Added affecting options to the HSVDialog

First option is to affect the selected pixels only. The second it to affect the current cel, or the entire frame (all cels of the frame). Options to affect all frames and all projects will be added next. I also made changes to Canvas.handle_undo() and handle_redo() to make this work.

Once all these options are added successfully in HSVDialog, they will also be added in the rest of the Image effect dialogs.

src/UI/Dialogs/HSVDialog.gd

@@ -1,5 +1,10 @@
 extends WindowDialog
 
+
+enum {CEL, FRAME, ALL_FRAMES, ALL_PROJECTS}
+
+var affect : int = CEL
+var pixels := []
 var current_cel : Image
 var preview_image : Image
 var preview_texture : ImageTexture
@@ -13,6 +18,7 @@ onready var sat_spinbox = $MarginContainer/VBoxContainer/HBoxContainer/TextBoxes
 onready var val_spinbox = $MarginContainer/VBoxContainer/HBoxContainer/TextBoxes/Value
 
 onready var preview = $MarginContainer/VBoxContainer/TextureRect
+onready var selection_checkbox : CheckBox = $MarginContainer/VBoxContainer/AffectHBoxContainer/SelectionCheckBox
 
 
 func _ready() -> void:
@@ -25,6 +31,7 @@ func _ready() -> void:
 func _on_HSVDialog_about_to_show() -> void:
 	current_cel = Global.current_project.frames[Global.current_project.current_frame].cels[Global.current_project.current_layer].image
 	preview_image.copy_from(current_cel)
+	_on_SelectionCheckBox_toggled(selection_checkbox.pressed)
 	update_preview()
 
 
@@ -34,10 +41,15 @@ func _on_Cancel_pressed() -> void:
 
 
 func _on_Apply_pressed() -> void:
-	Global.canvas.handle_undo("Draw")
-	DrawingAlgos.adjust_hsv(current_cel, hue_slider.value, sat_slider.value, val_slider.value)
-	Global.canvas.update_texture(Global.current_project.current_layer)
-	Global.canvas.handle_redo("Draw")
+	if affect == CEL:
+		Global.canvas.handle_undo("Draw")
+		DrawingAlgos.adjust_hsv(current_cel, hue_slider.value, sat_slider.value, val_slider.value, pixels)
+		Global.canvas.handle_redo("Draw")
+	elif affect == FRAME:
+		Global.canvas.handle_undo("Draw", Global.current_project, -1)
+		for cel in Global.current_project.frames[Global.current_project.current_frame].cels:
+			DrawingAlgos.adjust_hsv(cel.image, hue_slider.value, sat_slider.value, val_slider.value, pixels)
+		Global.canvas.handle_redo("Draw", Global.current_project, -1)
 	reset()
 	visible = false
 
@@ -55,7 +67,7 @@ func reset() -> void:
 
 func update_preview() -> void:
 	preview_image.copy_from(current_cel)
-	DrawingAlgos.adjust_hsv(preview_image, hue_slider.value, sat_slider.value, val_slider.value)
+	DrawingAlgos.adjust_hsv(preview_image, hue_slider.value, sat_slider.value, val_slider.value, pixels)
 	preview_texture.create_from_image(preview_image, 0)
 	preview.texture = preview_texture
 
@@ -94,3 +106,19 @@ func _on_Value_value_changed(value : float) -> void:
 	val_spinbox.value = value
 	val_slider.value = value
 	update_preview()
+
+
+func _on_SelectionCheckBox_toggled(button_pressed : bool) -> void:
+	pixels.clear()
+	if button_pressed:
+		pixels = Global.current_project.selected_pixels.duplicate()
+	else:
+		for x in Global.current_project.size.x:
+			for y in Global.current_project.size.y:
+				pixels.append(Vector2(x, y))
+
+	update_preview()
+
+
+func _on_AffectOptionButton_item_selected(index : int) -> void:
+	affect = index

src/UI/Dialogs/HSVDialog.tscn

@@ -33,15 +33,15 @@ __meta__ = {
 
 [node name="TextureRect" type="TextureRect" parent="MarginContainer/VBoxContainer"]
 margin_right = 453.0
-margin_bottom = 197.0
+margin_bottom = 169.0
 size_flags_vertical = 3
 expand = true
 stretch_mode = 6
 
 [node name="HBoxContainer" type="HBoxContainer" parent="MarginContainer/VBoxContainer"]
-margin_top = 201.0
+margin_top = 173.0
 margin_right = 453.0
-margin_bottom = 285.0
+margin_bottom = 257.0
 custom_constants/separation = 10
 __meta__ = {
 "_edit_use_anchors_": false
@@ -132,6 +132,27 @@ margin_bottom = 84.0
 mouse_default_cursor_shape = 1
 min_value = -100.0
 
+[node name="AffectHBoxContainer" type="HBoxContainer" parent="MarginContainer/VBoxContainer"]
+margin_top = 261.0
+margin_right = 453.0
+margin_bottom = 285.0
+
+[node name="SelectionCheckBox" type="CheckBox" parent="MarginContainer/VBoxContainer/AffectHBoxContainer"]
+margin_right = 160.0
+margin_bottom = 24.0
+mouse_default_cursor_shape = 2
+pressed = true
+text = "Only affect selection"
+
+[node name="AffectOptionButton" type="OptionButton" parent="MarginContainer/VBoxContainer/AffectHBoxContainer"]
+margin_left = 164.0
+margin_right = 263.0
+margin_bottom = 24.0
+mouse_default_cursor_shape = 2
+text = "Current cel"
+items = [ "Current cel", null, false, 0, null, "Current frame", null, false, 1, null, "All frames", null, true, 2, null, "All projects", null, true, 3, null ]
+selected = 0
+
 [node name="HBoxContainer2" type="HBoxContainer" parent="MarginContainer/VBoxContainer"]
 margin_top = 289.0
 margin_right = 453.0
@@ -162,5 +183,7 @@ text = "Cancel"
 [connection signal="value_changed" from="MarginContainer/VBoxContainer/HBoxContainer/TextBoxes/Hue" to="." method="_on_Hue_value_changed"]
 [connection signal="value_changed" from="MarginContainer/VBoxContainer/HBoxContainer/TextBoxes/Saturation" to="." method="_on_Saturation_value_changed"]
 [connection signal="value_changed" from="MarginContainer/VBoxContainer/HBoxContainer/TextBoxes/Value" to="." method="_on_Value_value_changed"]
+[connection signal="toggled" from="MarginContainer/VBoxContainer/AffectHBoxContainer/SelectionCheckBox" to="." method="_on_SelectionCheckBox_toggled"]
+[connection signal="item_selected" from="MarginContainer/VBoxContainer/AffectHBoxContainer/AffectOptionButton" to="." method="_on_AffectOptionButton_item_selected"]
 [connection signal="pressed" from="MarginContainer/VBoxContainer/HBoxContainer2/Apply" to="." method="_on_Apply_pressed"]
 [connection signal="pressed" from="MarginContainer/VBoxContainer/HBoxContainer2/Cancel" to="." method="_on_Cancel_pressed"]