gd: added input addon

addons/guide/guide_input_tracker.gd

@@ -0,0 +1,26 @@
+## Tracker that tracks input for a window and injects it into GUIDE.
+## Will automatically keep track of sub-windows.
+extends Node
+
+## Instruments a sub-window so it forwards input events to GUIDE.
+static func _instrument(viewport:Viewport):
+	if viewport.has_meta("x-guide-instrumented"):
+		return
+	
+	var tracker = preload("guide_input_tracker.gd").new()
+	tracker.process_mode = Node.PROCESS_MODE_ALWAYS
+	viewport.add_child(tracker, false, Node.INTERNAL_MODE_BACK)
+	viewport.gui_focus_changed.connect(tracker._control_focused)
+	
+## Catches unhandled input and forwards it to GUIDE
+func _unhandled_input(event:InputEvent):
+	GUIDE.inject_input(event)
+
+## Some ... creative code ... to catch events from popup windows
+## that are spawned by Godot's control nodes.
+func _control_focused(control:Control):
+	if control is OptionButton or control is ColorPickerButton \
+			or control is MenuButton or control is TabContainer:
+		_instrument(control.get_popup())	
+	
+