Some progress on this native drag-n-drop issue:
Drag-n-drop working only once, then failing on subsequent tries, only fails
due to a dead event when you delegate to your UiRenderer (native DnD, in
DevMode, using GWT 2.5.1, in an AbstractCell).
Fails after first time:
@Override
public void onBrowserEvent( Context context, Element parent, TaskProxy value,
NativeEvent event, ValueUpdater<TaskProxy> valueUpdater ) {
renderer.onBrowserEvent( this, event, parent, context );
}
@UiHandler("root")
void onDragStart( DragStartEvent event, Element parent, Context context ) {
event.setData( "text", String.valueOf( context.getIndex() ) );
event.getDataTransfer().setDragImage( parent, 25, 15 );
}
If you replace the delegation to ‘renderer’ with code that sets the data to
transfer directly on the NativeEvent, everything works great:
@Override
public void onBrowserEvent( Context context, Element parent, TaskProxy value,
NativeEvent event, ValueUpdater<TaskProxy> valueUpdater ) {
// TODO - Add check to ensure event came from "root."
if ( DRAGSTART.equals( event.getType() ) ) {
DataTransfer dataTransfer = event.getDataTransfer();
dataTransfer.setData( "text", String.valueOf( context.getIndex() ) );
dataTransfer.setDragImage( parent, 25, 15 );
}
}
I only found out after getting it working, that this is how
DesktopTaskEditView originally worked before UiRenderer came along:
https://code.google.com/p/google-web-toolkit/source/browse/trunk/samples/mobilewebapp/src/main/com/google/gwt/sample/mobilewebapp/client/desktop/DesktopTaskEditView.java?spec=svn10138&r=10138
Enrique
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