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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "qanimationstate.h" |
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43 |
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44 #include <QtCore/qstate.h> |
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45 |
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46 QT_BEGIN_NAMESPACE |
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47 |
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48 /*! |
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49 \class QAnimationState |
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50 |
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51 \brief The QAnimationState class provides state that handle an animation and emit |
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52 a signal when this animation is finished. |
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53 |
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54 \ingroup statemachine |
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55 |
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56 QAnimationState provides a state that handle an animation. It will start this animation |
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57 when the state is entered and stop it when it is leaved. When the animation has finished the |
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58 state emit animationFinished signal. |
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59 QAnimationState is part of \l{The State Machine Framework}. |
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60 |
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61 \code |
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62 QStateMachine machine; |
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63 QAnimationState *s = new QAnimationState(machine->rootState()); |
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64 QPropertyAnimation *animation = new QPropertyAnimation(obj, "pos"); |
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65 s->setAnimation(animation); |
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66 QState *s2 = new QState(machine->rootState()); |
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67 s->addTransition(s, SIGNAL(animationFinished()), s2); |
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68 machine.start(); |
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69 \endcode |
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70 |
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71 \sa QState, {The Animation Framework} |
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72 */ |
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73 |
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74 |
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75 #ifndef QT_NO_ANIMATION |
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76 |
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77 /*! |
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78 Constructs a new state with the given \a parent state. |
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79 */ |
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80 QAnimationState::QAnimationState(QState *parent) |
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81 : QState(parent), m_animation(0) |
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82 { |
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83 } |
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84 |
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85 /*! |
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86 Destroys the animation state. |
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87 */ |
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88 QAnimationState::~QAnimationState() |
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89 { |
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90 } |
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91 |
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92 /*! |
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93 Set an \a animation for this QAnimationState. If an animation was previously handle by this |
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94 state then it won't emit animationFinished for the old animation. The QAnimationState doesn't |
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95 take the ownership of the animation. |
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96 */ |
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97 void QAnimationState::setAnimation(QAbstractAnimation *animation) |
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98 { |
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99 if (animation == m_animation) |
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100 return; |
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101 |
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102 //Disconnect from the previous animation if exist |
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103 if(m_animation) |
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104 disconnect(m_animation, SIGNAL(finished()), this, SIGNAL(animationFinished())); |
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105 |
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106 m_animation = animation; |
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107 |
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108 if (m_animation) { |
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109 //connect the new animation |
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110 connect(m_animation, SIGNAL(finished()), this, SIGNAL(animationFinished())); |
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111 } |
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112 } |
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113 |
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114 /*! |
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115 Returns the animation handle by this animation state, or 0 if there is no animation. |
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116 */ |
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117 QAbstractAnimation* QAnimationState::animation() const |
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118 { |
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119 return m_animation; |
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120 } |
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121 |
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122 /*! |
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123 \reimp |
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124 */ |
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125 void QAnimationState::onEntry(QEvent *) |
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126 { |
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127 if (m_animation) |
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128 m_animation->start(); |
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129 } |
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130 |
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131 /*! |
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132 \reimp |
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133 */ |
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134 void QAnimationState::onExit(QEvent *) |
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135 { |
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136 if (m_animation) |
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137 m_animation->stop(); |
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138 } |
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139 |
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140 /*! |
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141 \reimp |
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142 */ |
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143 bool QAnimationState::event(QEvent *e) |
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144 { |
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145 return QState::event(e); |
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146 } |
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147 |
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148 QT_END_NAMESPACE |
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149 |
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150 #endif |