feat: allow shifting the shapes along the sprite frames

This helps when adding new sprite frames to the animation,
after you've already configured the shape frames.

Fixes #4

/spend 6h

addons/goutte.animated_shape_2d/animated_shape_2d.gd

@@ -1,7 +1,5 @@
 @tool
 extends Node
-## Animates a Shape2D for each frame of an AnimatedSprite.
-## You can put this pretty much anywhere you want in your scene.
 class_name AnimatedShape2D
 
 #                 _                 _           _  _____ _
@@ -11,7 +9,9 @@ class_name AnimatedShape2D
 #  / ____ \| | | | | | | | | | (_| | ||  __/ (_| |____) | | | | (_| | |_) |  __/
 # /_/    \_\_| |_|_|_| |_| |_|\__,_|\__\___|\__,_|_____/|_| |_|\__,_| .__/ \___|
 #                                                                   | |
-# v0.1.2-20231229                                                   |_|
+# v0.1.3-20231231                                                   |_|
+## Animates a CollisionShape2D for each frame of an AnimatedSprite2D.
+## You can put this pretty much anywhere you want in your scene.
 
 
 ## Animated sprite we're going to watch to figure out which shape we want.
@@ -80,13 +80,15 @@ func setup():
 	self.collision_shape_parent = self.collision_shape.get_parent()
 	if self.collision_shape_parent != null:
 		self.initial_scale = self.collision_shape_parent.scale
+
 	self.animated_sprite.frame_changed.connect(update_shape)
 
 
 func update_shape():
 	var animation_name := self.animated_sprite.get_animation()
 	var frame := self.animated_sprite.get_frame()
 	var shape_frame := self.shape_frames.get_shape_frame(animation_name, frame)
+
 	var shape: Shape2D = null
 	if shape_frame != null:
 		shape = shape_frame.get_shape()
@@ -96,20 +98,22 @@ func update_shape():
 		position = shape_frame.position
 		disabled = shape_frame.disabled
 	if shape == null and self.use_previous_as_fallback:
+		# Improvement idea: allow flipping in this case as well
 		return
 	if shape == null and self.use_initial_as_fallback:
 		shape = self.fallback_shape
 		position = self.fallback_position
 		disabled = self.fallback_disabled
+
 	self.collision_shape.shape = shape
 	self.collision_shape.position = position
 	self.collision_shape.disabled = disabled
 	if self.handle_flip_h and is_collision_shape_parent_flippable():
 		# Improvement idea: flip the CollisionBody2D itself and mirror its x pos
 		if self.animated_sprite.flip_h:
-			self.collision_shape_parent.scale.x = -1.0 * self.initial_scale.x
+			self.collision_shape_parent.scale.x = -self.initial_scale.x
 		else:
-			self.collision_shape_parent.scale.x = 1.0 * self.initial_scale.x
+			self.collision_shape_parent.scale.x = self.initial_scale.x
 
 
 ## We don't want to flip PhysicsBodies because it creates odd behaviors.

addons/goutte.animated_shape_2d/editor/icons/shift_left.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://btv6bx8bipqrm"
+path="res://.godot/imported/shift_left.png-2904efcb7f02a4fa2b265a34ae875c4f.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://addons/goutte.animated_shape_2d/editor/icons/shift_left.png"
+dest_files=["res://.godot/imported/shift_left.png-2904efcb7f02a4fa2b265a34ae875c4f.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

addons/goutte.animated_shape_2d/editor/icons/shift_right.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://q30fj4bowepc"
+path="res://.godot/imported/shift_right.png-de4924e407dbbfc32773a9a30221b8a0.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://addons/goutte.animated_shape_2d/editor/icons/shift_right.png"
+dest_files=["res://.godot/imported/shift_right.png-de4924e407dbbfc32773a9a30221b8a0.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

addons/goutte.animated_shape_2d/editor/shape_frame_editor.gd

@@ -1,8 +1,9 @@
 @tool
 extends Control
+class_name ShapeFrameEditor
+
 ## Editor GUI for a single ShapeFrame2D.
 ## Shows a preview of the sprite and the shape, as well as action buttons.
-class_name ShapeFrameEditor
 
 
 const SHAPE_PREVIEW_SCRIPT := preload("./shape_preview.gd")
@@ -24,6 +25,10 @@ var background_color := Color.WEB_GRAY
 var undo_redo: EditorUndoRedoManager
 
 
+signal frame_selected
+signal frame_deselected
+
+
 ## Mandatory dependency injection, since it's best to leave _init() alone.
 func configure(
 	animated_shape: AnimatedShape2D,
@@ -55,6 +60,8 @@ func _enter_tree():
 func _exit_tree():
 	disconnect_from_shape_frame()
 	remove_preview_of_shape_frame()
+	if is_selected():
+		frame_deselected.emit()
 
 
 func build(button_group: ButtonGroup):
@@ -73,6 +80,19 @@ func get_shape_frame() -> ShapeFrame2D:
 	)
 
 
+func set_shape_frame(value: ShapeFrame2D):
+	if self.animated_shape == null:
+		return
+	if self.animated_shape.shape_frames == null:
+		return
+	disconnect_from_shape_frame()
+	self.animated_shape.shape_frames.set_shape_frame(
+		self.animation_name, self.frame_index, value,
+	)
+	connect_to_shape_frame()
+	update()
+
+
 ## Connect to the edited Resource, in order to update the GUI in real time.
 func connect_to_shape_frame():
 	var shape_frame := get_shape_frame()
@@ -88,6 +108,14 @@ func disconnect_from_shape_frame():
 			shape_frame.changed.disconnect(on_shape_frame_changed)
 
 
+func is_selected() -> bool:
+	return %SpriteButton.button_pressed
+
+
+func select():
+	%SpriteButton.button_pressed = true
+
+
 ## The crux of the matter ; update the scene according to the data.
 func update():
 	if self.animated_shape == null:
@@ -377,15 +405,17 @@ func on_shape_frame_changed():
 
 func _on_sprite_button_toggled(toggled_on: bool):
 	if toggled_on:
+		frame_selected.emit()
 		preview_shape_frame()
 		#inspect_shape_frame()  # nope, the preview has priority somehow
 		#inspect_shape_frame.call_deferred()  # nope too
-		# So, this horrendous await that will create bugs
+		# So, we use this horrendous await that will create bugs:
 		get_tree().create_timer(0.064).timeout.connect(
 			func():
 				inspect_shape_frame()
 		)
 	else:
+		frame_deselected.emit()
 		remove_preview_of_shape_frame()
 
 
@@ -399,7 +429,10 @@ func _on_create_button_pressed():
 	shape_frame = ShapeFrame2D.new()
 	shape_frame.disabled = self.animated_shape.collision_shape.disabled
 	shape_frame.position = self.animated_shape.collision_shape.position
-	shape_frame.shape = self.animated_shape.collision_shape.shape.duplicate(true)
+	if self.animated_shape.collision_shape.shape:
+		shape_frame.shape = self.animated_shape.collision_shape.shape.duplicate(true)
+	else:
+		shape_frame.shape = RectangleShape2D.new()
 	self.animated_shape.shape_frames.set_shape_frame(
 		self.animation_name, self.frame_index, shape_frame,
 	)