diff options
Diffstat (limited to 'examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc')
| -rw-r--r-- | examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc b/examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc index c574950b..e13320c3 100644 --- a/examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc +++ b/examples/datavisualization/qmloscilloscope/doc/src/qmloscilloscope.qdoc @@ -59,19 +59,14 @@ we still need to call QSurfaceDataProxy::resetArray() after changing the data in it to prompt the graph to render the data. - The final method, \c selectionLabel(), is used to generate a label string we can show on the - QML ui. This method utilizes the axis formats to format the label: - - \snippet qmloscilloscope/datasource.cpp 2 - To be able to access the \c DataSource methods from QML, we need to expose it. We do this by defining a context property in application main: \snippet qmloscilloscope/main.cpp 0 - To make it possible to use Qt Data Visualization class pointers as parameters on the + To make it possible to use QSurface3DSeries pointers as parameters on the \c DataSource class methods on all environments and builds, we need to make sure the meta - types are registered: + type is registered: \snippet qmloscilloscope/datasource.cpp 3 \dots 0 @@ -86,15 +81,11 @@ One interesting detail is that we don't specify a proxy for the Surface3DSeries we attach to the graph. This makes the series to utilize the default QSurfaceDataProxy. - We also specify an empty string for \l{Abstract3DSeries::itemLabelFormat}{itemLabelFormat}, since we want to display - the selected item information in a \c Text element instead of a label above the selection pointer. + We also hide the item label with \l{Abstract3DSeries::itemLabelVisible}{itemLabelFormat}, since + we want to display the selected item information in a \c Text element instead of a floating + label above the selection pointer. This is done because the selection pointer moves around a lot as the data changes, which makes the regular selection label difficult to read. - When selection point changes, we update the label text using a helper function - \c updateSelectionLabel(), which calls one of the methods we defined for our \c DataSource class - to obtain the label: - - \snippet qmloscilloscope/qml/qmloscilloscope/main.qml 1 We initialize the \c DataSource cache when the graph is complete by calling a helper function \c generateData(), which calls the method with the same name on the \c DataSource: |