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framelesshelper
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Win32: fix the multi-monitor issue again 

This solution have no run-time overhead.

Signed-off-by: Yuhang Zhao <2546789017@qq.com>
This commit is contained in:
Yuhang Zhao 2021-03-13 11:07:49 +08:00
parent d4550b63bd
commit 0d7f3dba7e
1 changed files with 16 additions and 1 deletions
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17
framelesswindowsmanager.cpp
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@ -26,6 +26,8 @@
#include <QtGui/qwindow.h>
#include "utilities.h"
#ifdef Q_OS_WINDOWS
#include <QtCore/qthread.h>
#include <QtGui/qscreen.h>
#include "framelesshelper_win32.h"
#else
#include "framelesshelper.h"
@ -44,7 +46,20 @@ void FramelessWindowsManager::addWindow(const QWindow *window)
return;
}
#ifdef Q_OS_WINDOWS
FramelessHelperWin::addFramelessWindow(const_cast<QWindow *>(window));
const auto win = const_cast<QWindow *>(window);
FramelessHelperWin::addFramelessWindow(win);
// Work-around a Win32 multi-monitor bug.
QObject::connect(win, &QWindow::screenChanged, [win](QScreen *screen){
Q_UNUSED(screen);
const QSize originalSize = win->size();
// Don't make the tempSize too large/small otherwise the user will see the resize.
const QSize tempSize = originalSize + QSize{1, 1};
// Do a resize manually to forcely trigger the re-layout and re-paint of the window.
win->resize(tempSize);
// We need to let the OS have enough time to do the actual change.
QThread::msleep(500); // FIXME: is it enough?
win->resize(originalSize);
});
#else
framelessHelper()->removeWindowFrame(const_cast<QWindow *>(window));
#endif