Bug 307441: [DND] DnD on Linux does not behave as expected with

overlapping controls

Add reproducer snippet.

Change-Id: I7d9fdd85995fad36ba13344b1706c10f01ca9a7d
Signed-off-by: Eric Williams <ericwill@redhat.com>

1 files changed, 180 insertions, 0 deletions

diff --git a/tests/org.eclipse.swt.tests.gtk/Bug Snippets/org/eclipse/swt/tests/gtk/snippets/Bug307441_DnDOverlappingControls.java b/tests/org.eclipse.swt.tests.gtk/Bug Snippets/org/eclipse/swt/tests/gtk/snippets/Bug307441_DnDOverlappingControls.java
new file mode 100644
index 0000000000..3cb08b254f
--- /dev/null
+++ b/tests/org.eclipse.swt.tests.gtk/Bug Snippets/org/eclipse/swt/tests/gtk/snippets/Bug307441_DnDOverlappingControls.java
@@ -0,0 +1,180 @@
+package org.eclipse.swt.tests.gtk.snippets;
+
+/*
+ * Drag and Drop example snippet: drag a URL between two labels.
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.dnd.DND;
+import org.eclipse.swt.dnd.DragSource;
+import org.eclipse.swt.dnd.DragSourceEvent;
+import org.eclipse.swt.dnd.DragSourceListener;
+import org.eclipse.swt.dnd.DropTarget;
+import org.eclipse.swt.dnd.DropTargetEvent;
+import org.eclipse.swt.dnd.DropTargetListener;
+import org.eclipse.swt.dnd.Transfer;
+import org.eclipse.swt.dnd.URLTransfer;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+
+/*
+ * Title: Bug 307441 - [DND] DnD on Linux does not behave as expected with overlapping controls
+ * How to run: launch snippet and drag controls from left side to right, watch console for print statements
+ * Bug description: Improper events for overlapped controls
+ * Expected results: All events should be fired correctly
+ * GTK Version(s): all
+ */
+public class Bug307441_DnDOverlappingControls {
+
+public static void main (String [] args) {
+
+	Display display = new Display ();
+	final Shell shell = new Shell (display);
+	shell.setText("URLTransfer");
+	shell.setLayout(new FillLayout());
+	final Label label1 = new Label (shell, SWT.BORDER);
+	label1.setText ("http://www.eclipse.org");
+
+	final Composite dropComp = new Composite(shell, SWT.BORDER);
+	dropComp.setSize(600,300);
+	Rectangle clientArea = dropComp.getClientArea();
+
+	final Label label2 = new Label (dropComp, SWT.BORDER);
+	label2.setBackground(new Color(null,255,255,0));
+	label2.setText("DropLabel1");
+	label2.setSize(100,100);
+	label2.setBounds(clientArea.x, clientArea.y, clientArea.width, (clientArea.height*2)/3);
+
+	final Label label3 = new Label (dropComp, SWT.BORDER);
+	label3.setBackground(new Color(null, 255, 0,0));
+	label3.setText("DropLabel2");
+	label3.setSize(100,100);
+	label3.setBounds(clientArea.x+10, clientArea.y+clientArea.height/3, clientArea.width-10, clientArea.height/2);
+	label3.moveAbove(label2);
+
+	setDragSource (label1);
+	setDropTarget (dropComp);
+	setDropTargetForLabel (label2);
+	setDropTargetForLabel (label3);
+
+	shell.setSize(900, 300);
+	shell.open ();
+	while (!shell.isDisposed ()) {
+		if (!display.readAndDispatch ()) display.sleep ();
+	}
+	display.dispose ();
+}
+
+public static void setDragSource (final Label label) {
+	int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
+	final DragSource source = new DragSource (label, operations);
+	source.setTransfer(new Transfer[] {URLTransfer.getInstance()});
+	source.addDragListener (new DragSourceListener () {
+		@Override
+		public void dragStart(DragSourceEvent e) {
+		}
+		@Override
+		public void dragSetData(DragSourceEvent e) {
+			e.data = label.getText();
+		}
+		@Override
+		public void dragFinished(DragSourceEvent event) {
+		}
+	});
+}
+
+public static void setDropTargetForLabel (final Label control) {
+	int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
+	DropTarget target = new DropTarget(control, operations);
+	target.setTransfer(new Transfer[] {URLTransfer.getInstance()});
+	target.addDropListener (new DropTargetListener() {
+		@Override
+		public void dragEnter(DropTargetEvent e) {
+			System.out.println("dragEnter="+control.getText());
+			if (e.detail == DND.DROP_NONE)
+				e.detail = DND.DROP_LINK;
+		}
+		@Override
+		public void dragOperationChanged(DropTargetEvent e) {
+			if (e.detail == DND.DROP_NONE)
+				e.detail = DND.DROP_LINK;
+		}
+		@Override
+		public void drop(DropTargetEvent event) {
+			if (event.data == null) {
+				event.detail = DND.DROP_NONE;
+				return;
+			}
+			control.setText(((String) event.data));
+
+		}
+		@Override
+		public void dragLeave(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+			System.out.println("dragLeave="+control.getText());
+
+		}
+		@Override
+		public void dragOver(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+
+		}
+		@Override
+		public void dropAccept(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+
+		}
+	});
+}
+public static void setDropTarget (final Control control) {
+	int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
+	DropTarget target = new DropTarget(control, operations);
+	target.setTransfer(new Transfer[] {URLTransfer.getInstance()});
+	target.addDropListener (new DropTargetListener() {
+		@Override
+		public void dragEnter(DropTargetEvent e) {
+			System.out.println("dragEnter=composite");
+
+			if (e.detail == DND.DROP_NONE)
+				e.detail = DND.DROP_LINK;
+		}
+		@Override
+		public void dragOperationChanged(DropTargetEvent e) {
+			if (e.detail == DND.DROP_NONE)
+				e.detail = DND.DROP_LINK;
+		}
+		@Override
+		public void drop(DropTargetEvent event) {
+			if (event.data == null) {
+				event.detail = DND.DROP_NONE;
+				return;
+			}
+			control.setBackground(new Color(null,0,0,255));
+		}
+		@Override
+		public void dragLeave(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+			System.out.println("dragLeave=composite");
+
+		}
+		@Override
+		public void dragOver(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+
+		}
+		@Override
+		public void dropAccept(DropTargetEvent arg0) {
+			// TODO Auto-generated method stub
+
+		}
+	});
+}
+}
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