QT 图形视图框架

学习QT已有一个月了，既写过媒体播放器也写过数据库方面的，突然萌发了写写游戏的想法

然后随便写了一个俄罗斯方块游戏，发现挺麻烦，然后无意中看到图形视图框架自带碰撞检测

所以，今天就来学习这框架，关于这框架的介绍以及使用方法网上有很多就不一一说了

首先建个项目。。。

GameView.h

#ifndef GAMEVIEW_H
#define GAMEVIEW_H
#include <QGraphicsView>
class GameView : public QGraphicsView
{
Q_OBJECT
public:
GameView(QGraphicsScene *Scene = 0);
~GameView();
};
#endif // GAMEVIEW_H

GameView.cpp

#include "gameview.h"
#include <QGraphicsPixmapItem>
GameView::GameView(QGraphicsScene *Scene):QGraphicsView(Scene)
{
}
GameView::~GameView()
{
}

main.cpp

#include "gameview.h"
#include <QTime>
#include <QApplication>
#include <QGraphicsScene>
int main(int argc, char *argv[])
{
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));//后期用
QApplication a(argc, argv);
QGraphicsScene *Scene = new QGraphicsScene;
GameView w(Scene);
w.show();
return a.exec();
}

嗯嗯，挺好，现在运行一下~~呀？白色的底！神马都木有，，，，这很正常嘛~来添加个小Item

SingleAnimation.h

#ifndef SINGLEANIMATION_H
#define SINGLEANIMATION_H
#include <QtWidgets> //测试中为了方便就用这个了
class SingleAnimation
:public QObject
,public QGraphicsItem
{
Q_OBJECT
public:
SingleAnimation();
SingleAnimation(const QList<QPixmap> &PixmapList, const int &PlaySpeed);
SingleAnimation(const QString &FileName);
QSize getSize()const{return QSize(m_PixmapList[0].width(),m_PixmapList[0].height());}
void start();
bool isEmpty();
void setloop(const bool &loop);
void setPixmapList(const QList<QPixmap> &PixmapList, const int &PlaySpeed);
QRectF boundingRect() const;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
signals:
void finished();
private:
bool m_loop;
int m_Index;
int m_PlaySpeed;
QBasicTimer *m_Time;
QList<QPixmap> m_PixmapList;
protected:
void timerEvent(QTimerEvent *event);
};
#endif // SINGLEANIMATION_H


SingleAnimation.cpp

#include "singleanimation.h"
SingleAnimation::SingleAnimation()
:m_Index(0)
{
}
SingleAnimation::SingleAnimation(const QList<QPixmap> &PixmapList, const int &PlaySpeed)
:m_Index(0)
{
setPixmapList(PixmapList,PlaySpeed);
}
SingleAnimation::SingleAnimation(const QString &FileName)
:m_Index(0)
{
QMovie *Movie = new QMovie(FileName);
int &&Count = Movie->frameCount();
for(int i=0;i<Count;i++)
{
Movie->jumpToFrame(i);
m_PixmapList <<Movie->currentPixmap();
}
m_PlaySpeed = Movie->speed();
}
void SingleAnimation::start()
{
m_Time = new QBasicTimer;
m_Time->start(m_PlaySpeed,this);
}
bool SingleAnimation::isEmpty()
{
return m_PixmapList.isEmpty();
}
void SingleAnimation::setloop(const bool &loop)
{
m_loop = loop;
}
void SingleAnimation::setPixmapList(const QList<QPixmap> &PixmapList, const int &PlaySpeed)
{
m_PixmapList = PixmapList;
m_PlaySpeed = PlaySpeed;
}
QRectF SingleAnimation::boundingRect() const
{
if(m_PixmapList.isEmpty())
return QRectF();
qreal penWidth = 1;
return QRectF(0 - penWidth / 2, 0 - penWidth / 2,
m_PixmapList[0].width() + penWidth, m_PixmapList[0].height() + penWidth);
}
void SingleAnimation::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget);
Q_UNUSED(option);
if(m_PixmapList.isEmpty())
return;
painter->drawPixmap(0,0
,m_PixmapList[m_Index].width()
,m_PixmapList[m_Index].height()
,m_PixmapList[m_Index]);
this->update();
}
void SingleAnimation::timerEvent(QTimerEvent *event)
{
if(m_PixmapList.isEmpty())
return;
if(event->timerId() == m_Time->timerId())
{
if(m_Index == m_PixmapList.count()-1)
{
if(m_loop)
{
m_Index = ++m_Index % m_PixmapList.count();
}
else
{
m_Time->stop();
emit finished();
delete this;
return;
}
}
m_Index++;
}
}

嗯。。。这类是播放一组图片用的

来看看效果~

在GameView构造加上这段

for(int i=0;i<5;i++)
{
SingleAnimation *Anima = new SingleAnimation(u8"E:/素材/_826553c5d55dea50/img/blow.gif");
Scene->addItem(Anima);
Anima->setloop(true);
Anima->start();
Anima->setPos(i*Anima->getSize().width(),0);
}



(●'◡'●)。。。今天就这样啦

顺便这是一个游戏对象类的UML求协作者