Qt绘制雷达表盘

#include "SkyplotWidget.h" #include <QGuiApplication> #include <QtGui> #include <stdlib.h> #include <QDebug> #include <QtMath> #include <QString> SkyplotWidget::SkyplotWidget(QWidget *parent) : QWidget(parent) , flash( false ) , p_marginScale( 0.78 ) , p_satScale( 0.03 ) , p_fontScale( 0.02 ) , p_gridColor( QColor( 150, 150, 150, 255 ) ) , p_gridTextColor( QColor( 210, 210,210)) , p_gridWidth( 3 ) , p_ellipses( 3 ) , p_crosses( 3 ) , p_textMargin( 10 ) , p_flashIntervall( 500 ) , p_withGridLabels( true ) , p_antialiased( true ) , m_pieRotate(0) { flashTimer.setInterval( p_flashIntervall ); connect( &flashTimer, SIGNAL( timeout() ), this, SLOT( change_flash() ) ); flashTimer.start( p_flashIntervall ); connect(&m_PieSpeed,SIGNAL(timeout()),this,SLOT(pie_speed())); m_PieSpeed.start(50); } void SkyplotWidget::change_flash( void ) { flash = !flash; this->update(); } void SkyplotWidget::pie_speed( void ) { m_pieRotate -= 10; this->update(); } void SkyplotWidget::paintEvent(QPaintEvent *) { QSize widgetSize(this->size()); QPalette p = palette(); QPainter *painter = new QPainter(this); float topMargin ; float leftMargin; float size; float satelliteSize; float fontSize; float availableWidth = widgetSize.width (); float availableHeight = widgetSize.height(); if( availableHeight > availableWidth ) { size = widgetSize.width() * p_marginScale; topMargin = ( widgetSize.width() - widgetSize.width() * p_marginScale + widgetSize.height() - widgetSize.width() ) / 2.0; leftMargin = ( widgetSize.width() - widgetSize.width() * p_marginScale ) / 2.0; } else { size = widgetSize.height() * p_marginScale; leftMargin = ( widgetSize.height() - widgetSize.height() * p_marginScale + widgetSize.width() - widgetSize.height()) / 2.0; topMargin = ( widgetSize.height() - widgetSize.height() * p_marginScale ) / 2.0; } satelliteSize = size * p_satScale; painter->setRenderHint(QPainter::Antialiasing, p_antialiased); painter->translate( leftMargin, topMargin ); //重新设置坐标原点 fontSize = size * p_fontScale; painter->setFont(QFont( "Arial", static_cast< int >(fontSize))); //圆圈 for(int i=0; i <= p_ellipses; i++) { float radius = size / 2.0 - i * ( size / ( 2.0 * p_ellipses )); painter->setPen( QPen( p_gridColor, p_gridWidth ) ); painter->drawEllipse(QPoint( size/2.0, size/2.0 ), static_cast< int >( radius ), static_cast< int >(radius)); if(p_withGridLabels) { painter->setPen( QPen( p_gridTextColor, p_gridWidth -2.5 ) ); double tmp = ((p_ellipses - i) * (mMonitorScope / p_ellipses)); QString distance = QString::number(((p_ellipses - i) * (mMonitorScope / p_ellipses)) ,10 , 2); painter->drawText(QPoint(size/2.0 + p_textMargin, size/2.0 - (radius + p_textMargin)), QString("%1 km").arg(distance)); //距离刻度 } } //十字架 for(int i=0; i < p_crosses; i++) { QLineF line1,line2; float angle = (static_cast<float>(i) * 90.0) / (static_cast<float>(p_crosses)); line1.setP1( QPoint( size/2.0, size/2.0 ) ); line1.setLength( size/2.0 ); QRectF textRect(0, 0, 4.0 * fontSize, fontSize + 2.0); for(int c = 0; c < 4; c++) { line1.setAngle(angle + c*90.0 + 90.0); painter->setPen(QPen(p_gridColor, p_gridWidth)); painter->drawLine(line1); if( p_withGridLabels ) { painter->setPen(QPen( p_gridTextColor, p_gridWidth)); line2 = QLineF(line1); line2.setLength(size/2.0 + 2.0 * fontSize); textRect.moveCenter(line2.p2()); if(i > 0) painter->drawText( textRect, Qt::AlignCenter, QString("%1").arg((int)(360 - (c*90 ) - angle) , 3 , 10 , QChar('0'))); else { if(c == 0) { painter->drawText( textRect, Qt::AlignCenter,QString("000")); } else if(c == 1) { painter->drawText( textRect, Qt::AlignCenter, QString("270")); } else if(c == 2) { painter->drawText( textRect, Qt::AlignCenter, QString("180")); } else if(c == 3) { painter->drawText( textRect, Qt::AlignCenter, QString("090")); } } } } } QBrush innerBrush = QBrush( Qt::SolidPattern ); QBrush outerBrush = QBrush( ); //卫星 foreach( auto s, satellites ) { //------w---设置每一个卫星的大小 satelliteSize = size * s.rsize; // skip invisible satellites if( s.state & SatelliteState::Invisible || // the invisible flag is set ( !( s.state & SatelliteState::Visible ) & // neither visible nor half-visible !( s.state & SatelliteState::HalfVisible ) ) || ( s.state & SatelliteState::Flashing && flash ) // flashing flag is set and flash is active ) continue; QRectF labelRect( 0, 0, s.label.length() * satelliteSize, satelliteSize+2 ); double nmdX = 0,nmdY = 0; //卫星的X轴坐标,卫星的Y轴坐标 calculatePos(s.az , s.distance ,nmdX, nmdY); QPoint satPos(size/2.0 + size*(nmdX/mMonitorScope) * 0.5,size/2.0 + size*(nmdY/mMonitorScope) * 0.5); // define the color's alpha value (0.3 or 1.0) QColor innerColor = s.innerColor; QColor outerColor = s.outerColor; QColor fontColor = s.fontColor; if( s.state & SatelliteState::Visible ) { innerColor.setAlphaF( 1.0 ); outerColor.setAlphaF( 1.0 ); fontColor.setAlphaF( 1.0 ); } else { innerColor.setAlphaF( 0.3 ); outerColor.setAlphaF( 0.3 ); fontColor.setAlphaF( 0.3 ); } // paint the inner circle innerBrush.setColor( innerColor ); painter->setBrush( innerBrush ); if( s.state & SatelliteState::Marked ) painter->setPen( QPen( outerColor, satelliteSize/4 ) ); else painter->setPen( QPen( p_gridColor, 0 ) ); painter->drawEllipse( satPos, static_cast< int >( satelliteSize ), static_cast< int >( satelliteSize ) ); // write the text painter->setPen( QPen( fontColor, 2 ) ); painter->setFont( QFont( "Arial", static_cast< int >( satelliteSize ), QFont::Bold ) ); labelRect.moveCenter( satPos ); painter->drawText( labelRect, Qt::AlignCenter, s.label ); } foreach (auto l, indicatrix) { if( l.lineState & SatelliteState::Invisible || // the invisible flag is set ( !( l.lineState & SatelliteState::Visible ) & // neither visible nor half-visible !( l.lineState & SatelliteState::HalfVisible ) ) || ( l.lineState & SatelliteState::Flashing && flash ) // flashing flag is set and flash is active ) continue; QPoint spoint ( l.point1.rx() * size / 100 + size/2, l.point1.ry() * size/100 + size/2); QPoint epoint ( l.point2.rx() * size / 100 + size/2, l.point2.ry() * size/100 + size/2); painter->setPen(QPen(l.lineColor,1.5,Qt::DashDotLine,Qt::RoundCap)); painter->drawLine(spoint,epoint); } //余晖扫描 // int len = m_drawArea.width(); qreal x = size/2.0 + (qreal)size/2 * c