Two overlapping Area2D / pickable CollisionObjects both receive input event

[p10tr3k]

Godot version:
3.1

OS/device including version:
Windows 10

Issue description:
I have two overlapping Area2d with rectangle shape. When I click them, both got input event. The one at the bottom gets the event first.
So there is no way to just click the top one. Moreover the get_tree().set_input_as_handled() doesn't stop propagating this event.

Minimal reproduction project:
godotArea2dOverlapping.zip

[mrcdk]

That's expected. The signals have already been emitted so the event can't be set as handled. If you need more control over it you'll need to use _input_event()

[p10tr3k]

It seems to me that Area2D should have some kind mechanism to be able to click just the top most

[p10tr3k]

For some time I am searching the web trying to find generic solution for this, but I only find people with similar question.

[p10tr3k]

I wrote this code and it seems to work in my case, but I do not know if it will work for all cases. Still i think Area2D should do this out of the box.

func _on_Area2D_input_event(viewport, event, shape_idx):
	if event is InputEventMouseButton and event.is_pressed():
		var areas = get_overlapping_areas()
		var is_on_top = true
		if areas.size() > 0:
			for area in areas:
				if not is_greater_than(area) and area.is_visible_in_tree():
					is_on_top = false				
		if is_on_top:
			emit_signal("mouse_event", event)

[Winsalot]

I have also ran into this issue, so I though I would share my own workaround:

var mouse_entered = false

func _unhandled_input(event):
	if event.is_action_pressed("mouse_left_click") && \
	mouse_entered:
		# do here whatever should happen when you click on that node
		self.get_tree().set_input_as_handled()

func _on_Area2D_mouse_entered():
	mouse_entered = true

func _on_Area2D_mouse_exited():
	mouse_entered = false

Here I only use Area2D signals to check if the mouse is inside the CollisionShape2D. The input event is handled directly by the node without emitting any signals.

[lukepass]

I'm having the same issue and I think that Area2D should have a machanism to mask the input of the other Area2D items below.

@Winsalot thanks for the workaround! However how can I know the order in which the areas are clicked? As far as I can tell if I click on an area the order of input is random, correct?

[Sauermann]

looks like a duplicate of #16042 and has more detail info

[Calinou]

Please don't bump issues without contributing significant new information. Use the 👍 reaction button on the first post instead.

[mnemoli]

@Calinou can I give a gentle nudge on PR review for this?