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