C++ WM_NCCALCSIZE 未发送 [英] C++ WM_NCCALCSIZE not being sent

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本文介绍了C++ WM_NCCALCSIZE 未发送的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我试图将编辑控件中的文本垂直居中,经过一些研究,我发现我必须处理 WM_NCCALCSIZE 消息.所以我已经子类化了我的编辑控件,但 WM_NCCALCSIZE 消息从未发送过.

我做错了什么吗?

所以我正在很好地处理 WM_NCCALCSIZE 消息,并且我通过将 WS_EX_CLIENTEDGE 传递给 CreateWindowEx 创建了一个 3d 边框.但是,如果我通过终止主题服务来禁用 Windows 主题,则处理 WM_NCCALCSIZE 消息的控件上的边框会消失.另一个不处理 WM_NCCALCSIZE 消息的控件仍然具有正常的边框.

所以我假设我应该在 WM_NCCALCSIZE 中做一些事情来让我保持边界?如果是什么?如果没有办法恢复边界?

解决方案

想通了,WM_NCCALCSIZE 在编辑控件被子类化之前发送.
所以我必须超类 EDIT 类.


我刚刚想到的另一个解决方案是对其进行子类化,然后使用 SWP_FRAMECHANGED 调用 SetWindowPos,这会导致它发送 WM_NCCALCSIZE 消息.>

如果有人对为什么一种方法比另一种方法更好有任何意见,请发表评论:)

I'm trying to center the text in a edit control vertically, after some research I found I have to process the WM_NCCALCSIZE message. So i've subclassed my edit control, but the WM_NCCALCSIZE message is never sent.

Am I doing something wrong?

EDIT:

So i'm processing the WM_NCCALCSIZE message fine, and I have a 3d border created by passing WS_EX_CLIENTEDGE to CreateWindowEx. But if I disable windows themes by killing the theme service, the border goes away on the control thats processing the WM_NCCALCSIZE message. Another control that doesnt process the WM_NCCALCSIZE message still has the border like normal.

So i'm assuming I'm supposed to be doing somethign in WM_NCCALCSIZE that allows me to keep the border? If so what? if not any way to get the border back?

解决方案

Figured it out, WM_NCCALCSIZE is sent before the edit control is subclassed.
So i had to superclass the EDIT class.

EDIT:
Another solution I just thought of would be to subclass it, then call SetWindowPos with SWP_FRAMECHANGED, this causes it to send the WM_NCCALCSIZE message.

If anyone has any opinions why one method would be better then the other, please comment :)

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