QT insert widget inside an other widget

问题

I've created an UI with qt Creator,in this UI there is just a button and a widget (let's call it respectively button and char_container); I need to add a chartview programmatically inside the chart_container. I didn't change the default layout.

I've tried the following code,but it does not work:

void MainWindow::button_slot(){
    QtCharts::QChart *chart = new QtCharts::QChart();
    QtCharts::QChartView *chartView = new QtCharts::QChartView(chart);
    chartView->setParent(ui->chart_container);
    this.repaint();
}

回答1:

The best way to add a widget inside another is to use a layout, as I show below:

//on constructor
ui->chart_container->setLayout(new QVBoxLayout);


void MainWindow::button_slot()
{
    QtCharts::QChart *chart = new QtCharts::QChart();
    QtCharts::QChartView *chartView = new QtCharts::QChartView(chart, ui->chart_container);
    ui->chart_container->layout()->addWidget(chartView);
}

来源：https://stackoverflow.com/questions/46445790/qt-insert-widget-inside-an-other-widget