最小化形式时线消失 [英] Line disappears when minimizing form

问题描述

嗨.当我画一条线时，当我最小化该页面时它消失了.我试过了
this.invalidate(true).
然后调用paint事件.
但是此事件一次只画一条线.我想一次更新很多行.

请帮忙！

Hi. When I draw a line it disappears when I minimize that page. I tried
this.invalidate(true).
Then it calls the paint event.
But this event draws one line at a time. I want to update many lines at a time.

Please help!

推荐答案

我对

My answer to this[^] question applies here as well, particularly the bit about drawing in the paint handler.

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