AnchorChanges QML Type

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

Import Statement: import QtQuick 2.15


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 2.0

 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.