Qt编写自定义控件41-自定义环形图 - QTCN开发网

#ifndef CUSTOMRING_H
#define CUSTOMRING_H

/**
* 自定义环形图控件整理:feiyangqingyun(QQ:517216493) 2019-7-28
* 原作者:雨田哥(QQ:3246214072)
* 1:可设置是否显示标题+标题文字+标题高度+标题字号
* 2:可设置是否显示图例+图例高度+图例字号
* 3:可设置背景颜色+文字颜色+高亮颜色+标识颜色
* 4:可设置外圆颜色+中间圆颜色+内圆颜色
* 5:可设置外圆数据集合+内圆数据集合
* 6:鼠标悬停突出显示区域并高亮显示文字
* 7:每个区域都可设置对应的颜色+文字描述+百分比
* 8:支持直接字符串设置文字集合和百分比集合
*/

#include <QWidget>

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

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

{
    Q_OBJECT
    Q_PROPERTY(bool showTitle READ getShowTitle WRITE setShowTitle)
    Q_PROPERTY(int titleHeight READ getTitleHeight WRITE setTitleHeight)
    Q_PROPERTY(int titleFontSize READ getTitleFontSize WRITE setTitleFontSize)
    Q_PROPERTY(QString title READ getTitle WRITE setTitle)

    Q_PROPERTY(bool showLegend READ getShowLegend WRITE setShowLegend)
    Q_PROPERTY(int legendHeight READ getLegendHeight WRITE setLegendHeight)
    Q_PROPERTY(int legendFontSize READ getLegendFontSize WRITE setLegendFontSize)

    Q_PROPERTY(QColor bgColor READ getBgColor WRITE setBgColor)
    Q_PROPERTY(QColor textColor READ getTextColor WRITE setTextColor)
    Q_PROPERTY(QColor highColor READ getHighColor WRITE setHighColor)
    Q_PROPERTY(QColor flagColor READ getFlagColor WRITE setFlagColor)

    Q_PROPERTY(QColor outCircleColor READ getOutCircleColor WRITE setOutCircleColor)
    Q_PROPERTY(QColor midCircleColor READ getMidCircleColor WRITE setMidCircleColor)
    Q_PROPERTY(QColor inCircleColor READ getInCircleColor WRITE setInCircleColor)

    Q_PROPERTY(QString outPieInfos READ getOutPieInfos WRITE setOutPieInfos)
    Q_PROPERTY(QString inPieInfos READ getInPieInfos WRITE setInPieInfos)

public:
    struct RingData {
        int offset;         //鼠标移上去往外边突出显示的偏移距离
        int percent;        //百分比
        QColor color;       //背景色
        QString text;       //文本
        QPainterPath path;  //区域路径

        RingData()
        {
            offset = 0;
            percent = 0;
            color = QColor(0, 192, 133);
            text = "";
        }
    };

    CustomRing(QWidget *parent = 0);
    ~CustomRing();

protected:
    void mouseMoveEvent(QMouseEvent *event);
    void paintEvent(QPaintEvent *);
    void drawBg(QPainter *painter);
    void drawOutCircle(QPainter *painter);
    void drawOutPie(QPainter *painter, qreal scale, QPoint center);
    void drawMidCircle(QPainter *painter);
    void drawInPie(QPainter *painter, qreal scale, QPoint center);
    void drawInCircle(QPainter *painter);
    void drawTitle(QPainter *painter);
    void drawLegendText(QPainter *painter, qreal scale);

private:
    bool showTitle;             //显示标题
    int titleHeight;            //标题高度
    int titleFontSize;          //标题字号
    QString title;              //标题

    bool showLegend;            //显示图例
    int legendHeight;           //图例高度
    int legendFontSize;         //图例字号

    QColor bgColor;             //背景颜色
    QColor textColor;           //文字颜色
    QColor highColor;           //高亮颜色
    QColor flagColor;           //标题左侧标识颜色

    QColor outCircleColor;      //外圆颜色
    QColor midCircleColor;      //中间圆颜色
    QColor inCircleColor;       //里边圆颜色

    QString outPieInfos;        //外边饼图数据
    QString inPieInfos;         //里边饼图数据
    QList<QColor> outPieColors; //饼图颜色集合,在设置字符串时候用
    QList<QColor> inPieColors;  //饼图颜色集合,在设置字符串时候用

    QList<RingData> outPieInfo; //外边饼图数据
    QList<RingData> inPieInfo;  //里边饼图数据

public:
    bool getShowTitle()         const;
    int getTitleHeight()        const;
    int getTitleFontSize()      const;
    QString getTitle()          const;

    bool getShowLegend()        const;
    int getLegendHeight()       const;
    int getLegendFontSize()     const;

    QColor getBgColor()         const;
    QColor getTextColor()       const;
    QColor getHighColor()       const;
    QColor getFlagColor()       const;

    QColor getOutCircleColor()  const;
    QColor getMidCircleColor()  const;
    QColor getInCircleColor()   const;

    QString getOutPieInfos()    const;
    QString getInPieInfos()     const;

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

public Q_SLOTS:
    //显示标题+标题栏高度+标题字号+标题文字
    void setShowTitle(bool showTitle);
    void setTitleHeight(int titleHeight);
    void setTitleFontSize(int titleFontSize);
    void setTitle(const QString &title);

    //显示图例+图例高度+图例字号
    void setShowLegend(bool showLegend);
    void setLegendHeight(int legendHeight);
    void setLegendFontSize(int legendFontSize);

    //设置背景颜色+文字颜色+高亮颜色+标识颜色
    void setBgColor(const QColor &bgColor);
    void setTextColor(const QColor &textColor);
    void setHighColor(const QColor &highColor);
    void setFlagColor(const QColor &flagColor);

    //设置外圆颜色+中间圆颜色+里边圆颜色
    void setOutCircleColor(const QColor &outCircleColor);
    void setMidCircleColor(const QColor &midCircleColor);
    void setInCircleColor(const QColor &inCircleColor);

    //字符串形式设置数据
    void setOutPieInfos(const QString &outPieInfos);
    void setInPieInfos(const QString &inPieInfos);

    //设置颜色集合
    void setOutPieColors(const QList<QColor> &outPieColors);
    void setInPieColors(const QList<QColor> &inPieColors);

    //清空+设置饼图数据
    void clearOutPie();
    void clearInPie();
    void appendOutPie(const RingData &data);
    void appendInPie(const RingData &data);
};

#endif // CUSTOMRING_H

void CustomRing::paintEvent(QPaintEvent *)
{
    //绘制准备工作,启用反锯齿
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);

    int titleHeight = showTitle ? this->titleHeight : 0;
    int legendHeight = showLegend ? this->legendHeight : 0;
    QRect rect(0, titleHeight, this->width(), this->height() - titleHeight - legendHeight);
    int side = qMin(rect.width(), rect.height());
    qreal scale = side / 200.0;

    //绘制背景
    drawBg(&painter);

    //平移坐标轴中心,等比例缩放
    painter.save();
    painter.translate(rect.center());
    painter.scale(scale, scale);

    //绘制外圆背景
    drawOutCircle(&painter);
    //绘制外层饼图
    drawOutPie(&painter, scale, rect.center());
    //绘制中间圆
    drawMidCircle(&painter);
    //绘制里层饼图
    drawInPie(&painter, scale, rect.center());
    //绘制里边圆
    drawInCircle(&painter);

    painter.restore();

    //重新等比例缩放,绘制文字,文字放在后面绘制是为了不被圆遮挡
    painter.scale(scale, scale);

    //绘制标题
    if (showTitle) {
        drawTitle(&painter);
    }

    //绘制图例文字
    if (showLegend) {
        drawLegendText(&painter, scale);
    }
}

void CustomRing::drawBg(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);
    painter->setBrush(bgColor);
    painter->drawRoundedRect(this->rect(), 5, 5);
    painter->restore();
}

void CustomRing::drawOutCircle(QPainter *painter)
{
    int radius = 90;
    painter->save();
    painter->setPen(Qt::NoPen);
    painter->setBrush(outCircleColor);
    painter->drawEllipse(QPoint(0, 0), radius, radius);
    painter->restore();
}

void CustomRing::drawMidCircle(QPainter *painter)
{
    int radius = 50;
    painter->save();
    painter->setPen(Qt::NoPen);
    painter->setBrush(midCircleColor);
    painter->drawEllipse(QPoint(0, 0), radius, radius);
    painter->restore();
}

void CustomRing::drawInCircle(QPainter *painter)
{
    int radius = 10;
    painter->save();
    painter->setPen(Qt::NoPen);
    painter->setBrush(inCircleColor);
    painter->drawEllipse(QPoint(0, 0), radius, radius);
    painter->restore();
}