diff options
Diffstat (limited to 'src/widgets/widgets/qsplashscreen.cpp')
-rw-r--r-- | src/widgets/widgets/qsplashscreen.cpp | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/src/widgets/widgets/qsplashscreen.cpp b/src/widgets/widgets/qsplashscreen.cpp index 040b7424cf..fcd09908cd 100644 --- a/src/widgets/widgets/qsplashscreen.cpp +++ b/src/widgets/widgets/qsplashscreen.cpp @@ -32,6 +32,8 @@ public: int currAlign; inline QSplashScreenPrivate(); + + void handlePaintEvent(); }; /*! @@ -67,9 +69,9 @@ public: \snippet qsplashscreen/main.cpp 1 The user can hide the splash screen by clicking on it with the - mouse. Since the splash screen is typically displayed before the - event loop has started running, it is necessary to periodically - call QCoreApplication::processEvents() to receive the mouse clicks. + mouse. For mouse handling to work, call QApplication::processEvents() + periodically during startup. + It is sometimes useful to update the splash screen with messages, for example, announcing connections established or modules loaded @@ -201,18 +203,21 @@ void QSplashScreen::clearMessage() repaint(); } -// A copy of Qt Test's qWaitForWindowExposed() and qSleep(). -inline static bool waitForWindowExposed(QWindow *window, int timeout = 1000) +static bool waitForWidgetMapped(QWidget *widget, int timeout = 1000) { enum { TimeOutMs = 10 }; + auto isMapped = [widget](){ + return widget->windowHandle() && widget->windowHandle()->isVisible(); + }; + QElapsedTimer timer; timer.start(); - while (!window->isExposed()) { + while (!isMapped()) { const int remaining = timeout - int(timer.elapsed()); if (remaining <= 0) break; QCoreApplication::processEvents(QEventLoop::AllEvents, remaining); - QCoreApplication::sendPostedEvents(nullptr, QEvent::DeferredDelete); + QCoreApplication::sendPostedEvents(); #if defined(Q_OS_WIN) Sleep(uint(TimeOutMs)); #else @@ -220,7 +225,7 @@ inline static bool waitForWindowExposed(QWindow *window, int timeout = 1000) nanosleep(&ts, nullptr); #endif } - return window->isExposed(); + return isMapped(); } /*! @@ -233,7 +238,7 @@ void QSplashScreen::finish(QWidget *mainWin) if (mainWin) { if (!mainWin->windowHandle()) mainWin->createWinId(); - waitForWindowExposed(mainWin->windowHandle()); + waitForWidgetMapped(mainWin); } close(); } @@ -311,18 +316,33 @@ void QSplashScreen::drawContents(QPainter *painter) } } +void QSplashScreenPrivate::handlePaintEvent() +{ + Q_Q(QSplashScreen); + QPainter painter(q); + painter.setRenderHints(QPainter::SmoothPixmapTransform); + painter.setLayoutDirection(q->layoutDirection()); + if (!pixmap.isNull()) + painter.drawPixmap(QPoint(), pixmap); + q->drawContents(&painter); +} + /*! \reimp */ bool QSplashScreen::event(QEvent *e) { - if (e->type() == QEvent::Paint) { - Q_D(QSplashScreen); - QPainter painter(this); - painter.setRenderHints(QPainter::SmoothPixmapTransform); - painter.setLayoutDirection(layoutDirection()); - if (!d->pixmap.isNull()) - painter.drawPixmap(QPoint(), d->pixmap); - drawContents(&painter); + Q_D(QSplashScreen); + + switch (e->type()) { + case QEvent::Paint: + d->handlePaintEvent(); + break; + case QEvent::Show: + waitForWidgetMapped(this); + break; + default: + break; } + return QWidget::event(e); } |