- Qt 5.5
- Qt Quick
- Qt Quick Examples - Positioners
- Qt 5.5.1 Reference Documentation

# Qt Quick Examples - Positioners

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 * ratio
        height: 100 * 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)
        }
    }

Files:

- positioners/positioners-attachedproperties.qml
- positioners/positioners-transitions.qml
- positioners/positioners.qml
- positioners/main.cpp
- positioners/positioners.pro
- positioners/positioners.qmlproject
- positioners/positioners.qrc