author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 04 May 2010 12:39:35 +0300 | |
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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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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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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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// 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->pos()), |
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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->setPos(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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* \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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112 |
} |
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113 |
|
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114 |
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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119 |
|
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120 |
// ---------------------- |
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121 |
|
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122 |
/** |
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* \brief Basic animations for ChromeSnippets |
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124 |
* |
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* The GraphicsItemAnimation class provides basic animations for ChromeSnippets. |
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126 |
* |
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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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129 |
* |
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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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134 |
*/ |
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class GraphicsItemAnimation : public QObject |
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136 |
{ |
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137 |
Q_OBJECT |
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138 |
public: |
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GraphicsItemAnimation(ChromeSnippet *snippet, int duration = 500) |
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: m_snippet(snippet), |
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141 |
m_timeLine(duration) |
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142 |
{ |
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setObjectName("animation"); |
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m_timeLine.setFrameRange(0, duration/50); |
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safe_connect(&m_timeLine, SIGNAL(valueChanged(qreal)), this, SLOT(update(qreal))); |
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safe_connect(&m_timeLine, SIGNAL(finished()), this, SIGNAL(finished())); |
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147 |
} |
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148 |
|
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~GraphicsItemAnimation(); |
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150 |
|
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151 |
public slots: |
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QObject *translateTo(int x, int y) |
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153 |
{ |
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QPointF pos = m_snippet->pos(); |
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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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158 |
|
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QObject *translateBy(int dx, int dy) |
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160 |
{ |
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m_animators.append(new GraphicsItemAnimatorTranslate(m_snippet, dx, dy)); |
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return this; |
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163 |
} |
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164 |
|
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QObject *fadeTo(qreal opacity) |
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166 |
{ |
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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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169 |
} |
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170 |
|
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QObject *fadeBy(qreal dOpacity) |
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172 |
{ |
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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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176 |
|
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QObject *rotateBy(qreal angle, qreal xCenter, qreal yCenter) |
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178 |
{ |
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m_animators.append(new GraphicsItemAnimatorRotate(m_snippet, angle, xCenter, yCenter)); |
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return this; |
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181 |
} |
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182 |
|
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QObject *start() |
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184 |
{ |
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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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189 |
|
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QObject *stop() |
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191 |
{ |
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m_timeLine.stop(); |
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return this; |
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194 |
} |
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195 |
|
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196 |
signals: |
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void finished(); |
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void updated(qreal value); |
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199 |
|
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protected slots: |
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void update(qreal value) |
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202 |
{ |
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foreach(GraphicsItemAnimator *animator, m_animators) |
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204 |
{ |
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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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209 |
|
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210 |
private: |
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ChromeSnippet *m_snippet; |
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QTimeLine m_timeLine; |
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QList<GraphicsItemAnimator *> m_animators; |
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}; |
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#endif // GRAPHICSITEMANIMATION_H |