ExclusiveGroup QML Type

ExclusiveGroup provides a way to declare several checkable controls as mutually exclusive. More...

• List of all members, including inherited members

Properties

• current : object

Methods

• void bindCheckable(object)
• void unbindCheckable(object)

Detailed Description

ExclusiveGroup can contain several Action items, and those will automatically get their Action::exclusiveGroup property assigned.

 ExclusiveGroup {
     id: radioInputGroup

     Action {
         id: dabRadioInput
         text: "DAB"
         checkable: true
     }

     Action {
         id: fmRadioInput
         text: "FM"
         checkable: true
     }

     Action {
         id: amRadioInput
         text: "AM"
         checkable: true
     }
 }

Several controls already support ExclusiveGroup, e.g. Action, MenuItem, Button, and RadioButton.

As ExclusiveGroup only supports Action as child items, we need to manually assign the exclusiveGroup property for other objects.

 GroupBox {
     id: group2
     title: qsTr("Tab Position")
     Layout.fillWidth: true
     RowLayout {
         ExclusiveGroup { id: tabPositionGroup }
         RadioButton {
             id: topButton
             text: qsTr("Top")
             checked: true
             exclusiveGroup: tabPositionGroup
             Layout.minimumWidth: 100
         }
         RadioButton {
             id: bottomButton
             text: qsTr("Bottom")
             exclusiveGroup: tabPositionGroup
             Layout.minimumWidth: 100
         }
     }
 }

Adding support to ExclusiveGroup

It is possible to add support for ExclusiveGroup for an object or control. It should have a checked property, and either a checkedChanged, toggled(), or toggled(bool) signal. It also needs to be bound with ExclusiveGroup::bindCheckable() when its ExclusiveGroup typed property is set.

 Item {
     id: myItem

     property bool checked: false
     property ExclusiveGroup exclusiveGroup: null

     onExclusiveGroupChanged: {
         if (exclusiveGroup)
             exclusiveGroup.bindCheckable(myItem)
     }
 }

The example above shows the minimum code necessary to add ExclusiveGroup support to any item.

Property Documentation

Method Documentation