324 lines
12 KiB
C++
324 lines
12 KiB
C++
#include "graphwindow.h"
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#include "ui_graphwindow.h"
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GraphWindow::GraphWindow(QWidget *parent) :
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QDialog(parent),
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ui(new Ui::GraphWindow)
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{
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ui->setupUi(this);
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setWindowTitle("LinkScope - Graph");
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ui->txt_graph->installEventFilter(this);
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updateCursor();
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//设定触发定时器
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trigTimer=new QTimer(this);
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trigTimer->setInterval(30); //30ms绘制一帧图像
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trigTimer->start();
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connect(trigTimer,SIGNAL(timeout()),this,SLOT(onTrig()));
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}
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GraphWindow::~GraphWindow()
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{
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delete trigTimer;
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delete ui;
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}
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//绘图事件，进行图像重绘
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void GraphWindow::paintGraph(QWidget *canvas)
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{
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//绘图部分在窗口上的位置
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float offsetx=ui->txt_graph->pos().x(),offsety=ui->txt_graph->pos().y();
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//绘图部分宽高
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float hei=ui->txt_graph->height(),wid=ui->txt_graph->width();
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float posx=0,posy=0;//绘图偏移
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QPainter painter(canvas); //画笔
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painter.setBrush(QBrush(QColor(Qt::white)));//填充背景
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painter.drawRect(posx,posy,wid,hei);
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//绘制标记线
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painter.setPen(QPen(QColor(184,184,184),2,Qt::DotLine));
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for(int i=1;i<VERT_DIV;i++)
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{
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float horiY=hei*i/VERT_DIV+posy;
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painter.drawLine(posx,horiY,posx+wid,horiY);
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}
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for(int i=1;i<HORI_DIV;i++)
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{
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float vertX=wid*i/HORI_DIV+posx;
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painter.drawLine(vertX,posy,vertX,posy+hei);
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}
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//计算采样点最大时间范围和需要显示的时间范围
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double totalTime=0;
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for(int varIndex=0;varIndex<varList->size();varIndex++)
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if(varList->at(varIndex).samples.size()>0 && varList->at(varIndex).samples.last().timestamp>totalTime*1000000)
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totalTime=varList->at(varIndex).samples.last().timestamp/1000000.0;
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double timeRange=ui->sb_hori_rsv->value()*HORI_DIV;
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if(dragging)//若正在拖拽则根据鼠标位移移动图像
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{
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double vertDist=(mousePos.y()-lastMousePos.y())*1.0/hei*ui->sb_vert_rsv->value()*VERT_DIV;
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ui->sb_vert_offset->setValue(ui->sb_vert_offset->value()-vertDist);
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double horiDist=(mousePos.x()-lastMousePos.x())*1.0/wid*timeRange*1000;
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ui->bar_hori->setValue(ui->bar_hori->value()-horiDist);
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lastMousePos=mousePos;
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}
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//设定水平拖动条范围
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if(totalTime>timeRange)
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ui->bar_hori->setMaximum(totalTime*1000-timeRange*1000);
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else
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ui->bar_hori->setMaximum(1);
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//若勾选实时更新则设定拖动条到末端
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if(ui->cb_update->checkState()==Qt::Checked)
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ui->bar_hori->setValue(ui->bar_hori->maximum());
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double startTime=ui->bar_hori->value()*1.0/ui->bar_hori->maximum()*(totalTime-timeRange);//需显示部分的开始时间
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double endTime=startTime+timeRange;//需显示部分的结束时间
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double valueRange=ui->sb_vert_rsv->value()*VERT_DIV;//界面能显示的值的范围
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double minValue=-valueRange/2-ui->sb_vert_offset->value();//界面能显示的最小值
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//依次绘制曲线
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for(int varIndex=0;varIndex<varList->size();varIndex++)
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{
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VarInfo &var=(*varList)[varIndex];
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if(!var.enableScope || var.samples.size()<2)//若不使能绘制或采样点太少则跳过
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continue;
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painter.setPen(QPen(var.lineColor,varIndex==chosenVarIndex?4:2,Qt::SolidLine));//设置笔刷（若是被选中的曲线则加粗）
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SamplePoint lastSamp=var.samples.at(0);//用于记录线段的上一个点
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for(int sampIndex=1;sampIndex<var.samples.size();sampIndex++)//依次连接采样点
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{
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SamplePoint thisSamp=var.samples.at(sampIndex);
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double lastTime=lastSamp.timestamp/1000000.0;
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double thisTime=thisSamp.timestamp/1000000.0;
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if(lastTime>startTime&&lastTime<endTime && thisTime>startTime&&thisTime<endTime && thisTime-lastTime<0.5)
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{
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QPoint lastPoint((lastTime-startTime)/timeRange*wid+posx,hei-(lastSamp.value-minValue)/valueRange*hei+posy);
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QPoint thisPoint((thisTime-startTime)/timeRange*wid+posx,hei-(thisSamp.value-minValue)/valueRange*hei+posy);
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if(!( (lastPoint.y()<posy && thisPoint.y()<posy) || (lastPoint.y()>posy+hei && thisPoint.y()>posy+hei) ))
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painter.drawLine(lastPoint,thisPoint);
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}
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lastSamp=thisSamp;
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}
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}
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if(looking)//若正在查看变量则绘制查看线
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{
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painter.setPen(QPen(QColor(184,184,184),3,Qt::SolidLine));
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painter.drawLine(mousePos.x()-offsetx,posy,mousePos.x()-offsetx,posy+hei);
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}
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//计算并显示选中变量的变量名、当前值、查看值
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if(chosenVarIndex>=0 && chosenVarIndex<varList->size() && varList->at(chosenVarIndex).samples.size()>=2)
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{
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const VarInfo *chosenVar=&varList->at(chosenVarIndex);
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ui->lab_name->setText("变量名:"+chosenVar->name);
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ui->lab_curval->setText(QString("当前值:%1").arg(chosenVar->samples.last().value));
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if(looking)//计算查看位置
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{
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double lookTime=(mousePos.x()-posx-offsetx)*1.0/wid*timeRange+startTime;
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for(int sampIndex=0;sampIndex<chosenVar->samples.size()-1;sampIndex++)//依次检查采样点找到时间戳与查看位置最接近的点
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{
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if(chosenVar->samples.at(sampIndex).timestamp/1000000.0<=lookTime&&
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chosenVar->samples.at(sampIndex+1).timestamp/1000000.0>=lookTime)
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{
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ui->lab_lookval->setText(QString("查看值:%1").arg(chosenVar->samples.at(sampIndex).value));
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break;
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}
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if(sampIndex==chosenVar->samples.size()-2)
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ui->lab_lookval->setText("");
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}
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}
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else
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{
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ui->lab_lookval->setText("");
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}
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}
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else
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{
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ui->lab_name->setText("");
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ui->lab_curval->setText("");
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ui->lab_lookval->setText("");
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}
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}
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//重写事件过滤器，用于触发绘图label的绘图事件
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bool GraphWindow::eventFilter(QObject *watched, QEvent *event)
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{
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if(watched==ui->txt_graph && event->type()==QEvent::Paint)
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{
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paintGraph(ui->txt_graph);
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return true;
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}
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return QDialog::eventFilter(watched,event);
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}
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//滚轮事件
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void GraphWindow::wheelEvent(QWheelEvent *event)
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{
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if(shiftFlag) //shift按下则竖直缩放
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{
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float dist=ui->sb_vert_rsv->value()*0.01; //最大/最小值增减量
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if(event->delta()>0)
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{
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ui->sb_vert_rsv->setValue(ui->sb_vert_rsv->value()-dist);
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}
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else if(event->delta()<0)
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{
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ui->sb_vert_rsv->setValue(ui->sb_vert_rsv->value()+dist);
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}
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}
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if(ctrlFlag) //ctrl按下则水平伸缩
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{
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float dist=ui->sb_hori_rsv->value()*0.01; //横向分辨率增减量
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int barDist=dist*1000*HORI_DIV/2;
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if(event->delta()>0)
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{
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if(ui->sb_hori_rsv->value()>0.001)
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{
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ui->sb_hori_rsv->setValue(ui->sb_hori_rsv->value()-dist);
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if(ui->bar_hori->value()<ui->bar_hori->maximum()-barDist)
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ui->bar_hori->setValue(ui->bar_hori->value()+barDist);
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}
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}
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if(event->delta()<0)
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{
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ui->sb_hori_rsv->setValue(ui->sb_hori_rsv->value()+dist);
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if(ui->bar_hori->value()>ui->bar_hori->minimum()+barDist)
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ui->bar_hori->setValue(ui->bar_hori->value()-barDist);
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}
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}
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if(!ctrlFlag && !shiftFlag && !altFlag) //无任何组合键按下则时间轴左右滚动
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{
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float dist=ui->sb_hori_rsv->value()*100; //水平拖动条位置增减量
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if(event->delta()>0 && ui->bar_hori->value()>0)
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{
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if(ui->bar_hori->value()>dist)
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ui->bar_hori->setValue(ui->bar_hori->value()-dist);
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else
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ui->bar_hori->setValue(0);
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}
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else if(event->delta()<0 && ui->bar_hori->value()<ui->bar_hori->maximum())
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{
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if(ui->bar_hori->maximum()-ui->bar_hori->value()>dist)
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ui->bar_hori->setValue(ui->bar_hori->value()+dist);
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else
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ui->bar_hori->setValue(ui->bar_hori->maximum());
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}
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}
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}
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//按键按下事件
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void GraphWindow::keyPressEvent(QKeyEvent *event)
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{
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//三种组合键按下时对应标记置true
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if(event->key()==Qt::Key_Control)
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ctrlFlag=true;
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else if(event->key()==Qt::Key_Shift)
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shiftFlag=true;
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else if(event->key()==Qt::Key_Alt)
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altFlag=true;
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updateCursor();
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}
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//按键松开事件
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void GraphWindow::keyReleaseEvent(QKeyEvent *event)
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{
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//三种组合键松开时对应标记置false
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if(event->key()==Qt::Key_Control)
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ctrlFlag=false;
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else if(event->key()==Qt::Key_Shift)
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shiftFlag=false;
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else if(event->key()==Qt::Key_Alt)
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altFlag=false;
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updateCursor();
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}
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//鼠标按下事件
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void GraphWindow::mousePressEvent(QMouseEvent *event)
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{
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if(event->button()==Qt::LeftButton) //如果左键按下则开启查看（ALT未按下）或拖拽（ALT按下）
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{
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if(altFlag)
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dragging=true;
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else
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looking=true;
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mousePos.setX(event->x()); //记录鼠标坐标
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mousePos.setY(event->y());
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lastMousePos=mousePos;
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}
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}
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//鼠标松开事件
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void GraphWindow::mouseReleaseEvent(QMouseEvent *event)
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{
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if(event->button()==Qt::LeftButton) //如果左键松开则关闭查看和拖拽
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looking=dragging=false;
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}
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//鼠标移动事件（仅按下时触发）
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void GraphWindow::mouseMoveEvent(QMouseEvent *event)
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{
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if(looking||dragging) //若在查看或拖拽状态则记录鼠标位置
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{
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mousePos.setX(event->x());
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mousePos.setY(event->y());
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}
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}
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//定时器槽函数，触发绘图
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void GraphWindow::onTrig()
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{
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ui->txt_graph->update();
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}
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//用于外部设置变量列表
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void GraphWindow::setVarList(QList<VarInfo> *list)
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{
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varList=list;
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}
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//用于外部设置选中的变量
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void GraphWindow::setChosenIndex(int varIndex)
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{
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chosenVarIndex=varIndex;
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}
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//点击按钮时弹出说明界面
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void GraphWindow::on_btn_help_clicked()
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{
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//弹出messagebox显示帮助信息
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QString str="设置说明\n"
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"水平分辨率：水平方向每两根标线间表示的秒数\n"
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"竖直分辨率：竖直方向每两根标线间表示的范围\n"
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"实时更新：始终显示时间轴末端，跟随采样值的更新而变化\n\n"
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"快捷操作\n"
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"1.无按键+滚轮：时间轴左右滚动\n"
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"2.Ctrl+滚轮：图像水平缩放\n"
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"3.Shift+滚轮：图像竖直缩放\n"
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"4.Alt+左键拖拽：移动图像\n\n"
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"查看操作\n"
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"按住鼠标左键并拖动可以查看所选变量曲线的值（主界面单击变量名可选中变量）";
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QMessageBox box;
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box.setWindowTitle("绘图界面说明");
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box.setText(str);
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box.exec();
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}
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//根据各标志更新光标形状
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void GraphWindow::updateCursor()
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{
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if(ctrlFlag&&shiftFlag)//ctrl和shift同时按下，水平竖直方向同步缩放，显示斜向缩放箭头
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ui->txt_graph->setCursor(Qt::SizeFDiagCursor);
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else if(ctrlFlag)//ctrl按下，水平方向缩放，显示横向箭头
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ui->txt_graph->setCursor(Qt::SizeHorCursor);
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else if(shiftFlag)//shift按下，纵向缩放，显示纵向箭头
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ui->txt_graph->setCursor(Qt::SizeVerCursor);
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else if(altFlag)//alt按下，可以拖拽图像，显示拖动光标
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ui->txt_graph->setCursor(Qt::SizeAllCursor);
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else //没有按键按下，显示十字光标
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ui->txt_graph->setCursor(Qt::CrossCursor);
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}
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