Qt编写自定义控件32-等待进度条控件 - QTCN开发网

#ifndef PROGRESSWAIT_H
#define PROGRESSWAIT_H

/**
* 等待进度条控件作者:feiyangqingyun(QQ:517216493) 2016-10-28
* 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
*/

#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 ProgressWait : public QWidget
#else
class ProgressWait : public QWidget
#endif

{
    Q_OBJECT
    Q_ENUMS(BarStyle)

    Q_PROPERTY(bool clockWise READ getClockWise WRITE setClockWise)
    Q_PROPERTY(bool showPercent READ getShowPercent WRITE setShowPercent)

    Q_PROPERTY(int currentValue READ getCurrentValue WRITE setCurrentValue)
    Q_PROPERTY(int maxValue READ getMaxValue WRITE setMaxValue)
    Q_PROPERTY(int interval READ getInterval WRITE setInterval)

    Q_PROPERTY(BarStyle barStyle READ getBarStyle WRITE setBarStyle)
    Q_PROPERTY(QColor background READ getBackground WRITE setBackground)
    Q_PROPERTY(QColor foreground READ getForeground WRITE setForeground)
    Q_PROPERTY(QColor textColor READ getTextColor WRITE setTextColor)

public:
    enum BarStyle {
        BarStyle_Arc = 0,           //圆弧状风格
        BarStyle_RoundCircle = 1,   //旋转圆风格
        BarStyle_Pie = 2,           //三角圆弧风格
        BarStyle_Line = 3,          //线条风格
        BarStyle_Ring = 4,          //圆环风格
        BarStyle_SingleCircle = 5,  //一个圆闪烁
        BarStyle_DoubleCircle = 6   //两个圆闪烁
    };

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

protected:
    void resizeEvent(QResizeEvent *);
    void paintEvent(QPaintEvent *);
    void drawArc(QPainter *painter);
    void drawRoundCircle(QPainter *painter);
    void drawPie(QPainter *painter);
    void drawLine(QPainter *painter);
    void drawRing(QPainter *painter);
    void drawSingleCircle(QPainter *painter);
    void drawDoubleCircle(QPainter *painter);
    void drawValue(QPainter *painter);

private:
    bool clockWise;                 //顺时针逆时针
    bool showPercent;               //显示当前百分比
    int currentValue;               //当前值
    int maxValue;                   //最大值
    int interval;                   //旋转间隔

    int minRadius;                  //最小半径
    int maxRadius;                  //最大半径
    int offsetRadius;               //半径偏移量
    int leftRadius;                 //左边圆半径
    int rightRadius;                //右边圆半径
    bool leftIncrease;              //左边递增
    bool rightIncrease;             //右边递增

    BarStyle barStyle;              //样式
    QColor background;              //背景色
    QColor foreground;              //前景色
    QColor textColor;               //文字颜色

    QTimer *timer;                  //定时器绘制

private:
    double degreesToRadians(double value);

private slots:
    void updateValue();

public:
    bool getClockWise()             const;
    bool getShowPercent()           const;
    int getCurrentValue()           const;
    int getMaxValue()               const;
    int getInterval()               const;

    BarStyle getBarStyle()          const;
    QColor getBackground()          const;
    QColor getForeground()          const;
    QColor getTextColor()           const;

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

public Q_SLOTS:
    //设置顺时针逆时针旋转
    void setClockWise(bool clockWise);
    //设置是否显示百分比
    void setShowPercent(bool showPercent);
    //设置当前值
    void setCurrentValue(int currentValue);
    //设置最大值
    void setMaxValue(int maxValue);
    //设置旋转速度间隔
    void setInterval(int interval);

    //设置样式
    void setBarStyle(const BarStyle &barStyle);
    //设置前景色
    void setBackground(const QColor &background);
    //设置前景色
    void setForeground(const QColor &foreground);
    //设置文字颜色
    void setTextColor(const QColor &textColor);
};

#endif // PROGRESSWAIT_H

void ProgressWait::paintEvent(QPaintEvent *)
{
    int width = this->width();
    int height = this->height();
    int side = qMin(width, height);

    //绘制准备工作,启用反锯齿,平移坐标轴中心,等比例缩放
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    painter.translate(width / 2, height / 2);
    painter.scale(side / 200.0, side / 200.0);

    if (barStyle == BarStyle_Arc) {
        drawArc(&painter);
    } else if (barStyle == BarStyle_RoundCircle) {
        drawRoundCircle(&painter);
    } else if (barStyle == BarStyle_Pie) {
        drawPie(&painter);
    } else if (barStyle == BarStyle_Line) {
        drawLine(&painter);
    } else if (barStyle == BarStyle_Ring) {
        drawRing(&painter);
    } else if (barStyle == BarStyle_SingleCircle) {
        drawSingleCircle(&painter);
    } else if (barStyle == BarStyle_DoubleCircle) {
        drawDoubleCircle(&painter);
    }

    drawValue(&painter);
}

void ProgressWait::drawArc(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);

    //计算中心点坐标
    int centerX = 0;
    int centerY = 0;
    int radius = 99;
    int radiusBig = radius / 2;
    int radiusSmall = radius / 6;
    double currentangle = currentValue * (360 / (maxValue + 1));

    if (clockWise) {
        currentangle = -currentangle;
    }

    //绘制八卦大圆1
    painter->setBrush(foreground);
    QPainterPath pathBig1(QPointF(centerX + radius * qCos(degreesToRadians(currentangle)),
                                  centerY - radius * qSin(degreesToRadians(currentangle))));
    pathBig1.arcTo(centerX - radius, centerY - radius, radius * 2, radius * 2, currentangle, 180);
    pathBig1.arcTo(centerX + radiusBig * qCos(degreesToRadians(currentangle + 180)) - radiusBig,
                   centerY - radiusBig * qSin(degreesToRadians(currentangle + 180)) - radiusBig,
                   radiusBig * 2, radiusBig * 2, currentangle + 180, 180);
    pathBig1.arcTo(centerX + radiusBig * qCos(degreesToRadians(currentangle)) - radiusBig,
                   centerY - radiusBig * qSin(degreesToRadians(currentangle)) - radiusBig,
                   radiusBig * 2, radiusBig * 2, currentangle + 180, -180
                  );
    painter->drawPath(pathBig1);

    //绘制八卦大圆2
    painter->setBrush(background);
    QPainterPath pathBig2(QPointF(centerX + radius * qCos(degreesToRadians(currentangle)),
                                  centerY - radius * qSin(degreesToRadians(currentangle))));
    pathBig2.arcTo(centerX - radius, centerY - radius, radius * 2, radius * 2, currentangle, -180);
    pathBig2.arcTo(centerX + radiusBig * qCos(degreesToRadians(currentangle + 180)) - radiusBig,
                   centerY - radiusBig * qSin(degreesToRadians(currentangle + 180)) - radiusBig,
                   radiusBig * 2, radiusBig * 2, currentangle + 180, 180);
    pathBig2.arcTo(centerX + radiusBig * qCos(degreesToRadians(currentangle)) - radiusBig,
                   centerY - radiusBig * qSin(degreesToRadians(currentangle)) - radiusBig,
                   radiusBig * 2, radiusBig * 2, currentangle + 180, -180
                  );
    painter->drawPath(pathBig2);

    //绘制八卦小圆1
    painter->setBrush(foreground);
    QPainterPath pathSmall1;
    pathSmall1.addEllipse(centerX + radiusBig * qCos(degreesToRadians(currentangle)) - radiusSmall,
                          centerY - radiusBig * qSin(degreesToRadians(currentangle)) - radiusSmall,
                          radiusSmall * 2, radiusSmall * 2);
    painter->drawPath(pathSmall1);

    //绘制八卦小圆2
    painter->setBrush(background);
    QPainterPath pathSmall2;
    pathSmall2.addEllipse(centerX + radiusBig * qCos(degreesToRadians(180 + currentangle)) - radiusSmall,
                          centerY - radiusBig * qSin(degreesToRadians(180 + currentangle)) - radiusSmall,
                          radiusSmall * 2, radiusSmall * 2);
    painter->drawPath(pathSmall2);

    painter->restore();
}

void ProgressWait::drawRoundCircle(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);

    int radius = 99;
    int minRadius = radius / 6;
    double angleStep = 360.0 / maxValue;
    double alpha = (double)1 / maxValue;

    if (!clockWise) {
        angleStep = -angleStep;
    }

    //计算中心点坐标
    int centerX = 0;
    int centerY = 0;
    double centerRadius = radius / 1.2;

    for (int i = 0; i < maxValue; i++) {
        double angle = (currentValue + i) * angleStep;
        double initX = centerRadius * qCos(degreesToRadians(angle)) + centerX;
        double initY = centerRadius * qSin(degreesToRadians(angle)) + centerY;

        int value = i * alpha * 255;
        value = value < 30 ? 30 : value;

        foreground.setAlpha(value);
        painter->setBrush(foreground);
        painter->drawEllipse(initX - minRadius, initY - minRadius, minRadius * 2, minRadius * 2);
    }

    painter->restore();
}