diff options
author | Aaron Kennedy <aaron.kennedy@nokia.com> | 2011-11-21 17:51:31 +0000 |
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committer | Qt by Nokia <qt-info@nokia.com> | 2011-11-21 19:01:16 +0100 |
commit | fbbc3cab4ac57b99387c7955e712cfea7cd72856 (patch) | |
tree | 25089694b0ca98571eca11c94ce5608012e428bc /tools/qmleasing/main.cpp | |
parent | af0af6fa1ad428931c729738a14bdf6fbb910887 (diff) |
Adding custom easing curves to property animations
QDeclarativeEasingValueType gets the property customBezierCurve.
This allows to define a custom easing curve as a cubic bezier curve.
Change-Id: I33ae128ce29bba2834eedcbb90a9769a5391f997
Reviewed-by: Aaron Kennedy <aaron.kennedy@nokia.com>
Diffstat (limited to 'tools/qmleasing/main.cpp')
-rw-r--r-- | tools/qmleasing/main.cpp | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/tools/qmleasing/main.cpp b/tools/qmleasing/main.cpp new file mode 100644 index 0000000000..a9f1da41d4 --- /dev/null +++ b/tools/qmleasing/main.cpp @@ -0,0 +1,116 @@ +/**************************************************************************** +** +** 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 tools applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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 1.1, 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QPainter> +#include <QQuickView> +#include <QApplication> +#include <QEasingCurve> +#include <QQuickPaintedItem> + +class EasingPlot : public QQuickPaintedItem +{ + Q_OBJECT + Q_PROPERTY(QEasingCurve easing READ easing WRITE setEasing NOTIFY easingChanged); + +public: + EasingPlot(); + + QEasingCurve easing() const; + void setEasing(const QEasingCurve &); + +signals: + void easingChanged(); + +protected: + virtual void paint(QPainter *painter); + +private: + QEasingCurve m_easing; +}; + +EasingPlot::EasingPlot() +{ +} + +QEasingCurve EasingPlot::easing() const +{ + return m_easing; +} + +void EasingPlot::setEasing(const QEasingCurve &e) +{ + if (m_easing == e) + return; + + m_easing = e; + emit easingChanged(); + + update(); +} + +void EasingPlot::paint(QPainter *painter) +{ + QPointF lastPoint(0, 0); + + for (int ii = 1; ii <= 100; ++ii) { + qreal value = m_easing.valueForProgress(qreal(ii) / 100.); + + QPointF currentPoint(width() * qreal(ii) / 100., value * (height() - 1)); + painter->drawLine(lastPoint, currentPoint); + + lastPoint = currentPoint; + } +} + +int main(int argc, char ** argv) +{ + QApplication app(argc, argv); + + qmlRegisterType<EasingPlot>("EasingPlot", 1, 0, "EasingPlot"); + + QQuickView view; + view.setSource(QUrl("qrc:/easing.qml")); + view.show(); + + return app.exec(); +} + +#include "main.moc" |