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Updated QML Oscilloscope documentation...
Titta Heikkala -
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@@ -28,12 +28,13
28
28
29 The oscilloscope application demonstrates how to use the Qt Charts QML API to implement an
29 The oscilloscope application demonstrates how to use the Qt Charts QML API to implement an
30 application with strict performance requirements. The application uses generated data with
30 application with strict performance requirements. The application uses generated data with
31 configurable characteristics to mimic a simple oscilloscope user interface. To find out the
31 configurable characteristics to mimic a simple oscilloscope user interface.
32 actual screen refresh performance of the application, you can set QML_SHOW_FRAMERATE = 1 to
32
33 your run environment settings to get the framerate shown in the application output console.
33 To get information about actual rendering speed shown in the application output console, you can
34 To do so go to Projects - Run - Run environment in Qt Creator and select Add. Then you can
34 set QSG_RENDER_TIMING = 1 to your run environment settings. To do so go to Projects - Run -
35 experiment with the different configurable options of the example application to find the
35 Run environment in Qt Creator and select Add. Then you can experiment with the different
36 configuration that gives you the best performance in your environment.
36 configurable options of the example application to find the configuration that gives you the
37 best performance in your environment.
37
38
38 The application window is shared by control and scope views:
39 The application window is shared by control and scope views:
39 \snippet qmloscilloscope/qml/qmloscilloscope/main.qml 1
40 \snippet qmloscilloscope/qml/qmloscilloscope/main.qml 1
@@ -53,7 +54,4
53 signal sources. This is implemented by dynamically destroying and creating series:
54 signal sources. This is implemented by dynamically destroying and creating series:
54 \snippet qmloscilloscope/qml/qmloscilloscope/ScopeView.qml 3
55 \snippet qmloscilloscope/qml/qmloscilloscope/ScopeView.qml 3
55
56
56 \note QML_SHOW_FRAMERATE environment variable doesn't work with Qt Quick 2.
57 From Qt 5.1.0 on, the QSG_RENDER_TIMING environment variable can be used
58 similarly to display rendering time.
59 */
57 */
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