- Qt 6.9
- Qt Quick Dialogs
- QML Types
- MessageDialog
- Qt 6.9.3 Reference Documentation

# MessageDialog QML Type

A message dialog. More...

Import Statement: | `import QtQuick.Dialogs`
Since: | Qt 6.3
Inherits: | Dialog

- List of all members, including inherited members

## Properties

- buttons : flags
- detailedText : string
- informativeText : string
- text : string

## Signals

- buttonClicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role)

## Detailed Description

The MessageDialog type provides a QML API for message dialogs.

A message dialog is used to inform the user, or ask the user a question. A message dialog displays a primary text to alert the user to a situation, an informative text to further explain the alert or to ask the user a question, and an optional detailed text to provide even more data if the user requests it. A message box can also display a configurable set of buttons for accepting a user response.

To show a message dialog, construct an instance of MessageDialog, set the desired properties, and call open().

     MessageDialog {
         buttons: MessageDialog.Ok
         text: "The document has been modified."
     }

The user must click the OK button to dismiss the message dialog.

A more elaborate approach than just alerting the user to an event is to also ask the user what to do about it. Store the question in the informative text property, and specify the buttons property to the set of buttons you want as the set of user responses. The buttons are specified by combining values using the bitwise OR operator.

     MessageDialog {
         text: "The document has been modified."
         informativeText: "Do you want to save your changes?"
         buttons: MessageDialog.Ok | MessageDialog.Cancel

         onAccepted: document.save()
     }

### Availability

A native platform message dialog is currently available on the following platforms:

- Android
- iOS
- macOS

Qt Quick Dialogs uses a Qt Quick implementation as a fallback on platforms that do not have a native implementation available.

## Property Documentation

buttons : flags

This property holds a combination of buttons that are used by the message dialog. The default value is `MessageDialog.NoButton`.

Possible flags:

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

See also buttonClicked().

detailedText : string

This property holds the text to be displayed in the details area.

See also text and informativeText.

informativeText : string

This property holds the informative text that provides a fuller description for the message.

Informative text can be used to expand upon the text to give more information to the user.

See also text and detailedText.

text : string

This property holds the text to be displayed on the message dialog.

See also informativeText and detailedText.

## Signal Documentation

buttonClicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role)

This signal is emitted when a button with the specified role is clicked.

By giving this signal a handler, you can respond to any custom button being pressed. The button argument tells which button was clicked, while the role argument tells the functional role of that button.

     MessageDialog {
         id: dialog
         text: qsTr("The document has been modified.")
         informativeText: qsTr("Do you want to save your changes?")
         buttons: MessageDialog.Ok | MessageDialog.Cancel
         onButtonClicked: function (button, role) {
             switch (button) {
             case MessageDialog.Ok:
                 document.save()
                 break;
             }
         }
     }

Note: The corresponding handler is `onButtonClicked`.

See also buttons.