address Suggestions in a QListView

ArtX

this is a Qt5.15 question + Runtime SDK Qt 100.12.0 and C++ code (not QML)

well...

I Try to use the address Suggestions in a QListView, populated directly from the SuggestListModel.

but I see just empty lines (without text) even though i see the coming rows in the QListView.

I also confirmed the model is working as expected, receiving the relative suggestions using the following code ...

    QList<Esri::ArcGISRuntime::SuggestResult> lst = m_suggestListModel->suggestResults();
    qDebug() << lst.at(0).label();
    qDebug() << lst.at(1).label();
    ...
    // indeed i see the comming suggestions 

this is the code i use:

SuggestParameters suggestParams;
suggestParams.setCategories(QStringList {"Address"});
suggestParams.setMaxResults(5);
m_locatorTask->suggestions()->setSuggestParameters(suggestParams);
m_suggestListModel = m_locatorTask->suggestions();

m_listview->setModel( m_suggestListModel );

m_suggestListModel->setSearchText(text);

any clue ?

thank you!

Anonymous User

Hi Art,

SuggestListModel doesn't automatically populate the DisplayRole, which is the default role for rendering text in a QListView: https://doc.qt.io/qt-5/qt.html#ItemDataRole-enum

You can write either a custom delegate to render for custom roles, or write a proxy model that can massage one of the SuggestListModel's custom roles into a DisplayRole. Here's an example in the Qt tutorials where a similar approach is taken with the DecorationRole: https://github.com/Esri/arcgis-runtime-samples-qt/blob/main/ArcGISRuntimeSDKQt_CppSamples_Widgets/DisplayInformation/BuildLegend/BuildLegend.cpp#L40