AnchorChanges QML Type

Specifies how to change the anchors of an item in a state. More...

Import Statement: import QtQuick


Detailed Description

The AnchorChanges type is used to modify the anchors of an item in a State.

AnchorChanges cannot be used to modify the margins on an item. For this, use PropertyChanges instead.

In the following example we change the top and bottom anchors of an item using AnchorChanges, and the top and bottom anchor margins using PropertyChanges:

import QtQuick

Rectangle {
    id: window
    width: 120; height: 120
    color: "black"

    Rectangle { id: myRect; width: 50; height: 50; color: "red" }

    states: State {
        name: "reanchored"

        AnchorChanges {
            target: myRect
            anchors.bottom: window.bottom
        PropertyChanges {
            target: myRect
            anchors.topMargin: 10
            anchors.bottomMargin: 10

    MouseArea { anchors.fill: parent; onClicked: window.state = "reanchored" }

AnchorChanges can be animated using AnchorAnimation.

//animate our anchor changes
Transition {
    AnchorAnimation {}

Changes to anchor margins can be animated using NumberAnimation.

For more information on anchors see Anchor Layouts.

Property Documentation

anchors group

anchors.baseline : AnchorLine

anchors.bottom : AnchorLine

anchors.horizontalCenter : AnchorLine

anchors.left : AnchorLine

anchors.right : AnchorLine : AnchorLine

anchors.verticalCenter : AnchorLine

These properties change the respective anchors of the item.

To reset an anchor you can assign undefined:

AnchorChanges {
    target: myItem
    anchors.left: undefined          //remove myItem's left anchor
    anchors.right: otherItem.right

target : Item

This property holds the Item for which the anchor changes will be applied.

© 2024 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.