Details
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Bug
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Resolution: Fixed
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P2: Important
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6.5.0 Beta2
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None
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e9f650cad (dev), be884811d (dev)
Description
I wanted to create a custom ComboBox, following the customization example:
import QtQuick.Controls
ComboBox {
id: control
delegate: MenuItem {
width: ListView.view.width
text: control.textRole ? (Array.isArray(control.model) ? modelData[control.textRole] : model[control.textRole]) : modelData
highlighted: control.highlightedIndex === index
}
}
This works with both a ListMode and a QVariantList exported from C++ as a model, but when I run this through the QML compiler, it tells me:
Warning: IconComboBox.qml:7:15: Unqualified access [unqualified] text: control.textRole ? (Array.isArray(control.model) ? modelData[control.textRole] : model[control.textRole]) : modelData ^^^^^^^ Info: Set "pragma ComponentBehavior: Bound" in order to use IDs from outer components in nested components.
Fair enough: I addde a pragma ComponentBehavior: Bound to this file and I also added the (now needed) required properties for index and modelData. Now the array / QVariantList based model works, but the ListModel based ComboBox complains at runtime:
qml: QML Component: Cannot create delegate qml: Required property modelData was not initialized (at qrc:/Mobile/IconComboBox.qml, 12)
And I get an empty popup. if I require model instead of modelData, it's the other way around.
Is there a better solution besides ignoring the qml compiler's complaint about the missing bound behavior pragma to write a generic delegate that can handle both model and modelData?
Attachments
Issue Links
- duplicates
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- Closed
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| For Gerrit Dashboard: QTBUG-110980 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 461051,33 | Models: Straighten out model and modelData properties | dev | qt/qtdeclarative | Status: MERGED | +2 | 0 |
| 474438,3 | Models: Fix condition for context object | dev | qt/qtdeclarative | Status: MERGED | +2 | 0 |