Minor guide and rulers performance boost

Got rid of their _process methods, Guides have input instead, and the rulers get updated when the camera zoom or offset change.

Scripts/CameraMovement.gd

@@ -1,5 +1,6 @@
 extends Camera2D
 
+
 var tween : Tween
 var zoom_min := Vector2(0.005, 0.005)
 var zoom_max := Vector2.ONE
@@ -7,10 +8,12 @@ var viewport_container : ViewportContainer
 var mouse_pos := Vector2.ZERO
 var drag := false
 
+
 func _ready() -> void:
 	viewport_container = get_parent().get_parent()
 	tween = Tween.new()
 	add_child(tween)
+	tween.connect("tween_step", self, "_on_tween_step")
 
 
 # Get the speed multiplier for when you've pressed
@@ -117,6 +120,9 @@ func _input(event : InputEvent) -> void:
 		elif is_action_direction_released(event):
 			process_direction_action_released(event)
 
+		Global.horizontal_ruler.update()
+		Global.vertical_ruler.update()
+
 
 # Zoom Camera
 func zoom_camera(dir : int) -> void:
@@ -145,3 +151,9 @@ func zoom_camera(dir : int) -> void:
 		offset = offset + (-0.5 * viewport_size + mouse_pos) * (prev_zoom - zoom)
 		if name == "Camera2D":
 			Global.zoom_level_label.text = str(round(100 / Global.camera.zoom.x)) + " %"
+
+
+
+func _on_tween_step(_object: Object, _key: NodePath, _elapsed: float, _value: Object) -> void:
+	Global.horizontal_ruler.update()
+	Global.vertical_ruler.update()

Scripts/Canvas.gd

@@ -528,6 +528,9 @@ func camera_zoom() -> void:
 	Global.camera2.offset = size / 2
 	Global.camera_preview.offset = size / 2
 
+	Global.horizontal_ruler.update()
+	Global.vertical_ruler.update()
+
 func handle_undo(action : String) -> void:
 	if !can_undo:
 		return

Scripts/Main.gd

@@ -666,12 +666,16 @@ func _on_FitToFrameButton_pressed() -> void:
 	Global.camera.zoom = Vector2(bigger_canvas_axis, bigger_canvas_axis) / smaller_viewport_axis
 	Global.camera.offset = Global.canvas.size / 2
 	Global.zoom_level_label.text = str(round(100 / Global.camera.zoom.x)) + " %"
+	Global.horizontal_ruler.update()
+	Global.vertical_ruler.update()
 
 
 func _on_100ZoomButton_pressed() -> void:
 	Global.camera.zoom = Vector2.ONE
 	Global.camera.offset = Global.canvas.size / 2
 	Global.zoom_level_label.text = str(round(100 / Global.camera.zoom.x)) + " %"
+	Global.horizontal_ruler.update()
+	Global.vertical_ruler.update()
 
 
 func _on_LeftHorizontalMirroring_toggled(button_pressed) -> void:

Scripts/Rulers/Guides.gd

@@ -13,8 +13,8 @@ func _ready() -> void:
 	width = 0.1
 	default_color = Global.guide_color
 
-# warning-ignore:unused_argument
+
-func _process(delta : float) -> void:
+func _input(_event : InputEvent):
 	width = Global.camera.zoom.x * 2
 	mouse_pos = get_local_mouse_position()
 	var point0 := points[0]

Scripts/Rulers/HorizontalRuler.gd

@@ -9,27 +9,12 @@ var minor_subdivision := 4
 var first : Vector2
 var last : Vector2
 
-onready var _prev_camera_offset: Vector2 = Global.camera.offset
-onready var _prev_camera_zoom: Vector2 = Global.camera.zoom
 
 func _ready() -> void:
 	Global.main_viewport.connect("item_rect_changed", self, "update")
 
-# warning-ignore:unused_argument
-func _process(delta : float) -> void:
-	var mouse_pos := get_local_mouse_position()
-	if mouse_pos.x < RULER_WIDTH: #For double guides
-		mouse_default_cursor_shape = Control.CURSOR_FDIAGSIZE
-	else:
-		mouse_default_cursor_shape = Control.CURSOR_VSPLIT
-	if Global.camera.offset != _prev_camera_offset:
-		_prev_camera_offset = Global.camera.offset
-		update()
-	if Global.camera.zoom != _prev_camera_zoom:
-		_prev_camera_zoom = Global.camera.zoom
-		update()
 
-#Code taken and modified from Godot's source code
+# Code taken and modified from Godot's source code
 func _draw() -> void:
 	var transform := Transform2D()
 	var ruler_transform := Transform2D()
@@ -70,11 +55,12 @@ func _draw() -> void:
 			else:
 				draw_line(Vector2(position.x + RULER_WIDTH, RULER_WIDTH * 0.66), Vector2(position.x + RULER_WIDTH, RULER_WIDTH), Color.white)
 
+
 func _on_HorizontalRuler_pressed() -> void:
 	if !Global.show_guides:
 		return
 	var mouse_pos := get_local_mouse_position()
-	if mouse_pos.x < RULER_WIDTH: #For double guides
+	if mouse_pos.x < RULER_WIDTH: # For double guides
 		Global.vertical_ruler._on_VerticalRuler_pressed()
 	var guide := Guide.new()
 	guide.type = guide.Types.HORIZONTAL
@@ -83,3 +69,11 @@ func _on_HorizontalRuler_pressed() -> void:
 	Global.canvas.add_child(guide)
 	Global.has_focus = false
 	update()
+
+
+func _on_HorizontalRuler_mouse_entered() -> void:
+	var mouse_pos := get_local_mouse_position()
+	if mouse_pos.x < RULER_WIDTH: # For double guides
+		mouse_default_cursor_shape = Control.CURSOR_FDIAGSIZE
+	else:
+		mouse_default_cursor_shape = Control.CURSOR_VSPLIT

Scripts/Rulers/VerticalRuler.gd

@@ -9,22 +9,12 @@ var minor_subdivision := 4
 var first : Vector2
 var last : Vector2
 
-onready var _prev_camera_offset: Vector2 = Global.camera.offset
-onready var _prev_camera_zoom: Vector2 = Global.camera.zoom
 
 func _ready() -> void:
 	Global.main_viewport.connect("item_rect_changed", self, "update")
 
-# warning-ignore:unused_argument
-func _process(delta : float) -> void:
-	if Global.camera.offset != _prev_camera_offset:
-		_prev_camera_offset = Global.camera.offset
-		update()
-	if Global.camera.zoom != _prev_camera_zoom:
-		_prev_camera_zoom = Global.camera.zoom
-		update()
 
-#Code taken and modified from Godot's source code
+# Code taken and modified from Godot's source code
 func _draw() -> void:
 	var transform := Transform2D()
 	var ruler_transform := Transform2D()
@@ -68,6 +58,7 @@ func _draw() -> void:
 			else:
 				draw_line(Vector2(RULER_WIDTH * 0.66, position.y), Vector2(RULER_WIDTH, position.y), Color.white)
 
+
 func _on_VerticalRuler_pressed() -> void:
 	if !Global.show_guides:
 		return