内容

• 特性
• 信号
• 方法
• 详细描述

Dialog QML Type

A generic QtQuick dialog wrapper with standard buttons. 更多...

import 语句：	import QtQuick.Dialogs 1.3
Since:	Qt 5.3

• 所有成员列表，包括继承成员

特性

• clickedButton : StandardButton
• contentItem : QObject
• modality : Qt::WindowModality
• standardButtons : StandardButtons
• title : string
• visible : bool

信号

• accepted ()
• actionChosen (var action )
• apply ()
• discard ()
• help ()
• no ()
• rejected ()
• reset ()
• yes ()

方法

• void close ()
• void open ()

详细描述

The purpose of Dialog is to wrap arbitrary content into a dialog window including a row of platform-tailored buttons.

The contentItem is the default property (the only allowed child element), and items declared inside the Dialog will actually be children of another Item inside the contentItem . The row of standardButtons will also be inside contentItem below the declared content, and Dialog will attempt to size itself to fit the content and the buttons.

Alternatively it is possible to bind contentItem to a custom Item, in which case there will be no buttons, no margins, and the custom content will fill the whole dialog. This is much like creating a Window , except that on platforms which do not support showing multiple windows, the window borders will be simulated and it will be shown in same scene.

注意： do not attempt to bind the width or height of the dialog to the width or height of its content, because Dialog already tries to size itself to the content. If your goal is to change or eliminate the margins, you must override contentItem . If your goal is simply to show a window (whether modal or not), and your platform supports it, it is simpler to use Window 代替。

特性文档编制

clickedButton : StandardButton

This property holds the button pressed by the user. Its value is one of the flags set for the standardButtons 特性。

contentItem : QObject

The QML object which implements the dialog contents. Should be an Item .

For example the following dialog will show custom content and no buttons:

import QtQuick 2.3
import QtQuick.Controls 1.2
import QtQuick.Dialogs 1.2
Dialog {
    visible: true
    title: "Blue sky dialog"
    contentItem: Rectangle {
        color: "lightskyblue"
        implicitWidth: 400
        implicitHeight: 100
        Text {
            text: "Hello blue sky!"
            color: "navy"
            anchors.centerIn: parent
        }
    }
}
							

modality : Qt::WindowModality

Whether the dialog should be shown modal with respect to the window containing the dialog's parent Item, modal with respect to the whole application, or non-modal.

By default it is Qt.WindowModal .

Modality does not mean that there are any blocking calls to wait for the dialog to be accepted or rejected: only that the user will be prevented from interacting with the parent window or the application windows until the dialog is dismissed.

standardButtons : StandardButtons

Dialog has a row of buttons along the bottom, each of which has a ButtonRole that determines which signal will be emitted when the button is pressed. You can also find out which specific button was pressed after the fact via the clickedButton property. You can control which buttons are available by setting standardButtons to a bitwise-or combination of the following flags:

常量	描述
StandardButton.Ok	An OK button defined with the AcceptRole .
StandardButton.Open	An 打开 button defined with the AcceptRole .
StandardButton.Save	A Save button defined with the AcceptRole .
StandardButton.Cancel	A Cancel button defined with the RejectRole .
StandardButton.Close	A Close button defined with the RejectRole .
StandardButton.Discard	A Discard or Don't Save button, depending on the platform, defined with the DestructiveRole .
StandardButton.Apply	An Apply button defined with the ApplyRole .
StandardButton.Reset	A Reset button defined with the ResetRole .
StandardButton.RestoreDefaults	A Restore Defaults button defined with the ResetRole .
StandardButton.Help	A 帮助 button defined with the HelpRole .
StandardButton.SaveAll	A Save All button defined with the AcceptRole .
StandardButton.Yes	A Yes button defined with the YesRole .
StandardButton.YesToAll	A Yes to All button defined with the YesRole .
StandardButton.No	A No button defined with the NoRole .
StandardButton.NoToAll	A No to All button defined with the NoRole .
StandardButton.Abort	An Abort button defined with the RejectRole .
StandardButton.Retry	A Retry button defined with the AcceptRole .
StandardButton.Ignore	An Ignore button defined with the AcceptRole .

For example the following dialog will show a calendar with the ability to save or cancel a date:

import QtQuick 2.3
import QtQuick.Controls 1.2
import QtQuick.Dialogs 1.2
Dialog {
    id: dateDialog
    visible: true
    title: "Choose a date"
    standardButtons: StandardButton.Save | StandardButton.Cancel
    onAccepted: console.log("Saving the date " +
        calendar.selectedDate.toLocaleDateString())
    Calendar {
        id: calendar
        onDoubleClicked: dateDialog.click(StandardButton.Save)
    }
}
									

默认为 StandardButton.Ok .

The enum values are the same as in QMessageBox::StandardButtons .

title : string

The title of the dialog window.

visible : bool

This property holds whether the dialog is visible. By default this is false .

另请参阅 modality .

信号文档编制

accepted ()

This signal is emitted when the user has pressed any button which has the AcceptRole : OK , 打开 , Save , Save All , Retry or Ignore .

相应处理程序是 onAccepted .

actionChosen ( var action )

This signal is emitted when the user has pressed any button or a key associated with some role (such as the Enter or Escape keys). The action parameter carries information about the event:

• StandardButton button - The role of the button which was pressed. If a key was pressed instead, this will be StandardButton.Ok if accepted and StandardButton.Cancel if rejected.
• Qt.Key key - The key which was pressed, or 0 if none
• bool accepted - Set this to false to stop the event from triggering its predefined action

By handling this signal and setting the action.accepted field to false , it's possible to implement some validation on the dialog contents before accepting it, for example.

相应处理程序是 onActionChosen .

This signal was introduced in QtQuick.Controls 1.8.

apply ()

This signal is emitted when the user has pressed the Apply button.

相应处理程序是 onApply .

discard ()

This signal is emitted when the user has pressed the Discard button.

相应处理程序是 onDiscard .

help ()

This signal is emitted when the user has pressed the 帮助 button. Depending on platform, the dialog may not be automatically dismissed because the help that your application provides may need to be relevant to the text shown in this dialog in order to assist the user in making a decision. However on other platforms it's not possible to show a dialog and a help window at the same time. If you want to be sure that the dialog will close, you can set visible to false in your handler.

相应处理程序是 onHelp .

no ()

This signal is emitted when the user has pressed any button which has the NoRole : No or No to All .

相应处理程序是 onNo .

rejected ()

This signal is emitted when the user has dismissed the dialog, by closing the dialog window, by pressing a Cancel , Close or Abort button on the dialog, or by pressing the back button or the escape key.

相应处理程序是 onRejected .

reset ()

This signal is emitted when the user has pressed any button which has the ResetRole : Reset or Restore Defaults .

相应处理程序是 onReset .

yes ()

This signal is emitted when the user has pressed any button which has the YesRole : Yes or Yes to All .

相应处理程序是 onYes .

方法文档编制

void close ()

Closes the dialog.

void open ()

Shows the dialog to the user. It is equivalent to setting visible to true .