widget_window是快速可视化窗口
;新建widget_base:
wBase = WIDGET_BASE(/COLUMN)
;colomn和raw是子组件的排列方式
;新建widget_window
wDraw = WIDGET_WINDOW(wBase, XSIZE=400, YSIZE=400)
;显示GUI:
WIDGET_CONTROL, wBase, /REALIZE
; Retrieve the newly-created Window object.
WIDGET_CONTROL, wDraw, GET_VALUE=oWin
; Make sure this is the current window
oWin.Select
p=plot(findgen(255),rgb_Table=33,thick=5,/current)