QT在另一个小部件内插入小部件 [英] QT insert widget inside an other widget

问题描述

我用qt Creator创建了一个UI，在这个UI中只有一个按钮和一个小部件(我们分别将其称为button和char_container)； 我需要以编程方式在chart_container内部添加一个chartview. 我没有更改默认布局.

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.

我尝试了以下代码，但无法正常工作:

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();
}

推荐答案

将控件添加到另一个控件中的最佳方法是使用布局，如下所示:

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);
}

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