这里讨论的只是Windows平台上的实现。
在QT中绘制异形窗口,只要设定 windowFlag 为 CustomizeWindowHint,再结合setMask()就可以做出各种奇形怪状的窗口。相对来说比较麻烦的, 是进行窗口拖动和缩放的处理。
在 Windows SDK 和 MFC 中比较容易,只要处理 WM_NCHITTEST,返回相应的测试值就可以了。幸运的是,QT中也提供了直接处理各平台消息的方法,在 Windows下只需要重载winEvent方法。
下面给出了示例代码:
// include <windows.h> bool MyDialog::winEvent(MSG* msg, long* result) { const int captionHeight = 25; const int frameWidth = 6; if (msg->message != WM_NCHITTEST) return false; QPoint pos = mapFromGlobal(QCursor::pos()); int w = width(); int h = height(); if (QRect(frameWidth, captionHeight, w-frameWidth-frameWidth, h-captionHeight-frameWidth).contains(pos)) { *result = HTCLIENT; } else if (QRect(0, 0, w, captionHeight).contains(pos)) { *result = HTCAPTION; } else if (QRect(0, captionHeight, frameWidth, h-captionHeight-frameWidth).contains(pos)) { *result = HTLEFT; } else if (QRect(w-frameWidth, captionHeight, frameWidth, h-captionHeight-frameWidth).contains(pos)) { *result = HTRIGHT; } else if (QRect(frameWidth, h-frameWidth, w-frameWidth-frameWidth, frameWidth).contains(pos)) { *result = HTBOTTOM; } else if (QRect(0, h-frameWidth, frameWidth, frameWidth).contains(pos)) { *result = HTBOTTOMLEFT; } else if (QRect(w-frameWidth, h-frameWidth, frameWidth, frameWidth).contains(pos)) { *result = HTBOTTOMRIGHT; } return true; }
参考:http://www.cppblog.com/eXile/archive/2007/12/09/38084.html
时间: 2024-11-03 01:18:56