examples-barchart.qdoc
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Michal Klocek
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Tero Ahola
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r500 | \example examples/barchart | |
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r387 | \title BarChart Example | |
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Michal Klocek
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r330 | ||
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r387 | The example shows how to create simple bar chart. Barchart shows the data in sets as separate bars, which are grouped in categories. | |
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Michal Klocek
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r330 | ||
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r387 | \image barchart.png | |
| First we define categories. | |||
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r492 | \snippet ../examples/barchart/main.cpp 1 | |
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r387 | ||
| Data that barchart visualizes, is defined by QBarSet instances. Here we create some sets and append data | |||
| we want to visulaize to them. | |||
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r492 | \snippet ../examples/barchart/main.cpp 2 | |
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r387 | ||
| To combine the sets and categories to a chart, we need to create QBarSeries instance. When creating | |||
| the QBarSeries, the categories must be known. Sets can be added later. For example purposes the sets | |||
| are added to series here. | |||
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r492 | \snippet ../examples/barchart/main.cpp 3 | |
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r387 | ||
| We want our barchart to behave so, that when mouse is hovered over bar, the name of set which the bar | |||
| represents is shown as tooltip. | |||
| Also when we click the bar, floating values for the set are toggled. Floating values are the data values | |||
| that are drawn on top of bars. | |||
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r492 | \snippet ../examples/barchart/main.cpp 4 | |
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| Here we create the view and add our series to it. Also we set the title and theme we want our chart to use | |||
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r492 | \snippet ../examples/barchart/main.cpp 5 | |
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r387 | ||
| For barchart, we don't need X-axis to be visible, so it can be disabled. | |||
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r492 | \snippet ../examples/barchart/main.cpp 6 | |
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Michal Klocek
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r330 | */ |