Table of Contents
1 renderings
2 Function description
3 key codes
1 Realize the addition, deletion and dynamic update of multiple coordinate systems
2 Coordinate system X-axis synchronization
3 Display cursor in multiple coordinate systems
4 Add curve function
5 Create a single X-axis and multiple Y-axis coordinate system
1 Rendering
2 Function Description
0 Three modes (1) Single X and single Y axis (2) Single X and multiple Y axes (3) Multiple X and multiple Y axes
1. Switching between single coordinate system and multiple coordinate systems is possible.
2 Click the checkbox of QTableWidget to control the number of coordinate systems and display the corresponding curve
3 Display cursor in multiple coordinate systems
4 Change the color of the curve
5 Coordinate system X-axis synchronization
6. Zoom in and out, move left and right, and move up and down the curve
3 key code
Some functions in the header file:
public:
int m_WaveIndex;
QCPMarginGroup *marginGroup;
QString currentFileName;
int model;
QVector<QCPAxisRect *>axisList;
SetYValueDialog mSetYValueDialog;
RecFile *pRecGlobal;
bool bCursorMoveShow;
QVector<QCPItemText *> vectorQCPItemText;
QCPAxisRect * rect;
void SetModelState(Model _model);
void UpdataAll();
void ModelSingleCoord();
void ModelXMulY_Coord();
void ModelMulCoord();
void ModelChange(int _model = 0);
void RemoveQCPAxisRectAll();
void SetVisbleQCPAxisRect();
void CreateQCPAxisRect();
void connectAllxAsix(bool on);
void CreateQCPAxisRect(int axis_num);
void UpdataViewTable();
void ClearViewTable();
void ReloadCustomPlot();
void loadFileTXTFile(QString fileName);
void ClearQCPItemText();
void dragEnterEvent(QDragEnterEvent *event) override; //Drag event
void dropEvent(QDropEvent *event) override; //Drag and release event
};
1 Realize the addition, deletion and dynamic update of multiple coordinate systems
void MainWindow::RemoveQCPAxisRectAll()
{
ui->customplot->clearGraphs();
for(int i = 0;i < axisList.count();i + + )
{
ui->customplot->plotLayout()->remove(axisList.at(i));
QCPAxisRect * rect = axisList.at(i);
rect = nullptr;
}
axisList.clear();
//My personal understanding here is to rearrange the layout after deleting elements.
//The number of elements will not change without execution
ui->customplot->plotLayout()->simplify();
qDebug()<<ui->customplot->plotLayout()->elementCount();
}
This function deletes all the coordinate axes in QVector
void MainWindow::CreateQCPAxisRect(int axis_num)
{
ui->customplot->plotLayout()->setMargins(QMargins(0, 10, 0, 0));
ui->customplot->plotLayout()->elementAt(0)->setMarginGroup(QCP::msLeft, marginGroup);
for(int i = 0;i < axis_num;i + + ){
QCPAxisRect *rect = new QCPAxisRect(ui->customplot);
rect->setMarginGroup(QCP::msLeft, marginGroup);
rect->setAutoMargins(QCP::MarginSide::msLeft | QCP::MarginSide::msRight);
rect->axis(QCPAxis::atBottom)->setRange(0,2000);
rect->setRangeDrag(Qt::Horizontal | Qt::Vertical); //Horizontal drag
rect->setRangeZoom(Qt::Horizontal | Qt::Vertical); //Horizontal scaling
if(i == axis_num - 1)
{
rect->setMargins(QMargins(0, 0, 0, 20));
}
if(!ui->customplot->plotLayout()->hasElement(i + 1,0))
ui->customplot->plotLayout()->addElement(i + 1,0,rect);
axisList.append(rect);
}
connectAllxAsix(true);
ui->customplot->plotLayout()->simplify();
}
This function creates multiple coordinate systems and adds them to the border group marginGroup to keep the Y axis consistent. Since there is a default coordinate system, here is i + 1
ui->customplot->plotLayout()->addElement(i + 1,0,rect);
2 Coordinate system X-axis synchronization
void MainWindow::connectAllxAsix(bool on)
{
for (int i = 0; i < axisList.count(); + + i) {
if(on){
connect(ui->customplot->axisRect()->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(i)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange )));
connect(axisList.at(i)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), ui->customplot->axisRect()->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange )));
}
else
{
disconnect(ui->customplot->axisRect()->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(i)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange )));
disconnect(axisList.at(i)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), ui->customplot->axisRect()->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange )));
}
for (int j = i + 1; j < axisList.count(); + + j) {
if(on)
{
connect(axisList.at(i)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(j)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange))) ;
connect(axisList.at(j)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(i)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange))) ;
}
else
{
disconnect(axisList.at(i)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(j)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange))) ;
disconnect(axisList.at(j)->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), axisList.at(i)->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange))) ;
}
}
}
}
This function connects signals and slots to achieve synchronization of the X axis
3 Display cursor in multiple coordinate systems
void MainWindow::mouseMoveEvent( QMouseEvent *event ) {
//return ;
if ( !ui->customplot->viewport().contains( event->pos() ) )
return;
if ( RubBand->isVisible() ) {
QPoint EndPoint = event->pos();
EndPoint.setY(EndPoint.y() + 58);
// EndPoint.setY( ui->customplot->height() );
RubBand->setGeometry( QRect( StartPoint, EndPoint ).normalized() );
}
if(!bCursorMoveShow)
return ;
//Get the mouse coordinates, relative to the coordinates of the parent form
int x_pos = event->pos().x();
int y_pos = event->pos().y();
double x_val = 0; //ui->customplot->xAxis->pixelToCoord( x_pos );
double y_val = 0; //ui->customplot->yAxis->pixelToCoord( y_pos );
//Mouse coordinates are converted to CustomPlot internal coordinates
for(int i = 0;i < ui->customplot->axisRectCount(); i + + )
{
if(event->pos().x() > ui->customplot->axisRects().at(i)->left() & amp; & amp; event->pos().y() < ui ->customplot->axisRects().at(i)->bottom()\
& amp; & amp;event->pos().x() <ui->customplot->axisRects().at(i)->right() & amp; & amp; event->pos().y () > ui->customplot->axisRects().at(i)->top())
{
//Don't convert like this
// x_val = ui->customplot->axisRects().at(i)->axis(QCPAxis::atBottom)->pixelToCoord(x_pos);
// y_val = ui->customplot->axisRects().at(i)->axis(QCPAxis::atLeft)->pixelToCoord(y_pos);
tracer->setClipAxisRect(ui->customplot->axisRects().at(i));
tracerLabel->setClipAxisRect(ui->customplot->axisRects().at(i));
}
}
x_val = ui->customplot->xAxis->pixelToCoord(x_pos);
y_val = ui->customplot->yAxis->pixelToCoord(y_pos);
qDebug()<<"x_val:"<<x_val<<",y_val:"<<y_val;
QList<QCPGraph*> listQCPGraph = ui->customplot->selectedGraphs();
if(listQCPGraph.isEmpty())
{
tracer->setVisible(false);
//bSelectGraph = false;
tracerLabel->setVisible(false);
ui->customplot->replot();
}
else
{
QCPGraph* curGraph = listQCPGraph.at(0);
CDatabind* pUserDat = (CDatabind*)curGraph->userData(0);
double value;
double num = 0;
int index = x_val;
if(pUserDat)
{
int m_nWaveInd = pUserDat->m_nWaveInd;
num = curGraph->data()->at(index)->key;
value = curGraph->data()->at(index)->value;
for(int j = mMoveTime[m_nWaveInd].count() -1; j >= 0;j--)
{
sMoveTime var;
var = mMoveTime[m_nWaveInd].at(j);
if(var.name == "Y*")
{
if(var.num != 0)
{
value = value / var.num;
}
}
else
{
value = value - var.num;
}
}
}
QString mGraphInfo;
mGraphInfo = m_pViewTable->currentItem()->text();
tracer->setVisible(true);
tracerLabel->setVisible(true);
tracer->position->setCoords(x_val, y_val);
tracerLabel->setText( mGraphInfo + "\\
( X:" + QString::number(num) +
",Y:" + QString::number(value) + " )" );
pCurLabel[0]->setText("CurX:" + QString::number(num));
pCurLabel[1]->setText("CurY:" + QString::number(value));
ui->customplot->replot();
}
}
The mouseMoveEvent function has been rewritten, where
tracer->setClipAxisRect(ui->customplot->axisRects().at(i)); tracerLabel->setClipAxisRect(ui->customplot->axisRects().at(i));
is the key. The if(pUserDat) fragment is to restore the actual values of operations such as curve zooming, zooming, and translation. You can ignore it.
4 Add curve function
void MainWindow::InsertGraph(RecFile *pRec,int nWaveInd){
QCPGraph *graph;
Qt::CheckState bSet;
bSet = m_pViewTable->item(nWaveInd,0)->checkState();
if(!bSet & amp; & amp; model == sMulCoord )
graph = ui->customplot->addGraph(ui->customplot->axisRect()->axis(QCPAxis::atBottom),\
ui->customplot->axisRect()->axis(QCPAxis::atLeft));
else if(model == sMulCoord & amp; & amp; axisList.at(m_WaveIndex) != nullptr){
graph = ui->customplot->addGraph(axisList.at(m_WaveIndex)->axis(QCPAxis::atBottom),axisList.at(m_WaveIndex )->axis(QCPAxis::atLeft));
m_WaveIndex + + ;
}
else
graph = ui->customplot->addGraph(ui->customplot->axisRect()->axis(QCPAxis::atBottom),\
ui->customplot->axisRect()->axis(QCPAxis::atLeft));
graph->setVisible(bSet);
graph->setData(pRec->Key,pRec->DatWave[nWaveInd]);
graph->setPen(QPen(QColor::fromHsl((nWaveInd * 30) % 256,255 - (nWaveInd * 30) / 16,128)));
graph->setName(m_pViewTable->item(nWaveInd,0)->text());
CDatabind *m_pUserData = new CDatabind();
m_pUserData->SetUserData(pRec->nFileInd,nWaveInd);
graph->setUserData(0,m_pUserData);
graph->setAdaptiveSampling(true);
}
The definitions of many variables are not written out and can be flexibly changed as needed.
5 Create a single X-axis and multiple Y-axis coordinate system
void MainWindow::ModelXMulY_Coord()
{
ui->customplot->plotLayout()->setMargins(QMargins(0, 10, 0, 0));
ui->customplot->plotLayout()->elementAt(0)->setMarginGroup(QCP::msLeft, marginGroup);
for(int i = 0;i < m_pViewTable->rowCount();i + + ){
QCPAxis *newAxis = new QCPAxis(ui->customplot->axisRect(),QCPAxis::atLeft);
newAxis->setBasePen(QPen(m_pViewTable->item(i,1)->backgroundColor()));
newAxis->setTickLabelColor(m_pViewTable->item(i,1)->backgroundColor());
//Add multiple Y axes
ui->customplot->axisRect()->addAxis(QCPAxis::atLeft,newAxis);
axisList_Y.append(newAxis);
}
//Depending on whether the CheckBox is visible
for(int i = 0;i < m_pViewTable->rowCount() ;i + + ){
if(!m_pViewTable->item(i,0)->checkState())
ui->customplot->axisRect()->axis(QCPAxis::atLeft,i + 1)->setVisible(false);
}
//Whether to display Y-axis coordinates
if(!bShowYCoord){
for(int i = 0;i < m_pViewTable->rowCount() ;i + + ){
ui->customplot->axisRect()->axis(QCPAxis::atLeft,i + 1)->setVisible(false);
}
}
qDebug()<<"ModelXMulY_Coord"<<ui->customplot->axisRect()->axes().count();
qDebug()<<"ModelXMulY_Coord QCPAxis::atLeft"<<ui->customplot->axisRect()->axes(QCPAxis::atLeft).count();
ui->customplot->plotLayout()->simplify();
horizontal.clear();
horizontal.append(ui->customplot->axisRect()->axis(QCPAxis::atBottom));
//Set the scaling of the Y-axis coordinate system
ui->customplot->axisRect()->setRangeZoomAxes(horizontal,axisList_Y);
}