- Qt 5.15
- QML Types
- Package QML Type
- Qt 5.15.18 Reference Documentation

# Package QML Type

Specifies a collection of named items. More...

Import Statement: | import QtQml.Models 2.15

- List of all members, including inherited members

## Attached Properties

- name : string

## Detailed Description

The Package type is used in conjunction with DelegateModel to enable delegates with a shared context to be provided to multiple views.

Any item within a Package may be assigned a name via the Package.name attached property.

The example below creates a Package containing two named items; list and grid. The third item in the package (the Rectangle) is parented to whichever delegate it should appear in. This allows an item to move between views.

     Package {
         Text { id: listDelegate; width: parent.width; height: 25; text: 'Empty'; Package.name: 'list' }
         Text { id: gridDelegate; width: parent.width / 2; height: 50; text: 'Empty'; Package.name: 'grid' }

         Rectangle {
             id: wrapper
             width: parent.width; height: 25
             color: 'lightsteelblue'

             Text { text: display; anchors.centerIn: parent }
             state: root.upTo > index ? 'inGrid' : 'inList'
             states: [
                 State {
                     name: 'inList'
                     ParentChange { target: wrapper; parent: listDelegate }
                 },
                 State {
                     name: 'inGrid'
                     ParentChange {
                         target: wrapper; parent: gridDelegate
                         x: 0; y: 0; width: gridDelegate.width; height: gridDelegate.height
                     }
                 }
             ]

             transitions: [
                 Transition {
                     ParentAnimation {
                         NumberAnimation { properties: 'x,y,width,height'; duration: 300 }
                     }
                 }
             ]
         }
     }

These named items are used as the delegates by the two views who reference the special DelegateModel::parts property to select a model which provides the chosen delegate.

     DelegateModel {
         id: visualModel
         delegate: Delegate {}
         model: myModel
     }

     ListView {
         id: lv
         height: parent.height/2
         width: parent.width

         model: visualModel.parts.list
     }
     GridView {
         y: parent.height/2
         height: parent.height/2
         width: parent.width
         cellWidth: width / 2
         cellHeight: 50
         model: visualModel.parts.grid
     }

Note: Package is part of QtQml.Models since version 2.14 and part of QtQuick since version 2.0. Importing Package via QtQuick is deprecated since Qt 5.14.

See also Qt Quick Examples - Views, Qt Quick Demo - Photo Viewer, and Qt QML.

## Attached Property Documentation

Package.name : string

This attached property holds the name of an item within a Package.