Property animation QPropertyAnimation

widget.h

#include "widget.h"#include "ui_widget.h"#include #include Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget){ui->setupUi(this);propertyAnimation = new QPropertyAnimation(ui->geometryWidget,"geometry");//Set the animation start value, key value, and end value;propertyAnimation->setStartValue(QRect(0,0,100,100));propertyAnimation->setKeyValueAt(0.5,QRect(0,400,200,200));propertyAnimation->setEndValue(QRect(600,400,200,200));//Set the animation often;propertyAnimation->setDuration(2000);//Set the animation cycle;propertyAnimation->setLoopCount(1);//Set animation easing curve; animation motion speed curve;propertyAnimation->setEasingCurve(QEasingCurve::InOutCubic);//set color animation;QGraphicsColorizeEffect *graphicsColorizeEffect = new QGraphicsColorizeEffect(this);ui->colorWidget->setGraphicsEffect(graphicsColorizeEffect);propertyAnimation1 = new QPropertyAnimation(graphicsColorizeEffect,"color");propertyAnimation1->setStartValue(QColor(Qt::black));propertyAnimation1->setEndValue(QColor(Qt::red));propertyAnimation1->setDuration(4000);// opacity animationQGraphicsOpacityEffect *graphicsOpacityEffect = new QGraphicsOpacityEffect(this);ui->colorWidget->setGraphicsEffect(graphicsOpacityEffect);propertyAnimation2 = new QPropertyAnimation(graphicsOpacityEffect,"opacity");propertyAnimation2->setStartValue(0.0);propertyAnimation2->setEndValue(1.0);propertyAnimation2->setDuration(2000);}Widget::~Widget(){delete ui;}void Widget::on_pushButton_clicked(){propertyAnimation->start();propertyAnimation2->start();}void Widget::on_pushButton_2_clicked(){propertyAnimation1->start();}