qsplashscreen.cpp

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#include "qsplashscreen.h"

#ifndef QT_NO_SPLASHSCREEN

#include "qapplication.h"
#include "qdesktopwidget.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qtextdocument.h"
#include "qtextcursor.h"
#include <QtCore/qdebug.h>
#include <private/qwidget_p.h>

QT_BEGIN_NAMESPACE

class QSplashScreenPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(QSplashScreen)
public:
    QPixmap pixmap;
    QString currStatus;
    QColor currColor;
    int currAlign;

    inline QSplashScreenPrivate();
};

QSplashScreen::QSplashScreen(const QPixmap &pixmap, Qt::WindowFlags f)
    : QWidget(*(new QSplashScreenPrivate()), 0, Qt::SplashScreen | Qt::FramelessWindowHint | f)
{
    setPixmap(pixmap);  // Does an implicit repaint
}

QSplashScreen::QSplashScreen(QWidget *parent, const QPixmap &pixmap, Qt::WindowFlags f)
    : QWidget(*new QSplashScreenPrivate, parent, Qt::SplashScreen | f)
{
    d_func()->pixmap = pixmap;
    setPixmap(d_func()->pixmap);  // Does an implicit repaint
}

QSplashScreen::~QSplashScreen()
{
}

void QSplashScreen::mousePressEvent(QMouseEvent *)
{
    hide();
}

void QSplashScreen::repaint()
{
    QWidget::repaint();
    QApplication::flush();
}

void QSplashScreen::showMessage(const QString &message, int alignment,
                                const QColor &color)
{
    Q_D(QSplashScreen);
    d->currStatus = message;
    d->currAlign = alignment;
    d->currColor = color;
    emit messageChanged(d->currStatus);
    repaint();
}

void QSplashScreen::clearMessage()
{
    d_func()->currStatus.clear();
    emit messageChanged(d_func()->currStatus);
    repaint();
}

void QSplashScreen::finish(QWidget *mainWin)
{
    if (mainWin) {
#if defined(Q_WS_X11)
        extern void qt_x11_wait_for_window_manager(QWidget *mainWin, bool);
        qt_x11_wait_for_window_manager(mainWin, false);
#endif
    }
    close();
}

void QSplashScreen::setPixmap(const QPixmap &pixmap)
{
    Q_D(QSplashScreen);

    d->pixmap = pixmap;
    setAttribute(Qt::WA_TranslucentBackground, pixmap.hasAlpha());

    QRect r(QPoint(), d->pixmap.size());
    resize(r.size());
    move(QApplication::desktop()->screenGeometry().center() - r.center());
    if (isVisible())
        repaint();
}

const QPixmap QSplashScreen::pixmap() const
{
    return d_func()->pixmap;
}

inline QSplashScreenPrivate::QSplashScreenPrivate() : currAlign(Qt::AlignLeft)
{
}

void QSplashScreen::drawContents(QPainter *painter)
{
    Q_D(QSplashScreen);
    painter->setPen(d->currColor);
    QRect r = rect().adjusted(5, 5, -5, -5);
    if (Qt::mightBeRichText(d->currStatus)) {
        QTextDocument doc;
#ifdef QT_NO_TEXTHTMLPARSER
        doc.setPlainText(d->currStatus);
#else
        doc.setHtml(d->currStatus);
#endif
        doc.setTextWidth(r.width());
        QTextCursor cursor(&doc);
        cursor.select(QTextCursor::Document);
        QTextBlockFormat fmt;
        fmt.setAlignment(Qt::Alignment(d->currAlign));
        cursor.mergeBlockFormat(fmt);
        painter->save();
        painter->translate(r.topLeft());
        doc.drawContents(painter);
        painter->restore();
    } else {
        painter->drawText(r, d->currAlign, d->currStatus);
    }
}

bool QSplashScreen::event(QEvent *e)
{
    if (e->type() == QEvent::Paint) {
        Q_D(QSplashScreen);
        QPainter painter(this);
        if (!d->pixmap.isNull())
            painter.drawPixmap(QPoint(), d->pixmap);
        drawContents(&painter);
    }
    return QWidget::event(e);
}

QT_END_NAMESPACE

#endif //QT_NO_SPLASHSCREEN