Qt编写自定义控件33-图片切换动画 - QTCN开发网

#ifndef IMAGEANIMATION_H
#define IMAGEANIMATION_H

/**
* 图片切换动画控件作者:赵彦博(QQ:408815041 zyb920@hotmail.com) 2019-6-10
* 1:可设置动画类型,默认9种,后期会增加更多
* FadeEffect = 0,             //图像1渐渐变淡,图像2渐渐显现
* BlindsEffect = 1,           //百叶窗效果
* FlipRightToLeft = 2,        //图像从右向左翻转
* OutsideToInside = 3,        //从外到内水平分割
* MoveLeftToRightEffect = 4,  //图像1从左至右退出可视区域,同时图像2从左至右进入可视区域
* MoveRightToLeftEffect = 5,  //图像1从左至右退出可视区域,同时图像2从左至右进入可视区域
* MoveBottomToUpEffect = 6,   //图像1从下至上退出可视区域,同时图像2从下至上进入可视区域
* MoveUpToBottomEffect = 7,   //图像1从上至下退出可视区域,同时图像2从上至下进入可视区域
* MoveBottomToLeftUpEffect = 8//图像1不动,同时图像2从右下到左上
* 2:可设置两张图片的路径名称或者图片
* 3:可设置动画因子
*/

#include <QWidget>

class QPropertyAnimation;

#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endif

class QDESIGNER_WIDGET_EXPORT ImageAnimation : public QWidget
#else
class ImageAnimation : public QWidget
#endif

{
    Q_OBJECT
    Q_ENUMS(AnimationType)
    Q_PROPERTY(float factor READ getFactor WRITE setFactor)
    Q_PROPERTY(QString imageName1 READ getImageName1 WRITE setImageName1)
    Q_PROPERTY(QString imageName2 READ getImageName2 WRITE setImageName2)
    Q_PROPERTY(QPixmap pixmap1 READ getPixmap1 WRITE setPixmap1)
    Q_PROPERTY(QPixmap pixmap2 READ getPixmap2 WRITE setPixmap2)
    Q_PROPERTY(AnimationType animationType READ getAnimationType WRITE setAnimationType)

public:
    enum AnimationType {
        FadeEffect = 0,             //图像1渐渐变淡,图像2渐渐显现
        BlindsEffect = 1,           //百叶窗效果
        FlipRightToLeft = 2,        //图像从右向左翻转
        OutsideToInside = 3,        //从外到内水平分割
        MoveLeftToRightEffect = 4,  //图像1从左至右退出可视区域,同时图像2从左至右进入可视区域
        MoveRightToLeftEffect = 5,  //图像1从左至右退出可视区域,同时图像2从左至右进入可视区域
        MoveBottomToUpEffect = 6,   //图像1从下至上退出可视区域,同时图像2从下至上进入可视区域
        MoveUpToBottomEffect = 7,   //图像1从上至下退出可视区域,同时图像2从上至下进入可视区域
        MoveBottomToLeftUpEffect = 8//图像1不动,同时图像2从右下到左上
    };

    explicit ImageAnimation(QWidget *parent = 0);
    ~ImageAnimation();

protected:
    void paintEvent(QPaintEvent *);
    void fadeEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void blindsEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void flipRightToLeft(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void outsideToInside(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void moveLeftToRightEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void moveRightToLeftEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void moveBottomToUpEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void moveUpToBottomEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);
    void moveBottomToLeftUpEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2);

private:
    float factor;                   //动画因子(0 - 1.0之间变化)
    QString imageName1;             //图片1路径名称
    QString imageName2;             //图片2路径名称
    QPixmap pixmap1;                //图片1
    QPixmap pixmap2;                //图片2
    AnimationType animationType;    //动画效果类型

    QPropertyAnimation *animation;  //动画属性

public:
    float getFactor()               const;
    QString getImageName1()         const;
    QString getImageName2()         const;
    QPixmap getPixmap1()            const;
    QPixmap getPixmap2()            const;
    AnimationType getAnimationType()const;

    QSize sizeHint()                const;
    QSize minimumSizeHint()         const;

public Q_SLOTS:
    //设置动画因子
    void setFactor(float factor);

    //设置图片1+图片2路径名称
    void setImageName1(const QString &imageName1);
    void setImageName2(const QString &imageName2);

    //设置图片1+图片2
    void setPixmap1(const QPixmap &pixmap1);
    void setPixmap2(const QPixmap &pixmap2);

    //设置动画类型
    void setAnimationType(const AnimationType &animationType);

    //启动+停止动画
    void start();
    void stop();
};

#endif // IMAGEANIMATION_H

void ImageAnimation::paintEvent(QPaintEvent *)
{
    if (pixmap1.isNull() || pixmap2.isNull()) {
        return;
    }

    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);

    switch (animationType) {
    case 0:
        fadeEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 1:
        blindsEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 2:
        flipRightToLeft(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 3:
        outsideToInside(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 4:
        moveLeftToRightEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 5:
        moveRightToLeftEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 6:
        moveBottomToUpEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 7:
        moveUpToBottomEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    case 8:
        moveBottomToLeftUpEffect(&painter, geometry(), factor, pixmap1, pixmap2);
        break;
    default:
        break;
    }
}

void ImageAnimation::fadeEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2)
{
    int w = rect.width();
    int h = rect.height();
    int alpha = 255 * (1.0f - factor);

    QPixmap alphaPixmap(pixmap1.size());
    alphaPixmap.fill(Qt::transparent);

    QPainter p1(&alphaPixmap);
    p1.setCompositionMode(QPainter::CompositionMode_Source);
    p1.drawPixmap(0, 0, pixmap1);
    p1.setCompositionMode(QPainter::CompositionMode_DestinationIn);
    p1.fillRect(alphaPixmap.rect(), QColor(0, 0, 0, alpha));
    p1.end();

    int x = (w - pixmap1.width()) / 2;
    int y = (h - pixmap1.height()) / 2;
    painter->drawPixmap(x, y, alphaPixmap);

    alpha = 255 * (factor);
    alphaPixmap.fill(Qt::transparent);
    QPainter p2(&alphaPixmap);
    p2.setCompositionMode(QPainter::CompositionMode_Source);
    p2.drawPixmap(0, 0, pixmap2);
    p2.setCompositionMode(QPainter::CompositionMode_DestinationIn);
    p2.fillRect(alphaPixmap.rect(), QColor(0, 0, 0, alpha));
    p2.end();

    painter->drawPixmap(x, y, alphaPixmap);
}

void ImageAnimation::blindsEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2)
{
    int i, n, w, h, x1, y1, x2, y2, dh, ddh;

    w = rect.width();
    h = rect.height();
    x1 = (w - pixmap1.width()) / 2;
    y1 = (h - pixmap1.height()) / 2;
    x2 = (w - pixmap2.width()) / 2;
    y2 = (h - pixmap2.height()) / 2;

    painter->drawPixmap(x1, y1, pixmap1);

    n = 10;
    dh = pixmap2.height() / n;
    ddh = factor * dh;
    if (ddh < 1) {
        ddh = 1;
    }

    for(i = 0; i < n; i++) {
        painter->drawPixmap(x2, y2 + i * dh, pixmap2, 0, i * dh, pixmap2.width(), ddh);
    }
}

void ImageAnimation::flipRightToLeft(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2)
{
    int x1, y1, x2, y2, w, h;
    float rot;
    QTransform trans;

    w = rect.width();
    h = rect.height();
    x1 = (w - pixmap1.width()) / 2;
    y1 = (h - pixmap1.height()) / 2;
    x2 = (w - pixmap2.width()) / 2;
    y2 = (h - pixmap2.height()) / 2;

    rot = factor * 90.0f;
    trans.translate(w * (1 - factor), h / 2);
    trans.rotate(rot, Qt::YAxis);
    trans.translate(-w, -h / 2);

    painter->setTransform(trans);
    painter->drawPixmap(x1, y1, pixmap1);
    painter->resetTransform();

    trans.reset();
    rot = 90 * (factor - 1);
    trans.translate(w * (1 - factor), h / 2);
    trans.rotate(rot, Qt::YAxis);
    trans.translate(0, -h / 2);

    painter->setTransform(trans);
    painter->drawPixmap(x2, y2, pixmap2);
    painter->resetTransform();
}

void ImageAnimation::outsideToInside(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2)
{
    int   w, h, x1, y1, x2, y2, x3, y3, dh, ddh;

    w = rect.width();
    h = rect.height();
    x1 = (w - pixmap1.width()) / 2;
    y1 = (h - pixmap1.height()) / 2;
    painter->drawPixmap(x1, y1, pixmap1);

    dh = pixmap2.height() / 2;
    ddh = factor * dh;
    if (ddh < 1) {
        ddh = 1;
    }

    x2 = (w - pixmap2.width()) / 2;
    y2 = (h - pixmap2.height()) / 2;
    painter->drawPixmap(x2, y2, pixmap2, 0, 0, pixmap2.width(), ddh);

    x3 = (w - pixmap2.width()) / 2;
    y3 =  dh * (1.0f - factor) + h / 2;
    if(y3 != h / 2) {
        y3 += 1;
    }

    painter->drawPixmap(x3, y3, pixmap2, 0, pixmap2.height() - ddh, pixmap2.width(), ddh);
}

void ImageAnimation::moveLeftToRightEffect(QPainter *painter, const QRect &rect, float factor, const QPixmap &pixmap1, const QPixmap &pixmap2)
{
    int x, y, w, h, x1, y1, x2, y2;

    w = rect.width();
    h = rect.height();
    x1 = (w - pixmap1.width()) / 2;
    y1 = (h - pixmap1.height()) / 2;
    x2 = (w - pixmap2.width()) / 2;
    y2 = (h - pixmap2.height()) / 2;

    x = x1 + w * factor;
    y = y1;
    painter->drawPixmap(x, y, pixmap1);

    x = x2 + w * (factor - 1);
    y = y2;
    painter->drawPixmap(x, y, pixmap2);
}