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Windows: Fix reported screen metrics.

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A call to SetProcessDPIAware() is required in some cases.

Task-number: QTBUG-30063
Change-Id: Iba0203d76c8e7068bf9fd4581770c1aca76a4708
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
This commit is contained in:
Friedemann Kleint 2013-03-22 11:17:15 +01:00 committed by The Qt Project
parent d8406d0e09
commit 11e9f1368b
2 changed files with 12 additions and 4 deletions
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12
src/plugins/platforms/windows/qwindowscontext.cpp
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@ -172,7 +172,7 @@ QWindowsUser32DLL::QWindowsUser32DLL() :
updateLayeredWindowIndirect(0),
isHungAppWindow(0),
registerTouchWindow(0), unregisterTouchWindow(0),
getTouchInputInfo(0), closeTouchInputHandle(0)
getTouchInputInfo(0), closeTouchInputHandle(0), setProcessDPIAware(0)
{
}
@ -187,6 +187,7 @@ void QWindowsUser32DLL::init()
updateLayeredWindowIndirect = (UpdateLayeredWindowIndirect)(library.resolve("UpdateLayeredWindowIndirect"));
isHungAppWindow = (IsHungAppWindow)library.resolve("IsHungAppWindow");
setProcessDPIAware = (SetProcessDPIAware)library.resolve("SetProcessDPIAware");
}
bool QWindowsUser32DLL::initTouch()
@ -252,7 +253,7 @@ struct QWindowsContextPrivate {
QSet<QString> m_registeredWindowClassNames;
HandleBaseWindowHash m_windows;
HDC m_displayContext;
const int m_defaultDPI;
int m_defaultDPI;
QWindowsKeyMapper m_keyMapper;
QWindowsMouseHandler m_mouseHandler;
QWindowsMimeConverter m_mimeConverter;
@ -266,8 +267,6 @@ struct QWindowsContextPrivate {
QWindowsContextPrivate::QWindowsContextPrivate() :
m_systemInfo(0),
m_displayContext(GetDC(0)),
m_defaultDPI(GetDeviceCaps(m_displayContext,LOGPIXELSY)),
m_oleInitializeResult(OleInitialize(NULL)),
m_eventType(QByteArrayLiteral("windows_generic_MSG")),
m_lastActiveWindow(0), m_asyncExpose(0)
@ -276,6 +275,11 @@ QWindowsContextPrivate::QWindowsContextPrivate() :
QWindowsContext::user32dll.init();
QWindowsContext::shell32dll.init();
#endif
// Ensure metrics functions report correct data, QTBUG-30063.
if (QWindowsContext::user32dll.setProcessDPIAware)
QWindowsContext::user32dll.setProcessDPIAware();
m_displayContext = GetDC(0);
m_defaultDPI = GetDeviceCaps(m_displayContext, LOGPIXELSY);
const QSysInfo::WinVersion ver = QSysInfo::windowsVersion();
#ifndef Q_OS_WINCE

4
src/plugins/platforms/windows/qwindowscontext.h
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@ -80,6 +80,7 @@ struct QWindowsUser32DLL
const BLENDFUNCTION *, DWORD);
typedef BOOL (WINAPI *UpdateLayeredWindowIndirect)(HWND, const UPDATELAYEREDWINDOWINFO *);
typedef BOOL (WINAPI *IsHungAppWindow)(HWND);
typedef BOOL (WINAPI *SetProcessDPIAware)();
// Functions missing in Q_CC_GNU stub libraries.
SetLayeredWindowAttributes setLayeredWindowAttributes;
@ -94,6 +95,9 @@ struct QWindowsUser32DLL
UnregisterTouchWindow unregisterTouchWindow;
GetTouchInputInfo getTouchInputInfo;
CloseTouchInputHandle closeTouchInputHandle;
// Windows Vista onwards
SetProcessDPIAware setProcessDPIAware;
};
struct QWindowsShell32DLL