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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QTest>
#include <QtCore/qloggingcategory.h>
#include <private/qguiapplication_p.h>
#include <qpa/qplatformintegration.h>
#if defined(Q_OS_MACOS)
# include <AppKit/AppKit.h>
#elif defined(Q_OS_WIN)
# include <winuser.h>
#endif
Q_LOGGING_CATEGORY(lcTests, "qt.gui.tests")
class NativeWindow
{
Q_DISABLE_COPY(NativeWindow)
public:
NativeWindow();
~NativeWindow();
operator WId() const { return reinterpret_cast<WId>(m_handle); }
void setGeometry(const QRect &rect);
QRect geometry() const;
private:
#if defined(Q_OS_MACOS)
NSView *m_handle = nullptr;
#elif defined(Q_OS_WIN)
HWND m_handle = nullptr;
#endif
};
#if defined(Q_OS_MACOS)
@interface View : NSView
@end
@implementation View
- (instancetype)init
{
if ((self = [super init])) {
qCDebug(lcTests) << "Initialized" << self;
}
return self;
}
- (void)dealloc
{
qCDebug(lcTests) << "Deallocating" << self;
[super dealloc];
}
@end
NativeWindow::NativeWindow()
: m_handle([View new])
{
}
NativeWindow::~NativeWindow()
{
[m_handle release];
}
void NativeWindow::setGeometry(const QRect &rect)
{
m_handle.frame = QRectF(rect).toCGRect();
}
QRect NativeWindow::geometry() const
{
return QRectF::fromCGRect(m_handle.frame).toRect();
}
#elif defined(Q_OS_WIN)
NativeWindow::NativeWindow()
{
static const LPCWSTR className = []{
WNDCLASS wc = {};
wc.lpfnWndProc = DefWindowProc;
wc.hInstance = GetModuleHandle(nullptr);
wc.lpszClassName = L"Native Window";
RegisterClass(&wc);
return wc.lpszClassName;
}();
m_handle = CreateWindowEx(0, className, nullptr, WS_POPUP,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
nullptr, nullptr, GetModuleHandle(nullptr), nullptr);
}
NativeWindow::~NativeWindow()
{
DestroyWindow(m_handle);
}
void NativeWindow::setGeometry(const QRect &rect)
{
MoveWindow(m_handle, rect.x(), rect.y(), rect.width(), rect.height(), false);
}
QRect NativeWindow::geometry() const
{
WINDOWPLACEMENT wp;
wp.length = sizeof(WINDOWPLACEMENT);
if (GetWindowPlacement(m_handle, &wp)) {
RECT r = wp.rcNormalPosition;
return QRect(r.left, r.top, r.right - r.left, r.bottom - r.top);
}
return {};
}
#endif
class tst_ForeignWindow: public QObject
{
Q_OBJECT
private slots:
void initTestCase()
{
auto *platformIntegration = QGuiApplicationPrivate::platformIntegration();
if (!platformIntegration->hasCapability(QPlatformIntegration::ForeignWindows))
QSKIP("This platform does not support foreign windows");
}
void fromWinId();
void initialState();
};
void tst_ForeignWindow::fromWinId()
{
NativeWindow nativeWindow;
QVERIFY(nativeWindow);
std::unique_ptr<QWindow> foreignWindow(QWindow::fromWinId(nativeWindow));
QVERIFY(foreignWindow);
QVERIFY(foreignWindow->flags().testFlag(Qt::ForeignWindow));
QVERIFY(foreignWindow->handle());
// fromWinId does not take (exclusive) ownership of the native window,
// so deleting the foreign window should not be a problem/cause crashes.
foreignWindow.reset();
}
void tst_ForeignWindow::initialState()
{
NativeWindow nativeWindow;
QVERIFY(nativeWindow);
// A foreign window can be used to embed a Qt UI in a foreign window hierarchy,
// in which case the foreign window merely acts as a parent and should not be
// modified, or to embed a foreign window in a Qt UI, in which case the foreign
// window must to be able to re-parent, move, resize, show, etc, so that the
// containing Qt UI can treat it as any other window.
// At the point of creation though, we don't know what the foreign window
// will be used for, so the platform should not assume it can modify the
// window. Any properties set on the native window should persist past
// creation of the foreign window.
const QRect initialGeometry(123, 456, 321, 654);
nativeWindow.setGeometry(initialGeometry);
std::unique_ptr<QWindow> foreignWindow(QWindow::fromWinId(nativeWindow));
QCOMPARE(nativeWindow.geometry(), initialGeometry);
// For extra bonus points, the foreign window should actually
// reflect the state of the native window.
QCOMPARE(foreignWindow->geometry(), initialGeometry);
}
#include <tst_foreignwindow.moc>
QTEST_MAIN(tst_ForeignWindow)
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