author | hgs |
Tue, 29 Jun 2010 00:46:29 -0400 | |
changeset 3 | 0954f5dd2cd0 |
parent 0 | 1450b09d0cfd |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, version 2.1 of the License. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, |
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* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/". |
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* |
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* Description: |
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* |
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*/ |
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#ifndef GRAPHICSITEMANIMATION_H |
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#define GRAPHICSITEMANIMATION_H |
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#include <QObject> |
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#include <QTimeLine> |
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#include <assert.h> |
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#include "ChromeSnippet.h" |
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//#include "utilities.h" |
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namespace GVA { |
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// Base class for ChromeSnippet animations. |
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class GraphicsItemAnimator |
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{ |
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friend class GraphicsItemAnimation; |
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virtual void apply(ChromeSnippet *snippet, qreal value) = 0; |
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public: |
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virtual ~GraphicsItemAnimator() {} |
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}; |
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// ---------------------- |
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/** |
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* \brief Provides fade animations for ChromeSnippets. |
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* |
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* \sa GraphicsItemAnimation |
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*/ |
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class GraphicsItemAnimatorFade : public GraphicsItemAnimator |
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{ |
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public: |
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GraphicsItemAnimatorFade(ChromeSnippet *snippet, qreal opacityDelta) |
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: m_opacityOriginal(snippet->opacity()), |
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m_opacityDelta(opacityDelta) { |
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} |
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virtual void apply(ChromeSnippet *snippet, qreal value) { |
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snippet->setOpacity(m_opacityOriginal + value * m_opacityDelta); |
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} |
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private: |
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qreal m_opacityOriginal; |
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qreal m_opacityDelta; |
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}; |
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// ---------------------- |
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/** |
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* \brief Provides translation animations for ChromeSnippets. |
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* |
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* \sa GraphicsItemAnimation |
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*/ |
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class GraphicsItemAnimatorTranslate : public GraphicsItemAnimator |
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{ |
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public: |
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GraphicsItemAnimatorTranslate(ChromeSnippet *snippet, qreal dx, qreal dy) |
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: m_posOriginal(snippet->position()), |
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m_xDelta(dx), |
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m_yDelta(dy) { |
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} |
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virtual void apply(ChromeSnippet *snippet, qreal value) { |
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snippet->setPosition(m_posOriginal.x() + m_xDelta * value, m_posOriginal.y() + m_yDelta * value); |
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} |
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private: |
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QPointF m_posOriginal; |
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qreal m_xDelta; |
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qreal m_yDelta; |
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}; |
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// ---------------------- |
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/** |
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v * \brief Provides rotation animations for ChromeSnippets. |
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* |
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* \sa GraphicsItemAnimation |
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*/ |
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class GraphicsItemAnimatorRotate : public GraphicsItemAnimator |
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{ |
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public: |
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GraphicsItemAnimatorRotate(ChromeSnippet *snippet, qreal angleDelta, qreal xCenter, qreal yCenter) |
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: m_originalTransform(snippet->transform()), |
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m_angleDelta(angleDelta), |
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m_xCenter(xCenter), |
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m_yCenter(yCenter) |
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{ |
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} |
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virtual void apply(ChromeSnippet *snippet, qreal value) { |
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QTransform transform = m_originalTransform; |
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transform.translate(m_xCenter, m_yCenter); |
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transform.rotate(m_angleDelta * value); |
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transform.translate(-m_xCenter, -m_yCenter); |
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snippet->setTransform(transform); |
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} |
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private: |
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QTransform m_originalTransform; |
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qreal m_angleDelta; |
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qreal m_xCenter, m_yCenter; |
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}; |
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// ---------------------- |
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|
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/** |
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* \brief Basic animations for ChromeSnippets |
3 | 129 |
* |
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* The GraphicsItemAnimation class provides basic animations for ChromeSnippets. |
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* |
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* Calls to translateTo(), translateBy(), fadeTo() etc. can be chained together in javascript as follows: |
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* \code window.snippets.TopChromeId.animate(500).translateBy(10,30).fadeBy(-0.5).start()\endcode |
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* |
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* \sa ChromeSnippet::animate() |
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* \sa GraphicsItemAnimator |
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* \sa AttentionAnimator |
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* \sa VisibilityAnimator |
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*/ |
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class GraphicsItemAnimation : public QObject |
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{ |
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Q_OBJECT |
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public: |
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GraphicsItemAnimation(ChromeSnippet *snippet, int duration = 500) |
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: m_snippet(snippet), |
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m_timeLine(duration) |
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{ |
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setObjectName("animation"); |
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m_timeLine.setFrameRange(0, duration/50); |
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connect(&m_timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(update(qreal))); |
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connect(&m_timeLine, SIGNAL(finished()), this, SIGNAL(finished())); |
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} |
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|
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~GraphicsItemAnimation(); |
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|
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public slots: |
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QObject *translateTo(int x, int y) |
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{ |
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QPointF pos = m_snippet->position(); |
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m_animators.append(new GraphicsItemAnimatorTranslate(m_snippet, x - pos.x(), y - pos.y())); |
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return this; |
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} |
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|
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QObject *translateBy(int dx, int dy) |
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{ |
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m_animators.append(new GraphicsItemAnimatorTranslate(m_snippet, dx, dy)); |
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return this; |
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} |
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|
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QObject *fadeTo(qreal opacity) |
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{ |
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m_animators.append(new GraphicsItemAnimatorFade(m_snippet, opacity - m_snippet->opacity())); |
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return this; |
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} |
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|
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QObject *fadeBy(qreal dOpacity) |
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{ |
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m_animators.append(new GraphicsItemAnimatorFade(m_snippet, dOpacity)); |
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return this; |
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} |
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|
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QObject *rotateBy(qreal angle, qreal xCenter, qreal yCenter) |
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{ |
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m_animators.append(new GraphicsItemAnimatorRotate(m_snippet, angle, xCenter, yCenter)); |
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return this; |
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} |
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|
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QObject *start() |
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{ |
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m_timeLine.stop(); |
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m_timeLine.start(); |
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return this; |
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} |
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|
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QObject *stop() |
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{ |
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m_timeLine.stop(); |
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return this; |
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} |
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|
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signals: |
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void finished(); |
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void updated(qreal value); |
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|
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protected slots: |
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void update(qreal value) |
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{ |
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foreach(GraphicsItemAnimator *animator, m_animators) |
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{ |
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animator->apply(m_snippet, value); |
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} |
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emit updated(value); |
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} |
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|
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private: |
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ChromeSnippet *m_snippet; // not owned |
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QTimeLine m_timeLine; |
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QList<GraphicsItemAnimator *> m_animators; |
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}; |
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|
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} |
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|
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#endif // GRAPHICSITEMANIMATION_H |