QT动画

2019-11-09 14:17:15

字体：大中小

来源：转载

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本代码通过选择文件导入图片，然后用GraphicsView显示，点击开始动画（渐隐，渐显，变小，变大，旋转）graphiCSSpeak.h#ifndef GRAPHICSITEM_H#define GRAPHICSITEM_H#include <QGraphicsPixmapItem>#include <QGraphicsWidget>#include <QPainter>#include <QRect>#include <QPixmap>#include <QWidget>#include <QDebug>#include <QPRopertyAnimation>#include <QObject>#include <QWindow>class GraphicsItem : public QGraphicsWidget{    Q_OBJECT    Q_PROPERTY(QRectF geometry  READ geometry  WRITE setGeometry)    Q_PROPERTY(QPointF pos READ pos WRITE setPos)    Q_PROPERTY(qreal rotation READ rotation WRITE setRotation)    Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)public:    GraphicsItem(QPixmap *pixmap);    QRectF boundingRect() const;    void paint(QPainter *painter,const QStyleOptionGraphicsItem *option,               QWidget *widget);private:    QRect my_rect;    QPixmap *my_Pixmap;};#endif // GRAPHICSITEM_HgraphicsSpeak.cpp#include "graphicsitem.h"GraphicsItem::GraphicsItem(QPixmap *pixmap){    my_Pixmap = new QPixmap();    my_Pixmap = pixmap;}QRectF GraphicsItem::boundingRect() const{    return QRectF(-this->rect().width()/2,-this->rect().height()/2,this->rect().width(),this->rect().height());}void GraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget){    painter->drawPixmap(boundingRect().toRect(),*my_Pixmap);}MainWindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QGraphicsView>#include <QGraphicsScene>#include <QGraphicsWidget>#include <QPropertyAnimation>#include <QMouseEvent>#include <QFileDialog>#include <QMessageBox>#include "graphicsitem.h"namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();protected:    void mousePressEvent(QMouseEvent *event);private slots:    void on_pushButton_clicked();    void on_pushButton_2_clicked();private:    Ui::MainWindow *ui;    GraphicsItem *my_graphicsItem;    QPropertyAnimation *animation1;    QPropertyAnimation *animation2;    QPropertyAnimation *animation3;    QGraphicsScene *scene;    QPixmap pixmap;};#endif // MAINWINDOW_HMainWindiw.cpp#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    scene = new QGraphicsScene();    scene->setBackgroundBrush(Qt::black);    ui->graphicsView->setScene(scene);    ui->pushButton->setToolTip("选择文件");    animation1 = new QPropertyAnimation();    animation2 = new QPropertyAnimation();    animation3 = new QPropertyAnimation();    animation1->setDuration(3000);    animation1->setStartValue(360);    animation1->setEndValue(0);    animation1->setLoopCount(-1);    animation3->setDuration(3000);    animation3->setStartValue(0);    animation3->setEndValue(1);    animation2->setDuration(5000);    animation2->setStartValue(QRect(0,0,97,46));    animation2->setKeyValueAt(0.5,QRect(0,0,97*4,46*4));    animation2->setEndValue(QRect(-550,-300,97,46));    connect(animation2,SIGNAL(finished()),animation1,SLOT(start()));}MainWindow::~MainWindow(){    delete ui;}void MainWindow::mousePressEvent(QMouseEvent *event){    if(animation2 != NULL&&animation2->state() != QAbstractAnimation::Running){        animation2->start();    }}void MainWindow::on_pushButton_clicked(){    QString path = QFileDialog::getOpenFileName(this, tr("Open Image"), ".", tr("Image Files( *.png)"));    if(!path.isEmpty())    {        ui->lineEdit->setText(path);    }    else{       QMessageBox::warning(NULL,"waring","请选择图片",QMessageBox::Yes|QMessageBox::No,QMessageBox::Yes);    }}void MainWindow::on_pushButton_2_clicked(){    pixmap.load(ui->lineEdit->text());    my_graphicsItem = new GraphicsItem(&pixmap);    scene->addItem(my_graphicsItem);    animation1->setTargetObject(my_graphicsItem);    animation2->setTargetObject(my_graphicsItem);    animation3->setTargetObject(my_graphicsItem);    animation1->setPropertyName("rotation");    animation2->setPropertyName("geometry");    animation3->setPropertyName("opacity");    animation3->start();}main.cpp#include "mainwindow.h"#include <Qapplication>int main(int argc, char *argv[]){    QApplication a(argc, argv);    MainWindow w;    w.show();    return a.exec();}