qt_demoe/battery/battery.h

#ifndef BATTERY_H
#define BATTERY_H

/**
 * 电池电量控件 作者:feiyangqingyun(QQ:517216493) 2016-10-23
 * 1. 可设置电池电量,动态切换电池电量变化
 * 2. 可设置电池电量警戒值
 * 3. 可设置电池电量正常颜色和报警颜色
 * 4. 可设置边框渐变颜色
 * 5. 可设置电量变化时每次移动的步长
 * 6. 可设置边框圆角角度/背景进度圆角角度/头部圆角角度
 */

#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 Battery : public QWidget
#else
class Battery : public QWidget
#endif

{
    Q_OBJECT    
    Q_PROPERTY(qreal minValue READ getMinValue WRITE setMinValue)
    Q_PROPERTY(qreal maxValue READ getMaxValue WRITE setMaxValue)
    Q_PROPERTY(qreal value READ getValue WRITE setValue)
    Q_PROPERTY(qreal alarmValue READ getAlarmValue WRITE setAlarmValue)

    Q_PROPERTY(qreal step READ getStep WRITE setStep)
    Q_PROPERTY(int borderRadius READ getBorderRadius WRITE setBorderRadius)
    Q_PROPERTY(int bgRadius READ getBgRadius WRITE setBgRadius)
    Q_PROPERTY(int headRadius READ getHeadRadius WRITE setHeadRadius)

    Q_PROPERTY(QColor borderColorStart READ getBorderColorStart WRITE setBorderColorStart)
    Q_PROPERTY(QColor borderColorEnd READ getBorderColorEnd WRITE setBorderColorEnd)

    Q_PROPERTY(QColor alarmColorStart READ getAlarmColorStart WRITE setAlarmColorStart)
    Q_PROPERTY(QColor alarmColorEnd READ getAlarmColorEnd WRITE setAlarmColorEnd)

    Q_PROPERTY(QColor normalColorStart READ getNormalColorStart WRITE setNormalColorStart)
    Q_PROPERTY(QColor normalColorEnd READ getNormalColorEnd WRITE setNormalColorEnd)

public:
    explicit Battery(QWidget *parent = 0);
    ~Battery();

protected:
    void paintEvent(QPaintEvent *);
    void drawBorder(QPainter *painter);
    void drawBg(QPainter *painter);
    void drawHead(QPainter *painter);

private slots:
    void updateValue();

private:    
    qreal minValue;             //最小值
    qreal maxValue;             //最大值
    qreal value;                //目标电量
    qreal alarmValue;           //电池电量警戒值

    qreal step;                 //每次移动的步长
    int borderRadius;           //边框圆角角度
    int bgRadius;               //背景进度圆角角度
    int headRadius;             //头部圆角角度

    QColor borderColorStart;    //边框渐变开始颜色
    QColor borderColorEnd;      //边框渐变结束颜色

    QColor alarmColorStart;     //电池低电量时的渐变开始颜色
    QColor alarmColorEnd;       //电池低电量时的渐变结束颜色

    QColor normalColorStart;    //电池正常电量时的渐变开始颜色
    QColor normalColorEnd;      //电池正常电量时的渐变结束颜色

    bool isForward;             //是否往前移
    qreal currentValue;         //当前电量
    QRectF batteryRect;         //电池主体区域
    QTimer *timer;              //绘制定时器

public:    
    qreal getMinValue()         const;
    qreal getMaxValue()         const;
    qreal getValue()            const;
    qreal getAlarmValue()       const;

    qreal getStep()             const;
    int getBorderRadius()       const;
    int getBgRadius()           const;
    int getHeadRadius()         const;

    QColor getBorderColorStart()const;
    QColor getBorderColorEnd()  const;

    QColor getAlarmColorStart() const;
    QColor getAlarmColorEnd()   const;

    QColor getNormalColorStart()const;
    QColor getNormalColorEnd()  const;

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

public Q_SLOTS:
    //设置范围值
    void setRange(qreal minValue, qreal maxValue);
    void setRange(int minValue, int maxValue);

    //设置最大最小值
    void setMinValue(qreal minValue);
    void setMaxValue(qreal maxValue);

    //设置电池电量值
    void setValue(qreal value);
    void setValue(int value);

    //设置电池电量警戒值
    void setAlarmValue(qreal alarmValue);
    void setAlarmValue(int alarmValue);

    //设置步长
    void setStep(qreal step);
    void setStep(int step);

    //设置边框圆角角度
    void setBorderRadius(int borderRadius);
    //设置背景圆角角度
    void setBgRadius(int bgRadius);
    //设置头部圆角角度
    void setHeadRadius(int headRadius);

    //设置边框渐变颜色
    void setBorderColorStart(const QColor &borderColorStart);
    void setBorderColorEnd(const QColor &borderColorEnd);

    //设置电池电量报警时的渐变颜色
    void setAlarmColorStart(const QColor &alarmColorStart);
    void setAlarmColorEnd(const QColor &alarmColorEnd);

    //设置电池电量正常时的渐变颜色
    void setNormalColorStart(const QColor &normalColorStart);
    void setNormalColorEnd(const QColor &normalColorEnd);

Q_SIGNALS:
    void valueChanged(qreal value);
};

#endif // BATTERY_H