As an attachment the project. Uses a regular Table but TreeTable should work similarly. I had to made changes to the client-side implementation of Table (VMyScrollTable). See line 4126:
private Event event;
private Timer timer = new Timer() {
@Override
public void run() {
handleBrowserEvent(event);
}
};
/*
* React on click that occur on content cells only
*/
public void onBrowserEvent(Event event) {
if (enabled) {
int type = event.getTypeInt();
if (Event.ONMOUSEUP == type) {
this.event = event;
timer.schedule(200);
} else if (Event.ONDBLCLICK == type) {
this.event = null;
timer.cancel();
} else {
handleBrowserEvent(event);
}
}
super.onBrowserEvent(event);
}
public void handleBrowserEvent(Event event) {
In the above, click events are delayed to avoid normal click events when user does a double click actually.