I am new to Qt. Wondering if there a possibility to make an item "unselectable" in ListView.

I see there are a lot of other things, e.g: collapsing , expanding, etc. ** I have not find any simple example for this problem. **

Can you provide some minimalistic examples to make a specific item in the list unselectable?

I have the following minimalistic example. How can I set list item index 2 to be unselectable?

Window {
   id: mainWindow
    width: 130
    height: 240
    visible: truetitle: qsTr("Hello")

    Rectangle {
        id: bg
        color: "#ffffff"
        anchors.fill: parent
    
        ListModel {
            id: nameModel
            ListElement { name: "Alice" }
            ListElement { name: "Bob" }
            ListElement { name: "Jay" }
            ListElement { name: "Kate" }
        }
        Component {
            id: nameDelegate
            Text {
                text: model.name
                font.pixelSize: 24
            }
        }
        ListView {
            anchors.fill: parent
            model: nameModel
            delegate: nameDelegate
            clip: true
    
            highlight: Rectangle {
                anchors { left: parent.left; right: parent.right }
                //height: parent.height
                color: "lightgrey"
            }
        }
    }
}

CodePudding user response：

I found numerous issues with your code snippet, so I attempted to address them all:

• I made use of Page and set Page.background instead of declaring an outer Rectangle. This removes a level of indentation
• I refactored NameComponent.qml to reduce the complexity of your main program
• I change the delegate from Text to ItemDelegate so that it is clickable, and, it being clickable, I can (1) make the ListView have active focus so that it can receive keyboard events, (2) change the current item in the ListView => I think this achieves your criteria of being able to select a different item
• I removed unnecessary anchoring from your highlight - your highlight will default anchor to your selected item
• I set the width of your delegate to listView.width - I also made use of the ListView.view attached property so that your delegate and access properties from the ListView
• Finally, I added a 20 pixel width vertical ScrollBar

import QtQuick
import QtQuick.Controls
Page {
    background: Rectangle { color: "#ffffff" }
    
    ListModel {
        id: nameModel
        ListElement { name: "Alice" }
        ListElement { name: "Bob" }
        ListElement { name: "Jay" }
        ListElement { name: "Kate" }
    }

    ListView {
        anchors.fill: parent
        model: nameModel
        delegate: NameDelegate { }
        clip: true
        highlight: Rectangle {
            color: "lightgrey"
        }
        ScrollBar.vertical: ScrollBar {
            width: 20
            policy: ScrollBar.AlwaysOn
        }
    }
}

// NameDelegate.qml
import QtQuick
import QtQuick.Controls
ItemDelegate {
    property ListView listView: ListView.view
    width: listView.width - 20
    text: model.name
    font.pixelSize: 24
    onClicked: {
        listView.forceActiveFocus();
        if (listView.currentIndex === index) {
            listView.currentIndex = -1;
        } else {
            listView.currentIndex = index;
        }
    }
}

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