基于QT 设计实现的车辆远近光灯控件.

1.设计说明

基于QWidget设计实现,通过重构QPaintEvent事件,绘制出的车辆远近光灯控件,可通过QWidget提升方法,应用于项目中.

2.核心代码:

#ifndef QCUSTOMHIGHLOWBEAM_H
#define QCUSTOMHIGHLOWBEAM_H#include <QWidget>
#include <QPainter>/*** @brief Feature:* Support* Support* Support* Support*/#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,0,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endifclass QDESIGNER_WIDGET_EXPORT QCustomMobileSignal : public QWidget
#else
class QCustomHighLowBeam : public QWidget
#endif
{Q_OBJECT
//    Q_PROPERTY()
public:explicit QCustomHighLowBeam(QWidget *parent = nullptr);~QCustomHighLowBeam();protected:QSize sizeHint()                const;QSize minimumSizeHint()         const;void paintEvent(QPaintEvent *);void resizeEvent(QResizeEvent *);void drawBackground(QPainter *painter);void drawHighBeam(QPainter *painter);void drawLowBeam(QPainter *painter);
private:QColor m_active_color_;QColor m_unactive_color_;// false:unactive true:activebool m_highbeam_active_{false};bool m_lowbeam_active_{false};QColor m_background_color_;
signals:public slots:void setHighBeamState(bool value);void setLowBeamState(bool value);
};#endif // QCUSTOMHIGHLOWBEAM_H

#include "qcustomhighlowbeam.h"QCustomHighLowBeam::QCustomHighLowBeam(QWidget *parent) : QWidget(parent)
{m_background_color_ = QColor(55,107,154, 30);m_active_color_ = Qt::yellow;m_unactive_color_ = Qt::gray;}QCustomHighLowBeam::~QCustomHighLowBeam()
{}void QCustomHighLowBeam::resizeEvent(QResizeEvent *)
{this->repaint();
}QSize QCustomHighLowBeam::sizeHint() const
{return QSize(150, 150);
}QSize QCustomHighLowBeam::minimumSizeHint() const
{return QSize(30, 30);
}void QCustomHighLowBeam::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);drawBackground(&painter);drawHighBeam(&painter);drawLowBeam(&painter);//    drawTitle(&painter);//    drawTimeCost(&painter);//    drawSystemTime(&painter);
}void QCustomHighLowBeam::drawBackground(QPainter *painter)
{int width = this->width();int height = this->height();int side = qMin(width, height);painter->save();painter->setBrush(m_background_color_);painter->drawRect(-width, -height, width * 2, height * 2);painter->restore();
}void QCustomHighLowBeam::drawHighBeam(QPainter *painter)
{int width = this->width();int height = this->height();int side = qMin(width, height);QLine lines[] = {{-25, -20, -5, -20},{-25, -10, -5, -10},{-25,   0, -5,   0},{-25,  10, -5,  10},{-25,  20, -5,  20},{-25,  20, -5,  20},{  2, -30,  2,  30}};painter->save();if (m_highbeam_active_){painter->setPen(QPen(m_active_color_, 4));} else {painter->setPen(QPen(m_unactive_color_, 4));}painter->drawLines(lines,  (sizeof(lines)/sizeof (lines[0])));QRectF rectangle(-50.0, -30.0, 105.0, 60.0);int startAngle = 90 * 16;int spanAngle = -180 * 16;painter->drawArc(rectangle, startAngle, spanAngle);painter->restore();
}void QCustomHighLowBeam::drawLowBeam(QPainter *painter)
{int width = this->width();int height = this->height();int side = qMin(width, height);int offset = 100;QLine lines[] = {{-25+offset, -15, -5+offset, -25},{-25+offset,  -5, -5+offset, -15},{-25+offset,   5, -5+offset,  -5},{-25+offset,  15, -5+offset,   5},{-25+offset,  25, -5+offset,  15},{-25+offset,  35, -5+offset,  25},{  2+offset, -30,  2+offset,  30}};painter->save();if (m_lowbeam_active_){painter->setPen(QPen(m_active_color_, 4));} else {painter->setPen(QPen(m_unactive_color_, 4));}painter->drawLines(lines,  (sizeof(lines)/sizeof (lines[0])));QRectF rectangle(-50.0+offset, -30.0, 105.0, 60.0);int startAngle = 90 * 16;int spanAngle = -180 * 16;painter->drawArc(rectangle, startAngle, spanAngle);painter->restore();
}void QCustomHighLowBeam::setHighBeamState(bool value)
{if (this->m_highbeam_active_ != value){this->m_highbeam_active_ = value;this->update();}
}void QCustomHighLowBeam::setLowBeamState(bool value)
{if (this->m_lowbeam_active_ != value){this->m_lowbeam_active_ = value;this->update();}
}

3.效果示意图

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QT自定义控件之车辆远近光灯

1.设计说明

2.核心代码:

3.效果示意图

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