Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.12.7
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None
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macOS 10.15.4
Qt 5.12.7
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macOS
Description
Native FileDialog (macos, QtQuick.Dialogs 1.3) accesses roles of "outside" model . This happens only when FileDialog component is created inside delegate instantiated by a model that has 1 role. As soon as this model has 2 or more roles, everything works fine.
I found this strange behaviour during development of my own model based on QAbstractListModel, but i was able to simplify it by using simple ListModel in qml.
To demonstrate this behaviour:
1) run
qmlscene main.qml
2) open file dialog by clicking on a button
3) browse via different directories and choose some file (this is important ! seems like more directories you visit, more errors you get)
4) accept the dialog
5) you see bunch of errors as function cannot be converted into text. Errors themselves are not important. Important is that errors are thrown because FileDialog tries to access role from myModel.
If you used your own model based on QAbstractListModel, you would see how data() is called.
qml code to reproduce:
//main.qml import QtQuick 2.12 import QtQuick.Controls 2.12 import QtQuick.Dialogs 1.3 Item { width: 200 height: 200 ListModel { id: myModel //bug happens when model has only 1 role //everything works fine when 2 roles are used ListElement { cusomRole: function() {} //cusomRole2: function() {} } } Column { spacing: 10 Repeater { model: myModel delegate: Item { width: 100 height: 100 Button { text: "open file dialog" onClicked: { console.log("call open") fileDialog.open() } } FileDialog { id: fileDialog folder: shortcuts.documents onAccepted: { console.log("accepted") } } } } } }
console output:
~/dev/bugs/file-dialog$ ~/Qt/5.12.7/clang_64/bin/qmlscene main.qml qml: call open Model size of -163 is less than 0 Model size of -17 is less than 0 qml: accepted file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml:109:13: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:360:29: Unable to assign a function to a property of any type other than var. file:///Users/martin/Qt/5.12.7/clang_64/qml/QtQuick/Dialogs/DefaultFileDialog.qml:383:29: Unable to assign a function to a property of any type other than var.