Qt Documentation

Contents

ObjectModel QML Type

Defines a set of items to be used as a model. More...

Import Statement: import QtQml.Models 2.14

Properties

Attached Properties

Methods

Detailed Description

An ObjectModel contains the visual items to be used in a view. When an ObjectModel is used in a view, the view does not require a delegate since the ObjectModel already contains the visual delegate (items).

An item can determine its index within the model via the index attached property.

The example below places three colored rectangles in a ListView.

import QtQuick 2.0
import QtQml.Models 2.1

Rectangle {
    ObjectModel {
        id: itemModel
        Rectangle { height: 30; width: 80; color: "red" }
        Rectangle { height: 30; width: 80; color: "green" }
        Rectangle { height: 30; width: 80; color: "blue" }
    }

    ListView {
        anchors.fill: parent
        model: itemModel
    }
}

See also Qt Quick Examples - Views.

Property Documentation

count : int

The number of items in the model. This property is readonly.


Attached Property Documentation

ObjectModel.index : int

This attached property holds the index of this delegate's item within the model.

It is attached to each instance of the delegate.


Method Documentation

append(item)

Appends a new item to the end of the model.

objectModel.append(objectComponent.createObject())

This method was introduced in Qt 5.6.

See also insert() and remove().


clear()

Clears all items from the model.

This method was introduced in Qt 5.6.

See also append() and remove().


object get(index)

Returns the item at index in the model. This allows the item to be accessed or modified from JavaScript:

Component.onCompleted: {
    objectModel.append(objectComponent.createObject())
    console.log(objectModel.get(0).objectName);
    objectModel.get(0).objectName = "first";
}

The index must be an element in the list.

This method was introduced in Qt 5.6.

See also append().


insert(index, object item)

Inserts a new item to the model at position index.

objectModel.insert(2, objectComponent.createObject())

The index must be to an existing item in the list, or one past the end of the list (equivalent to append).

This method was introduced in Qt 5.6.

See also append() and remove().


move(from, int to, int n = 1)

Moves n items from one position to another.

The from and to ranges must exist; for example, to move the first 3 items to the end of the model:

objectModel.move(0, objectModel.count - 3, 3)

This method was introduced in Qt 5.6.

See also append().


remove(index, int n = 1)

Removes n items at index from the model.

This method was introduced in Qt 5.6.

See also clear().


© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.