Qt编写自定义控件40-导航进度条 - QTCN开发网

#ifndef NAVPROGRESS_H
#define NAVPROGRESS_H

/**
* 导航进度条控件作者:feiyangqingyun(QQ:517216493) 2016-11-29
* 1:可设置前景色/背景色/当前值前景色/当前值背景色
* 2:可设置最大步数及当前第几步
* 3:可设置导航标签队列文字信息
* 4:可设置三种风格样式京东订单流程样式/淘宝订单流程样式/支付宝订单流程样式
* 5:文字自适应大小
*/

#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 NavProgress : public QWidget
#else
class NavProgress : public QWidget
#endif

{
    Q_OBJECT
    Q_ENUMS(NavStyle)

    Q_PROPERTY(int maxStep READ getMaxStep WRITE setMaxStep)
    Q_PROPERTY(int currentStep READ getCurrentStep WRITE setCurrentStep)
    Q_PROPERTY(NavStyle navStyle READ getNavStyle WRITE setNavStyle)

    Q_PROPERTY(QColor background READ getBackground WRITE setBackground)
    Q_PROPERTY(QColor foreground READ getForeground WRITE setForeground)
    Q_PROPERTY(QColor currentBackground READ getCurrentBackground WRITE setCurrentBackground)
    Q_PROPERTY(QColor currentForeground READ getCurrentForeground WRITE setCurrentForeground)

public:
    enum NavStyle {
        NavStyle_JD = 0,    //京东订单流程样式
        NavStyle_TB = 1,    //淘宝订单流程样式
        NavStyle_ZFB = 2    //支付宝订单流程样式
    };

    explicit NavProgress(QWidget *parent = 0);

protected:
    void paintEvent(QPaintEvent *);
    void drawBg_JD(QPainter *painter);
    void drawText_JD(QPainter *painter);
    void drawCurrentBg_JD(QPainter *painter);
    void drawCurrentText_JD(QPainter *painter);
    void drawBg_TB(QPainter *painter);
    void drawText_TB(QPainter *painter);
    void drawCurrentBg_TB(QPainter *painter);
    void drawBg_ZFB(QPainter *painter);
    void drawText_ZFB(QPainter *painter);
    void drawCurrentBg_ZFB(QPainter *painter);

private:
    QStringList topInfo;            //导航顶部标签数据
    QStringList bottomInfo;         //导航底部标签数据

    int maxStep;                    //最大步数
    int currentStep;                //当前第几步
    NavStyle navStyle;              //导航样式

    QColor background;              //背景色
    QColor foreground;              //前景色
    QColor currentBackground;       //当前背景色
    QColor currentForeground;       //当前前景色

    QFont iconFont;                 //图形字体

public:
    QStringList getTopInfo()        const;
    QStringList getBottomInfo()     const;

    int getMaxStep()                const;
    int getCurrentStep()            const;
    NavStyle getNavStyle()          const;

    QColor getBackground()          const;
    QColor getForeground()          const;
    QColor getCurrentBackground()   const;
    QColor getCurrentForeground()   const;

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

public Q_SLOTS:
    //设置导航顶部标签数据
    void setTopInfo(const QStringList &topInfo);
    //设置导航底部标签数据
    void setBottomInfo(const QStringList &bottomInfo);

    //设置最大步数
    void setMaxStep(int maxStep);
    //设置当前第几步
    void setCurrentStep(int currentStep);
    //设置导航样式
    void setNavStyle(const NavStyle &navStyle);

    //设置前景色
    void setBackground(const QColor &background);
    //设置前景色
    void setForeground(const QColor &foreground);
    //设置当前前景色
    void setCurrentBackground(const QColor ¤tBackground);
    //设置当前前景色
    void setCurrentForeground(const QColor ¤tForeground);
};

#endif // NAVPROGRESS_H

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

    //根据不一样的样式绘制
    if (navStyle == NavStyle_JD) {
        //绘制背景
        drawBg_JD(&painter);
        //绘制文字
        drawText_JD(&painter);
        //绘制当前背景
        drawCurrentBg_JD(&painter);
        //绘制当前文字
        drawCurrentText_JD(&painter);
    } else if (navStyle == NavStyle_TB) {
        //绘制背景
        drawBg_TB(&painter);
        //绘制文字
        drawText_TB(&painter);
        //绘制当前背景
        drawCurrentBg_TB(&painter);
    } else if (navStyle == NavStyle_ZFB) {
        //绘制背景
        drawBg_ZFB(&painter);
        //绘制文字
        drawText_ZFB(&painter);
        //绘制当前背景
        drawCurrentBg_ZFB(&painter);
    }
}

void NavProgress::drawBg_JD(QPainter *painter)
{
    painter->save();

    //圆半径为高度一定比例,计算宽度,将宽度等分
    int width = this->width() / maxStep;
    int height = this->height() / 2;
    int radius = height / 2;
    int initX = 0;
    int initY = height / 2 + radius / 5;

    //逐个绘制连接线条
    initX = width / 2;

    QPen pen;
    pen.setWidthF((double)radius / 4);
    pen.setCapStyle(Qt::RoundCap);
    pen.setColor(background);
    painter->setPen(pen);
    painter->setBrush(Qt::NoBrush);

    for (int i = 0; i < maxStep - 1; i++) {
        painter->drawLine(QPoint(initX, initY), QPoint(initX + width, initY));
        initX += width;
    }

    //逐个绘制圆
    initX = width / 2;
    painter->setPen(Qt::NoPen);
    painter->setBrush(background);

    for (int i = 0; i < maxStep; i++) {
        painter->drawEllipse(QPoint(initX, initY), radius, radius);
        initX += width;
    }

    //逐个绘制圆中的数字
    initX = width / 2;
    QFont font;
    font.setPixelSize(radius);
    painter->setFont(font);
    painter->setPen(foreground);
    painter->setBrush(Qt::NoBrush);

    for (int i = 0; i < maxStep; i++) {
        QRect textRect(initX - radius, initY - radius, radius * 2, radius * 2);
        painter->drawText(textRect, Qt::AlignCenter, QString::number(i + 1));
        initX += width;
    }

    painter->restore();
}

void NavProgress::drawText_JD(QPainter *painter)
{
    int width = this->width() / maxStep;
    int height = this->height() / 2;
    int initX = 0;
    int initY = height;

    painter->save();
    QFont font;
    font.setPixelSize(height / 3);
    painter->setFont(font);
    painter->setPen(background);
    painter->setBrush(Qt::NoBrush);

    for (int i = 0; i < maxStep; i++) {
        QRect textRect(initX, initY, width, height);
        painter->drawText(textRect, Qt::AlignCenter, topInfo.at(i));
        initX += width;
    }

    painter->restore();
}