3; iColumn++)
+				{
+					TreeColumn column = new TreeColumn(tree, SWT.NONE);
+					column.setText("Column");
+					column.setWidth(70);
+				}
+
+				if (PACK_BEFORE_SIZE)
+					tree.pack();
+
+				tree.setBounds(0, 0, 220, treeH);
+			}
+		}
+
+		// boilerplate
+		shell.pack();
+		shell.open();
+		while (!shell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+		display.dispose();
+	}
+}
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