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qwindowswindow.cpp
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qwindowswindow.cpp
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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwindowswindow.h"
#include "qwindowsnativeimage.h"
#include "qwindowscontext.h"
#include "qwindowsdrag.h"
#include "qwindowsscreen.h"
#ifdef QT_NO_CURSOR
# include "qwindowscursor.h"
#endif
#ifdef QT_OPENGL_ES_2
# include "qwindowseglcontext.h"
#endif
#include <QtGui/QGuiApplication>
#include <QtGui/QScreen>
#include <QtGui/QWindow>
#include <QtGui/QRegion>
#include <private/qsystemlibrary_p.h>
#include <private/qwindow_p.h>
#include <private/qguiapplication_p.h>
#include <qpa/qwindowsysteminterface.h>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
enum {
defaultWindowWidth = 160,
defaultWindowHeight = 160
};
Q_GUI_EXPORT HICON qt_pixmapToWinHICON(const QPixmap &);
static QByteArray debugWinStyle(DWORD style)
{
QByteArray rc = "0x";
rc += QByteArray::number(qulonglong(style), 16);
if (style & WS_POPUP)
rc += " WS_POPUP";
if (style & WS_CHILD)
rc += " WS_CHILD";
if (style & WS_OVERLAPPED)
rc += " WS_OVERLAPPED";
if (style & WS_CLIPSIBLINGS)
rc += " WS_CLIPSIBLINGS";
if (style & WS_CLIPCHILDREN)
rc += " WS_CLIPCHILDREN";
if (style & WS_THICKFRAME)
rc += " WS_THICKFRAME";
if (style & WS_DLGFRAME)
rc += " WS_DLGFRAME";
if (style & WS_SYSMENU)
rc += " WS_SYSMENU";
if (style & WS_MINIMIZEBOX)
rc += " WS_MINIMIZEBOX";
if (style & WS_MAXIMIZEBOX)
rc += " WS_MAXIMIZEBOX";
return rc;
}
static QByteArray debugWinExStyle(DWORD exStyle)
{
QByteArray rc = "0x";
rc += QByteArray::number(qulonglong(exStyle), 16);
if (exStyle & WS_EX_TOOLWINDOW)
rc += " WS_EX_TOOLWINDOW";
if (exStyle & WS_EX_CONTEXTHELP)
rc += " WS_EX_CONTEXTHELP";
if (exStyle & WS_EX_LAYERED)
rc += " WS_EX_LAYERED";
return rc;
}
static QByteArray debugWindowStates(Qt::WindowStates s)
{
QByteArray rc = "0x";
rc += QByteArray::number(int(s), 16);
if (s & Qt::WindowMinimized)
rc += " WindowMinimized";
if (s & Qt::WindowMaximized)
rc += " WindowMaximized";
if (s & Qt::WindowFullScreen)
rc += " WindowFullScreen";
if (s & Qt::WindowActive)
rc += " WindowActive";
return rc;
}
#ifndef Q_OS_WINCE // maybe available on some SDKs revisit WM_GETMINMAXINFO
QDebug operator<<(QDebug d, const MINMAXINFO &i)
{
d.nospace() << "MINMAXINFO maxSize=" << i.ptMaxSize.x << ','
<< i.ptMaxSize.y << " maxpos=" << i.ptMaxPosition.x
<< ',' << i.ptMaxPosition.y << " mintrack="
<< i.ptMinTrackSize.x << ',' << i.ptMinTrackSize.y
<< " maxtrack=" << i.ptMaxTrackSize.x << ','
<< i.ptMaxTrackSize.y;
return d;
}
#endif // !Q_OS_WINCE
static inline QSize qSizeOfRect(const RECT &rect)
{
return QSize(rect.right -rect.left, rect.bottom - rect.top);
}
static inline QRect qrectFromRECT(const RECT &rect)
{
return QRect(QPoint(rect.left, rect.top), qSizeOfRect(rect));
}
static inline RECT RECTfromQRect(const QRect &rect)
{
const int x = rect.left();
const int y = rect.top();
RECT result = { x, y, x + rect.width(), y + rect.height() };
return result;
}
QDebug operator<<(QDebug d, const RECT &r)
{
d.nospace() << "RECT: left/top=" << r.left << ',' << r.top
<< " right/bottom=" << r.right << ',' << r.bottom;
return d;
}
#ifndef Q_OS_WINCE // maybe available on some SDKs revisit WM_NCCALCSIZE
QDebug operator<<(QDebug d, const NCCALCSIZE_PARAMS &p)
{
qDebug().nospace() << "NCCALCSIZE_PARAMS "
<< qrectFromRECT(p.rgrc[0])
<< ' ' << qrectFromRECT(p.rgrc[1]) << ' '
<< qrectFromRECT(p.rgrc[2]);
return d;
}
#endif // !Q_OS_WINCE
// Return the frame geometry relative to the parent
// if there is one.
static inline QRect frameGeometry(HWND hwnd, bool topLevel)
{
RECT rect = { 0, 0, 0, 0 };
GetWindowRect(hwnd, &rect); // Screen coordinates.
const HWND parent = GetParent(hwnd);
if (parent && !topLevel) {
const int width = rect.right - rect.left;
const int height = rect.bottom - rect.top;
POINT leftTop = { rect.left, rect.top };
ScreenToClient(parent, &leftTop);
rect.left = leftTop.x;
rect.top = leftTop.y;
rect.right = leftTop.x + width;
rect.bottom = leftTop.y + height;
}
return qrectFromRECT(rect);
}
static inline QSize clientSize(HWND hwnd)
{
RECT rect = { 0, 0, 0, 0 };
GetClientRect(hwnd, &rect); // Always returns point 0,0, thus unusable for geometry.
return qSizeOfRect(rect);
}
static bool applyBlurBehindWindow(HWND hwnd)
{
#ifdef Q_OS_WINCE
Q_UNUSED(hwnd);
return false;
#else
enum { dwmBbEnable = 0x1, dwmBbBlurRegion = 0x2 };
struct DwmBlurBehind {
DWORD dwFlags;
BOOL fEnable;
HRGN hRgnBlur;
BOOL fTransitionOnMaximized;
};
typedef HRESULT (WINAPI *PtrDwmEnableBlurBehindWindow)(HWND, const DwmBlurBehind*);
typedef HRESULT (WINAPI *PtrDwmIsCompositionEnabled)(BOOL *);
// DWM API is available only from Windows Vista
if (QSysInfo::windowsVersion() < QSysInfo::WV_VISTA)
return false;
static bool functionPointersResolved = false;
static PtrDwmEnableBlurBehindWindow dwmBlurBehind = 0;
static PtrDwmIsCompositionEnabled dwmIsCompositionEnabled = 0;
if (Q_UNLIKELY(!functionPointersResolved)) {
QSystemLibrary library(QStringLiteral("dwmapi"));
if (library.load()) {
dwmBlurBehind = (PtrDwmEnableBlurBehindWindow)(library.resolve("DwmEnableBlurBehindWindow"));
dwmIsCompositionEnabled = (PtrDwmIsCompositionEnabled)(library.resolve("DwmIsCompositionEnabled"));
}
functionPointersResolved = true;
}
if (Q_UNLIKELY(!dwmBlurBehind || !dwmIsCompositionEnabled))
return false;
BOOL compositionEnabled;
if (dwmIsCompositionEnabled(&compositionEnabled) != S_OK)
return false;
DwmBlurBehind blurBehind = {0, 0, 0, 0};
if (compositionEnabled) {
blurBehind.dwFlags = dwmBbEnable | dwmBbBlurRegion;
blurBehind.fEnable = TRUE;
blurBehind.hRgnBlur = CreateRectRgn(0, 0, -1, -1);
} else {
blurBehind.dwFlags = dwmBbEnable;
blurBehind.fEnable = FALSE;
}
const bool result = dwmBlurBehind(hwnd, &blurBehind) == S_OK;
if (blurBehind.hRgnBlur)
DeleteObject(blurBehind.hRgnBlur);
return result;
#endif // Q_OS_WINCE
}
// from qwidget_win.cpp, pass flags separately in case they have been "autofixed".
static bool shouldShowMaximizeButton(const QWindow *w, Qt::WindowFlags flags)
{
if ((flags & Qt::MSWindowsFixedSizeDialogHint) || !(flags & Qt::WindowMaximizeButtonHint))
return false;
// if the user explicitly asked for the maximize button, we try to add
// it even if the window has fixed size.
return (flags & Qt::CustomizeWindowHint) ||
w->maximumSize() == QSize(QWINDOWSIZE_MAX, QWINDOWSIZE_MAX);
}
// Set the WS_EX_LAYERED flag on a HWND if required. This is required for
// translucent backgrounds, not fully opaque windows and for
// Qt::WindowTransparentForInput (in combination with WS_EX_TRANSPARENT).
bool QWindowsWindow::setWindowLayered(HWND hwnd, Qt::WindowFlags flags, bool hasAlpha, qreal opacity)
{
#ifndef Q_OS_WINCE // maybe needs revisiting WS_EX_LAYERED
const LONG exStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
const bool needsLayered = (flags & Qt::WindowTransparentForInput)
|| (hasAlpha && (flags & Qt::FramelessWindowHint)) || opacity < 1.0;
const bool isLayered = (exStyle & WS_EX_LAYERED);
if (needsLayered != isLayered) {
if (needsLayered) {
SetWindowLong(hwnd, GWL_EXSTYLE, exStyle | WS_EX_LAYERED);
} else {
SetWindowLong(hwnd, GWL_EXSTYLE, exStyle & ~WS_EX_LAYERED);
}
}
return needsLayered;
#else // !Q_OS_WINCE
Q_UNUSED(hwnd);
Q_UNUSED(flags);
Q_UNUSED(hasAlpha);
Q_UNUSED(opacity);
return false;
#endif // Q_OS_WINCE
}
static void setWindowOpacity(HWND hwnd, Qt::WindowFlags flags, bool hasAlpha, bool openGL, qreal level)
{
#ifdef Q_OS_WINCE // WINCE does not support that feature and microsoft explicitly warns to use those calls
Q_UNUSED(hwnd);
Q_UNUSED(flags);
Q_UNUSED(hasAlpha);
Q_UNUSED(level);
#else
if (QWindowsWindow::setWindowLayered(hwnd, flags, hasAlpha, level)) {
if (hasAlpha && !openGL && (flags & Qt::FramelessWindowHint)) {
// Non-GL windows with alpha: Use blend function to update.
BLENDFUNCTION blend = {AC_SRC_OVER, 0, (BYTE)(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);
}
} else if (IsWindowVisible(hwnd)) { // Repaint when switching from layered.
InvalidateRect(hwnd, NULL, TRUE);
}
#endif // !Q_OS_WINCE
}
/*!
\class WindowCreationData
\brief Window creation code.
This struct gathers all information required to create a window.
Window creation is split in 3 steps:
\list
\li fromWindow() Gather all required information
\li create() Create the system handle.
\li initialize() Post creation initialization steps.
\endlist
The reason for this split is to also enable changing the QWindowFlags
by calling:
\list
\li fromWindow() Gather information and determine new system styles
\li applyWindowFlags() to apply the new window system styles.
\li initialize() Post creation initialization steps.
\endlist
Contains the window creation code formerly in qwidget_win.cpp.
\sa QWindowCreationContext
\internal
\ingroup qt-lighthouse-win
*/
struct WindowCreationData
{
typedef QWindowsWindow::WindowData WindowData;
enum Flags { ForceChild = 0x1, ForceTopLevel = 0x2 };
WindowCreationData() : parentHandle(0), type(Qt::Widget), style(0), exStyle(0),
topLevel(false), popup(false), dialog(false), desktop(false),
tool(false), embedded(false), hasAlpha(false) {}
void fromWindow(const QWindow *w, const Qt::WindowFlags flags, unsigned creationFlags = 0);
inline WindowData create(const QWindow *w, const WindowData &data, QString title) const;
inline void applyWindowFlags(HWND hwnd) const;
void initialize(HWND h, bool frameChange, qreal opacityLevel) const;
Qt::WindowFlags flags;
HWND parentHandle;
Qt::WindowType type;
unsigned style;
unsigned exStyle;
bool isGL;
bool topLevel;
bool popup;
bool dialog;
bool desktop;
bool tool;
bool embedded;
bool hasAlpha;
};
QDebug operator<<(QDebug debug, const WindowCreationData &d)
{
debug.nospace() << QWindowsWindow::debugWindowFlags(d.flags)
<< " GL=" << d.isGL << " topLevel=" << d.topLevel << " popup="
<< d.popup << " dialog=" << d.dialog << " desktop=" << d.desktop
<< " embedded=" << d.embedded
<< " tool=" << d.tool << " style=" << debugWinStyle(d.style)
<< " exStyle=" << debugWinExStyle(d.exStyle)
<< " parent=" << d.parentHandle;
return debug;
}
// Fix top level window flags in case only the type flags are passed.
static inline void fixTopLevelWindowFlags(Qt::WindowFlags &flags)
{
switch (flags) {
case Qt::Window:
flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint
|Qt::WindowMaximizeButtonHint|Qt::WindowCloseButtonHint;
break;
case Qt::Dialog:
flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowContextHelpButtonHint | Qt::WindowCloseButtonHint;
break;
case Qt::Tool:
flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint;
break;
default:
break;
}
}
void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flagsIn,
unsigned creationFlags)
{
isGL = w->surfaceType() == QWindow::OpenGLSurface;
hasAlpha = w->format().hasAlpha();
flags = flagsIn;
// Sometimes QWindow doesn't have a QWindow parent but does have a native parent window,
// e.g. in case of embedded ActiveQt servers. They should not be considered a top-level
// windows in such cases.
QVariant prop = w->property("_q_embedded_native_parent_handle");
if (prop.isValid()) {
embedded = true;
parentHandle = (HWND)prop.value<WId>();
}
if (creationFlags & ForceChild) {
topLevel = false;
} else if (embedded) {
// Embedded native windows (for example Active X server windows) are by
// definition never toplevel, even though they do not have QWindow parents.
topLevel = false;
} else {
topLevel = (creationFlags & ForceTopLevel) ? true : w->isTopLevel();
}
if (topLevel)
fixTopLevelWindowFlags(flags);
type = static_cast<Qt::WindowType>(int(flags) & Qt::WindowType_Mask);
switch (type) {
case Qt::Dialog:
case Qt::Sheet:
dialog = true;
break;
case Qt::Drawer:
case Qt::Tool:
tool = true;
break;
case Qt::Popup:
popup = true;
break;
case Qt::Desktop:
desktop = true;
break;
default:
break;
}
if ((flags & Qt::MSWindowsFixedSizeDialogHint))
dialog = true;
// Parent: Use transient parent for top levels.
if (popup) {
flags |= Qt::WindowStaysOnTopHint; // a popup stays on top, no parent.
} else if (!embedded) {
if (const QWindow *parentWindow = topLevel ? w->transientParent() : w->parent())
parentHandle = QWindowsWindow::handleOf(parentWindow);
}
if (popup || (type == Qt::ToolTip) || (type == Qt::SplashScreen)) {
style = WS_POPUP;
} else if (topLevel && !desktop) {
if (flags & Qt::FramelessWindowHint)
style = WS_POPUP; // no border
else if (flags & Qt::WindowTitleHint)
style = WS_OVERLAPPED;
else
style = 0;
} else {
style = WS_CHILD;
}
if (!desktop) {
// if (!testAttribute(Qt::WA_PaintUnclipped))
// ### Commented out for now as it causes some problems, but
// this should be correct anyway, so dig some more into this
#ifdef Q_FLATTEN_EXPOSE
if (isGL)
style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; // see SetPixelFormat
#else
style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN ;
#endif
if (topLevel) {
if ((type == Qt::Window || dialog || tool)) {
if (!(flags & Qt::FramelessWindowHint)) {
style |= WS_POPUP;
if (flags & Qt::MSWindowsFixedSizeDialogHint) {
style |= WS_DLGFRAME;
} else {
style |= WS_THICKFRAME;
}
if (flags & Qt::WindowTitleHint)
style |= WS_CAPTION; // Contains WS_DLGFRAME
}
if (flags & Qt::WindowSystemMenuHint)
style |= WS_SYSMENU;
if (flags & Qt::WindowMinimizeButtonHint)
style |= WS_MINIMIZEBOX;
if (shouldShowMaximizeButton(w, flags))
style |= WS_MAXIMIZEBOX;
if (tool)
exStyle |= WS_EX_TOOLWINDOW;
if (flags & Qt::WindowContextHelpButtonHint)
exStyle |= WS_EX_CONTEXTHELP;
} 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
}
}
}
QWindowsWindow::WindowData
WindowCreationData::create(const QWindow *w, const WindowData &data, QString title) const
{
typedef QSharedPointer<QWindowCreationContext> QWindowCreationContextPtr;
WindowData result;
result.flags = flags;
if (desktop) { // desktop widget. No frame, hopefully?
result.hwnd = GetDesktopWindow();
result.geometry = frameGeometry(result.hwnd, true);
result.embedded = false;
if (QWindowsContext::verboseWindows)
qDebug().nospace() << "Created desktop window " << w << result.hwnd;
return result;
}
if ((flags & Qt::WindowType_Mask) == Qt::ForeignWindow) {
result.hwnd = reinterpret_cast<HWND>(w->winId());
Q_ASSERT(result.hwnd);
const LONG_PTR style = GetWindowLongPtr(result.hwnd, GWL_STYLE);
const LONG_PTR exStyle = GetWindowLongPtr(result.hwnd, GWL_EXSTYLE);
result.geometry = frameGeometry(result.hwnd, !GetParent(result.hwnd));
result.frame = QWindowsGeometryHint::frame(style, exStyle);
result.embedded = false;
if (QWindowsContext::verboseWindows)
qDebug() << "Foreign window: " << w << result.hwnd << result.geometry << result.frame;
return result;
}
const HINSTANCE appinst = (HINSTANCE)GetModuleHandle(0);
const QString windowClassName = QWindowsContext::instance()->registerWindowClass(w, isGL);
QRect rect = QPlatformWindow::initialGeometry(w, data.geometry, defaultWindowWidth, defaultWindowHeight);
if (title.isEmpty() && (result.flags & Qt::WindowTitleHint))
title = topLevel ? qAppName() : w->objectName();
const wchar_t *titleUtf16 = reinterpret_cast<const wchar_t *>(title.utf16());
const wchar_t *classNameUtf16 = reinterpret_cast<const wchar_t *>(windowClassName.utf16());
// Capture events before CreateWindowEx() returns. The context is cleared in
// the QWindowsWindow constructor.
const QWindowCreationContextPtr context(new QWindowCreationContext(w, rect, data.customMargins, style, exStyle));
QWindowsContext::instance()->setWindowCreationContext(context);
if (QWindowsContext::verboseWindows)
qDebug().nospace()
<< "CreateWindowEx: " << w << *this
<< " class=" <<windowClassName << " title=" << title
<< "\nrequested: " << rect << ": "
<< context->frameWidth << 'x' << context->frameHeight
<< '+' << context->frameX << '+' << context->frameY
<< " custom margins: " << context->customMargins;
result.hwnd = CreateWindowEx(exStyle, classNameUtf16, titleUtf16,
style,
context->frameX, context->frameY,
context->frameWidth, context->frameHeight,
parentHandle, NULL, appinst, NULL);
if (QWindowsContext::verboseWindows)
qDebug().nospace()
<< "CreateWindowEx: returns " << w << ' ' << result.hwnd << " obtained geometry: "
<< context->obtainedGeometry << context->margins;
if (!result.hwnd) {
qErrnoWarning("%s: CreateWindowEx failed", __FUNCTION__);
return result;
}
result.geometry = context->obtainedGeometry;
result.frame = context->margins;
result.embedded = embedded;
result.customMargins = context->customMargins;
if (isGL && hasAlpha)
applyBlurBehindWindow(result.hwnd);
return result;
}
void WindowCreationData::applyWindowFlags(HWND hwnd) const
{
// Keep enabled and visible from the current style.
const LONG_PTR oldStyle = GetWindowLongPtr(hwnd, GWL_STYLE);
const LONG_PTR oldExStyle = GetWindowLongPtr(hwnd, GWL_EXSTYLE);
const LONG_PTR newStyle = style | (oldStyle & (WS_DISABLED|WS_VISIBLE));
if (oldStyle != newStyle)
SetWindowLongPtr(hwnd, GWL_STYLE, newStyle);
const LONG_PTR newExStyle = exStyle;
if (newExStyle != oldExStyle)
SetWindowLongPtr(hwnd, GWL_EXSTYLE, newExStyle);
if (QWindowsContext::verboseWindows)
qDebug().nospace() << __FUNCTION__ << hwnd << *this
<< "\n Style from " << debugWinStyle(oldStyle) << "\n to "
<< debugWinStyle(newStyle) << "\n ExStyle from "
<< debugWinExStyle(oldExStyle) << " to "
<< debugWinExStyle(newExStyle);
}
void WindowCreationData::initialize(HWND hwnd, bool frameChange, qreal opacityLevel) const
{
if (desktop || !hwnd)
return;
UINT swpFlags = SWP_NOMOVE | SWP_NOSIZE;
if (frameChange)
swpFlags |= SWP_FRAMECHANGED;
if (topLevel) {
swpFlags |= SWP_NOACTIVATE;
if ((flags & Qt::WindowStaysOnTopHint) || (type == Qt::ToolTip)) {
SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, swpFlags);
if (flags & Qt::WindowStaysOnBottomHint)
qWarning() << "QWidget: Incompatible window flags: the window can't be on top and on bottom at the same time";
} else if (flags & Qt::WindowStaysOnBottomHint) {
SetWindowPos(hwnd, HWND_BOTTOM, 0, 0, 0, 0, swpFlags);
} else if (frameChange) { // Force WM_NCCALCSIZE with wParam=1 in case of custom margins.
SetWindowPos(hwnd, 0, 0, 0, 0, 0, swpFlags);
}
if (flags & (Qt::CustomizeWindowHint|Qt::WindowTitleHint)) {
HMENU systemMenu = GetSystemMenu(hwnd, FALSE);
if (flags & Qt::WindowCloseButtonHint)
EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_ENABLED);
else
EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_GRAYED);
}
setWindowOpacity(hwnd, flags, hasAlpha, isGL, opacityLevel);
} else { // child.
SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0, swpFlags);
}
}
/*!
\class QWindowsGeometryHint
\brief Stores geometry constraints and provides utility functions.
Geometry constraints ready to apply to a MINMAXINFO taking frame
into account.
\internal
\ingroup qt-lighthouse-win
*/
#define QWINDOWSIZE_MAX ((1<<24)-1)
QWindowsGeometryHint::QWindowsGeometryHint(const QWindow *w, const QMargins &cm) :
minimumSize(w->minimumSize()),
maximumSize(w->maximumSize()),
customMargins(cm)
{
}
bool QWindowsGeometryHint::validSize(const QSize &s) const
{
const int width = s.width();
const int height = s.height();
return width >= minimumSize.width() && width <= maximumSize.width()
&& height >= minimumSize.height() && height <= maximumSize.height();
}
QMargins QWindowsGeometryHint::frame(DWORD style, DWORD exStyle)
{
RECT rect = {0,0,0,0};
#ifndef Q_OS_WINCE
style &= ~(WS_OVERLAPPED); // Not permitted, see docs.
#endif
if (!AdjustWindowRectEx(&rect, style, FALSE, exStyle))
qErrnoWarning("%s: AdjustWindowRectEx failed", __FUNCTION__);
const QMargins result(qAbs(rect.left), qAbs(rect.top),
qAbs(rect.right), qAbs(rect.bottom));
if (QWindowsContext::verboseWindows)
qDebug().nospace() << __FUNCTION__ << " style= 0x"
<< QString::number(style, 16)
<< " exStyle=0x" << QString::number(exStyle, 16) << ' ' << rect << ' ' << result;
return result;
}
bool QWindowsGeometryHint::handleCalculateSize(const QMargins &customMargins, const MSG &msg, LRESULT *result)
{
#ifndef Q_OS_WINCE
// NCCALCSIZE_PARAMS structure if wParam==TRUE
if (!msg.wParam || customMargins.isNull())
return false;
*result = DefWindowProc(msg.hwnd, msg.message, msg.wParam, msg.lParam);
NCCALCSIZE_PARAMS *ncp = reinterpret_cast<NCCALCSIZE_PARAMS *>(msg.lParam);
const RECT oldClientArea = ncp->rgrc[0];
ncp->rgrc[0].left += customMargins.left();
ncp->rgrc[0].top += customMargins.top();
ncp->rgrc[0].right -= customMargins.right();
ncp->rgrc[0].bottom -= customMargins.bottom();
result = 0;
if (QWindowsContext::verboseWindows)
qDebug() << __FUNCTION__ << oldClientArea << '+' << customMargins << "-->"
<< ncp->rgrc[0] << ' ' << ncp->rgrc[1] << ' ' << ncp->rgrc[2]
<< ' ' << ncp->lppos->cx << ',' << ncp->lppos->cy;
return true;
#else
Q_UNUSED(customMargins)
Q_UNUSED(msg)
Q_UNUSED(result)
return false;
#endif
}
#ifndef Q_OS_WINCE
void QWindowsGeometryHint::applyToMinMaxInfo(HWND hwnd, MINMAXINFO *mmi) const
{
return applyToMinMaxInfo(GetWindowLong(hwnd, GWL_STYLE),
GetWindowLong(hwnd, GWL_EXSTYLE), mmi);
}
void QWindowsGeometryHint::applyToMinMaxInfo(DWORD style, DWORD exStyle, MINMAXINFO *mmi) const
{
if (QWindowsContext::verboseWindows)
qDebug().nospace() << '>' << __FUNCTION__ << '<' << " min="
<< minimumSize.width() << ',' << minimumSize.height()
<< " max=" << maximumSize.width() << ',' << maximumSize.height()
<< " in " << *mmi;
const QMargins margins = QWindowsGeometryHint::frame(style, exStyle);
const int frameWidth = margins.left() + margins.right() + customMargins.left() + customMargins.right();
const int frameHeight = margins.top() + margins.bottom() + customMargins.top() + customMargins.bottom();
if (minimumSize.width() > 0)
mmi->ptMinTrackSize.x = minimumSize.width() + frameWidth;
if (minimumSize.height() > 0)
mmi->ptMinTrackSize.y = minimumSize.height() + frameHeight;
const int maximumWidth = qMax(maximumSize.width(), minimumSize.width());
const int maximumHeight = qMax(maximumSize.height(), minimumSize.height());
if (maximumWidth < QWINDOWSIZE_MAX)
mmi->ptMaxTrackSize.x = maximumWidth + frameWidth;
// windows with title bar have an implicit size limit of 112 pixels
if (maximumHeight < QWINDOWSIZE_MAX)
mmi->ptMaxTrackSize.y = qMax(maximumHeight + frameHeight, 112);
if (QWindowsContext::verboseWindows)
qDebug().nospace() << '<' << __FUNCTION__
<< " frame=" << margins << ' ' << frameWidth << ',' << frameHeight
<< " out " << *mmi;
}
#endif // !Q_OS_WINCE
bool QWindowsGeometryHint::positionIncludesFrame(const QWindow *w)
{
return qt_window_private(const_cast<QWindow *>(w))->positionPolicy
== QWindowPrivate::WindowFrameInclusive;
}
/*!
\class QWindowCreationContext
\brief Active Context for creating windows.
There is a phase in window creation (WindowCreationData::create())
in which events are sent before the system API CreateWindowEx() returns
the handle. These cannot be handled by the platform window as the association
of the unknown handle value to the window does not exist yet and as not
to trigger recursive handle creation, etc.
In that phase, an instance of QWindowCreationContext is set on
QWindowsContext.
QWindowCreationContext stores the information to answer the initial
WM_GETMINMAXINFO and obtains the corrected size/position.
\sa WindowCreationData, QWindowsContext
\internal
\ingroup qt-lighthouse-win
*/
QWindowCreationContext::QWindowCreationContext(const QWindow *w,
const QRect &geometry,
const QMargins &cm,
DWORD style_, DWORD exStyle_) :
geometryHint(w, cm), style(style_), exStyle(exStyle_),
requestedGeometry(geometry), obtainedGeometry(geometry),
margins(QWindowsGeometryHint::frame(style, exStyle)), customMargins(cm),
frameX(CW_USEDEFAULT), frameY(CW_USEDEFAULT),
frameWidth(CW_USEDEFAULT), frameHeight(CW_USEDEFAULT)
{
// Geometry of toplevels does not consider window frames.
// TODO: No concept of WA_wasMoved yet that would indicate a
// CW_USEDEFAULT unless set. For now, assume that 0,0 means 'default'
// for toplevels.
if (geometry.isValid()) {
frameX = geometry.x();
frameY = geometry.y();
const QMargins effectiveMargins = margins + customMargins;
frameWidth = effectiveMargins.left() + geometry.width() + effectiveMargins.right();
frameHeight = effectiveMargins.top() + geometry.height() + effectiveMargins.bottom();
const bool isDefaultPosition = !frameX && !frameY && w->isTopLevel();
if (!QWindowsGeometryHint::positionIncludesFrame(w) && !isDefaultPosition) {
frameX -= effectiveMargins.left();
frameY -= effectiveMargins.top();
}
}
if (QWindowsContext::verboseWindows)
qDebug().nospace()
<< __FUNCTION__ << ' ' << w << geometry
<< " pos incl. frame" << QWindowsGeometryHint::positionIncludesFrame(w)
<< " frame: " << frameWidth << 'x' << frameHeight << '+'
<< frameX << '+' << frameY
<< " min" << geometryHint.minimumSize
<< " max" << geometryHint.maximumSize
<< " custom margins " << customMargins;
}
/*!
\class QWindowsWindow
\brief Raster or OpenGL Window.
\list
\li Raster type: handleWmPaint() is implemented to
to bitblt the image. The DC can be accessed
via getDC/Relase DC, which has a special handling
when within a paint event (in that case, the DC obtained
from BeginPaint() is returned).
\li Open GL: The first time QWindowsGLContext accesses
the handle, it sets up the pixelformat on the DC
which in turn sets it on the window (see flag
PixelFormatInitialized).
handleWmPaint() is empty (although required).
\endlist
\internal
\ingroup qt-lighthouse-win
*/
QWindowsWindow::QWindowsWindow(QWindow *aWindow, const WindowData &data) :
QPlatformWindow(aWindow),
m_data(data),
m_flags(WithinCreate),
m_hdc(0),
m_windowState(Qt::WindowNoState),
m_opacity(1.0),
m_dropTarget(0),
m_savedStyle(0),
m_format(aWindow->format()),
#ifdef QT_OPENGL_ES_2
m_eglSurface(0),
#endif
#ifdef Q_OS_WINCE
m_previouslyHidden(false),
#endif
m_iconSmall(0),
m_iconBig(0)
{
// Clear the creation context as the window can be found in QWindowsContext's map.
QWindowsContext::instance()->setWindowCreationContext(QSharedPointer<QWindowCreationContext>());
QWindowsContext::instance()->addWindow(m_data.hwnd, this);
const Qt::WindowType type = aWindow->type();
if (type == Qt::Desktop)
return; // No further handling for Qt::Desktop
if (aWindow->surfaceType() == QWindow::OpenGLSurface) {
setFlag(OpenGLSurface);
#ifdef QT_OPENGL_ES_2
setFlag(OpenGL_ES2);
#endif
}
if (aWindow->isTopLevel()) {
switch (type) {
case Qt::Window:
case Qt::Dialog:
case Qt::Sheet:
case Qt::Drawer:
case Qt::Popup:
case Qt::Tool:
registerDropSite();
break;
default:
break;
}
}
#ifndef Q_OS_WINCE
if (QWindowsContext::instance()->systemInfo() & QWindowsContext::SI_SupportsTouch) {
if (QWindowsContext::user32dll.registerTouchWindow(m_data.hwnd, 0)) {
setFlag(TouchRegistered);
} else {
qErrnoWarning("RegisterTouchWindow() failed for window '%s'.", qPrintable(aWindow->objectName()));
}
}
#endif // !Q_OS_WINCE
setWindowState(aWindow->windowState());
const qreal opacity = qt_window_private(aWindow)->opacity;
if (!qFuzzyCompare(opacity, qreal(1.0)))
setOpacity(opacity);
if (aWindow->isTopLevel())
setWindowIcon(aWindow->icon());
clearFlag(WithinCreate);
}
QWindowsWindow::~QWindowsWindow()
{
setFlag(WithinDestroy);
#ifndef Q_OS_WINCE
if (testFlag(TouchRegistered))
QWindowsContext::user32dll.unregisterTouchWindow(m_data.hwnd);
#endif // !Q_OS_WINCE
destroyWindow();
destroyIcon();
}
void QWindowsWindow::fireExpose(const QRegion ®ion, bool force)
{
if (region.isEmpty() && !force)
clearFlag(Exposed);
else
setFlag(Exposed);
QWindowSystemInterface::handleExposeEvent(window(), region);
}
void QWindowsWindow::destroyWindow()
{
if (QWindowsContext::verboseIntegration || QWindowsContext::verboseWindows)
qDebug() << __FUNCTION__ << this << window() << m_data.hwnd;
if (m_data.hwnd) { // Stop event dispatching before Window is destroyed.
setFlag(WithinDestroy);
QWindowsContext *context = QWindowsContext::instance();
if (context->windowUnderMouse() == window())
context->clearWindowUnderMouse();
if (hasMouseCapture())
setMouseGrabEnabled(false);
unregisterDropSite();
#ifdef QT_OPENGL_ES_2
if (m_eglSurface) {
if (QWindowsContext::verboseGL)
qDebug("%s: Freeing EGL surface %p, this = %p",
__FUNCTION__, m_eglSurface, this);
eglDestroySurface(m_staticEglContext->display(), m_eglSurface);
m_eglSurface = 0;
}
#endif
#ifdef Q_OS_WINCE
if ((m_windowState & Qt::WindowFullScreen) && !m_previouslyHidden) {
HWND handle = FindWindow(L"HHTaskBar", L"");
if (handle) {
ShowWindow(handle, SW_SHOW);
}
}
#endif // !Q_OS_WINCE
if (m_data.hwnd != GetDesktopWindow() && window()->type() != Qt::ForeignWindow)
DestroyWindow(m_data.hwnd);
context->removeWindow(m_data.hwnd);
m_data.hwnd = 0;
}
}
void QWindowsWindow::registerDropSite()
{
#ifndef QT_NO_CLIPBOARD
# ifndef QT_NO_DRAGANDDROP
if (m_data.hwnd && !m_dropTarget) {
m_dropTarget = new QWindowsOleDropTarget(window());
RegisterDragDrop(m_data.hwnd, m_dropTarget);
CoLockObjectExternal(m_dropTarget, true, true);
}
# endif // !QT_NO_DRAGANDDROP
#endif // !QT_NO_CLIPBOARD
}
void QWindowsWindow::unregisterDropSite()
{