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**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
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** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

//! [0]
QLinearGradient gradient(0, 0, 100, 100);
gradient.setColorAt(0, Qt::red);
gradient.setColorAt(0.5, Qt::green);
gradient.setColorAt(1, Qt::blue);
painter.setBrush(gradient);
painter.drawRect(0, 0, 100, 100);
//! [0]


//! [1]
QRadialGradient gradient(50, 50, 50, 30, 30);
gradient.setColorAt(0.2, Qt::white);
gradient.setColorAt(0.8, Qt::green);
gradient.setColorAt(1, Qt::black);
painter.setBrush(gradient);
painter.drawEllipse(0, 0, 100, 100);
//! [1]


//! [2]
QConicalGradient gradient(60, 40, 0);
gradient.setColorAt(0, Qt::black);
gradient.setColorAt(0.4, Qt::green);
gradient.setColorAt(0.6, Qt::white);
gradient.setColorAt(1, Qt::black);
painter.setBrush(gradient);
painter.drawEllipse(0, 0, 100, 100);
//! [2]


//! [3]
// Specfiy semi-transparent red
painter.setBrush(QColor(255, 0, 0, 127));
painter.drawRect(0, 0, width()/2, height());

// Specify semi-transparend blue
painter.setBrush(QColor(0, 0, 255, 127));
painter.drawRect(0, 0, width(), height()/2);
//! [3]


//! [4]
// One line without anti-aliasing
painter.drawLine(0, 0, width()/2, height());

// One line with anti-aliasing
painter.setRenderHint(QPainter::Antialiasing);
painter.drawLine(width()/2, 0, width()/2, height());
//! [4]


//! [5]
QPainterPath path;
path.addRect(20, 20, 60, 60);
path.addBezier(0, 0,  99, 0,  50, 50,  99, 99);
path.addBezier(99, 99,  0, 99,  50, 50,  0, 0);
painter.drawPath(path);
//! [5]


//! [6]
QPixmap buffer(size());
QPainter painter(&buffer);

// Paint code here

painter.end();
bitBlt(this, 0, 0, &buffer);
//! [6]


//! [7]
QPainter painter(this);

// Paint code here

painter.end();
//! [7]


//! [8]
unbufferedWidget->setAttribute(Qt::WA_PaintOnScreen);
//! [8]


//! [9]
QLinearGradient gradient(0, 0, 100, 100);
gradient.setColorAt(0, Qt::blue);
gradient.setColorAt(1, Qt::red);
painter.setPen(QPen(gradient, 0));
for (int y=fontSize; y<100; y+=fontSize)
    drawText(0, y, text);
//! [9]


//! [10]
QImage image(100, 100, 32);
QPainter painter(&image);

// painter commands.

painter.end();
//! [10]