> For the complete documentation index, see [llms.txt](https://bkortbus.gitbook.io/unreal-python-recipe-book/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bkortbus.gitbook.io/unreal-python-recipe-book/editor-menus/python-menu-class/editor-utility-widget-launcher.md).
# Editor Utility Widget Launcher
A quick Menu Class to launch Editor Utility Widgets
Expanding off of our base class, let's make a quick class to launch our Editor Utility Widgets!
## Launching an Editor Utility Widget (EUW)
The code to launch an EUW is relatively straight forward, we just need to spawn a tab using the [EditorUtilitySubsystem](https://dev.epicgames.com/documentation/en-us/unreal-engine/python-api/class/EditorUtilitySubsystem?application_version=5.3#unreal.EditorUtilitySubsystem.spawn_and_register_tab):
```python
EditorUtilitySubsystem = unreal.get_editor_subsystem(unreal.EditorUtilitySubsystem)
asset = unreal.load_asset("/Game/Path/To/EUW")
EditorUtilitySubsystem.spawn_and_register_tab(asset)
```
We'll create a generic function to launch an EUW from its asset path:
```python
def launch_editor_utility_widget(asset_path: str):
"""Launch the given utility widget from its asset path"""
# ensure a valid asset path was provided
if not isinstance(asset_path, str):
unreal.log_error(f"The given input is not an asset path: {asset_path}")
return
if not EditorAssetLibrary.does_asset_exist(asset_path):
unreal.log_error(f"The given asset path does not exist: {asset_path}")
return
# open the EUW
asset = EditorAssetLibrary.load_asset(asset_path)
EditorUtilitySubsystem.spawn_and_register_tab(asset)
```
***
## The EditorUtilityWidgetMenuTool
With our new function and existing PythonMenuTool base class, this is all we need to declare in our new EUW Launcher class:
```python
@unreal.uclass()
class EditorUtilityWidgetMenuTool(PythonMenuTool):
"""
menu tool base class to launch specified Editor Utility Widgets
"""
widget_path = "/Game/editor/utility/widget/path"
@unreal.ufunction(override=True)
def execute(self, context):
"""Open the EUW when pressed"""
launch_editor_utility_widget(self.widget_path)
```
That's all there is to it, on execute it will launch the `widget_path` declared on the class!
***
## Demo Tool
Here's an example tool, the Meta Viewer GUI:
```python
@unreal.uclass()
class MetaViewerTool(EditorUtilityWidgetMenuTool):
name = "meta_viewer"
display_name = "Meta Viewer GUI"
tool_tip = "Launch the Meta Viewer tool"
widget_path = "/PythonRecipeBook/sample_tools/meta_viewer"
```
This provides a simple menu class setup we can make for each of our first-class Editor Utility Widget tools
Pressing the menu button launches our tool:
