1
我添加button%
爲dialog%
象下面這樣:如何在球拍中設置按鈕%的背景?
(new button%
[label "ok"]
[parent pop-dialog%]
[callback
(lambda (b e)
(exit))])
對不起,我的完整代碼如下:
#lang racket
(require racket/gui)
(define *my-frame* (new frame%
[label "VersionMonitor"]
[width 300]
[height 200]
))
(define pop-dialog
(new dialog%
[label "bogga wogga"]
[parent *my-frame*]
[width 200]
[height 100]
))
(new canvas%
[parent pop-dialog]
[paint-callback
(lambda (canvas info-dc)
(send info-dc clear)
(send info-dc set-background "white"))])
(new button%
[label "ok"]
[parent pop-dialog]
[callback
(lambda (b e)
(exit))])
(send *my-frame* show #t)
(send pop-dialog show #t)
現在你可以看到的灰色區域。我真正的問題是如何設置按鈕%的區域的背景 ?
但button%
周圍有一個矩形,超出了它自己。背景是灰色的,我想 將其顏色設置爲白色,但沒有找到辦法做到這一點。