Qt 简约美观的动画 摆钟风格 第十季

😊 今天给大家分享一个摆钟风格的加载动画 😊
效果如下:

最近工作忙起来了 , 后续再分享其他有趣的加载动画吧.
一共三个文件 , 可以直接编译运行

//main.cpp
#include "LoadingAnimWidget.h"
#include 
#include 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QWidget w;
    w.setWindowTitle("加载动画 第10季");
    QGridLayout * mainLayout = new QGridLayout;

    auto* anim1 = new ThreeMovingZoomingBalls;
    mainLayout->addWidget(anim1,0,0);

    auto* anim2 = new FourRotatingFireBall;
    mainLayout->addWidget(anim2,0,1);

    auto* anim3 = new CookieMonster;
    mainLayout->addWidget(anim3,0,2);

    auto* anim4 = new StickCircle;
    anim4->setStickColor("lime");
    anim4->setStickWidth(16);
    anim4->setStickLength(32);
    mainLayout->addWidget(anim4,1,0);

    auto* anim5 = new PendulumClock;
    mainLayout->addWidget(anim5,1,1);

    auto* anim6 = new AmpereMeter;
    mainLayout->addWidget(anim6,1,2);

    w.setLayout(mainLayout);
    w.show();
    anim1->start();
    anim2->start();
    anim3->start();
    anim4->start();
    anim5->start();
    anim6->start();
    return a.exec();
}

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//LoadingAnimWidget.h
#ifndef LOADINGANIMWIDGET_H
#define LOADINGANIMWIDGET_H
#include 
#include 
class LoadingAnimBase:public QWidget
{
    Q_OBJECT
    Q_PROPERTY(qreal angle READ angle WRITE setAngle)
public:
    LoadingAnimBase(QWidget* parent=nullptr);
    virtual ~LoadingAnimBase();

    qreal angle()const;
    void setAngle(qreal an);
public slots:
    virtual void exec();
    virtual void start();
    virtual void stop();
protected:
    QPropertyAnimation mAnim;
    qreal mAngle;
};
class StickCircle:public LoadingAnimBase
{
    Q_OBJECT
public:
    explicit StickCircle(QWidget* parent = nullptr);
    void setStickLength(qreal len);
    void setStickWidth(qreal len);
    void setStickColor(const QColor& color);
protected:
    void paintEvent(QPaintEvent *event);
private:
    qreal mStickLen;
    qreal mStickWidth;
    QColor mStickColor;
};
class ThreeMovingZoomingBalls:public LoadingAnimBase{//三个一边移动一边缩放的小球
public:
    ThreeMovingZoomingBalls(QWidget* parent = nullptr);
protected:
    void paintEvent(QPaintEvent*);
};
class FourRotatingFireBall:public LoadingAnimBase{//四个旋转的火球,说他是火球是因为快速转动的时候它有残影,看上去像弧线
public:
    FourRotatingFireBall(QWidget* parent = nullptr);
protected:
    void paintEvent(QPaintEvent*);
};
class CookieMonster:public LoadingAnimBase{//一个不停吃饼干的怪兽
public:
    CookieMonster(QWidget* parent = nullptr);
protected:
    void paintEvent(QPaintEvent*);
};
class PendulumClock:public LoadingAnimBase{//吊钟钟摆
public:
    PendulumClock(QWidget* parent = nullptr);
protected:
    void paintEvent(QPaintEvent*);
};
class AmpereMeter :public LoadingAnimBase{//电流表的指针
public:
    AmpereMeter(QWidget* parent = nullptr);
protected:
    void paintEvent(QPaintEvent*);
};

#endif
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//LoadingAnimWidget.cpp
#include "LoadingAnimWidget.h"
#include 
#include 
#include 
#include 
#include 
LoadingAnimBase::LoadingAnimBase(QWidget* parent):QWidget(parent){
    mAnim.setPropertyName("angle");
    mAnim.setTargetObject(this);
    mAnim.setDuration(2000);
    mAnim.setLoopCount(-1);//run forever
    mAnim.setEasingCurve(QEasingCurve::Linear);
    setFixedSize(200,200);
    mAngle = 0;
}
LoadingAnimBase::~LoadingAnimBase(){}
void LoadingAnimBase::exec(){
    if(mAnim.state() == QAbstractAnimation::Stopped){
        start();
    }
    else{
        stop();
    }
}
void LoadingAnimBase::start(){
    mAnim.setStartValue(0);
    mAnim.setEndValue(360);
    mAnim.start();
}
void LoadingAnimBase::stop(){
    mAnim.stop();
}
qreal LoadingAnimBase::angle()const{ return mAngle;}
void LoadingAnimBase::setAngle(qreal an){
    mAngle = an;
    update();
}
StickCircle::StickCircle(QWidget *parent) : LoadingAnimBase(parent),
    mStickLen(-1),mStickWidth(10),mStickColor("black"){}
void StickCircle::setStickLength(qreal len){
    if(len > 0 && len != mStickLen){
        mStickLen = len;
        update();
    }
}
void StickCircle::setStickWidth(qreal len){
    if(len > 0 && len != mStickWidth){
        mStickWidth = len;
        update();
    }
}
void StickCircle::setStickColor(const QColor& color){
    if(color.isValid() && mStickColor != color){
        mStickColor = color;
        update();
    }
}
void StickCircle::paintEvent(QPaintEvent *event){
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing);
    int x = width();
    int y = height();
    qreal ang = mAngle;

    painter.setPen(Qt::NoPen);
    painter.translate(x/2,y/2);
    QColor lightColor = mStickColor;
    lightColor.setAlphaF(0.1);
    const int stickw = mStickWidth;//小棍子的宽度
    qreal stickl = x / 4;//小棍子的长度
    if(mStickLen > 0) stickl = mStickLen;

    QColor highlight = mStickColor;
    const int startIdx = ang / 30;//开头的深色小棍子的索引号
    const int arr[14] = {0,1,2,3,4,5,6,7,8,9,10,11,0,1};
    QList<int> hightlightList{arr[startIdx],arr[startIdx+1],arr[startIdx+2]};
    QList<qreal> alphaList{0.5,0.75,0.99};//三根深色的小棍子的透明度

    for(int i = 0;i < 12;++i){
        if(hightlightList.contains(i)){
            auto hc = highlight;
            hc.setAlphaF(alphaList[0]);
            painter.setBrush(QBrush(hc));
            alphaList.pop_front();
        }
        else {
            painter.setBrush(QBrush(lightColor));
        }
        painter.drawRoundedRect(QRectF(-stickw/2,0.375*y -stickl/2-1,stickw,stickl),stickw/2,stickw/2);
        auto transform = painter.transform();
        transform.rotate(30);
        painter.setTransform(transform);
    }
}
ThreeMovingZoomingBalls::ThreeMovingZoomingBalls(QWidget* parent):LoadingAnimBase(parent){}
void ThreeMovingZoomingBalls::paintEvent(QPaintEvent*){
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setPen(Qt::NoPen);
    painter.setBrush(QBrush("cadetblue"));
    qreal x = width();
    qreal y = height();
    painter.translate(0,y/2);
    const qreal delta = 0.08*x;
    const qreal minr = 0.02*x;
    for(int i = 0;i < 5;++i){
        qreal ang = mAngle + 90*i;
        qreal posx = ang/360*x;
        if(posx > x) posx -= x;
        qreal r = minr + delta * qSin(M_PI / x * posx);
        painter.drawEllipse(QPointF(posx,0),r,r);
    }
}
FourRotatingFireBall::FourRotatingFireBall(QWidget* parent){}
void FourRotatingFireBall::paintEvent(QPaintEvent*){
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    QPen pen;
    pen.setCapStyle(Qt::RoundCap);
    pen.setWidth(12);
    painter.setPen(pen);
    painter.setBrush(Qt::NoBrush);
    const qreal x = width();
    const qreal y = height();
    const qreal r = 0.4*y;
    const qreal maxArc = 30;

    for(int i = 0;i <4;++i){
        painter.resetTransform();
        painter.translate(x/2,y/2);
        painter.rotate(90*i);
        if(i % 2 == 0){
            pen.setColor("lightblue");
            painter.setPen(pen);
        }
        else{
            pen.setColor("lightpink");
            painter.setPen(pen);
        }
        if(mAngle < 30){ //启动火球,画出弧线
            qreal ratio = mAngle / 30;
            painter.drawArc(QRectF(-r,-r,2*r,2*r),16*90,16*-ratio*maxArc);
        }
        else if(mAngle < 330){//转动两圈
            qreal ratio = (mAngle - 30) / 300;
            painter.rotate((720-maxArc)*ratio);
            painter.drawArc(QRectF(-r,-r,2*r,2*r),16*90,16*-maxArc);
        }
        else{//收起弧线
            qreal ratio = (mAngle - 330) / 30;
            painter.drawArc(QRectF(-r,-r,2*r,2*r),16*90,16*(1-ratio)*maxArc);
        }
    }
}
CookieMonster::CookieMonster(QWidget* parent):LoadingAnimBase(parent){}

void CookieMonster::paintEvent(QPaintEvent*){
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    const qreal x = width();
    const qreal y = height();
    const qreal r = 0.2*x;
    painter.setPen(Qt::NoPen);
    painter.setBrush(QBrush("royalblue"));
    painter.translate(4,y/2);
    qreal startAngle = 22.5 + 22.5*qSin(M_PI / 90 * mAngle + M_PI/2);
    qreal span = 360 - 2*startAngle;
    painter.drawPie(QRectF(0,-r,2*r,2*r),startAngle*16,span*16);
    painter.setBrush(QBrush("white"));
    painter.drawEllipse(QPointF(r*0.8,-r/2),4,4);

    //画移动的小饼干
    painter.setBrush(QBrush("lightgreen"));
    painter.resetTransform();
    painter.translate(x,y/2);
    qreal ratio = mAngle / 360;
    for(int i = 0;i <3;++i){
        ratio += 0.333;
        if(ratio > 1) ratio -= 1;
        painter.drawEllipse(QPointF( -(x-2*r)*ratio,0 ) , 8,8);
    }
}
PendulumClock::PendulumClock(QWidget* parent):LoadingAnimBase(parent){}

void PendulumClock::paintEvent(QPaintEvent*){
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    const qreal x = width();
    const qreal y = height();
    painter.translate(x/2,y/8);
    QPen pen("silver");
    pen.setWidth(4);
    painter.setPen(pen);
    painter.rotate(30*qSin(M_PI/180*mAngle));
    painter.setBrush(QBrush("silver"));
    painter.drawLine(0,0,0,0.6*y);
    painter.translate(0,0.6*y);
    painter.drawEllipse(QPointF(0,0),16,16);
}
AmpereMeter::AmpereMeter(QWidget* parent):LoadingAnimBase(parent){}

void AmpereMeter::paintEvent(QPaintEvent*){
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    const qreal x = width();
    const qreal y = height();
    painter.translate(x/2,y*0.6);
    QPen pen("dimgray");
    pen.setWidth(4);
    painter.setPen(pen);
    painter.setBrush(Qt::NoBrush);
    const qreal r = x*0.4;
    //step1 先画一个表框
    painter.drawArc(QRectF(-r,-r,2*r,2*r),0,180*16);
    //step2 再画半圈刻度
    qreal gap = 180 / 14.0;
    painter.rotate(-90);
    for(int i = 1;i <= 13;++i){
        painter.rotate(gap);
        painter.drawLine(0,-r + 6,0,-r + 8);
    }
    //step3 画指针
    painter.resetTransform();
    painter.translate(x/2,y*0.6);
    painter.rotate(80*qSin(M_PI/180*mAngle));
    painter.drawLine(0,0,0,-r*0.7);

}
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