如何重绘？

#include "demo_view.h"
#include <rtgui/rtgui_system.h>
#include <rtgui/widgets/label.h>
#include <rtgui/widgets/checkbox.h>
#include <rtgui/widgets/window.h>
#include <rtgui/widgets/button.h>
static rtgui_view_t *view1;
static rtgui_checkbox_t* checkbox1;
static rtgui_win_t *win1;
static rtgui_rect_t rect;
/* 改变window中的checkbox位置并重绘window */
static void change_checkbox_position(struct rtgui_widget* widget, struct rtgui_event* event)
{
   rect.y1 +=10;
   rect.y2 +=10;
   rtgui_widget_set_rect(RTGUI_WIDGET(checkbox1), &rect);
   rtgui_widget_update(RTGUI_WIDGET(win1));    
}
/*创建非模态window*/
void create_new_window(rtgui_widget_t *widget)
{
       rtgui_toplevel_t *parent;
    rtgui_label_t* label;
    rtgui_rect_t rect_size = {0, 100, 200, 120};            
    parent = RTGUI_TOPLEVEL(rtgui_widget_get_toplevel(widget));
    /* 创建一个窗口，风格为无标题及无边框 */
    win1 = rtgui_win_create(parent,
        "Table", &rect_size, RTGUI_WIN_STYLE_NO_TITLE);
    rtgui_rect_moveto(&rect_size, 0, 45);
    rtgui_win_set_rect(win1,&rect_size);    
    label = rtgui_label_create("这是非模态窗口");
    /* 设置label的位置 */
    rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect_size);
    /* view是一个container控件，调用add_child方法添加这个label控件 */            
    rtgui_container_add_child(RTGUI_CONTAINER(win1), RTGUI_WIDGET(label));
    rect.x1=0;
    rect.y1=100;
    rect.x2=100;
    rect.y2=120;
   /* 创建一个checkbox控件  */
   checkbox1 = rtgui_checkbox_create("test",RT_FALSE);
   /* 设置label的位置 */
   rtgui_widget_set_rect(RTGUI_WIDGET(checkbox1), &rect);
   /* view是一个container控件，调用add_child方法添加这个label控件 */            
   rtgui_container_add_child(RTGUI_CONTAINER(win1), RTGUI_WIDGET(checkbox1));
   /* 非模态显示窗口 */
    rtgui_win_show(win1, RT_FALSE);
}
rtgui_view_t *wind_test(rtgui_workbench_t* workbench)
{    
    rtgui_button_t *button;
    rtgui_rect_t widget_rect;
    view1 = demo_view(workbench, "test");
    demo_view_get_rect(view1, &widget_rect);
    widget_rect.x1 += 5;
    widget_rect.x2 = widget_rect.x1 + 100;
    widget_rect.y1 += 5;
    widget_rect.y2 = widget_rect.y1 + 20;
    button = rtgui_button_create("上移");
    rtgui_widget_set_rect(RTGUI_WIDGET(button), &widget_rect);
    rtgui_container_add_child(RTGUI_CONTAINER(view1), RTGUI_WIDGET(button));
    rtgui_button_set_onbutton(button, change_checkbox_position);        
    return view1;
}

    if ( demo_view_current==1)//这里加上显示非模态窗口的函数
    {
        create_new_window(RTGUI_WIDGET(demo_view_list[demo_view_current]));
    }
}