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-rw-r--r--doc/src/snippets/alphachannel.cpp108
1 files changed, 0 insertions, 108 deletions
diff --git a/doc/src/snippets/alphachannel.cpp b/doc/src/snippets/alphachannel.cpp
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--- a/doc/src/snippets/alphachannel.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-** the names of its contributors may be used to endorse or promote
-** products derived from this software without specific prior written
-** permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <qapplication.h>
-#include <qlabel.h>
-#include <qpixmap.h>
-#include <qprinter.h>
-#include <qpainter.h>
-#include <qfile.h>
-#include <qdir.h>
-#include <qfileinfo.h>
-#include <QtGui>
-#include <QtCore>
-
-class MyClass : public QWidget
-{
-public:
- MyClass(QWidget *parent = 0) : QWidget(parent) { }
-
-protected:
- void paintEvent(QPaintEvent *e)
- {
- /*QRadialGradient rg(50, 50, 50, 50, 50);
- rg.setColorAt(0, QColor::fromRgbF(1, 0, 0, 1));
- rg.setColorAt(1, QColor::fromRgbF(0, 0, 0, 0));
- QPainter pmp(&pm);
- pmp.fillRect(0, 0, 100, 100, rg);
- pmp.end();*/
-
- createImage();
-
- QPainter p(this);
- p.fillRect(rect(), Qt::white);
-
- p.drawPixmap(0, 0, pixmap);
-
- p.drawPixmap(100, 0, channelImage);
- }
-
- void createImage()
- {
-//! [0]
- pixmap = QPixmap(100, 100);
- pixmap.fill(Qt::transparent);
-
- QRadialGradient gradient(50, 50, 50, 50, 50);
- gradient.setColorAt(0, QColor::fromRgbF(1, 0, 0, 1));
- gradient.setColorAt(1, QColor::fromRgbF(0, 0, 0, 0));
- QPainter painter(&pixmap);
- painter.fillRect(0, 0, 100, 100, gradient);
-
- channelImage = pixmap.alphaChannel();
- update();
-//! [0]
- }
-
- QPixmap channelImage, pixmap;
- QSize sizeHint() const { return QSize(500, 500); }
-};
-
-int main(int argc, char **argv)
-{
- QApplication app(argc, argv);
-
- MyClass cl;
- cl.show();
- QObject::connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit()));
-
- int ret = app.exec();
- return ret;
-}