Qt 5.7 | Qt Quick | QML Types | ParentAnimation QML Type

Qt 5.7.1 Reference Documentation

# ParentAnimation QML Type

Animates changes in parent values More...

Import Statement: | import QtQuick 2.7
Since: | Qt 5.0
Inherits: | Animation

- List of all members, including inherited members

## Properties

- newParent : Item
- target : Item
- via : Item

## Detailed Description

ParentAnimation is used to animate a parent change for an Item.

For example, the following ParentChange changes `blueRect` to become a child of `redRect` when it is clicked. The inclusion of the ParentAnimation, which defines a NumberAnimation to be applied during the transition, ensures the item animates smoothly as it moves to its new parent:

      import QtQuick 2.0

      Item {
          width: 200; height: 100

          Rectangle {
              id: redRect
              width: 100; height: 100
              color: "red"
          }

          Rectangle {
              id: blueRect
              x: redRect.width
              width: 50; height: 50
              color: "blue"

              states: State {
                  name: "reparented"
                  ParentChange { target: blueRect; parent: redRect; x: 10; y: 10 }
              }

              transitions: Transition {
                  ParentAnimation {
                      NumberAnimation { properties: "x,y"; duration: 1000 }
                  }
              }

              MouseArea { anchors.fill: parent; onClicked: blueRect.state = "reparented" }
          }
      }

A ParentAnimation can contain any number of animations. These animations will be run in parallel; to run them sequentially, define them within a SequentialAnimation.

In some cases, such as when reparenting between items with clipping enabled, it is useful to animate the parent change via another item that does not have clipping enabled. Such an item can be set using the via property.

ParentAnimation is typically used within a Transition in conjunction with a ParentChange. When used in this manner, it animates any ParentChange that has occurred during the state change. This can be overridden by setting a specific target item using the target property.

See also Animation and Transitions in Qt Quick and Qt Quick Examples - Animation.

## Property Documentation

newParent : Item

The new parent to animate to.

If the ParentAnimation is defined within a Transition, this value defaults to the value defined in the end state of the Transition.

target : Item

The item to reparent.

When used in a transition, if no target is specified, all ParentChange occurrences are animated by the ParentAnimation.

via : Item

The item to reparent via. This provides a way to do an unclipped animation when both the old parent and new parent are clipped.

      ParentAnimation {
          target: myItem
          via: topLevelItem
          // ...
      }

Note: This only works when the ParentAnimation is used in a Transition in conjunction with a ParentChange.