Qt 实现 axidraw 仿真

#include "graphwidget.h"

#include <QGraphicsScene>
#include <QRectF>
#include <QPainterPath>
#include <QtCore/qmath.h>
#include "base.h"


GraphWidget::GraphWidget()
{
    //设置更新时间,(如果时间太长,也就是更新太慢，当speed太小时会导致更新比鼠标运动还要慢，出错)、
    timerId = startTimer(1000 / 80.0);//设置更新的时间间隔 FRECUENCY = 100

    QGraphicsScene *scene = new QGraphicsScene(this);
    scene->setItemIndexMethod(QGraphicsScene::NoIndex);
     scene->setSceneRect(-300, -150, 600, 600);
      setMinimumSize(800, 800);
    setScene(scene);//
    setCacheMode(CacheBackground);
    setViewportUpdateMode(BoundingRectViewportUpdate);
    setRenderHint(QPainter::Antialiasing);
    setTransformationAnchor(AnchorUnderMouse);
    setResizeAnchor(AnchorViewCenter);
//新增加baseLeft
    baseLeft =new base(this);
    scene->addItem(baseLeft);
    baseLeft->setPos(-300,0);

    QGraphicsRectItem  * baserect = new QGraphicsRectItem(-40,-40,80,80);
   baserect->setPen(QPen(Qt::black));
   baserect->setPos(-300,0);
   scene->addItem(baserect);

   QGraphicsEllipseItem  * baseRound = new QGraphicsEllipseItem(-30,-30,60,60);
   baseRound->setPen(QPen(Qt::black));
   baseRound->setPos(-300,0);
   scene->addItem(baseRound);

//新增加baseRight
   baseRight =new base(this);
   scene->addItem(baseRight);
   baseRight->setPos(300,0);

   QGraphicsRectItem  * baserectbaseRight = new QGraphicsRectItem(-40,-40,80,80);
  baserectbaseRight->setPen(QPen(Qt::black));
  baserectbaseRight->setPos(300,0);
  scene->addItem(baserectbaseRight);

  QGraphicsEllipseItem  * baseRoundbaseRight = new QGraphicsEllipseItem(-30,-30,60,60);
  baseRoundbaseRight->setPen(QPen(Qt::black));
  baseRoundbaseRight->setPos(300,0);
  scene->addItem(baseRoundbaseRight);

//新增加centerbase
    centerbase =new  Centerbase(this);
    scene->addItem(centerbase);
    centerbase->setPos(-0,0);

//新增加underbase
    underbase =new  Underbase(this);
    scene->addItem(underbase);
    underbase->setPos(-0,0);

//新增加线条
    for(int i=0;i<8;i++)
    {
        lines[i] = new QGraphicsRectItem();
        lines[i]->setPen(QPen(Qt::black));
        lines[i]->setPos(0,0);
    }
    SetLinesPos(20,20);
    for(int n=0;n<8;n++)
    {
        scene->addItem(lines[n]);
    }
Drawitems(0,0);

//新增加轨迹
QGraphicsRectItem  * baserect2 = new QGraphicsRectItem(-100,0,200,160);
baserect2->setPen(QPen(Qt::blue));
baserect2->setPos(-0,380);
scene->addItem(baserect2);

QGraphicsEllipseItem  * baseRound2 = new QGraphicsEllipseItem(-40*2,0,80*2,80*2);
baseRound2->setPen(QPen(Qt::blue));
baseRound2->setPos(-0,380);
scene->addItem(baseRound2);


scale(qreal(0.8), qreal(0.8));
}
//线条平移距离，相对最初位置
void GraphWidget::SetLinesPos(qreal x,qreal  y)
{
    lines[0]->setRect(-300,-30,300-60+x,2);
    lines[1]->setRect(-300,30,300-60+x,2);
    lines[2]->setRect(60+x,-30,300-60-x,2);
    lines[3]->setRect(60+x,30,300-60-x,2);
    lines[4]->setRect(-30+x,-300-y,2,300-60+y);
    lines[5]->setRect(30+x,-300-y,2,300-60+y);
    lines[6]->setRect(-30+x,60,2,300-60-y);
    lines[7]->setRect(30+x,60,2,300-60-y);
}
void GraphWidget::Drawitems(qreal x,qreal y)
{
    centerbase->setPos(x,0);
    underbase->setPos(x,-y);
    SetLinesPos(x,y);
}
void GraphWidget::timerEvent(QTimerEvent *event)
{
    Q_UNUSED(event);

    Drawitems(underbase->pos().x(),-underbase->pos().y());
    qreal x =underbase->pos().x();
    qreal y = -underbase->pos().y();

    qreal angle1= (x+y)/30.0;
    qreal angle2 = (x-y)/30.0;
    baseLeft->setRotation(angle1*180);
    baseRight->setRotation(angle2*180);

    static unsigned int num =0;
    static unsigned int status = 0;
    static unsigned int thresh =100;
    num++;
    if(num>thresh)
    {
         num = 0;
         status++;
    }
    if(status == 0)
    {
        underbase->moveBy(1,0);
    }

    if(status == 1)
    {thresh =80;
        underbase->moveBy(0,1);
    }
    if(status == 2)
    {
        underbase->moveBy(0,1);
    }
    if(status == 3)
    {thresh =100;
        underbase->moveBy(-1,0);
    }
    if(status == 4)
    {
        underbase->moveBy(-1,0);
    }
    if(status == 5)
    {thresh =80;
        underbase->moveBy(0,-1);
    }
    if(status == 6)
    {
        underbase->moveBy(0,-1);
    }
    if(status == 7)
    {thresh =100;
        underbase->moveBy(1,0);
    }
    if(status == 8)
    {thresh = 2*3.141592653*80;
        underbase->moveBy(qCos(2*3.141592653*num*1.0/thresh),qSin(2*3.141592653*num*1.0/thresh));
    }

}

 1 #include <QApplication>
 2 #include "mainwindow.h"
 3 #include "graphwidget.h"
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     QApplication a(argc, argv);
 8     GraphWidget w;
 9     w.show();
10 
11     return a.exec();
12 }

 1 #include <QGraphicsScene>
 2 #include <QGraphicsSceneMouseEvent>
 3 #include <QPainter>
 4 #include <QStyleOption>
 5 
 6 #include "underbase.h"
 7 #include "graphwidget.h"
 8 
 9 #include <QtCore/qmath.h>
10 #include  <qDebug>
11 
12 Underbase::Underbase(GraphWidget *graphWidget) : graph(graphWidget)
13 {
14     setFlag(ItemIsMovable);
15             setCacheMode(DeviceCoordinateCache);
16             setZValue(1);
17 }
18 
19 QRectF Underbase::boundingRect() const
20 {
21     return QRectF(-110,-300,220,380+300);
22 }
23 
24 QPainterPath Underbase::shape() const
25 {
26     QPainterPath path;
27     path.addRect(-110,-300,220,380+300);
28     return path;
29 
30 
31 }
32 
33 void Underbase::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
34 {
35 
36 //    painter->setPen(Qt::black);
37 //    //painter->setBrush(Qt::red);
38 //    painter->drawLine(0,0,30,0);
39 //painter->drawRect(-100,-100,200,200);
40 // painter->drawEllipse(-30-60, -30-60, 60, 60);
41 // painter->drawEllipse(-30-60, -30+60, 60, 60);
42 // painter->drawEllipse(-30+60, -30-60, 60, 60);
43 // painter->drawEllipse(-30+60, -30+60, 60, 60);
44 
45 
46  painter->setPen(Qt::black);
47  //painter->setBrush(Qt::red);
48 //    painter->drawLine(0,0,30,0);
49 painter->drawRect(-110,-300,220,360+300);
50 painter->drawRect(-0,+360,2,20);
51 painter->drawEllipse(-0-30, 300-30, 60, 60);
52 painter->setBrush(Qt::black);
53 painter->drawRect(-110,-300,220,5);
54 }