brokenbutton.py

import unreal

def on_button_clicked():
    unreal.log("Custom Editor Button Clicked!")

def add_custom_toolbar_button():
    editor_utility_subsystem = unreal.get_editor_subsystem(unreal.EditorUtilitySubsystem)
    
    if not editor_utility_subsystem:
        unreal.log_warning("Failed to get EditorUtilitySubsystem!")
        return
    
    tool_menus = unreal.ToolMenus.get()
    toolbar_menu = tool_menus.extend_menu("LevelEditor.MainToolBar")
    
    entry = unreal.ToolMenuEntry(
        name="CustomButton",
        type=unreal.MultiBlockType.TOOL_BAR_BUTTON,
        insert_position=unreal.ToolMenuInsert("Settings", unreal.ToolMenuInsertType.AFTER)
    )
    
    entry.set_label("My Button")
    entry.set_tool_tip("Click to run custom action")
    entry.set_icon("EditorStyle", "Icons.Toolbar.Settings")
    entry.set_string_command(unreal.ToolMenuStringCommand(
        type=unreal.ToolMenuStringCommandType.PYTHON,
        custom_type="",
        string="on_button_clicked()"
    ))
    
    toolbar_menu.add_menu_entry("CustomSection", entry)
    tool_menus.refresh_all_widgets()
    
    unreal.log("Custom toolbar button added!")

# Run the function to add the button
add_custom_toolbar_button()