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SUSE:SLE-12-SP2:GA
libqt5-qtbase.2170
xcb-notify-when-the-primary-screen-changes.patch
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File xcb-notify-when-the-primary-screen-changes.patch of Package libqt5-qtbase.2170
From 8cbaea441a8c9adea6ba804b76bf3bd1e79f77b7 Mon Sep 17 00:00:00 2001 From: Aleix Pol <aleixpol@kde.org> Date: Fri, 4 Sep 2015 16:52:04 +0200 Subject: [PATCH] Notify when the primary screen changes Makes it possible to notify that the QGuiApplication::primaryScreen has changed. XCB backend adopts the new API, as it was accessing QGuiApplication private API directly. Change-Id: Icde05c44138265f865fa42d2cd6974c552fdc5e2 Task-number: QTBUG-38404 Task-number: QTBUG-40659 Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com> Reviewed-by: Shawn Rutledge <shawn.rutledge@theqtcompany.com> --- src/gui/kernel/qguiapplication.cpp | 12 +++++++++ src/gui/kernel/qguiapplication.h | 2 ++ src/gui/kernel/qplatformintegration.cpp | 39 +++++++++++++++++++++++++++- src/gui/kernel/qplatformintegration.h | 4 +++ src/gui/kernel/qplatformscreen.cpp | 2 +- src/plugins/platforms/xcb/qxcbconnection.cpp | 9 +++---- src/widgets/kernel/qdesktopwidget.cpp | 1 + src/widgets/kernel/qdesktopwidget.h | 1 + src/widgets/kernel/qdesktopwidget.qdoc | 14 ++++++++++ 9 files changed, 76 insertions(+), 8 deletions(-) diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp index d0aab73..87bd7ea 100644 --- a/src/gui/kernel/qguiapplication.cpp +++ b/src/gui/kernel/qguiapplication.cpp @@ -921,6 +921,18 @@ QList<QScreen *> QGuiApplication::screens() \since 5.4 */ +/*! + \fn void QGuiApplication::primaryScreenChanged(QScreen *screen) + + This signal is emitted whenever the primary \a screen changes. This way + applications can keep track of the primaryScreen and react if there is a + new primary screen. + + \sa primaryScreen + + \since 5.6 +*/ + /*! Returns the highest screen device pixel ratio found on diff --git a/src/gui/kernel/qguiapplication.h b/src/gui/kernel/qguiapplication.h index c89268d..d995387 100644 --- a/src/gui/kernel/qguiapplication.h +++ b/src/gui/kernel/qguiapplication.h @@ -70,6 +70,7 @@ class Q_GUI_EXPORT QGuiApplication : public QCoreApplication Q_PROPERTY(Qt::LayoutDirection layoutDirection READ layoutDirection WRITE setLayoutDirection NOTIFY layoutDirectionChanged) Q_PROPERTY(QString platformName READ platformName STORED false) Q_PROPERTY(bool quitOnLastWindowClosed READ quitOnLastWindowClosed WRITE setQuitOnLastWindowClosed) + Q_PROPERTY(QScreen *primaryScreen READ primaryScreen NOTIFY primaryScreenChanged STORED false) public: #ifdef Q_QDOC @@ -158,6 +159,7 @@ Q_SIGNALS: void fontDatabaseChanged(); void screenAdded(QScreen *screen); void screenRemoved(QScreen *screen); + void primaryScreenChanged(QScreen *screen); void lastWindowClosed(); void focusObjectChanged(QObject *focusObject); void focusWindowChanged(QWindow *focusWindow); diff --git a/src/gui/kernel/qplatformintegration.cpp b/src/gui/kernel/qplatformintegration.cpp index e935907..457a420 100644 --- a/src/gui/kernel/qplatformintegration.cpp +++ b/src/gui/kernel/qplatformintegration.cpp @@ -456,6 +456,24 @@ void QPlatformIntegration::screenAdded(QPlatformScreen *ps, bool isPrimary) QGuiApplicationPrivate::screen_list.append(screen); } emit qGuiApp->screenAdded(screen); + + if (isPrimary) + emit qGuiApp->primaryScreenChanged(screen); +} + +/*! + Just removes the screen, call destroyScreen instead. + + \sa destroyScreen() +*/ + +void QPlatformIntegration::removeScreen(QScreen *screen) +{ + const bool wasPrimary = (!QGuiApplicationPrivate::screen_list.isEmpty() && QGuiApplicationPrivate::screen_list[0] == screen); + QGuiApplicationPrivate::screen_list.removeOne(screen); + + if (wasPrimary && qGuiApp && !QGuiApplicationPrivate::screen_list.isEmpty()) + emit qGuiApp->primaryScreenChanged(QGuiApplicationPrivate::screen_list[0]); } /*! @@ -469,11 +487,30 @@ void QPlatformIntegration::screenAdded(QPlatformScreen *ps, bool isPrimary) void QPlatformIntegration::destroyScreen(QPlatformScreen *screen) { QScreen *qScreen = screen->screen(); - QGuiApplicationPrivate::screen_list.removeOne(qScreen); + removeScreen(qScreen); delete qScreen; delete screen; } +/*! + Should be called whenever the primary screen changes. + + When the screen specified as primary changes, this method will notify + QGuiApplication and emit the QGuiApplication::primaryScreenChanged signal. + */ + +void QPlatformIntegration::setPrimaryScreen(QPlatformScreen *newPrimary) +{ + QScreen* newPrimaryScreen = newPrimary->screen(); + int idx = QGuiApplicationPrivate::screen_list.indexOf(newPrimaryScreen); + Q_ASSERT(idx >= 0); + if (idx == 0) + return; + + QGuiApplicationPrivate::screen_list.swap(0, idx); + emit qGuiApp->primaryScreenChanged(newPrimaryScreen); +} + QStringList QPlatformIntegration::themeNames() const { return QStringList(); diff --git a/src/gui/kernel/qplatformintegration.h b/src/gui/kernel/qplatformintegration.h index 2aa502b..00c50a9 100644 --- a/src/gui/kernel/qplatformintegration.h +++ b/src/gui/kernel/qplatformintegration.h @@ -172,9 +172,13 @@ public: virtual QOpenGLContext::OpenGLModuleType openGLModuleType(); #endif virtual void setApplicationIcon(const QIcon &icon) const; + + void removeScreen(QScreen *screen); + protected: void screenAdded(QPlatformScreen *screen, bool isPrimary = false); void destroyScreen(QPlatformScreen *screen); + void setPrimaryScreen(QPlatformScreen *newPrimary); }; QT_END_NAMESPACE diff --git a/src/gui/kernel/qplatformscreen.cpp b/src/gui/kernel/qplatformscreen.cpp index 2fb53fe..d1d8eba 100644 --- a/src/gui/kernel/qplatformscreen.cpp +++ b/src/gui/kernel/qplatformscreen.cpp @@ -56,7 +56,7 @@ QPlatformScreen::~QPlatformScreen() Q_D(QPlatformScreen); if (d->screen) { qWarning("Manually deleting a QPlatformScreen. Call QPlatformIntegration::destroyScreen instead."); - QGuiApplicationPrivate::screen_list.removeOne(d->screen); + QGuiApplicationPrivate::platformIntegration()->removeScreen(d->screen); delete d->screen; } } diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp index e612cff..5fd0df5 100644 --- a/src/plugins/platforms/xcb/qxcbconnection.cpp +++ b/src/plugins/platforms/xcb/qxcbconnection.cpp @@ -305,13 +305,10 @@ void QXcbConnection::updateScreens(const xcb_randr_notify_event_t *event) screen->updateRefreshRate(output.mode); // If the screen became primary, reshuffle the order in QGuiApplicationPrivate - // TODO: add a proper mechanism for updating primary screen if (!wasPrimary && screen->isPrimary()) { - QScreen *realScreen = static_cast<QPlatformScreen*>(screen)->screen(); - QGuiApplicationPrivate::screen_list.removeOne(realScreen); - QGuiApplicationPrivate::screen_list.prepend(realScreen); - m_screens.removeOne(screen); - m_screens.prepend(screen); + const int idx = m_screens.indexOf(screen); + m_screens.swap(0, idx); + QXcbIntegration::instance()->setPrimaryScreen(screen); } qCDebug(lcQpaScreen) << "output has changed" << screen; } diff --git a/src/widgets/kernel/qdesktopwidget.cpp b/src/widgets/kernel/qdesktopwidget.cpp index 9471602..b88b3cc 100644 --- a/src/widgets/kernel/qdesktopwidget.cpp +++ b/src/widgets/kernel/qdesktopwidget.cpp @@ -134,6 +134,7 @@ QDesktopWidget::QDesktopWidget() setObjectName(QLatin1String("desktop")); d->_q_updateScreens(); connect(qApp, SIGNAL(screenAdded(QScreen*)), this, SLOT(_q_updateScreens())); + connect(qApp, SIGNAL(primaryScreenChanged(QScreen*)), this, SIGNAL(primaryScreenChanged())); } QDesktopWidget::~QDesktopWidget() diff --git a/src/widgets/kernel/qdesktopwidget.h b/src/widgets/kernel/qdesktopwidget.h index c0cc4f1..f5f7d69 100644 --- a/src/widgets/kernel/qdesktopwidget.h +++ b/src/widgets/kernel/qdesktopwidget.h @@ -77,6 +77,7 @@ Q_SIGNALS: void resized(int); void workAreaResized(int); void screenCountChanged(int); + void primaryScreenChanged(); protected: void resizeEvent(QResizeEvent *e) Q_DECL_OVERRIDE; diff --git a/src/widgets/kernel/qdesktopwidget.qdoc b/src/widgets/kernel/qdesktopwidget.qdoc index 31a99f1..d1a6eca 100644 --- a/src/widgets/kernel/qdesktopwidget.qdoc +++ b/src/widgets/kernel/qdesktopwidget.qdoc @@ -271,3 +271,17 @@ \sa screenCount */ + + +/*! + \fn void QDesktopWidget::primaryScreenChanged() + + \since 5.6 + + \brief This signal is emitted whenever the primary screen changes. + + \note This doesn't mean the QDesktopWidget::primaryScreen index will + necessarily be different, but now it will refer to the new primary screen. + + \sa primaryScreen, screenGeometry() +*/ -- 2.6.3
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