Add an icon in the layer buttons for layers that contain effects

assets/graphics/layers/layer_active_effect.png.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dv5y24sb8lxg2"
+path="res://.godot/imported/layer_active_effect.png-ad3844f290bf1cd6605ac13bbf59d4b3.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/graphics/layers/layer_active_effect.png"
+dest_files=["res://.godot/imported/layer_active_effect.png-ad3844f290bf1cd6605ac13bbf59d4b3.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

src/Classes/Layers/BaseLayer.gd

@@ -5,6 +5,7 @@ extends RefCounted
 
 signal name_changed  ## Emits when [member name] is changed.
 signal visibility_changed  ## Emits when [member visible] is changed.
+signal effects_added_removed  ## Emits when an effect is added or removed to/from [member effects].
 
 ## All currently supported layer blend modes between two layers. The upper layer
 ## is the blend layer, and the bottom layer is the base layer.
@@ -254,6 +255,10 @@ func display_effects(cel: BaseCel, image_override: Image = null) -> Image:
 	return image
 
 
+func emit_effects_added_removed() -> void:
+	effects_added_removed.emit()
+
+
 # Methods to Override:
 
 

src/UI/Timeline/LayerButton.gd

@@ -33,6 +33,7 @@ var audio_player: AudioStreamPlayer
 @onready var label := %LayerNameLabel as Label
 @onready var line_edit := %LayerNameLineEdit as LineEdit
 @onready var hierarchy_spacer := %HierarchySpacer as Control
+@onready var layer_fx_texture_rect := %LayerFXTextureRect as TextureRect
 @onready var layer_type_texture_rect := %LayerTypeTextureRect as TextureRect
 @onready var linked_button := %LinkButton as BaseButton
 @onready var clipping_mask_icon := %ClippingMask as TextureRect
@@ -61,7 +62,11 @@ func _ready() -> void:
 	custom_minimum_size.y = Global.animation_timeline.cel_size
 	label.text = layer.name
 	line_edit.text = layer.name
+	layer_fx_texture_rect.visible = layer.effects.size() > 0
 	layer_type_texture_rect.texture = ARRAY_TEXTURE_TYPES[layer.get_layer_type()]
+	layer.effects_added_removed.connect(
+		func(): layer_fx_texture_rect.visible = layer.effects.size() > 0
+	)
 	for child in $HBoxContainer.get_children():
 		if not child is Button:
 			continue

src/UI/Timeline/LayerButton.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=9 format=3 uid="uid://bai814sqvk68f"]
+[gd_scene load_steps=10 format=3 uid="uid://bai814sqvk68f"]
 
 [ext_resource type="Script" path="res://src/UI/Timeline/LayerButton.gd" id="1_6hlpe"]
 [ext_resource type="Texture2D" uid="uid://c2b3htff5yox8" path="res://assets/graphics/layers/layer_visible.png" id="2_ef6fb"]
@@ -7,6 +7,7 @@
 [ext_resource type="Texture2D" uid="uid://cofw1x6chh4i" path="res://assets/graphics/layers/unlinked_layer.png" id="4_058qm"]
 [ext_resource type="Texture2D" uid="uid://ieo8fsapcgsy" path="res://assets/graphics/layers/clipping_mask.png" id="6_73j5q"]
 [ext_resource type="Script" path="res://src/UI/Timeline/LayerMainButton.gd" id="6_n8q6b"]
+[ext_resource type="Texture2D" uid="uid://dv5y24sb8lxg2" path="res://assets/graphics/layers/layer_active_effect.png" id="8_7wf6f"]
 [ext_resource type="Texture2D" uid="uid://cjvk47bd56156" path="res://assets/graphics/layers/type_icons/layer_pixel.png" id="8_ce16y"]
 
 [node name="LayerButton" type="HBoxContainer"]
@@ -166,6 +167,14 @@ editable = false
 caret_blink = true
 caret_blink_interval = 0.5
 
+[node name="LayerFXTextureRect" type="TextureRect" parent="LayerMainButton/LayerName" groups=["UIButtons"]]
+unique_name_in_owner = true
+visible = false
+layout_mode = 2
+texture = ExtResource("8_7wf6f")
+stretch_mode = 3
+flip_v = true
+
 [node name="LayerTypeTextureRect" type="TextureRect" parent="LayerMainButton/LayerName" groups=["UIButtons"]]
 unique_name_in_owner = true
 modulate = Color(1, 1, 1, 0.498039)

src/UI/Timeline/LayerEffects/LayerEffectsSettings.gd

@@ -79,9 +79,11 @@ func _on_effect_list_id_pressed(index: int) -> void:
 	Global.current_project.undos += 1
 	Global.current_project.undo_redo.create_action("Add layer effect")
 	Global.current_project.undo_redo.add_do_method(func(): layer.effects.append(effect))
+	Global.current_project.undo_redo.add_do_method(layer.emit_effects_added_removed)
 	Global.current_project.undo_redo.add_do_method(Global.canvas.queue_redraw)
 	Global.current_project.undo_redo.add_do_method(Global.undo_or_redo.bind(false))
 	Global.current_project.undo_redo.add_undo_method(func(): layer.effects.erase(effect))
+	Global.current_project.undo_redo.add_undo_method(layer.emit_effects_added_removed)
 	Global.current_project.undo_redo.add_undo_method(Global.canvas.queue_redraw)
 	Global.current_project.undo_redo.add_undo_method(Global.undo_or_redo.bind(true))
 	Global.current_project.undo_redo.commit_action()
@@ -154,9 +156,11 @@ func _delete_effect(effect: LayerEffect) -> void:
 	Global.current_project.undos += 1
 	Global.current_project.undo_redo.create_action("Delete layer effect")
 	Global.current_project.undo_redo.add_do_method(func(): layer.effects.erase(effect))
+	Global.current_project.undo_redo.add_do_method(layer.emit_effects_added_removed)
 	Global.current_project.undo_redo.add_do_method(Global.canvas.queue_redraw)
 	Global.current_project.undo_redo.add_do_method(Global.undo_or_redo.bind(false))
 	Global.current_project.undo_redo.add_undo_method(func(): layer.effects.insert(index, effect))
+	Global.current_project.undo_redo.add_undo_method(layer.emit_effects_added_removed)
 	Global.current_project.undo_redo.add_undo_method(Global.canvas.queue_redraw)
 	Global.current_project.undo_redo.add_undo_method(Global.undo_or_redo.bind(true))
 	Global.current_project.undo_redo.commit_action()