Add spine and dialogic museums

addons/dialogic/Modules/Background/dialogic_background.gd

@@ -0,0 +1,37 @@
+extends Node
+class_name DialogicBackground
+
+## This is the base class for dialogic backgrounds.
+## Extend it and override it's methods when you create a custom background.
+## You can take a look at the default background to get an idea of how it's working.
+
+
+## The subviewport container that holds this background. Set when instanced.
+var viewport_container: SubViewportContainer
+## The viewport that holds this background. Set when instanced.
+var viewport: SubViewport
+
+
+## Load the new background in here.
+## The time argument is given for when [_should_do_background_update] returns true
+## (then you have to do a transition in here)
+func _update_background(_argument:String, _time:float) -> void:
+	pass
+
+
+## If a background event with this scene is encountered while this background is used,
+##   this decides whether to create a new instance and call fade_out or just call [_update_background] # on this scene. Default is false
+func _should_do_background_update(_argument:String) -> bool:
+	return false
+
+
+## Called by dialogic when first created.
+## If you return false (by default) it will attempt to animate the "modulate" property.
+func _custom_fade_in(_time:float) -> bool:
+	return false
+
+
+## Called by dialogic before removing (done by dialogic).
+## If you return false (by default) it will attempt to animate the "modulate" property.
+func _custom_fade_out(_time:float) -> bool:
+	return false