When the dialog pops up, the chart series is drawn over the dialog.

IknowQT

wSetupBaseBckg::wSetupBaseBckg(wSpectrum_Settings* pSetUpWidget, QWidget* parent)
	: QDialog(parent), m_bClose(false),
	m_pWidget(pSetUpWidget)
{
	ui.setupUi(this);
	this->setWindowFlags(Qt::FramelessWindowHint);

	this->setStyleSheet("QDialog{background-color: rgba(255, 255, 255, 100);}");

	pSetUpWidget->setFixedSize(parent->size().width() * 75 / 100, parent->size().height() * 85 / 100);
	this->ui.verticalLayout->addWidget(pSetUpWidget);

	this->connect(pSetUpWidget, SIGNAL(UserDefineWidgetClose()), this, SLOT(WidgetClose()));
	this->connect(pSetUpWidget, SIGNAL(UserDefineWidgetApply()), this, SLOT(WidgetClose()));

	pSetUpWidget->Initailize();
}

void wSpectrum::InitTableWidget()
{
	m_pChart->setTitle(m_pSpectrumInfo->strMethodName);

	QList<QPair<QString, QList<qreal>>> lstTemp;
	QPair<QString, QList<qreal>> pairTemp;

	pairTemp.first = "WaveLength";
	pairTemp.second = m_pSpectrumInfo->GetWaves();
	lstTemp.append(pairTemp);

	if (!m_pDataModel)
	{
		m_pDataModel = new usrTableModel(lstTemp);
		this->ui.tableWidget->setModel(m_pDataModel);
	}
	else
	{
		m_pDataModel->InitData();
		m_pDataModel->SetLowData(lstTemp);
		this->ui.tableWidget->reset();
	}
	//this->ui.tableWidget->setModel(m_pDataModel);

	/*if (!m_pHeaderModel)
		m_pHeaderModel = new usrTableModel(lstTemp);
	else
	{
		m_pHeaderModel->InitData();
		m_pHeaderModel->SetLowData(lstTemp);
	}
	this->ui.tableWidget->InitFrozenTableview(m_pHeaderModel);*/

	// [축 설정]
	auto xAixs = std::minmax_element(lstTemp[0].second.begin(), lstTemp[0].second.end());
	m_pChart->axisX()->setRange(*xAixs.first, *xAixs.second);
	m_pChart->axisY()->setRange(0, 5);	

	QValueAxis* axisx = qobject_cast<QValueAxis*>(m_pChart->axes(Qt::Horizontal).first());
	axisx->setTickCount(5);

	this->ui.tableWidget->update();
}

After drawing the chart, a dialog box pops up.
When popping up, the chart is drawn over the dialog.
I made the dialog background transparent, is that the cause? Other controls are well hidden.
However, only the line series of the chart is drawn.

I found one more problem. Tablemodel's subclassing data and headData's events are not received.
So the data is not visible on the UI.

QXYModelMapperPrivate::initializeXYFromModel "Invalid Y coordinate index in model mapper."
A message appears.

There seems to be a problem initializing the chart.
There doesn't seem to be any problem with the code.

IknowQT

@IknowQT

is this a bug? please answer

I have discovered one thing.
I am using this option( pSeries->setUseOpenGL(true); ) to improve the speed of the line series.
If I comment this out, it works fine.

Christian Ehrlicher

Without a minimal, compilable example we can't say if it's a bug in Qt or on your side. I would guess it's on your side.

IknowQT

@Christian-Ehrlicher

void wSpectrum::AddChartSeries(bool isData, usrTableModel* pModel)
{
	QLineSeries* pSeries = new QLineSeries(m_pChart);
	//pSeries->setUseOpenGL(true);							// 속도 향상

	QVXYModelMapper* mapper = new QVXYModelMapper(this);
	mapper->setXColumn(0);
	mapper->setYColumn(pModel->GetColCount()-1);
	
	if(isData)
		mapper->setSeries(pSeries);

	mapper->setModel(pModel);

	m_pChart->addSeries(pSeries); 
	m_pChart->createDefaultAxes();

	// [축 재설정] 
	{
		QValueAxis* axisx = qobject_cast<QValueAxis*>(m_pChart->axes(Qt::Horizontal).first());
		axisx->setTickCount(5);

		m_pChart->axisX()->setTitleFont(cGlobalParam::gGetChartAxis(true));
		m_pChart->axisX()->setTitleText("Wave Length");
		m_pChart->axisX()->setTitleBrush(QBrush(QColor(76, 127, 185)));		

		m_pChart->axisY()->setTitleFont(cGlobalParam::gGetChartAxis(true));
		m_pChart->axisY()->setTitleText("Absorbance.");
		m_pChart->axisY()->setTitleBrush(QBrush(QColor(76, 127, 185)));
	}

	// [행의 마지막 위치로 이동]
	QModelIndex index = pModel->index(0, pModel->GetColCount()-1, QModelIndex());
	this->ui.tableWidget->scrollTo(index, QAbstractItemView::PositionAtTop);
}

void wSpectrum::BtnMeasure()
{
	QPair<QString, QList<qreal>> pairTemp2;

    pairTemp2.first = QString("D_%1").arg(m_pDataModel->GetInputData().count());
	for (int i = 0; i < this->m_pSpectrumInfo->GetDataCount()+1; i++)
	{        
		qreal qRan1 = QRandomGenerator::global()->bounded(0, 10);
		qreal qRan2 = QRandomGenerator::global()->generateDouble();
		pairTemp2.second.append(qRan1 + qRan2);
	}
	m_pDataModel->AppendData(pairTemp2);

    AddChartSeries(true, m_pDataModel);	
	//this->update();
}

I am connecting tables and charts with Abstractmodel. It draws a series whenever data comes in, but the setUseOpenGL option seems to be the cause. Please understand that we cannot upload the full source.

IknowQT

@Christian-Ehrlicher

pSeries->setUseOpenGL(true); If I disable the function, it works fine.
The problem with this is that even if you delete all the series in the chart, it remains on the screen. But when I switch to another screen with the mouse, it is cleared.

This is a bug.

Christian Ehrlicher

If you can't provide a minimal, compilable example we can't help here. I doubt it's a bug in Qt but on your side. If you think it's a bug, write a bug report but even there you need a minimal, compilable examle to get your problem fixed...

IknowQT

@Christian-Ehrlicher

https://github.com/HaonPAPA/MyRepository/blob/main/linechart.7z

I have created an example. A dialog box pops up after creating a series by clicking the Add series button.
A blue widget is floating in the dialog. It is drawn over the widget.

Christian Ehrlicher

It's the combination of Qt::FramelessWindowHint and OpenGl. You should create a bug report with your testcase.

IknowQT

@Christian-Ehrlicher

Are you saying it's a bug?

Christian Ehrlicher

Yes - as I told you create a bug report, but why do you need such a dialog on top?

IknowQT

@Christian-Ehrlicher

I am trying to open an option window. However, as a form of style, I tried to lower the alpha value around it to draw more attention to the options window.

The method I have implemented may not be the normal method.
If there is a better way please suggest

Christian Ehrlicher

What's wrong with a simple QDialog?

IknowQT

@Christian-Ehrlicher

This is the UI I wanted.

Christian Ehrlicher

This is a simple QMessageBox. Why so much work? Why must it be frameless?

IknowQT

@Christian-Ehrlicher

The program we are developing is user UI-oriented, so we have to pay a lot of attention to the little things.

answer my question
What I want is to blur the background behind it. It could be done very simply in C# too.
Is there a better way than the way I did?

Christian Ehrlicher

I don't know - if you've a commercial license then ask TQtC to fix it. Otherwise find a workaround.