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<h1 class="title">boat.cpp Example File</h1>
<span class="small-subtitle">demos/sub-attaq/boat.cpp</span>
<!-- $$$demos/sub-attaq/boat.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 QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="comment">//Own</span>
<span class="preprocessor">#include "boat.h"</span>
<span class="preprocessor">#include "boat_p.h"</span>
<span class="preprocessor">#include "bomb.h"</span>
<span class="preprocessor">#include "pixmapitem.h"</span>
<span class="preprocessor">#include "graphicsscene.h"</span>
<span class="preprocessor">#include "animationmanager.h"</span>
<span class="preprocessor">#include "qanimationstate.h"</span>
<span class="comment">//Qt</span>
<span class="preprocessor">#include <QtCore/QPropertyAnimation></span>
<span class="preprocessor">#include <QtCore/QStateMachine></span>
<span class="preprocessor">#include <QtCore/QHistoryState></span>
<span class="preprocessor">#include <QtCore/QFinalState></span>
<span class="preprocessor">#include <QtCore/QState></span>
<span class="preprocessor">#include <QtCore/QSequentialAnimationGroup></span>
<span class="keyword">static</span> <span class="type"><a href="qabstractanimation.html">QAbstractAnimation</a></span> <span class="operator">*</span>setupDestroyAnimation(Boat <span class="operator">*</span>boat)
{
<span class="type"><a href="qsequentialanimationgroup.html">QSequentialAnimationGroup</a></span> <span class="operator">*</span>group <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsequentialanimationgroup.html">QSequentialAnimationGroup</a></span>(boat);
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator"><</span><span class="operator">=</span> <span class="number">4</span>; i<span class="operator">+</span><span class="operator">+</span>) {
PixmapItem <span class="operator">*</span>step <span class="operator">=</span> <span class="keyword">new</span> PixmapItem(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"explosion/boat/step%1"</span>)<span class="operator">.</span>arg(i)<span class="operator">,</span>GraphicsScene<span class="operator">::</span>Big<span class="operator">,</span> boat);
step<span class="operator">-</span><span class="operator">></span>setZValue(<span class="number">6</span>);
step<span class="operator">-</span><span class="operator">></span>setOpacity(<span class="number">0</span>);
<span class="comment">//fade-in</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>anim <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(step<span class="operator">,</span> <span class="string">"opacity"</span>);
anim<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="number">1</span>);
anim<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">100</span>);
group<span class="operator">-</span><span class="operator">></span>insertAnimation(i<span class="operator">-</span><span class="number">1</span><span class="operator">,</span> anim);
<span class="comment">//and then fade-out</span>
<span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>anim2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(step<span class="operator">,</span> <span class="string">"opacity"</span>);
anim2<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="number">0</span>);
anim2<span class="operator">-</span><span class="operator">></span>setDuration(<span class="number">100</span>);
group<span class="operator">-</span><span class="operator">></span>addAnimation(anim2);
}
AnimationManager<span class="operator">::</span>self()<span class="operator">-</span><span class="operator">></span>registerAnimation(group);
<span class="keyword">return</span> group;
}
Boat<span class="operator">::</span>Boat() : PixmapItem(<span class="type"><a href="qstring.html">QString</a></span>(<span class="string">"boat"</span>)<span class="operator">,</span> GraphicsScene<span class="operator">::</span>Big)<span class="operator">,</span>
speed(<span class="number">0</span>)<span class="operator">,</span> bombsAlreadyLaunched(<span class="number">0</span>)<span class="operator">,</span> direction(Boat<span class="operator">::</span>None)<span class="operator">,</span> movementAnimation(<span class="number">0</span>)
{
setZValue(<span class="number">4</span>);
setFlags(<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">::</span>ItemIsFocusable);
<span class="comment">//The movement animation used to animate the boat</span>
movementAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpropertyanimation.html">QPropertyAnimation</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"pos"</span>);
<span class="comment">//The destroy animation used to explode the boat</span>
destroyAnimation <span class="operator">=</span> setupDestroyAnimation(<span class="keyword">this</span>);
<span class="comment">//We setup the state machine of the boat</span>
machine <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>moving <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(machine);
StopState <span class="operator">*</span>stopState <span class="operator">=</span> <span class="keyword">new</span> StopState(<span class="keyword">this</span><span class="operator">,</span> moving);
machine<span class="operator">-</span><span class="operator">></span>setInitialState(moving);
moving<span class="operator">-</span><span class="operator">></span>setInitialState(stopState);
MoveStateRight <span class="operator">*</span>moveStateRight <span class="operator">=</span> <span class="keyword">new</span> MoveStateRight(<span class="keyword">this</span><span class="operator">,</span> moving);
MoveStateLeft <span class="operator">*</span>moveStateLeft <span class="operator">=</span> <span class="keyword">new</span> MoveStateLeft(<span class="keyword">this</span><span class="operator">,</span> moving);
LaunchStateRight <span class="operator">*</span>launchStateRight <span class="operator">=</span> <span class="keyword">new</span> LaunchStateRight(<span class="keyword">this</span><span class="operator">,</span> machine);
LaunchStateLeft <span class="operator">*</span>launchStateLeft <span class="operator">=</span> <span class="keyword">new</span> LaunchStateLeft(<span class="keyword">this</span><span class="operator">,</span> machine);
<span class="comment">//then setup the transitions for the rightMove state</span>
KeyStopTransition <span class="operator">*</span>leftStopRight <span class="operator">=</span> <span class="keyword">new</span> KeyStopTransition(<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);
leftStopRight<span class="operator">-</span><span class="operator">></span>setTargetState(stopState);
KeyMoveTransition <span class="operator">*</span>leftMoveRight <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
leftMoveRight<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateRight);
KeyMoveTransition <span class="operator">*</span>rightMoveRight <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
rightMoveRight<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateRight);
KeyMoveTransition <span class="operator">*</span>rightMoveStop <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
rightMoveStop<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateRight);
<span class="comment">//then setup the transitions for the leftMove state</span>
KeyStopTransition <span class="operator">*</span>rightStopLeft <span class="operator">=</span> <span class="keyword">new</span> KeyStopTransition(<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);
rightStopLeft<span class="operator">-</span><span class="operator">></span>setTargetState(stopState);
KeyMoveTransition <span class="operator">*</span>rightMoveLeft <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
rightMoveLeft<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateLeft);
KeyMoveTransition <span class="operator">*</span>leftMoveLeft <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
leftMoveLeft<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateLeft);
KeyMoveTransition <span class="operator">*</span>leftMoveStop <span class="operator">=</span> <span class="keyword">new</span> KeyMoveTransition(<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);
leftMoveStop<span class="operator">-</span><span class="operator">></span>setTargetState(moveStateLeft);
<span class="comment">//We set up the right move state</span>
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(leftStopRight);
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(leftMoveRight);
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(rightMoveRight);
stopState<span class="operator">-</span><span class="operator">></span>addTransition(rightMoveStop);
<span class="comment">//We set up the left move state</span>
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(rightStopLeft);
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(leftMoveLeft);
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(rightMoveLeft);
stopState<span class="operator">-</span><span class="operator">></span>addTransition(leftMoveStop);
<span class="comment">//The animation is finished, it means we reached the border of the screen, the boat is stopped so we move to the stop state</span>
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(movementAnimation<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> stopState);
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(movementAnimation<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> stopState);
<span class="comment">//We set up the keys for dropping bombs</span>
KeyLaunchTransition <span class="operator">*</span>upFireLeft <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
upFireLeft<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateRight);
KeyLaunchTransition <span class="operator">*</span>upFireRight <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
upFireRight<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateRight);
KeyLaunchTransition <span class="operator">*</span>upFireStop <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
upFireStop<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateRight);
KeyLaunchTransition <span class="operator">*</span>downFireLeft <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
downFireLeft<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateLeft);
KeyLaunchTransition <span class="operator">*</span>downFireRight <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
downFireRight<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateLeft);
KeyLaunchTransition <span class="operator">*</span>downFireMove <span class="operator">=</span> <span class="keyword">new</span> KeyLaunchTransition(<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);
downFireMove<span class="operator">-</span><span class="operator">></span>setTargetState(launchStateLeft);
<span class="comment">//We set up transitions for fire up</span>
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(upFireRight);
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(upFireLeft);
stopState<span class="operator">-</span><span class="operator">></span>addTransition(upFireStop);
<span class="comment">//We set up transitions for fire down</span>
moveStateRight<span class="operator">-</span><span class="operator">></span>addTransition(downFireRight);
moveStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(downFireLeft);
stopState<span class="operator">-</span><span class="operator">></span>addTransition(downFireMove);
<span class="comment">//Finally the launch state should come back to its original state</span>
<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>(moving);
launchStateLeft<span class="operator">-</span><span class="operator">></span>addTransition(historyState);
launchStateRight<span class="operator">-</span><span class="operator">></span>addTransition(historyState);
<span class="type"><a href="qfinalstate.html">QFinalState</a></span> <span class="operator">*</span>final <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qfinalstate.html">QFinalState</a></span>(machine);
<span class="comment">//This state play the destroyed animation</span>
<span class="type">QAnimationState</span> <span class="operator">*</span>destroyedState <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QAnimationState</span>(machine);
destroyedState<span class="operator">-</span><span class="operator">></span>setAnimation(destroyAnimation);
<span class="comment">//Play a nice animation when the boat is destroyed</span>
moving<span class="operator">-</span><span class="operator">></span>addTransition(<span class="keyword">this</span><span class="operator">,</span> SIGNAL(boatDestroyed())<span class="operator">,</span> destroyedState);
<span class="comment">//Transition to final state when the destroyed animation is finished</span>
destroyedState<span class="operator">-</span><span class="operator">></span>addTransition(destroyedState<span class="operator">,</span> SIGNAL(animationFinished())<span class="operator">,</span> final);
<span class="comment">//The machine has finished to be executed, then the boat is dead</span>
connect(machine<span class="operator">,</span>SIGNAL(finished())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SIGNAL(boatExecutionFinished()));
}
<span class="type">void</span> Boat<span class="operator">::</span>run()
{
<span class="comment">//We register animations</span>
AnimationManager<span class="operator">::</span>self()<span class="operator">-</span><span class="operator">></span>registerAnimation(movementAnimation);
AnimationManager<span class="operator">::</span>self()<span class="operator">-</span><span class="operator">></span>registerAnimation(destroyAnimation);
machine<span class="operator">-</span><span class="operator">></span>start();
}
<span class="type">void</span> Boat<span class="operator">::</span>stop()
{
movementAnimation<span class="operator">-</span><span class="operator">></span>stop();
machine<span class="operator">-</span><span class="operator">></span>stop();
}
<span class="type">void</span> Boat<span class="operator">::</span>updateBoatMovement()
{
<span class="keyword">if</span> (speed <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> direction <span class="operator">=</span><span class="operator">=</span> Boat<span class="operator">::</span>None) {
movementAnimation<span class="operator">-</span><span class="operator">></span>stop();
<span class="keyword">return</span>;
}
movementAnimation<span class="operator">-</span><span class="operator">></span>stop();
<span class="keyword">if</span> (direction <span class="operator">=</span><span class="operator">=</span> Boat<span class="operator">::</span>Left) {
movementAnimation<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span>y()));
movementAnimation<span class="operator">-</span><span class="operator">></span>setDuration(x()<span class="operator">/</span>speed<span class="operator">*</span><span class="number">15</span>);
}
<span class="keyword">else</span> <span class="comment">/*if (direction == Boat::Right)*/</span> {
movementAnimation<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="type"><a href="qpointf.html">QPointF</a></span>(scene()<span class="operator">-</span><span class="operator">></span>width()<span class="operator">-</span>size()<span class="operator">.</span>width()<span class="operator">,</span>y()));
movementAnimation<span class="operator">-</span><span class="operator">></span>setDuration((scene()<span class="operator">-</span><span class="operator">></span>width()<span class="operator">-</span>size()<span class="operator">.</span>width()<span class="operator">-</span>x())<span class="operator">/</span>speed<span class="operator">*</span><span class="number">15</span>);
}
movementAnimation<span class="operator">-</span><span class="operator">></span>start();
}
<span class="type">void</span> Boat<span class="operator">::</span>destroy()
{
movementAnimation<span class="operator">-</span><span class="operator">></span>stop();
<span class="keyword">emit</span> boatDestroyed();
}
<span class="type">int</span> Boat<span class="operator">::</span>bombsLaunched() <span class="keyword">const</span>
{
<span class="keyword">return</span> bombsAlreadyLaunched;
}
<span class="type">void</span> Boat<span class="operator">::</span>setBombsLaunched(<span class="type">int</span> number)
{
<span class="keyword">if</span> (number <span class="operator">></span> MAX_BOMB) {
<a href="qtglobal.html#qWarning">qWarning</a>(<span class="string">"Boat::setBombsLaunched : It impossible to launch that number of bombs"</span>);
<span class="keyword">return</span>;
}
bombsAlreadyLaunched <span class="operator">=</span> number;
}
<span class="type">int</span> Boat<span class="operator">::</span>currentSpeed() <span class="keyword">const</span>
{
<span class="keyword">return</span> speed;
}
<span class="type">void</span> Boat<span class="operator">::</span>setCurrentSpeed(<span class="type">int</span> speed)
{
<span class="keyword">if</span> (speed <span class="operator">></span> <span class="number">3</span> <span class="operator">|</span><span class="operator">|</span> speed <span class="operator"><</span> <span class="number">0</span>) {
<a href="qtglobal.html#qWarning">qWarning</a>(<span class="string">"Boat::setCurrentSpeed: The boat can't run on that speed"</span>);
<span class="keyword">return</span>;
}
<span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>speed <span class="operator">=</span> speed;
}
<span class="keyword">enum</span> Boat<span class="operator">::</span>Movement Boat<span class="operator">::</span>currentDirection() <span class="keyword">const</span>
{
<span class="keyword">return</span> direction;
}
<span class="type">void</span> Boat<span class="operator">::</span>setCurrentDirection(Movement direction)
{
<span class="keyword">this</span><span class="operator">-</span><span class="operator">></span>direction <span class="operator">=</span> direction;
}
<span class="type">int</span> Boat<span class="operator">::</span>type() <span class="keyword">const</span>
{
<span class="keyword">return</span> Type;
}</pre>
</div>
<!-- @@@demos/sub-attaq/boat.cpp -->
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