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Diffstat (limited to 'examples/qpa/qrasterwindow/main.cpp')
-rw-r--r-- | examples/qpa/qrasterwindow/main.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/examples/qpa/qrasterwindow/main.cpp b/examples/qpa/qrasterwindow/main.cpp new file mode 100644 index 0000000000..0e87d41682 --- /dev/null +++ b/examples/qpa/qrasterwindow/main.cpp @@ -0,0 +1,127 @@ +/**************************************************************************** + ** + ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). + ** Contact: http://www.qt-project.org/legal + ** + ** This file is part of the examples 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 Digia Plc 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 <QRasterWindow> +#include <QPainter> +#include <QGuiApplication> +#include <QMatrix4x4> +#include <QTimer> + +static QPainterPath painterPathForTriangle() +{ + static const QPointF bottomLeft(-1.0, -1.0); + static const QPointF top(0.0, 1.0); + static const QPointF bottomRight(1.0, -1.0); + + QPainterPath path(bottomLeft); + path.lineTo(top); + path.lineTo(bottomRight); + path.closeSubpath(); + return path; +} + +class PaintedWindow : public QRasterWindow +{ + Q_OBJECT + +public: + PaintedWindow() + { + m_view.lookAt(QVector3D(3,1,1), + QVector3D(0,0,0), + QVector3D(0,1,0)); + m_timer.setInterval(16); + connect(&m_timer, SIGNAL(timeout()), this, SLOT(update())); + m_timer.start(); + } + +protected: + void paintEvent(QPaintEvent *) + { + QPainter p(this); + p.fillRect(QRect(0,0,width(),height()),Qt::gray); + + p.setWorldTransform(m_window_matrix.toTransform()); + + QMatrix4x4 mvp = m_projection * m_view * m_model; + p.setTransform(mvp.toTransform(), true); + + p.fillPath(painterPathForTriangle(), m_brush); + + m_model.rotate(1, 0, 1, 0); + } + + void resizeEvent(QResizeEvent *) + { + m_window_matrix = QTransform(); + m_window_matrix.translate(width() / 2.0, height() / 2.0); + m_window_matrix.scale(width() / 2.0, -height() / 2.0); + + m_projection.setToIdentity(); + m_projection.perspective(45.f, qreal(width()) / qreal(height()), 0.1f, 100.f); + + QLinearGradient gradient(QPointF(-1,-1), QPointF(1,1)); + gradient.setColorAt(0, Qt::red); + gradient.setColorAt(1, Qt::green); + + m_brush = QBrush(gradient); + } + +private: + QMatrix4x4 m_window_matrix; + QMatrix4x4 m_projection; + QMatrix4x4 m_view; + QMatrix4x4 m_model; + QBrush m_brush; + QTimer m_timer; +}; + +int main (int argc, char **argv) +{ + QGuiApplication app(argc, argv); + + PaintedWindow window; + window.create(); + window.show(); + + return app.exec(); +} + +#include "main.moc" |