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本帖最后由 liudianwu 于 2019-4-20 18:05 编辑
前言
汽车仪表盘几乎是qt写仪表盘控件中最常见的,一般来说先要求美工做好设计图,然后设计效果图给到程序员,由程序员根据效果来实现,主要靠贴图,这种方法有个好处就是做出来的效果比较逼真,和真实效果图基本上保持一致,而且程序员也不会那么累,基本上入门级别的程序员都可以搞定,效率比较高,缺点是如果用户需要更改某个部件的颜色,比如指针的颜色等,需要重新做效果图贴图才能实现,比较麻烦,还有一点就是如果效果图原图不是很大,则遇到特殊分辨率情况下,可能会有失真的情况,被强制拉伸等。
我一贯都喜欢用painter来绘制,以规避后面几点的缺点,也可以锻炼自己的审美能力,所谓心中有坐标,万物皆painter。
实现的功能
* 1:可设置范围值,支持负数值
* 2:可设置精确度,最大支持小数点后3位
* 3:可设置大刻度数量/小刻度数量
* 4:可设置开始旋转角度/结束旋转角度
* 5:可设置是否启用动画效果以及动画效果每次移动的步长
* 6:可设置外圆背景/内圆背景/饼圆三种颜色/刻度尺颜色/文字颜色
* 7:自适应窗体拉伸,刻度尺和文字自动缩放
* 8:可自由拓展各种渐变色,各圆的半径
* 9:三色圆环按照比例设置范围角度 用户可以自由设置三色占用比例
* 10:圆环样式可选择 三色圆环 当前圆环
* 11:指示器样式可选择 圆形指示器 指针指示器 圆角指针指示器 三角形指示器
效果图
头文件代码
- #ifndef GAUGECAR_H
- #define GAUGECAR_H
- /**
- * 汽车仪表盘控件 作者:feiyangqingyun(QQ:517216493) 2016-11-20
- * 1:可设置范围值,支持负数值
- * 2:可设置精确度,最大支持小数点后3位
- * 3:可设置大刻度数量/小刻度数量
- * 4:可设置开始旋转角度/结束旋转角度
- * 5:可设置是否启用动画效果以及动画效果每次移动的步长
- * 6:可设置外圆背景/内圆背景/饼圆三种颜色/刻度尺颜色/文字颜色
- * 7:自适应窗体拉伸,刻度尺和文字自动缩放
- * 8:可自由拓展各种渐变色,各圆的半径
- * 9:三色圆环按照比例设置范围角度 用户可以自由设置三色占用比例
- * 10:圆环样式可选择 三色圆环 当前圆环
- * 11:指示器样式可选择 圆形指示器 指针指示器 圆角指针指示器 三角形指示器
- */
- #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 GaugeCar : public QWidget
- #else
- class GaugeCar : public QWidget
- #endif
- {
- Q_OBJECT
- Q_ENUMS(PieStyle)
- Q_ENUMS(PointerStyle)
- Q_PROPERTY(double minValue READ getMinValue WRITE setMinValue)
- Q_PROPERTY(double maxValue READ getMaxValue WRITE setMaxValue)
- Q_PROPERTY(double value READ getValue WRITE setValue)
- Q_PROPERTY(int precision READ getPrecision WRITE setPrecision)
- Q_PROPERTY(int scaleMajor READ getScaleMajor WRITE setScaleMajor)
- Q_PROPERTY(int scaleMinor READ getScaleMinor WRITE setScaleMinor)
- Q_PROPERTY(int startAngle READ getStartAngle WRITE setStartAngle)
- Q_PROPERTY(int endAngle READ getEndAngle WRITE setEndAngle)
- Q_PROPERTY(bool animation READ getAnimation WRITE setAnimation)
- Q_PROPERTY(double animationStep READ getAnimationStep WRITE setAnimationStep)
- Q_PROPERTY(QColor outerCircleColor READ getOuterCircleColor WRITE setOuterCircleColor)
- Q_PROPERTY(QColor innerCircleColor READ getInnerCircleColor WRITE setInnerCircleColor)
- Q_PROPERTY(QColor pieColorStart READ getPieColorStart WRITE setPieColorStart)
- Q_PROPERTY(QColor pieColorMid READ getPieColorMid WRITE setPieColorMid)
- Q_PROPERTY(QColor pieColorEnd READ getPieColorEnd WRITE setPieColorEnd)
- Q_PROPERTY(QColor coverCircleColor READ getCoverCircleColor WRITE setCoverCircleColor)
- Q_PROPERTY(QColor scaleColor READ getScaleColor WRITE setScaleColor)
- Q_PROPERTY(QColor pointerColor READ getPointerColor WRITE setPointerColor)
- Q_PROPERTY(QColor centerCircleColor READ getCenterCircleColor WRITE setCenterCircleColor)
- Q_PROPERTY(QColor textColor READ getTextColor WRITE setTextColor)
- Q_PROPERTY(bool showOverlay READ getShowOverlay WRITE setShowOverlay)
- Q_PROPERTY(QColor overlayColor READ getOverlayColor WRITE setOverlayColor)
- Q_PROPERTY(PieStyle pieStyle READ getPieStyle WRITE setPieStyle)
- Q_PROPERTY(PointerStyle pointerStyle READ getPointerStyle WRITE setPointerStyle)
- public:
- enum PieStyle {
- PieStyle_Three = 0, //三色圆环
- PieStyle_Current = 1 //当前圆环
- };
- enum PointerStyle {
- PointerStyle_Circle = 0, //圆形指示器
- PointerStyle_Indicator = 1, //指针指示器
- PointerStyle_IndicatorR = 2, //圆角指针指示器
- PointerStyle_Triangle = 3 //三角形指示器
- };
- explicit GaugeCar(QWidget *parent = 0);
- ~GaugeCar();
- protected:
- void paintEvent(QPaintEvent *);
- void drawOuterCircle(QPainter *painter);
- void drawInnerCircle(QPainter *painter);
- void drawColorPie(QPainter *painter);
- void drawCoverCircle(QPainter *painter);
- void drawScale(QPainter *painter);
- void drawScaleNum(QPainter *painter);
- void drawPointerCircle(QPainter *painter);
- void drawPointerIndicator(QPainter *painter);
- void drawPointerIndicatorR(QPainter *painter);
- void drawPointerTriangle(QPainter *painter);
- void drawRoundCircle(QPainter *painter);
- void drawCenterCircle(QPainter *painter);
- void drawValue(QPainter *painter);
- void drawOverlay(QPainter *painter);
- private slots:
- void updateValue();
- private:
- double minValue; //最小值
- double maxValue; //最大值
- double value; //目标值
- int precision; //精确度,小数点后几位
- int scaleMajor; //大刻度数量
- int scaleMinor; //小刻度数量
- int startAngle; //开始旋转角度
- int endAngle; //结束旋转角度
- bool animation; //是否启用动画显示
- double animationStep; //动画显示时步长
- QColor outerCircleColor; //外圆背景颜色
- QColor innerCircleColor; //内圆背景颜色
- QColor pieColorStart; //饼圆开始颜色
- QColor pieColorMid; //饼圆中间颜色
- QColor pieColorEnd; //饼圆结束颜色
- QColor coverCircleColor; //覆盖圆背景颜色
- QColor scaleColor; //刻度尺颜色
- QColor pointerColor; //指针颜色
- QColor centerCircleColor; //中心圆颜色
- QColor textColor; //文字颜色
- bool showOverlay; //显示遮罩层
- QColor overlayColor; //遮罩层颜色
- PieStyle pieStyle; //饼图样式
- PointerStyle pointerStyle; //指针样式
- bool reverse; //是否往回走
- double currentValue; //当前值
- QTimer *timer; //定时器绘制动画
- public:
- double getMinValue() const;
- double getMaxValue() const;
- double getValue() const;
- int getPrecision() const;
- int getScaleMajor() const;
- int getScaleMinor() const;
- int getStartAngle() const;
- int getEndAngle() const;
- bool getAnimation() const;
- double getAnimationStep() const;
- QColor getOuterCircleColor() const;
- QColor getInnerCircleColor() const;
- QColor getPieColorStart() const;
- QColor getPieColorMid() const;
- QColor getPieColorEnd() const;
- QColor getCoverCircleColor() const;
- QColor getScaleColor() const;
- QColor getPointerColor() const;
- QColor getCenterCircleColor() const;
- QColor getTextColor() const;
- bool getShowOverlay() const;
- QColor getOverlayColor() const;
- PieStyle getPieStyle() const;
- PointerStyle getPointerStyle() const;
- QSize sizeHint() const;
- QSize minimumSizeHint() const;
- public Q_SLOTS:
- //设置范围值
- void setRange(double minValue, double maxValue);
- void setRange(int minValue, int maxValue);
- //设置最大最小值
- void setMinValue(double minValue);
- void setMaxValue(double maxValue);
- //设置目标值
- void setValue(double value);
- void setValue(int value);
- //设置精确度
- void setPrecision(int precision);
- //设置主刻度数量
- void setScaleMajor(int scaleMajor);
- //设置小刻度数量
- void setScaleMinor(int scaleMinor);
- //设置开始旋转角度
- void setStartAngle(int startAngle);
- //设置结束旋转角度
- void setEndAngle(int endAngle);
- //设置是否启用动画显示
- void setAnimation(bool animation);
- //设置动画显示的步长
- void setAnimationStep(double animationStep);
- //设置外圆背景颜色
- void setOuterCircleColor(const QColor &outerCircleColor);
- //设置内圆背景颜色
- void setInnerCircleColor(const QColor &innerCircleColor);
- //设置饼圆三种颜色
- void setPieColorStart(const QColor &pieColorStart);
- void setPieColorMid(const QColor &pieColorMid);
- void setPieColorEnd(const QColor &pieColorEnd);
- //设置覆盖圆背景颜色
- void setCoverCircleColor(const QColor &coverCircleColor);
- //设置刻度尺颜色
- void setScaleColor(const QColor &scaleColor);
- //设置指针颜色
- void setPointerColor(const QColor &pointerColor);
- //设置中心圆颜色
- void setCenterCircleColor(const QColor ¢erCircleColor);
- //设置文本颜色
- void setTextColor(const QColor &textColor);
- //设置是否显示遮罩层
- void setShowOverlay(bool showOverlay);
- //设置遮罩层颜色
- void setOverlayColor(const QColor &overlayColor);
- //设置饼图样式
- void setPieStyle(const PieStyle &pieStyle);
- //设置指针样式
- void setPointerStyle(const PointerStyle &pointerStyle);
- Q_SIGNALS:
- void valueChanged(int value);
- };
- #endif //GAUGECAR_H
复制代码 核心代码
- void GaugeCar::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);
- //绘制外圆
- drawOuterCircle(&painter);
- //绘制内圆
- drawInnerCircle(&painter);
- //绘制饼圆
- drawColorPie(&painter);
- //绘制覆盖圆 用以遮住饼圆多余部分
- drawCoverCircle(&painter);
- //绘制刻度线
- drawScale(&painter);
- //绘制刻度值
- drawScaleNum(&painter);
- //根据指示器形状绘制指示器
- if (pointerStyle == PointerStyle_Circle) {
- drawPointerCircle(&painter);
- } else if (pointerStyle == PointerStyle_Indicator) {
- drawPointerIndicator(&painter);
- } else if (pointerStyle == PointerStyle_IndicatorR) {
- drawPointerIndicatorR(&painter);
- } else if (pointerStyle == PointerStyle_Triangle) {
- drawPointerTriangle(&painter);
- }
- //绘制指针中心圆外边框
- drawRoundCircle(&painter);
- //绘制指针中心圆
- drawCenterCircle(&painter);
- //绘制当前值
- drawValue(&painter);
- //绘制遮罩层
- drawOverlay(&painter);
- }
- void GaugeCar::drawOuterCircle(QPainter *painter)
- {
- int radius = 99;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(outerCircleColor);
- painter->drawEllipse(-radius, -radius, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawInnerCircle(QPainter *painter)
- {
- int radius = 90;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(innerCircleColor);
- painter->drawEllipse(-radius, -radius, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawColorPie(QPainter *painter)
- {
- int radius = 60;
- painter->save();
- painter->setPen(Qt::NoPen);
- QRectF rect(-radius, -radius, radius * 2, radius * 2);
- if (pieStyle == PieStyle_Three) {
- //计算总范围角度,根据占比例自动计算三色圆环范围角度
- //可以更改比例
- double angleAll = 360.0 - startAngle - endAngle;
- double angleStart = angleAll * 0.7;
- double angleMid = angleAll * 0.15;
- double angleEnd = angleAll * 0.15;
- //增加偏移量使得看起来没有脱节
- int offset = 3;
- //绘制开始饼圆
- painter->setBrush(pieColorStart);
- painter->drawPie(rect, (270 - startAngle - angleStart) * 16, angleStart * 16);
- //绘制中间饼圆
- painter->setBrush(pieColorMid);
- painter->drawPie(rect, (270 - startAngle - angleStart - angleMid) * 16 + offset, angleMid * 16);
- //绘制结束饼圆
- painter->setBrush(pieColorEnd);
- painter->drawPie(rect, (270 - startAngle - angleStart - angleMid - angleEnd) * 16 + offset * 2, angleEnd * 16);
- } else if (pieStyle == PieStyle_Current) {
- //计算总范围角度,当前值范围角度,剩余值范围角度
- double angleAll = 360.0 - startAngle - endAngle;
- double angleCurrent = angleAll * ((currentValue - minValue) / (maxValue - minValue));
- double angleOther = angleAll - angleCurrent;
- //绘制当前值饼圆
- painter->setBrush(pieColorStart);
- painter->drawPie(rect, (270 - startAngle - angleCurrent) * 16, angleCurrent * 16);
- //绘制剩余值饼圆
- painter->setBrush(pieColorEnd);
- painter->drawPie(rect, (270 - startAngle - angleCurrent - angleOther) * 16, angleOther * 16);
- }
- painter->restore();
- }
- void GaugeCar::drawCoverCircle(QPainter *painter)
- {
- int radius = 50;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(coverCircleColor);
- painter->drawEllipse(-radius, -radius, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawScale(QPainter *painter)
- {
- int radius = 72;
- painter->save();
- painter->rotate(startAngle);
- int steps = (scaleMajor * scaleMinor);
- double angleStep = (360.0 - startAngle - endAngle) / steps;
- QPen pen;
- pen.setColor(scaleColor);
- pen.setCapStyle(Qt::RoundCap);
- for (int i = 0; i <= steps; i++) {
- if (i % scaleMinor == 0) {
- pen.setWidthF(1.5);
- painter->setPen(pen);
- painter->drawLine(0, radius - 10, 0, radius);
- } else {
- pen.setWidthF(0.5);
- painter->setPen(pen);
- painter->drawLine(0, radius - 5, 0, radius);
- }
- painter->rotate(angleStep);
- }
- painter->restore();
- }
- void GaugeCar::drawScaleNum(QPainter *painter)
- {
- int radius = 82;
- painter->save();
- painter->setPen(scaleColor);
- double startRad = (360 - startAngle - 90) * (M_PI / 180);
- double deltaRad = (360 - startAngle - endAngle) * (M_PI / 180) / scaleMajor;
- for (int i = 0; i <= scaleMajor; i++) {
- double sina = qSin(startRad - i * deltaRad);
- double cosa = qCos(startRad - i * deltaRad);
- double value = 1.0 * i * ((maxValue - minValue) / scaleMajor) + minValue;
- QString strValue = QString("%1").arg((double)value, 0, 'f', precision);
- double textWidth = fontMetrics().width(strValue);
- double textHeight = fontMetrics().height();
- int x = radius * cosa - textWidth / 2;
- int y = -radius * sina + textHeight / 4;
- painter->drawText(x, y, strValue);
- }
- painter->restore();
- }
- void GaugeCar::drawPointerCircle(QPainter *painter)
- {
- int radius = 6;
- int offset = 30;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(pointerColor);
- painter->rotate(startAngle);
- double degRotate = (360.0 - startAngle - endAngle) / (maxValue - minValue) * (currentValue - minValue);
- painter->rotate(degRotate);
- painter->drawEllipse(-radius, radius + offset, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawPointerIndicator(QPainter *painter)
- {
- int radius = 75;
- painter->save();
- painter->setOpacity(0.8);
- painter->setPen(Qt::NoPen);
- painter->setBrush(pointerColor);
- QPolygon pts;
- pts.setPoints(3, -5, 0, 5, 0, 0, radius);
- painter->rotate(startAngle);
- double degRotate = (360.0 - startAngle - endAngle) / (maxValue - minValue) * (currentValue - minValue);
- painter->rotate(degRotate);
- painter->drawConvexPolygon(pts);
- painter->restore();
- }
- void GaugeCar::drawPointerIndicatorR(QPainter *painter)
- {
- int radius = 75;
- painter->save();
- painter->setOpacity(1.0);
- QPen pen;
- pen.setWidth(1);
- pen.setColor(pointerColor);
- painter->setPen(pen);
- painter->setBrush(pointerColor);
- QPolygon pts;
- pts.setPoints(3, -5, 0, 5, 0, 0, radius);
- painter->rotate(startAngle);
- double degRotate = (360.0 - startAngle - endAngle) / (maxValue - minValue) * (currentValue - minValue);
- painter->rotate(degRotate);
- painter->drawConvexPolygon(pts);
- //增加绘制圆角直线,与之前三角形重叠,形成圆角指针
- pen.setCapStyle(Qt::RoundCap);
- pen.setWidthF(4);
- painter->setPen(pen);
- painter->drawLine(0, 0, 0, radius);
- painter->restore();
- }
- void GaugeCar::drawPointerTriangle(QPainter *painter)
- {
- int radius = 10;
- int offset = 38;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(pointerColor);
- QPolygon pts;
- pts.setPoints(3, -5, 0 + offset, 5, 0 + offset, 0, radius + offset);
- painter->rotate(startAngle);
- double degRotate = (360.0 - startAngle - endAngle) / (maxValue - minValue) * (currentValue - minValue);
- painter->rotate(degRotate);
- painter->drawConvexPolygon(pts);
- painter->restore();
- }
- void GaugeCar::drawRoundCircle(QPainter *painter)
- {
- int radius = 18;
- painter->save();
- painter->setOpacity(0.8);
- painter->setPen(Qt::NoPen);
- painter->setBrush(pointerColor);
- painter->drawEllipse(-radius, -radius, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawCenterCircle(QPainter *painter)
- {
- int radius = 15;
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(centerCircleColor);
- painter->drawEllipse(-radius, -radius, radius * 2, radius * 2);
- painter->restore();
- }
- void GaugeCar::drawValue(QPainter *painter)
- {
- int radius = 100;
- painter->save();
- painter->setPen(textColor);
- QFont font;
- font.setPixelSize(18);
- painter->setFont(font);
- QRectF textRect(-radius, -radius, radius * 2, radius * 2);
- QString strValue = QString("%1").arg((double)currentValue, 0, 'f', precision);
- painter->drawText(textRect, Qt::AlignCenter, strValue);
- painter->restore();
- }
- void GaugeCar::drawOverlay(QPainter *painter)
- {
- if (!showOverlay) {
- return;
- }
- int radius = 90;
- painter->save();
- painter->setPen(Qt::NoPen);
- QPainterPath smallCircle;
- QPainterPath bigCircle;
- radius -= 1;
- smallCircle.addEllipse(-radius, -radius, radius * 2, radius * 2);
- radius *= 2;
- bigCircle.addEllipse(-radius, -radius + 140, radius * 2, radius * 2);
- //高光的形状为小圆扣掉大圆的部分
- QPainterPath highlight = smallCircle - bigCircle;
- QLinearGradient linearGradient(0, -radius / 2, 0, 0);
- overlayColor.setAlpha(100);
- linearGradient.setColorAt(0.0, overlayColor);
- overlayColor.setAlpha(30);
- linearGradient.setColorAt(1.0, overlayColor);
- painter->setBrush(linearGradient);
- painter->rotate(-20);
- painter->drawPath(highlight);
- painter->restore();
- }
复制代码 控件介绍
- 超过130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,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。
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- 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。
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