import bpy from bpy.props import IntProperty, FloatProperty class ModalOperator(bpy.types.Operator): """Move an object with the mouse, example""" bl_idname = "object.modal_operator" bl_label = "Simple Modal Operator" first_mouse_x = IntProperty() first_value = FloatProperty() def modal(self, context, event): if event.type == 'MOUSEMOVE': delta = self.first_mouse_x - event.mouse_x context.object.location.x = self.first_value + delta * 0.01 elif event.type == 'LEFTMOUSE': return {'FINISHED'} elif event.type in {'RIGHTMOUSE', 'ESC'}: context.object.location.x = self.first_value return {'CANCELLED'} return {'RUNNING_MODAL'} def invoke(self, context, event): if context.object: self.first_mouse_x = event.mouse_x self.first_value = context.object.location.x context.window_manager.modal_handler_add(self) return {'RUNNING_MODAL'} else: self.report({'WARNING'}, "No active object, could not finish") return {'CANCELLED'} def register(): bpy.utils.register_class(ModalOperator) def unregister(): bpy.utils.unregister_class(ModalOperator) if __name__ == "__main__": register() # test call bpy.ops.object.modal_operator('INVOKE_DEFAULT')