text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
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  ** This file is part of the documentation of the Qt Toolkit.
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  **
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  ****************************************************************************/
  
  #include <QtGui>
  #include "paintwidget.h"
  
  PaintWidget::PaintWidget(QWidget *parent)
      : QWidget(parent)
  {
  }
  
  void PaintWidget::paintEvent(QPaintEvent *event)
  {
      QLinearGradient gradient1(rect().topLeft(), rect().bottomRight());
      gradient1.setColorAt(0, QColor("#ffffcc"));
      gradient1.setColorAt(1, QColor("#ccccff"));
  
      QRectF ellipseRect(width()*0.25, height()*0.25, width()*0.5, height()*0.5);
      QLinearGradient gradient2(ellipseRect.topLeft(), ellipseRect.bottomRight());
      gradient2.setColorAt(0, QColor("#ccccff"));
      gradient2.setColorAt(1, QColor("#ffffcc"));
  
      QPainter painter;
      painter.begin(this);
      painter.setRenderHint(QPainter::Antialiasing);
      painter.fillRect(rect(), QBrush(gradient1));
      painter.setBrush(QBrush(gradient2));
      painter.drawEllipse(ellipseRect);
      painter.end();
  }
  