How to implement zoom on double Click in javafx?

Question

How to implement dbl Click on javafx?

I have a scene(with many components) and I want to make it drag able as well as double clickable to zoom in. How can I achieve this dynamic behavior? I have used the given solution but they are not helpful When I drag two time then the the double click event get triggers. That I don't want.

A bit of sample code will be appreciated.

@Adam The problem is mouse released event which is called on both situation. So how to identify in release that it is double clicked released or single clicked release. — P. Pandey, Feb 11 '16 at 11:48
Have you tried checking if the mouse event is a DRAG_DETECTED event before checking for the double click? — Miles, Feb 11 '16 at 12:09
@Miles it seems to work I will update with final code once done. — P. Pandey, Feb 11 '16 at 12:29
@AdamKortylewicz how it can be duplicate. just becoz it contains dbl click. — P. Pandey, Feb 11 '16 at 13:33

score 0 · Accepted Answer · answered Feb 11 '16 at 12:28

You can add a wait time, before the drag of the single click gets initiated.

Boolean that specifies if double click happened
On drag / drop: set boolean to false
On drag / drop: wait specified milliseconds before checking the boolean
On drag / drop: check if boolean false -> proceed
Double click: set boolean true

That should work?

Edit: On drag / drop: wait specified milliseconds before checking the boolean - That is basically the delay that you define as a double click still being a double click and not two separate clicks

Edit2: Mile's comment to the question seems a better way to go in this case.

your answer is near to achieve what I want but not completely. the best part is to detect and manage mouse release event based on dragged, clicked and time span between two clicks if its not dragged. — P. Pandey, Feb 11 '16 at 13:30

score 0 · Answer 2 · answered Feb 11 '16 at 13:06

Try this code for double click.

  myPane.setOnMouseClicked(new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent mouseEvent) {
            if(mouseEvent.getButton().equals(MouseButton.PRIMARY)){
                if(mouseEvent.getClickCount() == 2){
                    //Write zooming logic here.
                }
            }
        }
    });

I hope it will help you.

How to implement zoom on double Click in javafx?

2 Answers2