qt5base-lts/examples/animation/sub-attaq/torpedo.cpp
Casper van Donderen e0d5221957 Move all other demos in qtbase to examples.
Change-Id: Iab0e7364d1f6b348d0e3033ea9304139f5bd6d0d
Reviewed-on: http://codereview.qt.nokia.com/617
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: David Boddie
2011-06-24 16:47:24 +02:00

115 lines
3.9 KiB
C++

/****************************************************************************
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//Own
#include "torpedo.h"
#include "pixmapitem.h"
#include "boat.h"
#include "graphicsscene.h"
#include "animationmanager.h"
#include "qanimationstate.h"
#include <QtCore/QPropertyAnimation>
#include <QtCore/QStateMachine>
#include <QtCore/QFinalState>
Torpedo::Torpedo() : PixmapItem(QString::fromLatin1("torpedo"),GraphicsScene::Big),
currentSpeed(0)
{
setZValue(2);
}
void Torpedo::launch()
{
QPropertyAnimation *launchAnimation = new QPropertyAnimation(this, "pos");
AnimationManager::self()->registerAnimation(launchAnimation);
launchAnimation->setEndValue(QPointF(x(),qobject_cast<GraphicsScene *>(scene())->sealLevel() - 15));
launchAnimation->setEasingCurve(QEasingCurve::InQuad);
launchAnimation->setDuration(y()/currentSpeed*10);
connect(launchAnimation,SIGNAL(valueChanged(QVariant)),this,SLOT(onAnimationLaunchValueChanged(QVariant)));
connect(this,SIGNAL(torpedoExploded()), launchAnimation, SLOT(stop()));
//We setup the state machine of the torpedo
QStateMachine *machine = new QStateMachine(this);
//This state is when the launch animation is playing
QAnimationState *launched = new QAnimationState(machine);
launched->setAnimation(launchAnimation);
//End
QFinalState *final = new QFinalState(machine);
machine->setInitialState(launched);
//### Add a nice animation when the torpedo is destroyed
launched->addTransition(this, SIGNAL(torpedoExploded()),final);
//If the animation is finished, then we move to the final state
launched->addTransition(launched, SIGNAL(animationFinished()), final);
//The machine has finished to be executed, then the boat is dead
connect(machine,SIGNAL(finished()),this, SIGNAL(torpedoExecutionFinished()));
machine->start();
}
void Torpedo::setCurrentSpeed(int speed)
{
if (speed < 0) {
qWarning("Torpedo::setCurrentSpeed : The speed is invalid");
return;
}
currentSpeed = speed;
}
void Torpedo::onAnimationLaunchValueChanged(const QVariant &)
{
foreach (QGraphicsItem *item , collidingItems(Qt::IntersectsItemBoundingRect)) {
if (Boat *b = qgraphicsitem_cast<Boat*>(item))
b->destroy();
}
}
void Torpedo::destroy()
{
emit torpedoExploded();
}