Qt编写自定义控件33-图片切换动画

原创

feiyangqingyun

修改于 2019-08-28 10:24:44

1.9K0

修改于 2019-08-28 10:24:44

一、前言

在很多看图软件中，切换图片的时候可以带上动画过渡或者切换效果，显得更人性化，其实主要还是炫一些，比如百叶窗、透明度变化、左下角飞入等，无论多少种效果，核心都是围绕QPainter来进行，将各种动画效果对应的图片的区域动态计算并绘制出来，配合以QPropertyAnimation动画属性产生线性插值，比如渐入飞入时候，可以中间快速两端慢速。目前动画类型有9种，后期还会不断增加。

1：图像1渐渐变淡,图像2渐渐显现
2：百叶窗效果
3：图像从右向左翻转
4：从外到内水平分割
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
6：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
7：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
8：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
9：图像1不动,同时图像2从右下到左上

二、实现的功能

1:支持多种等待样式风格圆弧状风格旋转圆风格三角圆弧线条风格圆环风格
2:可设置范围值和当前值
3:可设置前景色背景色
4:可设置顺时针逆时针旋转
5:支持任意大小缩放
6:支持设置旋转速度间隔

三、效果图

四、头文件代码

#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

五、核心代码

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);
}

六、控件介绍

超过149个精美控件，涵盖了各种仪表盘、进度条、进度球、指南针、曲线图、标尺、温度计、导航条、导航栏，flatui、高亮按钮、滑动选择器、农历等。远超qwt集成的控件数量。
每个类都可以独立成一个单独的控件，零耦合，每个控件一个头文件和一个实现文件，不依赖其他文件，方便单个控件以源码形式集成到项目中，较少代码量。qwt的控件类环环相扣，高度耦合，想要使用其中一个控件，必须包含所有的代码。
全部纯Qt编写，QWidget+QPainter绘制，支持Qt4.6到Qt5.12的任何Qt版本，支持mingw、msvc、gcc等编译器，支持任意操作系统比如windows+linux+mac+嵌入式linux等，不乱码，可直接集成到Qt Creator中，和自带的控件一样使用，大部分效果只要设置几个属性即可，极为方便。
每个控件都有一个对应的单独的包含该控件源码的DEMO，方便参考使用。同时还提供一个所有控件使用的集成的DEMO。
每个控件的源代码都有详细中文注释，都按照统一设计规范编写，方便学习自定义控件的编写。
每个控件默认配色和demo对应的配色都非常精美。
超过130个可见控件，6个不可见控件。
部分控件提供多种样式风格选择，多种指示器样式选择。
所有控件自适应窗体拉伸变化。
集成自定义控件属性设计器，支持拖曳设计，所见即所得，支持导入导出xml格式。
自带activex控件demo，所有控件可以直接运行在ie浏览器中。
集成fontawesome图形字体+阿里巴巴iconfont收藏的几百个图形字体，享受图形字体带来的乐趣。
所有控件最后生成一个dll动态库文件，可以直接集成到qtcreator中拖曳设计使用。
目前已经有qml版本，后期会考虑出pyqt版本，如果用户需求量很大的话。