qt双向滑块—横向和纵向

#include "TwoWaySliderControl.h" #include <QDebug> #include <QPainter> #include <QFont> #include <QPen> #include <QMouseEvent> CTwoWaySliderControl::CTwoWaySliderControl( QWidget* parent ) : QWidget(parent) { this->setMouseTracking(true); m_iHeight =0; m_iWidth =0; m_iMinValue =0; m_iMaxValue =100; m_iCurMinValue =0; m_iCurMaxValue =100; selectType = 0; leftValue = 0; rightValue = 0; } CTwoWaySliderControl::~CTwoWaySliderControl(void) { } void CTwoWaySliderControl::paintEvent( QPaintEvent* p) { QPainter painter(this); QPen pen; pen.setColor(QColor(0,0,0)); pen.setWidth(1); painter.setPen(pen); painter.drawRect(2,10,m_iWidth-4,m_iHeight-20); float CurMin = 1.0*m_iCurMinValue/(m_iMaxValue - m_iMinValue) * (m_iWidth -2); float CurMax = 1.0*m_iCurMaxValue/(m_iMaxValue - m_iMinValue) * (m_iWidth -2); painter.fillRect(2+CurMin+15,10+1,CurMax-CurMin-15+1,m_iHeight-20-1,Qt::gray); painter.fillRect(2+CurMin,2,15,m_iHeight-4,Qt::lightGray); painter.fillRect(2+CurMax-15,2,15,m_iHeight-4,Qt::lightGray); curMinValueStartPoint.setX(2+CurMin); curMinValueStartPoint.setY(2); curMaxValueStartPoint.setX(2+CurMax-15); curMaxValueStartPoint.setY(2); painter.end(); } void CTwoWaySliderControl::mousePressEvent( QMouseEvent *e) { setCursor(Qt::PointingHandCursor); QPoint Lastpoint = e->pos(); bool ret = CheckSelect(Lastpoint,curMinValueStartPoint,15,m_iHeight-4); if(ret == true) { selectType = 1; return; } ret = CheckSelect(Lastpoint,curMaxValueStartPoint,15,m_iHeight-4); if(ret == true) { selectType = 2; return; } QPoint tem = curMinValueStartPoint; tem.setX(curMinValueStartPoint.x()+15); ret = CheckSelect(Lastpoint,tem,curMaxValueStartPoint.x()-curMinValueStartPoint.x()-15,m_iHeight-4); if(ret == true) { selectType = 3; int moveSize = Lastpoint.x(); int temValue = 1.0* moveSize/(m_iWidth -2) * (m_iMaxValue - m_iMinValue); leftValue = temValue - m_iCurMinValue; rightValue = m_iCurMaxValue - temValue; } } void CTwoWaySliderControl::mouseMoveEvent( QMouseEvent *e) { if(selectType == 0) { return; } setCursor(Qt::PointingHandCursor); QPoint curPoint = e->pos(); int moveSize = curPoint.x(); int temValue = 0; if(selectType == 1) { temValue = 1.0* (moveSize-7)/(m_iWidth -2) * (m_iMaxValue - m_iMinValue); setCurMinValue(temValue); } if(selectType == 2) { temValue = 1.0* (moveSize+7)/(m_iWidth -2) * (m_iMaxValue - m_iMinValue); setCurMaxValue(temValue); } if(selectType == 3) { temValue = 1.0* moveSize/(m_iWidth -2) * (m_iMaxValue - m_iMinValue); if( m_iMinValue <= temValue - leftValue && temValue - leftValue <= temValue + rightValue && temValue + rightValue <= m_iMaxValue ) { setCurMinValue(temValue - leftValue); setCurMaxValue(temValue + rightValue); } } emit sliderMoved(m_iCurMinValue,m_iCurMaxValue); } void CTwoWaySliderControl::mouseReleaseEvent( QMouseEvent *e ) { setCursor(Qt::ArrowCursor); selectType = 0; } void CTwoWaySliderControl::resizeEvent( QResizeEvent *event ) { m_iHeight = this->height(); m_iWidth = this->width(); } bool CTwoWaySliderControl::setRange( int min,int max ) { if( min > max) { return false; } m_iMinValue = min; m_iMaxValue = max; m_iCurMinValue =min; m_iCurMaxValue =max; update(); emit rangeChanged(min,max); return true; } int CTwoWaySliderControl::MinValue() { return m_iMinValue; } int CTwoWaySliderControl::MaxValue() { return m_iMaxValue; } int CTwoWaySliderControl::CurMinValue() { return m_iCurMinValue; } int CTwoWaySliderControl::CurMaxValue() { return m_iCurMaxValue; } bool CTwoWaySliderControl::setCurMaxValue( int value ) { if(value < m_iCurMinValue || value > m_iMaxValue) { return false; } m_iCurMaxValue = value; update(); return true; } bool CTwoWaySliderControl::setCurMinValue( int value ) { if(value < m_iMinValue || value > m_iCurMaxValue) { return false; } m_iCurMinValue = value; update(); return true; } bool CTwoWaySliderControl::CheckSelect( QPoint curPoint,QPoint startPoint,int width,int height ) { if( startPoint.x() <= curPoint.x() && curPoint.x() <= startPoint.x()+width ) { if( startPoint.y() <= curPoint.y() && curPoint.y() <= startPoint.y()+height ) { return true; } } return false; }