         @itemControl.show()
         @itemControl.render()
         @line_list_view.render()
+
+    @::lazyRender = _.debounce(@::render, 50)
 
     _setChildControlEvent:(view) =>
         view.bind("onClick", (obj, e) =>

        )
        @line_list_view.render()

    lazyRender:()=>
        clearTimeout(@lazy_render_set_timeout) if @lazy_render_set_timeout
        @lazy_render_set_timeout = setTimeout((() =>
            @render()
            @lazy_render_set_timeout = null
        ), 50)

    initControls:(models) =>
        @clear()
        for model in models

            })

        @mode = ""

    getControl:() => @itemControl
    setCanvas:(canvas) =>
