- Qt 5.15
- Qt Quick Controls 1
- QML Types
- CheckBox QML Type
- Qt 5.15.19 Reference Documentation

# CheckBox QML Type

A checkbox with a text label. More...

Import Statement: | import QtQuick.Controls 1.4
Since: | Qt 5.1
Inherits: | FocusScope

- List of all members, including inherited members

## Properties

- checkedState : int
- partiallyCheckedEnabled : bool

## Detailed Description

A CheckBox is an option button that can be toggled on (checked) or off (unchecked). Checkboxes are typically used to represent features in an application that can be enabled or disabled without affecting others.

The state of the checkbox can be set with the checked property.

In addition to the checked and unchecked states, there is a third state: partially checked. This state indicates that the regular checked/unchecked state can not be determined; generally because of other states that affect the checkbox. This state is useful when several child nodes are selected in a treeview, for example.

The partially checked state can be made available to the user by setting partiallyCheckedEnabled to `true`, or set directly by setting checkedState to `Qt.PartiallyChecked`. checkedState behaves identically to checked when partiallyCheckedEnabled is `false`; setting one will appropriately set the other.

The label is shown next to the checkbox, and you can set the label text using its text property.

     Column {
         CheckBox {
             text: qsTr("Breakfast")
             checked: true
         }
         CheckBox {
             text: qsTr("Lunch")
         }
         CheckBox {
             text: qsTr("Dinner")
             checked: true
         }
     }

Whenever a CheckBox is clicked, it emits the clicked() signal.

You can create a custom appearance for a CheckBox by assigning a CheckBoxStyle.

## Property Documentation

checkedState : int

This property indicates the current checked state of the checkbox.

Possible values: `Qt.UnChecked` - The checkbox is not checked (default). `Qt.Checked` - The checkbox is checked. `Qt.PartiallyChecked` - The checkbox is in a partially checked (or "mixed") state.

The checked property also determines whether this property is `Qt.Checked` or `Qt.UnChecked`, and vice versa.

partiallyCheckedEnabled : bool

This property determines whether the `Qt.PartiallyChecked` state is available.

A checkbox may be in a partially checked state when the regular checked state can not be determined.

Setting checkedState to `Qt.PartiallyChecked` will implicitly set this property to `true`.

If this property is `true`, checked will be `false`.

By default, this property is `false`.