1 files changed, 89 insertions, 0 deletions
diff --git a/uitest/src/com/vaadin/tests/dd/VMyDragSource.java b/uitest/src/com/vaadin/tests/dd/VMyDragSource.java
new file mode 100644
index 0000000000..8cca6d6459
--- /dev/null
+++ b/uitest/src/com/vaadin/tests/dd/VMyDragSource.java
@@ -0,0 +1,89 @@
+package com.vaadin.tests.dd;
+
+import com.google.gwt.dom.client.NativeEvent;
+import com.google.gwt.event.dom.client.MouseDownEvent;
+import com.google.gwt.event.dom.client.MouseDownHandler;
+import com.google.gwt.event.dom.client.MouseMoveEvent;
+import com.google.gwt.event.dom.client.MouseMoveHandler;
+import com.google.gwt.event.dom.client.MouseOutEvent;
+import com.google.gwt.event.dom.client.MouseOutHandler;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.FlowPanel;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.Widget;
+import com.vaadin.client.ui.dd.VDragAndDropManager;
+import com.vaadin.client.ui.dd.VTransferable;
+
+/**
+ * Example code to implement Component that has something to drag.
+ */
+public class VMyDragSource extends Composite implements MouseDownHandler,
+        MouseMoveHandler, MouseOutHandler {
+
+    private boolean mouseDown;
+    private MouseDownEvent mDownEvent;
+
+    @SuppressWarnings("unused")
+    public VMyDragSource() {
+        FlowPanel fp = new FlowPanel();
+        initWidget(fp);
+
+        HTML html = new HTML("DragThis");
+
+        fp.add(html);
+
+        html.addMouseDownHandler(this);
+        html.addMouseMoveHandler(this);
+        html.addMouseOutHandler(this);
+
+    }
+
+    /*
+     * Below a sophisticated drag start implementation. Drag event is started if
+     * mouse is moved 5 pixels with left mouse key down.
+     */
+
+    @Override
+    public void onMouseDown(MouseDownEvent event) {
+        if (event.getNativeButton() == NativeEvent.BUTTON_LEFT) {
+            mouseDown = true;
+            mDownEvent = event;
+        }
+    }
+
+    @Override
+    public void onMouseMove(MouseMoveEvent event) {
+        if (mouseDown) {
+            int deltaX = Math.abs(mDownEvent.getClientX() - event.getClientX());
+            int deltaY = Math.abs(mDownEvent.getClientY() - event.getClientY());
+            if (deltaX > 5 || deltaY > 5) {
+                // Start the drag and drop operation
+
+                // create Transferable, that contains the payload
+                VTransferable transferable = new VTransferable();
+                transferable.setData("Text", "myPayload");
+
+                // Tell DragAndDropManager to start a drag and drop operation.
+                // Also let it handle all events (last parameter true). Could
+                // also do all event handling here too.
+                VDragAndDropManager.get().startDrag(transferable,
+                        mDownEvent.getNativeEvent(), true);
+
+                mouseDown = false;
+                mDownEvent = null;
+            }
+        }
+
+    }
+
+    @Override
+    public void onMouseOut(MouseOutEvent event) {
+        mouseDown = false;
+        mDownEvent = null;
+    }
+
+    public Widget getWidgetForPaintable() {
+        return this;
+    }
+
+}