MessageDialog QML Type

A message dialog. 更多...

import 语句：	import QtQuick.Dialogs
Since:	Qt 6.3
继承：	Dialog

所有成员列表，包括继承成员

特性

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

信号

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

详细描述

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 以向用户发出状况警报，情报文本以进一步阐述警报或向用户询问问题，和可选细节文本 to provide even more data if the user requests it. A message box can also display a configurable set of buttons 为接受用户响应。

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."
}

用户必须点击 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 情报文本 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()
}

可用性

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.

特性文档编制

buttons : flags

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

Possible flags:

常量	描述
`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.

另请参阅 buttonClicked ().

detailedText : string

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

另请参阅 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.

另请参阅 text and detailedText .

text : string

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

另请参阅 informativeText and detailedText .

信号文档编制

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

This signal is emitted when a button 采用指定 role 被点击。

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;
        }
    }
}

注意： 相应处理程序是 onButtonClicked .

另请参阅 buttons .