meshy-dev/meshy-dcc-adapters/unreal-umg

Unreal UMG Tools

Widget Blueprint authoring tools for Unreal Motion Graphics (UMG) in Unreal Engine 5.4+.

Tools

unreal_umg__create_widget_blueprint

Create a new UMG Widget Blueprint inheriting from UserWidget. The asset is placed under /Game/ namespace.

unreal_umg__add_widget_to_canvas

Add a child widget (Button, TextBlock, Image, etc.) to a CanvasPanel or other panel widget.

unreal_umg__set_widget_properties

Set widget display properties: size, anchors, visibility, tooltip, and style.

unreal_umg__bind_widget_event

Bind a widget interaction event (OnClicked, OnHovered, etc.) to a Blueprint-implemented function.

unreal_umg__create_umg_animation

Create a UMG WidgetAnimation track on a widget.

unreal_umg__add_animation_keyframe

Add a keyframe to an existing UMG animation track for position, opacity, color, scale, rotation, visibility, or shear.

unreal_umg__compile_widget_blueprint

Compile a Widget Blueprint asset and return any compilation errors.

unreal_umg__list_widget_hierarchy

Read the full widget tree hierarchy starting from a root widget.

Prerequisites

• Unreal Engine 5.4 or later with Python scripting plugin enabled
• unreal Python module available inside Unreal Editor
• meshy-dcc-unreal adapter running with this skill on its search path

Widget Type Whitelist

Only these widget types are accepted for creation:

Button, TextBlock, Image, CanvasPanel, VerticalBox, HorizontalBox, Overlay, Border, SizeBox, EditableText, ProgressBar, Slider

Event Type Whitelist

OnClicked, OnPressed, OnReleased, OnHovered, OnUnhovered, OnDragDetected, OnDragCancelled

Persistence

Every mutating tool saves the Widget Blueprint through EditorAssetLibrary.save_loaded_asset and fails when Unreal refuses the save, so a reported success always means the change reached disk.

Asset Path Constraints

All asset paths are restricted to the /Game/ content namespace. Absolute filesystem paths are rejected.