examples-zoomlinechart.qdoc
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Jani Honkonen
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r919 | /*! | ||
| \example examples/zoomlinechart | ||||
| \title Zoom line example | ||||
| \subtitle | ||||
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Jani Honkonen
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r1388 | The example shows how to create your own custom zooming effect with QRubberBand by using a mouse | ||
| and how to use touch gestures for paning and zooming. | ||||
Tero Ahola
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r971 | \image examples_zoomlinechart1.png | ||
| \image examples_zoomlinechart2.png | ||||
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Tero Ahola
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r966 | |||
| Let's first create a line series with some example data. | ||||
| \snippet ../examples/zoomlinechart/main.cpp 1 | ||||
| Then we create a custom chart view by deriving from QChartView: | ||||
| \snippet ../examples/zoomlinechart/chartview.h 1 | ||||
| We override mouse and key event handling | ||||
| \snippet ../examples/zoomlinechart/chartview.h 2 | ||||
| Then we implement a custom logic for mouse and key events. For example pressing '+' key will zoom in and pressing | ||||
| the '-' key will zoom out. | ||||
| \snippet ../examples/zoomlinechart/chartview.cpp 1 | ||||
|
Jani Honkonen
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r1388 | |||
| We also create our own QChart: | ||||
| \snippet ../examples/zoomlinechart/chart.h 1 | ||||
| Where we can handle the gestures: | ||||
| \snippet ../examples/zoomlinechart/chart.cpp 1 | ||||
| Note that you will need to call grabGesture() to both QMainWindow and QChart. | ||||
|
Jani Honkonen
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r919 | */ | ||