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-rw-r--r--tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug531882_TreeColIconPacking.java112
1 files changed, 112 insertions, 0 deletions
diff --git a/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug531882_TreeColIconPacking.java b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug531882_TreeColIconPacking.java
new file mode 100644
index 0000000000..09a4bd70ff
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug531882_TreeColIconPacking.java
@@ -0,0 +1,112 @@
+/*******************************************************************************
+ * 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;
+
+/*
+ * Tree example snippet: draw images on right side of tree item
+ *
+ * For more info on custom-drawing TreeItem and TreeItem content see
+ * http://www.eclipse.org/articles/article.php?file=Article-CustomDrawingTableAndTreeItems/index.html
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ *
+ * @since 3.2
+ */
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeColumn;
+import org.eclipse.swt.widgets.TreeItem;
+
+public class Bug531882_TreeColIconPacking {
+
+public static void main(String [] args) {
+ Display display = new Display();
+ final Image image = display.getSystemImage(SWT.ICON_INFORMATION);
+ Shell shell = new Shell(display);
+
+ shell.setText("Images on the right side of the TreeItem");
+ shell.setLayout(new FillLayout ());
+
+ Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION);
+ tree.setHeaderVisible(true);
+ tree.setLinesVisible(true);
+
+ int columnCount = 3;
+ for (int i=0; i<columnCount; i++) {
+ TreeColumn column = new TreeColumn(tree, SWT.NONE);
+ column.setText("Column " + i);
+ }
+
+ int itemCount = 4;
+ for(int i = 0; i < itemCount; i++) {
+ TreeItem item = new TreeItem(tree, SWT.NONE);
+ item.setText(new String[] {"item "+i+" a", "item "+i+" b", "item "+i+" c"});
+ for (int j = 0; j < itemCount; j++) {
+ TreeItem subItem = new TreeItem(item, SWT.NONE);
+ subItem.setText(new String[] {"sub-item " + j + " a", "sub-item " + j + " b", "sub-item " + j + " c"});
+ for (int k = 0; k < itemCount; k++) {
+ TreeItem kItem = new TreeItem(subItem, SWT.NONE);
+ kItem.setText(new String[] {"sub-sub-item "+k+" a", "sub-sub-item "+k+" b", "sub-sub-item "+k+" c"});
+ }
+ }
+ }
+
+ /*
+ * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
+ * Therefore, it is critical for performance that these methods be
+ * as efficient as possible.
+ */
+ Listener paintListener = event -> {
+ switch(event.type) {
+ case SWT.MeasureItem: {
+ Rectangle rect1 = image.getBounds();
+ event.width += rect1.width;
+ event.height = Math.max(event.height, rect1.height + 2);
+ break;
+ }
+ case SWT.PaintItem: {
+ int x = event.x + event.width;
+ Rectangle rect2 = image.getBounds();
+ int offset = Math.max(0, (event.height - rect2.height) / 2);
+ event.gc.drawImage(image, x, event.y + offset);
+ break;
+ }
+ }
+ };
+ tree.addListener(SWT.MeasureItem, paintListener);
+ tree.addListener(SWT.PaintItem, paintListener);
+
+ tree.setVisible(true);
+
+ for(int i = 0; i < columnCount; i++) {
+ tree.getColumn(i).pack();
+ }
+
+// for(int i = 0; i < columnCount; i++) {
+// tree.getColumn(i).pack();
+// }
+
+ shell.setSize(500, 200);
+ shell.open();
+ while(!shell.isDisposed ()) {
+ if(!display.readAndDispatch()) display.sleep();
+ }
+ if(image != null) image.dispose();
+ display.dispose();
+}
+}

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