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/*!
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\example demos/qmloscilloscope
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\title Oscilloscope
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\image demos_qmloscilloscope.png
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Oscilloscope application demonstrates how to use QtCommercial Charts QML api to implement an
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application with strict performance requirements. The application uses generated data with
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configurable characteristics to mimic a simple oscilloscope user interface. To find out the
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actual screen refresh performance of the application, you can set QML_SHOW_FRAMERATE = 1 to
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your run environment settings to get the framerate shown in the application output console.
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I.e. go to Projects - Run - Run environment in Qt Creator and select Add. Then you can
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experiment with the different configurable options of the demo application to find the
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configuration that gives you the best performance in your environment.
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Note: You can try if enabling OpenGL improves the performance with the following startup
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parameter:
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\code
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-graphicssystem opengl
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\endcode
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The application window is shared by control and scope views:
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\snippet ../demos/qmloscilloscope/qml/qmloscilloscope/main.qml 1
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\snippet ../demos/qmloscilloscope/qml/qmloscilloscope/main.qml 2
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ControlView implements the buttons used for configuring. ScopeView uses a ChartView to show
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a chart with two line series:
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\snippet ../demos/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml 1
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The data of the line series is updated with a QML timer. In a real life application the
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updating could triggered with a signal from Qt C++ code.
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\snippet ../demos/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml 2
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The oscilloscope also allows you to switch the type of the series used for visualizing the
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signal sources. This is implemented by dynamically destroying and creating series:
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\snippet ../demos/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml 3
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*/
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