- Qt 5.15
- Qt Quick Controls
- QML Types
- DialogButtonBox QML Type
- Qt 5.15.18 Reference Documentation

# DialogButtonBox QML Type

A button box used in dialogs. More...

Import Statement: | import QtQuick.Controls 2.15
Since: | Qt 5.8
Inherits: | Container

- List of all members, including inherited members

## Properties

- alignment : flags
- buttonLayout : enumeration
- delegate : Component
- position : enumeration
- standardButtons : enumeration

## Attached Properties

- buttonBox : DialogButtonBox
- buttonRole : enumeration

## Signals

- accepted()
- applied()
- clicked(AbstractButton button)
- discarded()
- helpRequested()
- rejected()
- reset()

## Methods

- AbstractButton standardButton(StandardButton button)

## Detailed Description

Dialogs and message boxes typically present buttons in an order that conforms to the interface guidelines for that platform. Invariably, different platforms have their dialog buttons in different orders. DialogButtonBox allows a developer to add buttons to it and will automatically use the appropriate order for the user's platform.

Most buttons for a dialog follow certain roles. Such roles include:

- Accepting or rejecting the dialog.
- Asking for help.
- Performing actions on the dialog itself (such as resetting fields or applying changes).

There can also be alternate ways of dismissing the dialog which may cause destructive results.

Most dialogs have buttons that can almost be considered standard (e.g. OK and Cancel buttons). It is sometimes convenient to create these buttons in a standard way.

There are a couple ways of using DialogButtonBox. One way is to specify the standard buttons (e.g. OK, Cancel, Save) and let the button box setup the buttons.

     DialogButtonBox {
         standardButtons: DialogButtonBox.Ok | DialogButtonBox.Cancel

         onAccepted: console.log("Ok clicked")
         onRejected: console.log("Cancel clicked")
     }

Alternatively, buttons and their roles can be specified by hand:

     DialogButtonBox {
         Button {
             text: qsTr("Save")
             DialogButtonBox.buttonRole: DialogButtonBox.AcceptRole
         }
         Button {
             text: qsTr("Close")
             DialogButtonBox.buttonRole: DialogButtonBox.DestructiveRole
         }
     }

You can also mix and match normal buttons and standard buttons.

When a button is clicked in the button box, the clicked() signal is emitted for the actual button that is pressed. In addition, the following signals are automatically emitted when a button with the respective role(s) is pressed:

Role | Signal
--- | ---
`AcceptRole`, `YesRole` | accepted()
`ApplyRole` | applied()
`DiscardRole` | discarded()
`HelpRole` | helpRequested()
`RejectRole`, `NoRole` | rejected()
`ResetRole` | reset()

See also Dialog.

## Property Documentation

alignment : flags

This property holds the alignment of the buttons.

Possible values:

Constant | Description
--- | ---
`undefined` | The buttons are resized to fill the available space.
`Qt.AlignLeft` | The buttons are aligned to the left.
`Qt.AlignHCenter` | The buttons are horizontally centered.
`Qt.AlignRight` | The buttons are aligned to the right.
`Qt.AlignTop` | The buttons are aligned to the top.
`Qt.AlignVCenter` | The buttons are vertically centered.
`Qt.AlignBottom` | The buttons are aligned to the bottom.

buttonLayout : enumeration

This property holds the button layout policy to be used when arranging the buttons contained in the button box. The default value is platform-specific.

Available values:

Constant | Description
--- | ---
`DialogButtonBox.WinLayout` | Use a policy appropriate for applications on Windows.
`DialogButtonBox.MacLayout` | Use a policy appropriate for applications on macOS.
`DialogButtonBox.KdeLayout` | Use a policy appropriate for applications on KDE.
`DialogButtonBox.GnomeLayout` | Use a policy appropriate for applications on GNOME.
`DialogButtonBox.AndroidLayout` | Use a policy appropriate for applications on Android.

This property was introduced in QtQuick.Controls 2.5 (Qt 5.12).

delegate : Component

This property holds a delegate for creating standard buttons.

See also standardButtons.

position : enumeration

This property holds the position of the button box.

Note: If the button box is assigned as a header or footer of ApplicationWindow or Page, the appropriate position is set automatically.

Possible values:

Constant | Description
--- | ---
`DialogButtonBox.Header` | The button box is at the top, as a window or page header.
`DialogButtonBox.Footer` | The button box is at the bottom, as a window or page header.

The default value is `Footer`.

See also Dialog::header and Dialog::footer.

standardButtons : enumeration

This property holds a combination of standard buttons that are used by the button box.

     DialogButtonBox {
         standardButtons: DialogButtonBox.Ok | DialogButtonBox.Cancel

         onAccepted: console.log("Ok clicked")
         onRejected: console.log("Cancel clicked")
     }

The buttons will be positioned in the appropriate order for the user's platform.

Possible flags:

Constant | Description
--- | ---
`DialogButtonBox.Ok` | An "OK" button defined with the `AcceptRole`.
`DialogButtonBox.Open` | An "Open" button defined with the `AcceptRole`.
`DialogButtonBox.Save` | A "Save" button defined with the `AcceptRole`.
`DialogButtonBox.Cancel` | A "Cancel" button defined with the `RejectRole`.
`DialogButtonBox.Close` | A "Close" button defined with the `RejectRole`.
`DialogButtonBox.Discard` | A "Discard" or "Don't Save" button, depending on the platform, defined with the `DestructiveRole`.
`DialogButtonBox.Apply` | An "Apply" button defined with the `ApplyRole`.
`DialogButtonBox.Reset` | A "Reset" button defined with the `ResetRole`.
`DialogButtonBox.RestoreDefaults` | A "Restore Defaults" button defined with the `ResetRole`.
`DialogButtonBox.Help` | A "Help" button defined with the `HelpRole`.
`DialogButtonBox.SaveAll` | A "Save All" button defined with the `AcceptRole`.
`DialogButtonBox.Yes` | A "Yes" button defined with the `YesRole`.
`DialogButtonBox.YesToAll` | A "Yes to All" button defined with the `YesRole`.
`DialogButtonBox.No` | A "No" button defined with the `NoRole`.
`DialogButtonBox.NoToAll` | A "No to All" button defined with the `NoRole`.
`DialogButtonBox.Abort` | An "Abort" button defined with the `RejectRole`.
`DialogButtonBox.Retry` | A "Retry" button defined with the `AcceptRole`.
`DialogButtonBox.Ignore` | An "Ignore" button defined with the `AcceptRole`.
`DialogButtonBox.NoButton` | An invalid button.

See also standardButton().

## Attached Property Documentation

[read-only] DialogButtonBox.buttonBox : DialogButtonBox

This attached property holds the button box that manages this button, or `null` if the button is not in a button box.

DialogButtonBox.buttonRole : enumeration

This attached property holds the role of each button in a button box.

     DialogButtonBox {
         Button {
             text: qsTr("Save")
             DialogButtonBox.buttonRole: DialogButtonBox.AcceptRole
         }
         Button {
             text: qsTr("Close")
             DialogButtonBox.buttonRole: DialogButtonBox.DestructiveRole
         }
     }

Available values:

Constant | Description
--- | ---
`DialogButtonBox.InvalidRole` | The button is invalid.
`DialogButtonBox.AcceptRole` | Clicking the button causes the dialog to be accepted (e.g. OK).
`DialogButtonBox.RejectRole` | Clicking the button causes the dialog to be rejected (e.g. Cancel).
`DialogButtonBox.DestructiveRole` | Clicking the button causes a destructive change (e.g. for discarding changes) and closes the dialog.
`DialogButtonBox.ActionRole` | Clicking the button causes changes to the elements within the dialog.
`DialogButtonBox.HelpRole` | The button can be clicked to request help.
`DialogButtonBox.YesRole` | The button is a "Yes"-like button.
`DialogButtonBox.NoRole` | The button is a "No"-like button.
`DialogButtonBox.ResetRole` | The button resets the dialog's fields to default values.
`DialogButtonBox.ApplyRole` | The button applies current changes.

## Signal Documentation

accepted()

This signal is emitted when a button defined with the `AcceptRole` or `YesRole` is clicked.

Note: The corresponding handler is `onAccepted`.

See also rejected(), clicked(), and helpRequested().

applied()

This signal is emitted when a button defined with the `ApplyRole` is clicked.

Note: The corresponding handler is `onApplied`.

This signal was introduced in QtQuick.Controls 2.3 (Qt 5.10).

See also discarded() and reset().

clicked(AbstractButton button)

This signal is emitted when a button inside the button box is clicked.

Note: The corresponding handler is `onClicked`.

See also accepted(), rejected(), and helpRequested().

discarded()

This signal is emitted when a button defined with the `DiscardRole` is clicked.

Note: The corresponding handler is `onDiscarded`.

This signal was introduced in QtQuick.Controls 2.3 (Qt 5.10).

See also reset() and applied().

helpRequested()

This signal is emitted when a button defined with the `HelpRole` is clicked.

Note: The corresponding handler is `onHelpRequested`.

See also accepted(), rejected(), and clicked().

rejected()

This signal is emitted when a button defined with the `RejectRole` or `NoRole` is clicked.

Note: The corresponding handler is `onRejected`.

See also accepted(), helpRequested(), and clicked().

reset()

This signal is emitted when a button defined with the `ResetRole` is clicked.

Note: The corresponding handler is `onReset`.

This signal was introduced in QtQuick.Controls 2.3 (Qt 5.10).

See also discarded() and applied().

## Method Documentation

AbstractButton standardButton(StandardButton button)

Returns the specified standard button, or `null` if it does not exist.

See also standardButtons.