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javajavafxevent-handlingtextareamouselistener
Nick
Nick

Reputation: 368

JavaFX - TextArea, how to activate the textarea only on double click?

JavaFX 2.2 - JDK 1.8.0_121

I have a TextArea inside a rectangle which also happens to have a mouse listener. The problem is that when I click on the TextArea it consumes the event and the rectangle doesn't get the click.

Consider the following code for example:

Group g = new Group();

Rectangle rect = new Rectangle(100,100);

TextArea textArea = new TextArea("Test");
textArea.setTranslateX(rect.getX());
textArea.setTranslateY(rect.getY());
textArea.setMinWidth(rect.getWidth());
textArea.setMinHeight(rect.getHeight());

//Calling a method to add an onMouseClickedProperty() mouse listener to the rectangle
addMouseListener(rect) 

g.getChildren().addAll(rect, textArea);

In the above case the TextArea takes as much space as the rectangle so when I click on it the onMouseClickedProperty() event gets consumed by the TextArea.

Is there a way to "disable" or "remove" the onMouseClickedProperty() from the TextArea and instead have it fired when a double click occurs? In hopes that the single mouse click will be consumed by the rectangle instead.

Thanks.

EDIT:

I found a solution that works, it's not perfect but it's much more appropriate than what it was discussed in the comments.

Since you can't prevent the TextArea from consuming the MOUSED_PRESSED event the only way to process an event before TextArea areas does is using event filters.

So using the example code from above where i call the method addMouseListener(rect) instead of using just a mouse listener I'm adding an event filter, and instead of adding that to the rectangular shape I add it to the group.

private void addMouseLisenter(Group group){

group.addEventFilter(MouseEvent.MOUSE_PRESSED,
                new EventHandler<MouseEvent>() {
                    public void handle(MouseEvent event) {
                        //Code here    
                    }
                 });
    }

This way both the group and the TextArea get the mouse click.

Note: If you want only the group to get the mouse click you can add event.consume().

I hope that helps someone in the future looking for something similar.

Upvotes: 0

Views: 1447

Answers (2)

Nick
Nick

Reputation: 368

I found a much more appropriate solution than what was discussed, check EDIT in my question.

Upvotes: 0

TravisF
TravisF

Reputation: 509

I am pretty sure you cannot get away from having to have the MouseListener unfortunately as that is primary class for all mouse events if you wanted the text area to react at all to mouse it has to have the listener.

as far as detecting double clicks there is another thread that contains the answer that you are seeking answered by Uluk Biy.

there is another answer on there proposed by mipa that might answer your question on detection of difference between single and double click however if the Nodes overlap each other.

EDIT

perhaps in this case it might be worth modifying mipa's answer, try adding this to your code (in applicable areas)

Integer clickCount = 0;

ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1);
ScheduledFuture<?> scheduledFuture;

root.setOnMouseClicked(new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent e) {
            if (e.getButton().equals(MouseButton.PRIMARY) && clickCount < 1) {
                    scheduledFuture = executor.schedule(() -> clickAction(), 500, TimeUnit.MILLISECONDS);    
            }
            clickCount += 1;
        }
});

private void clickAction() {
    if (clickCount == 1) {
       //actions for single click
       clickCount = 0;
    } else if (clickCount > 1) {
       //action for multiple clicks
       clickCount = 0;
    }
}

Upvotes: 1

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