QChart setPointLabelsVisible

QChart setPointLabelsVisible is a method in the Qt framework that sets the visibility of the data point labels in a chart. Data point labels are the labels that are displayed next to each data point in a chart, providing additional information about the plotted data.

The syntax for using this method is as follows:

void QChart::setPointLabelsVisible(bool visible)

The parameter `visible` is a boolean value that indicates whether to show or hide the data point labels. If `visible` is set to `true`, the labels will be displayed. If `visible` is set to `false`, the labels will be hidden.

Here's an example of how to use the `setPointLabelsVisible` method:

QChart *chart = new QChart();
// ... populate chart with data ...
chart->setPointLabelsVisible(true); // show the data point labels

This will display the data point labels for all data points in the chart. If you want to only show the labels for certain data points, you can use the `QLineSeries::setPointLabelsVisible` method instead:

QLineSeries *series = new QLineSeries();
// ... populate series with data ...
series->setPointLabelsVisible(true); // show the data point labels for this series

This will only display the data point labels for the data points in the specified `QLineSeries` object.