- Qt 5.15
- Qt Quick
- Qt Quick Examples - Positioners
- Qt 5.15.18 Reference Documentation

# Qt Quick Examples - Positioners

This is a collection of QML Positioner examples.

Positioners is a collection of small QML examples relating to positioners. Each example is a small QML file emphasizing a particular type or feature. For more information, visit Important Concepts In Qt Quick - Positioning.

#### Running the Example

To run the example from Qt Creator, open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.

#### Transitions

Transitions shows animated transitions when showing or hiding items in a positioner. It consists of a scene populated with items in a variety of positioners: Column, Row, Grid, and Flow. Each positioner has animations described as Transitions.

     move: Transition {
         NumberAnimation { properties: "x,y"; easing.type: Easing.OutBounce }
     }

The move transition specifies how items inside a positioner will animate when they are displaced by the appearance or disappearance of other items.

     add: Transition {
         NumberAnimation { properties: "x,y"; easing.type: Easing.OutBounce }
     }

The add transition specifies how items will appear when they are added to a positioner.

     populate: Transition {
         NumberAnimation { properties: "x,y"; from: 200; duration: 100; easing.type: Easing.OutBounce }
     }

The populate transition specifies how items will appear when their parent positioner is first created.

#### Attached Properties

Attached Properties shows how the Positioner attached property can be used to determine where an item is within a positioner.

     Rectangle {
         id: green
         color: "#80c342"
         width: 100 * page.ratio
         height: 100 * page.ratio

         Text {
           anchors.left: parent.right
           anchors.leftMargin: 20
           anchors.verticalCenter: parent.verticalCenter
           text: "Index: " + parent.Positioner.index
               + (parent.Positioner.isFirstItem ? " (First)" : "")
               + (parent.Positioner.isLastItem ? " (Last)" : "")
         }

         // When mouse is clicked, display the values of the positioner
         MouseArea {
             anchors.fill: parent
             onClicked: column.showInfo(green.Positioner)
         }
     }

Example project @ code.qt.io