Use Apply button with F5 keybinding instead of reapplying the shader on every code change

project.godot

@@ -54,6 +54,11 @@ drag={
 "events": [Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"button_mask":1,"position":Vector2(183, 23),"global_position":Vector2(187, 64),"factor":1.0,"button_index":1,"canceled":false,"pressed":true,"double_click":false,"script":null)
 ]
 }
+apply_shader={
+"deadzone": 0.5,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":4194336,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
 
 [rendering]
 

scenes/main.tscn

@@ -172,8 +172,8 @@ layout_mode = 1
 anchors_preset = 1
 anchor_left = 1.0
 anchor_right = 1.0
-offset_left = -120.0
-offset_right = -64.0
+offset_left = -216.0
+offset_right = -160.0
 offset_bottom = 32.0
 grow_horizontal = 0
 text = "Open"
@@ -183,11 +183,22 @@ layout_mode = 1
 anchors_preset = 1
 anchor_left = 1.0
 anchor_right = 1.0
-offset_left = -56.0
+offset_left = -152.0
+offset_right = -96.0
 offset_bottom = 32.0
 grow_horizontal = 0
 text = "Save"
 
+[node name="ApplyShaderButton" type="Button" parent="UI_Layer/UserInterfaceContainer/Editor"]
+layout_mode = 1
+anchors_preset = 1
+anchor_left = 1.0
+anchor_right = 1.0
+offset_left = -88.0
+offset_bottom = 32.0
+grow_horizontal = 0
+text = "Apply (F5)"
+
 [node name="Camera" type="Camera2D" parent="."]
 script = ExtResource("8_mls06")
 
@@ -200,6 +211,6 @@ script = ExtResource("8_mls06")
 [connection signal="file_selected" from="UI_Layer/UserInterfaceContainer/Editor/SaveShaderDialog" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_save_shader_dialog_file_selected"]
 [connection signal="item_selected" from="UI_Layer/UserInterfaceContainer/Editor/PresetOptions" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_preset_options_item_selected"]
 [connection signal="code_completion_requested" from="UI_Layer/UserInterfaceContainer/Editor/CodeEdit" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_code_edit_code_completion_requested"]
-[connection signal="text_changed" from="UI_Layer/UserInterfaceContainer/Editor/CodeEdit" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_code_edit_text_changed"]
 [connection signal="pressed" from="UI_Layer/UserInterfaceContainer/Editor/OpenShaderButton" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_open_shader_button_pressed"]
 [connection signal="pressed" from="UI_Layer/UserInterfaceContainer/Editor/SaveShaderButton" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_save_shader_button_pressed"]
+[connection signal="pressed" from="UI_Layer/UserInterfaceContainer/Editor/ApplyShaderButton" to="UI_Layer/UserInterfaceContainer/Editor" method="_on_apply_shader_button_pressed"]

src/Editor.gd

@@ -187,11 +187,9 @@ func _ready():
 		c.connect("mouse_exited", _camera_unfreeze)
 	update()
 
-func _on_code_edit_text_changed():
-	var shader = Shader.new()
-	shader.code = code_editor.text
-	Globals.shader = shader
-	Globals.target_viewport.update()
+func _input(event):
+	if event.is_action_pressed("apply_shader"):
+		_on_apply_shader_button_pressed()
 
 func _on_preset_options_item_selected(index):
 	selected_preset_name = preset_options.get_item_text(index)
@@ -233,3 +231,9 @@ func _on_save_shader_dialog_file_selected(path):
 	var file = FileAccess.open(path, FileAccess.WRITE)
 	var content = Globals.shader.code
 	file.store_string(content)
+
+func _on_apply_shader_button_pressed():
+	var shader = Shader.new()
+	shader.code = code_editor.text
+	Globals.shader = shader
+	Globals.target_viewport.update()