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author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 10:18:55 +0100 |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 10:18:55 +0100 |
commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /examples/opengl/2dpainting/helper.cpp | |
download | qt4-tools-e5fcad302d86d316390c6b0f62759a067313e8a9.tar.gz |
Long live Qt 4.5!
Diffstat (limited to 'examples/opengl/2dpainting/helper.cpp')
-rw-r--r-- | examples/opengl/2dpainting/helper.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/examples/opengl/2dpainting/helper.cpp b/examples/opengl/2dpainting/helper.cpp new file mode 100644 index 0000000000..8796d87b8e --- /dev/null +++ b/examples/opengl/2dpainting/helper.cpp @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** 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 +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> +#include "helper.h" + +//! [0] +Helper::Helper() +{ + QLinearGradient gradient(QPointF(50, -20), QPointF(80, 20)); + gradient.setColorAt(0.0, Qt::white); + gradient.setColorAt(1.0, QColor(0xa6, 0xce, 0x39)); + + background = QBrush(QColor(64, 32, 64)); + circleBrush = QBrush(gradient); + circlePen = QPen(Qt::black); + circlePen.setWidth(1); + textPen = QPen(Qt::white); + textFont.setPixelSize(50); +} +//! [0] + +//! [1] +void Helper::paint(QPainter *painter, QPaintEvent *event, int elapsed) +{ + painter->fillRect(event->rect(), background); + painter->translate(100, 100); +//! [1] + +//! [2] + painter->save(); + painter->setBrush(circleBrush); + painter->setPen(circlePen); + painter->rotate(elapsed * 0.030); + + qreal r = elapsed/1000.0; + int n = 30; + for (int i = 0; i < n; ++i) { + painter->rotate(30); + qreal radius = 0 + 120.0*((i+r)/n); + qreal circleRadius = 1 + ((i+r)/n)*20; + painter->drawEllipse(QRectF(radius, -circleRadius, + circleRadius*2, circleRadius*2)); + } + painter->restore(); +//! [2] + +//! [3] + painter->setPen(textPen); + painter->setFont(textFont); + painter->drawText(QRect(-50, -50, 100, 100), Qt::AlignCenter, "Qt"); +} +//! [3] |