source: trunk/doc/src/snippets/brushstyles/renderarea.cpp

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#include <QtGui>

#include "renderarea.h"

RenderArea::RenderArea(QBrush *brush, QWidget *parent)
        : QWidget(parent)
{
    currentBrush = brush;
}

QSize RenderArea::minimumSizeHint() const
{
    return QSize(120, 60);
}

void RenderArea::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setPen(Qt::NoPen);
    painter.setRenderHint(QPainter::Antialiasing);


    if(currentBrush->style() == Qt::LinearGradientPattern) {
        currentBrush = new QBrush(QLinearGradient(0, 0, width(), 60));
    } else if(currentBrush->style() == Qt::RadialGradientPattern) {
        QRadialGradient radial(width() / 2, 30, width() / 2, width() / 2, 30);
        radial.setColorAt(0, Qt::white);
        radial.setColorAt(1, Qt::black);
        currentBrush = new QBrush(radial);
    } else if(currentBrush->style() == Qt::ConicalGradientPattern) {
        currentBrush = new QBrush(QConicalGradient(width() / 2, 30, 90));
    }
    painter.setBrush(*currentBrush);

    QPainterPath path;
    path.addRect(0, 0, parentWidget()->width(), 60);
    painter.drawPath(path);
}