examples-lineandbarchart.qdoc
46 lines
| 1.6 KiB
| text/plain
|
TextLexer
sauimone
|
r1634 | /*! | ||
| \example examples/lineandbar | ||||
| \title Line and BarChart Example | ||||
| \subtitle | ||||
| The example shows how to combine different charts and set the axes. In the example we combine linechart with | ||||
| barchart and use category axis as common axis for both. | ||||
| \image examples_lineandbar.png | ||||
| Here we create data for our barseries. | ||||
| \snippet ../examples/lineandbar/main.cpp 1 | ||||
| We create the barseries and append the sets to it. | ||||
Mika Salmela
|
r2456 | First values of each set are grouped together at first category second value to second category and so on. | ||
|
sauimone
|
r1634 | |||
| \snippet ../examples/lineandbar/main.cpp 2 | ||||
| Then we create lineseries and add data to it. To make data match with barchart we use index as an x-value for our line series, so that | ||||
| first point is at (0,value) second at (1,value) and so on. | ||||
| \snippet ../examples/lineandbar/main.cpp 8 | ||||
| Here we create the chart and add both series to it. | ||||
| \snippet ../examples/lineandbar/main.cpp 3 | ||||
| To make chart show series properly, we have to create custom axes for series. If we don't create custom axes, then each series will get scaled to | ||||
| use maximum area of the chart (like in single series case) and result will be incorrect. With custom axes we set the range of both series to follow same | ||||
| axis. For x-axis we use QBarCategoryAxis and for y-axis we use QValuesAxis. | ||||
| \snippet ../examples/lineandbar/main.cpp 4 | ||||
| And we also want to show the legend. | ||||
| \snippet ../examples/lineandbar/main.cpp 5 | ||||
| Finally we add the chart onto a view. | ||||
| \snippet ../examples/lineandbar/main.cpp 6 | ||||
| And it is ready to be shown in a window. | ||||
| \snippet ../examples/lineandbar/main.cpp 7 | ||||
| */ | ||||