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50
51//Own
52#include "bomb.h"
53#include "submarine.h"
54#include "animationmanager.h"
55#include "qanimationstate.h"
56
57//Qt
58#include <QFinalState>
59#include <QPropertyAnimation>
60#include <QSequentialAnimationGroup>
61#include <QStateMachine>
62
63Bomb::Bomb() : PixmapItem(QString("bomb"), GraphicsScene::Big)
64{
65 setZValue(2);
66}
67
68void Bomb::launch(Bomb::Direction direction)
69{
70 QSequentialAnimationGroup *launchAnimation = new QSequentialAnimationGroup;
71 AnimationManager::self()->registerAnimation(anim: launchAnimation);
72 qreal delta = direction == Right ? 20 : - 20;
73 QPropertyAnimation *anim = new QPropertyAnimation(this, "pos");
74 anim->setEndValue(QPointF(x() + delta,y() - 20));
75 anim->setDuration(150);
76 launchAnimation->addAnimation(animation: anim);
77 anim = new QPropertyAnimation(this, "pos");
78 anim->setEndValue(QPointF(x() + delta*2, y() ));
79 anim->setDuration(150);
80 launchAnimation->addAnimation(animation: anim);
81 anim = new QPropertyAnimation(this, "pos");
82 anim->setEndValue(QPointF(x() + delta*2,scene()->height()));
83 anim->setDuration(y()/2*60);
84 launchAnimation->addAnimation(animation: anim);
85 connect(sender: anim, signal: &QVariantAnimation::valueChanged, receiver: this, slot: &Bomb::onAnimationLaunchValueChanged);
86 connect(sender: this, signal: &Bomb::bombExploded, receiver: launchAnimation, slot: &QAbstractAnimation::stop);
87 //We setup the state machine of the bomb
88 QStateMachine *machine = new QStateMachine(this);
89
90 //This state is when the launch animation is playing
91 QAnimationState *launched = new QAnimationState(machine);
92 launched->setAnimation(launchAnimation);
93
94 //End
95 QFinalState *finalState = new QFinalState(machine);
96
97 machine->setInitialState(launched);
98
99 //### Add a nice animation when the bomb is destroyed
100 launched->addTransition(obj: this, signal: &Bomb::bombExploded, target: finalState);
101
102 //If the animation is finished, then we move to the final state
103 launched->addTransition(obj: launched, signal: &QAnimationState::animationFinished, target: finalState);
104
105 //The machine has finished to be executed, then the boat is dead
106 connect(sender: machine,signal: &QState::finished, receiver: this, slot: &Bomb::bombExecutionFinished);
107
108 machine->start();
109
110}
111
112void Bomb::onAnimationLaunchValueChanged(const QVariant &)
113{
114 const QList<QGraphicsItem *> colItems =
115 collidingItems(mode: Qt::IntersectsItemBoundingRect);
116 for (QGraphicsItem *item : colItems) {
117 if (item->type() == SubMarine::Type) {
118 SubMarine *s = static_cast<SubMarine *>(item);
119 destroy();
120 s->destroy();
121 }
122 }
123}
124
125void Bomb::destroy()
126{
127 emit bombExploded();
128}
129

source code of qtbase/examples/widgets/animation/sub-attaq/bomb.cpp