drag & drop with control key

Vaadin 6 / 7 / 8 Framework UI
1

Is it possible to find out if some key is pressed during dragging in vaadin? I would like if user could copy item by dragging with pressed Ctrl.

2

Hello Adam,

Assuming you are using DragAndDropWrapper as your drop target, you could try something like this in your DropHandler implementation:

MyDropHandler implements DropHandler{
    public void drop(DragAndDropEvent event){
        WrapperTargetDetails targetDetails=(WrapperTargetDetails) event.getTargetDetails();
        MouseEventDetails mouseEvent=targetDetails.getMouseEvent();
        if(mouseEvent.isCtrlKey())....
    }
}

-Matti

3

Hello Matti,

Thanks for your answer, but I am dropping on tree and TreeTargetDetails don’t have method getMouseEvent(). I found this ticket http://dev.vaadin.com/ticket/13416#no1 so I guess it’s not possible now, or is there any workaround?

4

Try this

MouseEventDetails.deSerialize((String) treeTargetDetails.getData("mouseEvent"));

-Matti

5

This works, thank you.