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-/*!
- \example examples/horizontalpercentbarchart
- \title HorizontalPercentBarChart Example
- \subtitle
-
- The example shows how to create a simple horizontal percent bar chart. The horizontal percent bar chart shows the data in a set as a percentage of
- all sets per category.
-
- Creating a horizontal percent bar chart is just like creating a regular \l {BarChart Example} {bar chart}, except that for a
- horizontal percent bar chart, we use the QHorizontalPercentBarSeries api instead of QBarSeries. Also, in the
- \l {BarChart Example} {bar chart}, we used a nice numbers algorithm to make the y-axis numbering look better. With
- the percent bar chart there is no need for that, because the maximum y-axis value is always 100.
-
- \image examples_horizontalpercentbarchart.png
-
- The barsets are used in same way in all barcharts.
- To illustrate the difference between various barcharts, we use same data in examples.
- The data which the bar chart visualizes is defined by QBarSet instances. Here we create the sets and append data
- to them. The data is appended here with << operator. Alternatively the append method could be used.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 1
-
- We create the series and append the bar sets to it. The series takes ownership of the barsets. The series groups the data from sets to categories.
- The first values of each set are grouped together in the first category, the second value in the second category etc.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 2
-
- Here we create the chart object and add the series to it. We set the title for chart with setTitle and then turn on animations of the series by calling
- setAnimationOptions(QChart::SeriesAnimations)
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 3
-
- To have the categories displayed on an axis, we need to create a QBarCategoryAxis first. Here we create a category axis with a list of categories and
- set it to be the y-axis of the chart. The chart takes ownership of the axis. For the x-axis we use the default axis, which is created and scaled to series data
- by calling createDefaultAxes of the chart. Note that createDefaultAxes must be called before we set the category axis. Otherwise the default axis will
- override the category axis.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 4
-
- We also want to show the legend. To do that, we get the legend pointer from the chart
- and set it to visible. We also place the legend to bottom of the chart by setting its
- alignment to Qt::AlignBottom.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 5
-
- Finally, we add the chart onto a view. We also turn on the antialiasing for the chartView.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 6
-
- The chart is ready to be shown. We set the chart to be the central widget of the window.
- We also set the size for the chart window and show it.
-
- \snippet ../examples/horizontalpercentbarchart/main.cpp 7
-*/