chartView.zip

#include "chartViews.h" ChartViews::ChartViews(QQuickPaintedItem *parent) : QQuickPaintedItem(parent) { m_width = 0; leftBorder = 50; rightBorder = 10; bottomBorder = 40; topBorder = 10; xx = 0; A = 0; Rang = 100; decrease = 0; num = 0; connect(&timer,SIGNAL(timeout()),this,SLOT(xRangeChage())); timer.setInterval(500); timer.start(); } void ChartViews::paint(QPainter *painter) { painter->save(); QPen pen(m_Color,1); painter->setPen(pen); painter->setRenderHints(QPainter::Antialiasing, true); QFont font = painter->font(); font.setPointSizeF(15); painter->setFont(font); painter->drawText(m_width/2-70,40,m_name); painter->restore(); // painter->setPen(pen); painter->drawLine(leftBorder,topBorder,leftBorder,this->height() - bottomBorder); //画y尖 painter->drawLine(leftBorder-10, topBorder+10,leftBorder,topBorder); painter->drawLine(leftBorder+10, topBorder+10,leftBorder,topBorder); //y轴间隔 intervalY = (m_height - bottomBorder - topBorder - 40)/(double)m_yNum; for(int i = 0; i < m_yNum;i++) { int level = topBorder + 40+i*intervalY; painter->drawLine(leftBorder,level,leftBorder+5,level); double y = m_yRange/(double)m_yNum; y = (m_yNum-i)*y; QString text = QString::number(y, 'f', 1); painter->drawText(leftBorder-39,level+5,text); } //x轴 int bottom = m_height - bottomBorder; painter->drawLine(leftBorder,bottom,m_width-rightBorder,bottom); painter->drawLine(m_width-rightBorder-10,bottom+10,m_width-rightBorder,bottom); painter->drawLine(m_width-rightBorder-10,bottom-10,m_width-rightBorder,bottom); //修改x轴>的距离 40 ->60 intervalX = (m_width - rightBorder - leftBorder - 60)/(double)m_xNum; for(int i = A; i <= Rang-80; i++) { int level = leftBorder + i*intervalX - xx; painter->drawLine(level,m_height-bottomBorder,level,m_height-bottomBorder-5); double x = m_xRange/(double)m_xNum; x = (i)*x; QString text = QString::number(x, 'f', 0); painter->drawText(level-7,m_height-bottomBorder+15,text); } //原点 painter->translate(leftBorder,m_height-bottomBorder); QPen pens(Qt::yellow,1); painter->setPen(pens); painter->setRenderHints(QPainter::Antialiasing, true); //画线段 for(int i = 0; i < m_point.size()-1;i++) { //painter->drawLine(coordinate(m_point.at(i)),coordinate(m_point.at(i+1))); QPointF point = m_point.at(i); QPointF point1 = m_point.at(i+1); point.setX(point.x()-decrease+1); point1.setX(point1.x()-decrease+1); painter->drawLine(coordinate(point),coordinate(point1)); } } void ChartViews::xRangeChage() { xx = (intervalX/5.0)*decrease; num++; if((num)%5==2) { A ++; Rang++; } update(); decrease++; addData(num+99,rand()%100); if(m_point.size()>=102) { m_point.removeFirst(); } } QPointF ChartViews::coordinate(QPointF ponit) { QPointF pointF; pointF.setX(intervalX*(ponit.x()/(double)m_xRange)*m_xNum); pointF.setY(-intervalY*(ponit.y()/(double)m_yRange)*m_yNum); return pointF; } void ChartViews::addData(double tmpX, double tmpY) { QPointF point; point.setX(tmpX); point.setY(tmpY); m_point.append(point); update(); } int ChartViews::yNum() const { return m_yNum; } void ChartViews::setYNum(const int yNum) { m_yNum = yNum; } int ChartViews::xNum() const { return m_xNum; } void ChartViews::setXNum(const int xNum) { m_xNum = xNum; } QColor ChartViews::color() const { return m_Color; } void ChartViews::setColor(const QColor &color) { m_Color = color; } int ChartViews::width() const { return m_width; } void ChartViews::setWidth(const int width) { m_width = width; } int ChartViews::height() const { return m_height; } void ChartViews::setHeight(const int height) { m_height = height; } int ChartViews::yRange() const { return m_yRange; } void ChartViews::setYRange(const int yRange) { m_yRange = yRange; } int ChartViews::xRange() const { return m_xRange; } void ChartViews::setXRange(const int xRange) { m_xRange = xRange; } QString ChartViews::name() const { return m_name; } void ChartViews::setName(QString name) { m_name = name; }