Qt視窗動畫-淡入淡出-移動-縮放

SubWidget.h

#ifndef SUBWIDGET_H
#define SUBWIDGET_H
#include <QPainter>
#include <QWidget>
#include <QPaintEvent>
#include <QStyleOption>
class SubWidget : public QWidget
{
    Q_OBJECT
public:
    SubWidget(QWidget *parent = nullptr);
    ~SubWidget();
protected:
    void paintEvent(QPaintEvent *e);
};
#endif
           

SubWidget.cpp

#include "SubWidget.h"
SubWidget::SubWidget(QWidget *parent) : QWidget(parent)
{
    setStyleSheet("QWidget{background-color:  rgb(116, 220, 255);}");
}
SubWidget::~SubWidget(){}
void SubWidget::paintEvent(QPaintEvent *e)
{
    QPainter paint(this);
    QStyleOption option;
    option.init(this);
    style()->drawPrimitive(QStyle::PE_Widget, &option, &paint, this);
    QWidget::paintEvent(e);
}
           

MainWidget.h

#ifndef MAINWIDGET_H
#define MAINWIDGET_H
#include <QWidget>
#include <QPushButton>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QPropertyAnimation>
#include <QGraphicsOpacityEffect>
#include "SubWidget.h"
class MainWidget : public QWidget
{
    Q_OBJECT
private:
    QPushButton* btnFadeIn;
    QPushButton* btnFadeOut;
    QPushButton* btnZoonIn;
    QPushButton* btnZoonOut;
    QPushButton* btnMoveIn;
    QPushButton* btnMoveOut;
    QHBoxLayout* btnLayout;
    QVBoxLayout* mainLayout;
    SubWidget* subWidget;
public:
    MainWidget(QWidget *parent = nullptr);
    ~MainWidget();
};
#endif
           

MainWidget.cpp

#include "MainWidget.h"
constexpr int widgetWidth=600;
constexpr int widgetHeight=400;
MainWidget::MainWidget(QWidget *parent) : QWidget(parent)
{
    setFixedSize(widgetWidth,widgetHeight);
    btnFadeIn  =new QPushButton(this);
    btnFadeOut  =new QPushButton(this);
    btnZoonIn  =new QPushButton(this);
    btnZoonOut  =new QPushButton(this);
    btnMoveIn  =new QPushButton(this);
    btnMoveOut  =new QPushButton(this);
    btnLayout=new QHBoxLayout();
    mainLayout=new QVBoxLayout();
    subWidget=new SubWidget(this);
    subWidget->hide();
    btnFadeIn->setText(tr("FadeIn"));
    btnFadeOut->setText(tr("FadeOut"));
    btnZoonIn->setText(tr("ZoonIn"));
    btnZoonOut->setText(tr("ZoonOut"));
    btnMoveIn->setText(tr("MoveIn"));
    btnMoveOut->setText(tr("MoveOut"));
    btnLayout->setMargin(0);
    btnLayout->setSpacing(9);
    btnLayout->addWidget(btnFadeIn);
    btnLayout->addWidget(btnFadeOut);
    btnLayout->addWidget(btnZoonIn);
    btnLayout->addWidget(btnZoonOut);
    btnLayout->addWidget(btnMoveIn);
    btnLayout->addWidget(btnMoveOut);
    mainLayout->setMargin(9);
    mainLayout->addLayout(btnLayout);
    mainLayout->addStretch(1);
    setLayout(mainLayout);
    //淡入
    connect(btnFadeIn,&QPushButton::clicked,this,[=](bool){
        subWidget->setFixedSize(widgetWidth-20,widgetHeight-50);
        subWidget->setGeometry(10,40,subWidget->width(),subWidget->height());
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setDuration(2000);
        QGraphicsOpacityEffect* m_pOpacity = new QGraphicsOpacityEffect();
        subWidget-> setGraphicsEffect(m_pOpacity);
        m_pOpacity->setOpacity(1);
        m_pAnimation->setTargetObject(m_pOpacity);
        m_pAnimation->setPropertyName("opacity");
        m_pAnimation->setStartValue(0);
        m_pAnimation->setEndValue(1);
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation,m_pOpacity]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(m_pOpacity!=Q_NULLPTR){
                delete m_pOpacity;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });    
	//淡出
    connect(btnFadeOut,&QPushButton::clicked,this,[=](bool){
        subWidget->setFixedSize(widgetWidth-20,widgetHeight-50);
        subWidget->setGeometry(10,40,subWidget->width(),subWidget->height());
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setDuration(2000);
        QGraphicsOpacityEffect* m_pOpacity = new QGraphicsOpacityEffect();
        subWidget-> setGraphicsEffect(m_pOpacity);
        m_pOpacity->setOpacity(1);
        m_pAnimation->setTargetObject(m_pOpacity);
        m_pAnimation->setPropertyName("opacity");
        m_pAnimation->setStartValue(1);
        m_pAnimation->setEndValue(0);
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation,m_pOpacity]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(m_pOpacity!=Q_NULLPTR){
                delete m_pOpacity;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });
    //變大
    connect(btnZoonIn,&QPushButton::clicked,this,[=](bool){
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setPropertyName("geometry");
        m_pAnimation->setDuration(2000);
        QRect stopRect  = QRect(10,40,widgetWidth-20,widgetHeight-50);
        QRect startRect = QRect(stopRect.center(), QSize(0, 0));
        m_pAnimation->setStartValue(startRect);
        m_pAnimation->setEndValue(stopRect);
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });
    
	//變小
    connect(btnZoonOut,&QPushButton::clicked,this,[=](bool){
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setPropertyName("geometry");
        m_pAnimation->setDuration(2000);
        QRect startRect = QRect(10,40,widgetWidth-20,widgetHeight-50);
        QRect stopRect = QRect(startRect.center(), QSize(0, 0));
        m_pAnimation->setStartValue(startRect);
        m_pAnimation->setEndValue(stopRect);
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });
    //移入
    connect(btnMoveIn,&QPushButton::clicked,this,[=](bool){
        subWidget->setFixedSize(widgetWidth-20,widgetHeight-50);
        subWidget->setGeometry(10,40,subWidget->width(),subWidget->height());
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setPropertyName("pos");
        m_pAnimation->setDuration(2000);
        m_pAnimation->setEndValue (QPoint(0,40));
        m_pAnimation->setStartValue(QPoint(width(), 40));
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });
    
	//移出
    connect(btnMoveOut,&QPushButton::clicked,this,[=](bool){
        subWidget->setFixedSize(widgetWidth-20,widgetHeight-50);
        subWidget->setGeometry(10,40,subWidget->width(),subWidget->height());
        QPropertyAnimation* m_pAnimation = new QPropertyAnimation();
        m_pAnimation->setTargetObject(subWidget);
        m_pAnimation->setPropertyName("pos");
        m_pAnimation->setDuration(2000);
        m_pAnimation->setStartValue(QPoint(0,40));
        m_pAnimation->setEndValue(QPoint(width(), 40));
        m_pAnimation->start();
        subWidget->show();
        connect(m_pAnimation,&QPropertyAnimation::finished,this,[subWidget=subWidget,m_pAnimation]{
            if(m_pAnimation!=Q_NULLPTR){
                delete m_pAnimation;
            }
            if(subWidget!=Q_NULLPTR){
                subWidget->hide();
            }
        });
    });
}
MainWidget::~MainWidget()
{
    if(btnLayout!=Q_NULLPTR){
        delete btnLayout;
        btnLayout=Q_NULLPTR;
    }
    if(mainLayout!=Q_NULLPTR){
        delete  mainLayout;
        mainLayout=Q_NULLPTR;
    }
}
           

main.cpp

#include "MainWidget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWidget mainWidget;
    mainWidget.show();
    return a.exec();
}