Ignore mouse & stop mouse
In each control type node there are two properties quite interesting when dealing with overlapping objects that handle input events.
A typical case scenario is when some control is not receiving events, in that case you should check that this two properties are set correctly in regards to the expected behaviour. Take into account that in godot the tree hierarchy works placing the object from bottom to top, meaning that the last object in the scene tree will be the last drawn or placed, and will overlap other objects.
Ignore mouse or focus\ignore_mouse
By default set to false.
If set to true It will ignore the mouse and pointer events (input_event) for the node in question, meaning that the node will not have any interaction with any input_event. This only affect the node in question, neither child or parent nodes.
For example, if you are using a button node with a signal when the button is pressed(), and ignore is set to true that node will not receive any event and as a result the signal will not be triggered.
Consequently any other node under that control node will receive the signals.
Stop mouse or focus\stop_mouse
By default set to true.
If set to true any parent node will not receive any event, meaning that every input_event will be absorbed by that node.
Three things to take into account:
- This does not affect to siblings, meaning that if a control overlap any sibling object this will not receive the signal no matter if
stop mouseis set totrueorfalse. - This only affect to the place where those controls overlap.
- If
ignore mouseis set totrue, no matter how you configurestop mouseas it will not receive any event.
Behind parent or visibility/behind_parent
Another property available that influence how the events of overlapping objects are handled is the behind parent of tho CanvasItem class.
This property alter the way are placed into the scene, meaning that if set to true the node will placed behind it parents, as a result this will alter which nodes will receive the events.