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<h1 class="title">padnavigator.cpp Example File</h1>
<span class="small-subtitle">graphicsview/padnavigator/padnavigator.cpp</span>
<!-- $$$graphicsview/padnavigator/padnavigator.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2013 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "flippablepad.h"</span>
<span class="preprocessor">#include "padnavigator.h"</span>
<span class="preprocessor">#include "splashitem.h"</span>
<span class="preprocessor">#include <QtGui/QtGui></span>
<span class="preprocessor">#ifndef QT_NO_OPENGL</span>
<span class="preprocessor">#include <QtOpenGL/QtOpenGL></span>
<span class="preprocessor">#endif</span>
PadNavigator<span class="operator">::</span>PadNavigator(<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> <span class="operator">&</span>size<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span>(parent)
{
<span class="comment">// Splash item</span>
SplashItem <span class="operator">*</span>splash <span class="operator">=</span> <span class="keyword">new</span> SplashItem;
splash<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">1</span>);
<span class="comment">// Pad item</span>
FlippablePad <span class="operator">*</span>pad <span class="operator">=</span> <span class="keyword">new</span> FlippablePad(size);
<span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span> <span class="operator">*</span>flipRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span>(pad);
<span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span> <span class="operator">*</span>xRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span>(pad);
<span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span> <span class="operator">*</span>yRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsrotation.html">QGraphicsRotation</a></span>(pad);
flipRotation<span class="operator">-</span><span class="operator">></span>setAxis(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>YAxis);
xRotation<span class="operator">-</span><span class="operator">></span>setAxis(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>YAxis);
yRotation<span class="operator">-</span><span class="operator">></span>setAxis(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>XAxis);
pad<span class="operator">-</span><span class="operator">></span>setTransformations(<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qgraphicstransform.html">QGraphicsTransform</a></span> <span class="operator">*</span><span class="operator">></span>()
<span class="operator"><</span><span class="operator"><</span> flipRotation
<span class="operator"><</span><span class="operator"><</span> xRotation <span class="operator"><</span><span class="operator"><</span> yRotation);
<span class="comment">// Back (proxy widget) item</span>
<span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span> <span class="operator">*</span>backItem <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsproxywidget.html">QGraphicsProxyWidget</a></span>(pad);
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>;
form<span class="operator">.</span>setupUi(widget);
form<span class="operator">.</span>hostName<span class="operator">-</span><span class="operator">></span>setFocus();
backItem<span class="operator">-</span><span class="operator">></span>setWidget(widget);
backItem<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>);
backItem<span class="operator">-</span><span class="operator">></span>setFocus();
backItem<span class="operator">-</span><span class="operator">></span>setCacheMode(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemCoordinateCache);
<span class="keyword">const</span> <span class="type"><a href="qrectf.html">QRectF</a></span> r <span class="operator">=</span> backItem<span class="operator">-</span><span class="operator">></span>rect();
backItem<span class="operator">-</span><span class="operator">></span>setTransform(<span class="type"><a href="qtransform.html">QTransform</a></span>()
<span class="operator">.</span>rotate(<span class="number">180</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>YAxis)
<span class="operator">.</span>translate(<span class="operator">-</span>r<span class="operator">.</span>width()<span class="operator">/</span><span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>r<span class="operator">.</span>height()<span class="operator">/</span><span class="number">2</span>));
<span class="comment">// Selection item</span>
RoundRectItem <span class="operator">*</span>selectionItem <span class="operator">=</span> <span class="keyword">new</span> RoundRectItem(<span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">60</span><span class="operator">,</span> <span class="operator">-</span><span class="number">60</span><span class="operator">,</span> <span class="number">120</span><span class="operator">,</span> <span class="number">120</span>)<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>gray<span class="operator">,</span> pad);
selectionItem<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">0.5</span>);
<span class="comment">// Splash animations</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothSplashMove <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(splash<span class="operator">,</span> <span class="string">"y"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothSplashOpacity <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(splash<span class="operator">,</span> <span class="string">"opacity"</span>);
smoothSplashMove<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InQuad);
smoothSplashMove<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">250</span>);
smoothSplashOpacity<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">250</span>);
<span class="comment">// Selection animation</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothXSelection <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(selectionItem<span class="operator">,</span> <span class="string">"x"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothYSelection <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(selectionItem<span class="operator">,</span> <span class="string">"y"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothXRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(xRotation<span class="operator">,</span> <span class="string">"angle"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothYRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(yRotation<span class="operator">,</span> <span class="string">"angle"</span>);
smoothXSelection<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">125</span>);
smoothYSelection<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">125</span>);
smoothXRotation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">125</span>);
smoothYRotation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">125</span>);
smoothXSelection<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothYSelection<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothXRotation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothYRotation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
<span class="comment">// Flip animation setup</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothFlipRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(flipRotation<span class="operator">,</span> <span class="string">"angle"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothFlipScale <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(pad<span class="operator">,</span> <span class="string">"scale"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothFlipXRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(xRotation<span class="operator">,</span> <span class="string">"angle"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>smoothFlipYRotation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(yRotation<span class="operator">,</span> <span class="string">"angle"</span>);
<span class="type"><a href="qparallelanimationgroup.html">QParallelAnimationGroup</a></span> <span class="operator">*</span>flipAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qparallelanimationgroup.html">QParallelAnimationGroup</a></span>(<span class="keyword">this</span>);
smoothFlipScale<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">500</span>);
smoothFlipRotation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">500</span>);
smoothFlipXRotation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">500</span>);
smoothFlipYRotation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">500</span>);
smoothFlipScale<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothFlipRotation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothFlipXRotation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothFlipYRotation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InOutQuad);
smoothFlipScale<span class="operator">-</span><span class="operator">></span>setKeyValueAt(<span class="number">0</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">1.0</span>));
smoothFlipScale<span class="operator">-</span><span class="operator">></span>setKeyValueAt(<span class="number">0.5</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">0.7</span>));
smoothFlipScale<span class="operator">-</span><span class="operator">></span>setKeyValueAt(<span class="number">1</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">1.0</span>));
flipAnimation<span class="operator">-</span><span class="operator">></span>addAnimation(smoothFlipRotation);
flipAnimation<span class="operator">-</span><span class="operator">></span>addAnimation(smoothFlipScale);
flipAnimation<span class="operator">-</span><span class="operator">></span>addAnimation(smoothFlipXRotation);
flipAnimation<span class="operator">-</span><span class="operator">></span>addAnimation(smoothFlipYRotation);
<span class="comment">// Flip animation delayed property assignment</span>
<span class="type"><a href="qsequentialanimationgroup.html">QSequentialAnimationGroup</a></span> <span class="operator">*</span>setVariablesSequence <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsequentialanimationgroup.html">QSequentialAnimationGroup</a></span>;
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>setFillAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(pad<span class="operator">,</span> <span class="string">"fill"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>setBackItemVisibleAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(backItem<span class="operator">,</span> <span class="string">"visible"</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>setSelectionItemVisibleAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(selectionItem<span class="operator">,</span> <span class="string">"visible"</span>);
setFillAnimation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">0</span>);
setBackItemVisibleAnimation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">0</span>);
setSelectionItemVisibleAnimation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">0</span>);
setVariablesSequence<span class="operator">-</span><span class="operator">></span>addPause(<span class="number">250</span>);
setVariablesSequence<span class="operator">-</span><span class="operator">></span>addAnimation(setBackItemVisibleAnimation);
setVariablesSequence<span class="operator">-</span><span class="operator">></span>addAnimation(setSelectionItemVisibleAnimation);
setVariablesSequence<span class="operator">-</span><span class="operator">></span>addAnimation(setFillAnimation);
flipAnimation<span class="operator">-</span><span class="operator">></span>addAnimation(setVariablesSequence);
<span class="comment">// Build the state machine</span>
<span class="type"><a href="qstatemachine.html">QStateMachine</a></span> <span class="operator">*</span>stateMachine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstatemachine.html">QStateMachine</a></span>(<span class="keyword">this</span>);
<span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>splashState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(stateMachine);
<span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>frontState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(stateMachine);
<span class="type"><a href="qhistorystate.html">QHistoryState</a></span> <span class="operator">*</span>historyState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhistorystate.html">QHistoryState</a></span>(frontState);
<span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>backState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(stateMachine);
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(pad<span class="operator">,</span> <span class="string">"fill"</span><span class="operator">,</span> <span class="keyword">false</span>);
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(splash<span class="operator">,</span> <span class="string">"opacity"</span><span class="operator">,</span> <span class="number">0.0</span>);
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(backItem<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">false</span>);
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(flipRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">0.0</span>));
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(selectionItem<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">true</span>);
backState<span class="operator">-</span><span class="operator">></span>assignProperty(pad<span class="operator">,</span> <span class="string">"fill"</span><span class="operator">,</span> <span class="keyword">true</span>);
backState<span class="operator">-</span><span class="operator">></span>assignProperty(backItem<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">true</span>);
backState<span class="operator">-</span><span class="operator">></span>assignProperty(xRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">0.0</span>));
backState<span class="operator">-</span><span class="operator">></span>assignProperty(yRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">0.0</span>));
backState<span class="operator">-</span><span class="operator">></span>assignProperty(flipRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span>(<span class="number">180.0</span>));
backState<span class="operator">-</span><span class="operator">></span>assignProperty(selectionItem<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">false</span>);
stateMachine<span class="operator">-</span><span class="operator">></span>addDefaultAnimation(smoothXRotation);
stateMachine<span class="operator">-</span><span class="operator">></span>addDefaultAnimation(smoothYRotation);
stateMachine<span class="operator">-</span><span class="operator">></span>addDefaultAnimation(smoothXSelection);
stateMachine<span class="operator">-</span><span class="operator">></span>addDefaultAnimation(smoothYSelection);
stateMachine<span class="operator">-</span><span class="operator">></span>setInitialState(splashState);
<span class="comment">// Transitions</span>
<span class="type"><a href="qeventtransition.html">QEventTransition</a></span> <span class="operator">*</span>anyKeyTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qeventtransition.html">QEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span> splashState);
anyKeyTransition<span class="operator">-</span><span class="operator">></span>setTargetState(frontState);
anyKeyTransition<span class="operator">-</span><span class="operator">></span>addAnimation(smoothSplashMove);
anyKeyTransition<span class="operator">-</span><span class="operator">></span>addAnimation(smoothSplashOpacity);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>enterTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Enter<span class="operator">,</span> backState);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>returnTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Return<span class="operator">,</span> backState);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>backEnterTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Enter<span class="operator">,</span> frontState);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>backReturnTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Return<span class="operator">,</span> frontState);
enterTransition<span class="operator">-</span><span class="operator">></span>setTargetState(historyState);
returnTransition<span class="operator">-</span><span class="operator">></span>setTargetState(historyState);
backEnterTransition<span class="operator">-</span><span class="operator">></span>setTargetState(backState);
backReturnTransition<span class="operator">-</span><span class="operator">></span>setTargetState(backState);
enterTransition<span class="operator">-</span><span class="operator">></span>addAnimation(flipAnimation);
returnTransition<span class="operator">-</span><span class="operator">></span>addAnimation(flipAnimation);
backEnterTransition<span class="operator">-</span><span class="operator">></span>addAnimation(flipAnimation);
backReturnTransition<span class="operator">-</span><span class="operator">></span>addAnimation(flipAnimation);
<span class="comment">// Create substates for each icon; store in temporary grid.</span>
<span class="type">int</span> columns <span class="operator">=</span> size<span class="operator">.</span>width();
<span class="type">int</span> rows <span class="operator">=</span> size<span class="operator">.</span>height();
<span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span> <span class="type"><a href="qvector.html">QVector</a></span><span class="operator"><</span> <span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span> <span class="operator">></span> <span class="operator">></span> stateGrid;
stateGrid<span class="operator">.</span>resize(rows);
<span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; y <span class="operator"><</span> rows; <span class="operator">+</span><span class="operator">+</span>y) {
stateGrid<span class="operator">[</span>y<span class="operator">]</span><span class="operator">.</span>resize(columns);
<span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; x <span class="operator"><</span> columns; <span class="operator">+</span><span class="operator">+</span>x)
stateGrid<span class="operator">[</span>y<span class="operator">]</span><span class="operator">[</span>x<span class="operator">]</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(frontState);
}
frontState<span class="operator">-</span><span class="operator">></span>setInitialState(stateGrid<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">[</span><span class="number">0</span><span class="operator">]</span>);
selectionItem<span class="operator">-</span><span class="operator">></span>setPos(pad<span class="operator">-</span><span class="operator">></span>iconAt(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>)<span class="operator">-</span><span class="operator">></span>pos());
<span class="comment">// Enable key navigation using state transitions</span>
<span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; y <span class="operator"><</span> rows; <span class="operator">+</span><span class="operator">+</span>y) {
<span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; x <span class="operator"><</span> columns; <span class="operator">+</span><span class="operator">+</span>x) {
<span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>state <span class="operator">=</span> stateGrid<span class="operator">[</span>y<span class="operator">]</span><span class="operator">[</span>x<span class="operator">]</span>;
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>rightTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Right<span class="operator">,</span> state);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>leftTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Left<span class="operator">,</span> state);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>downTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Down<span class="operator">,</span> state);
<span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span> <span class="operator">*</span>upTransition <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qkeyeventtransition.html">QKeyEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>KeyPress<span class="operator">,</span>
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Key_Up<span class="operator">,</span> state);
rightTransition<span class="operator">-</span><span class="operator">></span>setTargetState(stateGrid<span class="operator">[</span>y<span class="operator">]</span><span class="operator">[</span>(x <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> columns<span class="operator">]</span>);
leftTransition<span class="operator">-</span><span class="operator">></span>setTargetState(stateGrid<span class="operator">[</span>y<span class="operator">]</span><span class="operator">[</span>((x <span class="operator">-</span> <span class="number">1</span>) <span class="operator">+</span> columns) <span class="operator">%</span> columns<span class="operator">]</span>);
downTransition<span class="operator">-</span><span class="operator">></span>setTargetState(stateGrid<span class="operator">[</span>(y <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> rows<span class="operator">]</span><span class="operator">[</span>x<span class="operator">]</span>);
upTransition<span class="operator">-</span><span class="operator">></span>setTargetState(stateGrid<span class="operator">[</span>((y <span class="operator">-</span> <span class="number">1</span>) <span class="operator">+</span> rows) <span class="operator">%</span> rows<span class="operator">]</span><span class="operator">[</span>x<span class="operator">]</span>);
RoundRectItem <span class="operator">*</span>icon <span class="operator">=</span> pad<span class="operator">-</span><span class="operator">></span>iconAt(x<span class="operator">,</span> y);
state<span class="operator">-</span><span class="operator">></span>assignProperty(xRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> <span class="operator">-</span>icon<span class="operator">-</span><span class="operator">></span>x() <span class="operator">/</span> <span class="number">6.0</span>);
state<span class="operator">-</span><span class="operator">></span>assignProperty(yRotation<span class="operator">,</span> <span class="string">"angle"</span><span class="operator">,</span> icon<span class="operator">-</span><span class="operator">></span>y() <span class="operator">/</span> <span class="number">6.0</span>);
state<span class="operator">-</span><span class="operator">></span>assignProperty(selectionItem<span class="operator">,</span> <span class="string">"x"</span><span class="operator">,</span> icon<span class="operator">-</span><span class="operator">></span>x());
state<span class="operator">-</span><span class="operator">></span>assignProperty(selectionItem<span class="operator">,</span> <span class="string">"y"</span><span class="operator">,</span> icon<span class="operator">-</span><span class="operator">></span>y());
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(icon<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">true</span>);
backState<span class="operator">-</span><span class="operator">></span>assignProperty(icon<span class="operator">,</span> <span class="string">"visible"</span><span class="operator">,</span> <span class="keyword">false</span>);
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>setIconVisibleAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(icon<span class="operator">,</span> <span class="string">"visible"</span>);
setIconVisibleAnimation<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">0</span>);
setVariablesSequence<span class="operator">-</span><span class="operator">></span>addAnimation(setIconVisibleAnimation);
}
}
<span class="comment">// Scene</span>
<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span> <span class="operator">*</span>scene <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span>(<span class="keyword">this</span>);
scene<span class="operator">-</span><span class="operator">></span>setBackgroundBrush(<span class="type"><a href="qpixmap.html">QPixmap</a></span>(<span class="string">":/images/blue_angle_swirl.jpg"</span>));
scene<span class="operator">-</span><span class="operator">></span>setItemIndexMethod(<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span><span class="operator">::</span>NoIndex);
scene<span class="operator">-</span><span class="operator">></span>addItem(pad);
scene<span class="operator">-</span><span class="operator">></span>setSceneRect(scene<span class="operator">-</span><span class="operator">></span>itemsBoundingRect());
setScene(scene);
<span class="comment">// Adjust splash item to scene contents</span>
<span class="keyword">const</span> <span class="type"><a href="qrectf.html">QRectF</a></span> sbr <span class="operator">=</span> splash<span class="operator">-</span><span class="operator">></span>boundingRect();
splash<span class="operator">-</span><span class="operator">></span>setPos(<span class="operator">-</span>sbr<span class="operator">.</span>width() <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> scene<span class="operator">-</span><span class="operator">></span>sceneRect()<span class="operator">.</span>top() <span class="operator">-</span> <span class="number">2</span>);
frontState<span class="operator">-</span><span class="operator">></span>assignProperty(splash<span class="operator">,</span> <span class="string">"y"</span><span class="operator">,</span> splash<span class="operator">-</span><span class="operator">></span>y() <span class="operator">-</span> <span class="number">100.0</span>);
scene<span class="operator">-</span><span class="operator">></span>addItem(splash);
<span class="comment">// View</span>
setVerticalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
setHorizontalScrollBarPolicy(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ScrollBarAlwaysOff);
setMinimumSize(<span class="number">50</span><span class="operator">,</span> <span class="number">50</span>);
setViewportUpdateMode(FullViewportUpdate);
setCacheMode(CacheBackground);
setRenderHints(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing <span class="operator">|</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>SmoothPixmapTransform <span class="operator">|</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>TextAntialiasing);
<span class="preprocessor">#ifndef QT_NO_OPENGL</span>
setViewport(<span class="keyword">new</span> <span class="type"><a href="qglwidget.html">QGLWidget</a></span>(<span class="type"><a href="qglformat.html">QGLFormat</a></span>(QGL<span class="operator">::</span>SampleBuffers)));
<span class="preprocessor">#endif</span>
stateMachine<span class="operator">-</span><span class="operator">></span>start();
}
<span class="type">void</span> PadNavigator<span class="operator">::</span>resizeEvent(<span class="type"><a href="qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span>event)
{
<span class="type"><a href="qgraphicsview.html">QGraphicsView</a></span><span class="operator">::</span>resizeEvent(event);
fitInView(scene()<span class="operator">-</span><span class="operator">></span>sceneRect()<span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>KeepAspectRatio);
}</pre>
</div>
<!-- @@@graphicsview/padnavigator/padnavigator.cpp -->
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The documentation provided herein is licensed under the terms of the
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License version 1.3</a> as published by the Free Software Foundation.</p>
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
www.qt-project.org</a>.</p>
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