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Implement WindowTransparentForInput flag in Windows platform.

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set WS_EX_LAYERED | WS_EX_TRANSPARENT style if the window has
WindowTransparentForInput flag.

Change-Id: I6b0dcf35abb5fc63c800439e9b81ace1070dcad4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
This commit is contained in:
jian liang 2012-06-02 00:35:47 +08:00 committed by Qt by Nokia
parent b87c5cff24
commit 778e2b3bf5
2 changed files with 41 additions and 30 deletions
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70
src/plugins/platforms/windows/qwindowswindow.cpp
View File

@ -205,6 +205,32 @@ static bool shouldShowMaximizeButton(Qt::WindowFlags flags)
return flags & Qt::WindowMaximizeButtonHint;
}
static void setWindowOpacity(HWND hwnd, Qt::WindowFlags flags, qreal level)
{
#ifdef Q_OS_WINCE // maybe needs revisit WS_EX_LAYERED
Q_UNUSED(hwnd);
Q_UNUSED(flags);
Q_UNUSED(level);
#else
const long wl = GetWindowLong(hwnd, GWL_EXSTYLE);
const bool isOpaque = level == 1.0 && !(flags & Qt::WindowTransparentForInput);
if (isOpaque) {
if (wl & WS_EX_LAYERED)
SetWindowLong(hwnd, GWL_EXSTYLE, wl & ~WS_EX_LAYERED);
} else {
if ((wl & WS_EX_LAYERED) == 0)
SetWindowLong(hwnd, GWL_EXSTYLE, wl | WS_EX_LAYERED);
if (flags & Qt::FramelessWindowHint) {
BLENDFUNCTION blend = {AC_SRC_OVER, 0, (int)(255.0 * level), AC_SRC_ALPHA};
QWindowsContext::user32dll.updateLayeredWindow(hwnd, NULL, NULL, NULL, NULL, NULL, 0, &blend, ULW_ALPHA);
} else {
QWindowsContext::user32dll.setLayeredWindowAttributes(hwnd, 0, (int)(level * 255), LWA_ALPHA);
}
}
#endif // !Q_OS_WINCE
}
/*!
\class WindowCreationData
\brief Window creation code.
@ -246,7 +272,7 @@ struct WindowCreationData
void fromWindow(const QWindow *w, const Qt::WindowFlags flags, unsigned creationFlags = 0);
inline WindowData create(const QWindow *w, const QRect &geometry, QString title) const;
inline void applyWindowFlags(HWND hwnd) const;
void initialize(HWND h, bool frameChange) const;
void initialize(HWND h, bool frameChange, qreal opacityLevel) const;
Qt::WindowFlags flags;
HWND parentHandle;
@ -375,6 +401,13 @@ void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flag
} else {
exStyle |= WS_EX_TOOLWINDOW;
}
#ifndef Q_OS_WINCE
// make mouse events fall through this window
// NOTE: WS_EX_TRANSPARENT flag can make mouse inputs fall through a layered window
if (flagsIn & Qt::WindowTransparentForInput)
exStyle |= WS_EX_LAYERED | WS_EX_TRANSPARENT;
#endif
}
}
}
@ -459,7 +492,7 @@ void WindowCreationData::applyWindowFlags(HWND hwnd) const
<< debugWinExStyle(newExStyle);
}
void WindowCreationData::initialize(HWND hwnd, bool frameChange) const
void WindowCreationData::initialize(HWND hwnd, bool frameChange, qreal opacityLevel) const
{
if (desktop || !hwnd)
return;
@ -482,6 +515,8 @@ void WindowCreationData::initialize(HWND hwnd, bool frameChange) const
else
EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_GRAYED);
}
setWindowOpacity(hwnd, flags, opacityLevel);
} else { // child.
SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0, swpFlags);
}
@ -746,7 +781,7 @@ QWindowsWindow::WindowData
WindowCreationData creationData;
creationData.fromWindow(w, parameters.flags);
WindowData result = creationData.create(w, parameters.geometry, title);
creationData.initialize(result.hwnd, false);
creationData.initialize(result.hwnd, false, 1);
return result;
}
@ -1090,7 +1125,8 @@ QWindowsWindow::WindowData QWindowsWindow::setWindowFlags_sys(Qt::WindowFlags wt
WindowCreationData creationData;
creationData.fromWindow(window(), wt, flags);
creationData.applyWindowFlags(m_data.hwnd);
creationData.initialize(m_data.hwnd, true);
creationData.initialize(m_data.hwnd, true, m_opacity);
WindowData result = m_data;
result.flags = creationData.flags;
setFlag(FrameDirty);
@ -1304,34 +1340,10 @@ void QWindowsWindow::setOpacity(qreal level)
if (m_opacity != level) {
m_opacity = level;
if (m_data.hwnd)
setOpacity_sys(level);
setWindowOpacity(m_data.hwnd, m_data.flags, level);
}
}
void QWindowsWindow::setOpacity_sys(qreal level) const
{
#ifdef Q_OS_WINCE // maybe needs revisit WS_EX_LAYERED
Q_UNUSED(level);
#else
const long wl = GetWindowLong(m_data.hwnd, GWL_EXSTYLE);
const bool isOpaque = level == 1.0;
if (isOpaque) {
if (wl & WS_EX_LAYERED)
SetWindowLong(m_data.hwnd, GWL_EXSTYLE, wl & ~WS_EX_LAYERED);
} else {
if ((wl & WS_EX_LAYERED) == 0)
SetWindowLong(m_data.hwnd, GWL_EXSTYLE, wl | WS_EX_LAYERED);
if (m_data.flags & Qt::FramelessWindowHint) {
BLENDFUNCTION blend = {AC_SRC_OVER, 0, (int)(255.0 * level), AC_SRC_ALPHA};
QWindowsContext::user32dll.updateLayeredWindow(m_data.hwnd, NULL, NULL, NULL, NULL, NULL, 0, &blend, ULW_ALPHA);
} else {
QWindowsContext::user32dll.setLayeredWindowAttributes(m_data.hwnd, 0, (int)(level * 255), LWA_ALPHA);
}
}
#endif // !Q_OS_WINCE
}
void QWindowsWindow::requestActivateWindow()
{
if (QWindowsContext::verboseWindows)

1
src/plugins/platforms/windows/qwindowswindow.h
View File

@ -239,7 +239,6 @@ private:
inline WindowData setWindowFlags_sys(Qt::WindowFlags wt, unsigned flags = 0) const;
inline void setWindowState_sys(Qt::WindowState newState);
inline void setParent_sys(const QPlatformWindow *parent) const;
inline void setOpacity_sys(qreal level) const;
inline void setMouseGrabEnabled_sys(bool grab);
void destroyWindow();
void registerDropSite();