Close QChartView with main window?

[pauledd]

Hi, why doesnt a QChartView get closed if I close the mainwindow? Even when I put "cv.close" in the MainWindow destructor the chart window stays open...

mainwindow.h

class MainWindow : public QWidget
{
	Q_OBJECT
public:
	explicit MainWindow(QWidget *parent = 0);
	~MainWindow();
private:
	QPushButton *pushButtonDrawChart;

	QLineSeries *ls;
	QChart *chart;
	QChartView *cv;

private slots:
	void drawChart();
};

mainwindow.cpp

MainWindow::MainWindow(QWidget *parent) : QWidget(parent)
{
	setGeometry(400,400,640,420);
	pushButtonDrawChart = new QPushButton("Draw Chart", this);
	connect(pushButtonDrawChart, &QPushButton::clicked, this, &MainWindow::drawChart);
	}

MainWindow::~MainWindow()
{
	qDebug() << "Destructor called";
}

void MainWindow::drawChart(){
	
	ls = new QLineSeries();
	ls->append(0,1);
	ls->append(1,2);
	ls->append(2,3);
	ls->append(3,4);
	chart = new QChart();
	chart->addSeries(ls);
	chart->createDefaultAxes();
	cv = new QChartView(chart);
	cv->show();	
}

[VRonin]

• do not create a new chart and chartview every time you call drawChart, leave chart = new QChart(); and cv = new QChartView(chart); in the constructor.
• call chart->removeAllSeries() in drawChart before adding a new one
• use cv->show(); and cv->hide(); to togle the display of the chart
• call chart->deleteLater(); and cv->deleteLater(); in MainWindow's destructor
• no need to make ls a member, a local variable is enough
• put pushButtonDrawChart in a layout to ensure it's displayed correctly

[pauledd]

Works, thank you.