source: trunk/demos/shared/arthurwidgets.cpp@ 551

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#include "arthurwidgets.h"
#include <QApplication>
#include <QPainter>
#include <QPainterPath>
#include <QPixmapCache>
#include <QtEvents>
#include <QTextDocument>
#include <QAbstractTextDocumentLayout>
#include <QFile>
#include <QTextBrowser>
#include <QBoxLayout>

#ifdef Q_WS_X11
#include <private/qpixmapdata_p.h>
#endif

extern QPixmap cached(const QString &img);

ArthurFrame::ArthurFrame(QWidget *parent)
    : QWidget(parent)
    , m_prefer_image(false)
{
#ifdef QT_OPENGL_SUPPORT
    glw = 0;
    m_use_opengl = false;
    QGLFormat f = QGLFormat::defaultFormat();
    f.setSampleBuffers(true);
    f.setStencil(true);
    f.setAlpha(true);
    f.setAlphaBufferSize(8);
    QGLFormat::setDefaultFormat(f);
#endif
    m_document = 0;
    m_show_doc = false;

    m_tile = QPixmap(128, 128);
    m_tile.fill(Qt::white);
    QPainter pt(&m_tile);
    QColor color(230, 230, 230);
    pt.fillRect(0, 0, 64, 64, color);
    pt.fillRect(64, 64, 64, 64, color);
    pt.end();

//     QPalette pal = palette();
//     pal.setBrush(backgroundRole(), m_tile);
//     setPalette(pal);

#ifdef Q_WS_X11
    QPixmap xRenderPixmap(1, 1);
    m_prefer_image = xRenderPixmap.pixmapData()->classId() == QPixmapData::X11Class && !xRenderPixmap.x11PictureHandle();
#endif
}


#ifdef QT_OPENGL_SUPPORT
void ArthurFrame::enableOpenGL(bool use_opengl)
{
    m_use_opengl = use_opengl;

    if (!glw) {
        glw = new GLWidget(this);
        glw->setAutoFillBackground(false);
        glw->disableAutoBufferSwap();
        QApplication::postEvent(this, new QResizeEvent(size(), size()));
    }

    if (use_opengl) {
        glw->show();
    } else {
        glw->hide();
    }

    update();
}
#endif

void ArthurFrame::paintEvent(QPaintEvent *e)
{
#ifdef Q_WS_QWS
    static QPixmap *static_image = 0;
#else
    static QImage *static_image = 0;
#endif
    QPainter painter;
    if (preferImage()
#ifdef QT_OPENGL_SUPPORT
        && !m_use_opengl
#endif
        ) {