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# Class Ext.MessageBox

Package: | Ext
Defined In: | MessageBox.js
Class: | MessageBox
Extends: | Object

Utility class for generating different styles of message boxes. The alias Ext.Msg can also be used.

Note that the MessageBox is asynchronous. Unlike a regular JavaScript `alert` (which will halt browser execution), showing a MessageBox will not cause the code to stop. For this reason, if you have code that should only run after some user feedback from the MessageBox, you must use a callback function (see the `function` parameter for show for more details).

Example usage:

    // Basic alert:
    Ext.Msg.alert('Status', 'Changes saved successfully.');

    // Prompt for user data and process the result using a callback:
    Ext.Msg.prompt('Name', 'Please enter your name:', function(btn, text){
        if (btn == 'ok'){
            // process text value and close...
        }
    });

    // Show a dialog using config options:
    Ext.Msg.show({
       title:'Save Changes?',
       msg: 'Your are closing a tab that has unsaved changes. Would you like to save your changes?',
       buttons: Ext.Msg.YESNOCANCEL,
       fn: processResult,
       animEl: 'elId',
       icon: Ext.MessageBox.QUESTION
    });

This class is a singleton and cannot be created directly.

## Public Properties

Property | Defined By
--- | ---
| CANCEL : Object Button config that displays a single Cancel button | MessageBox
| ERROR : String The CSS class that provides the ERROR icon image | MessageBox
| INFO : String The CSS class that provides the INFO icon image | MessageBox
| OK : Object Button config that displays a single OK button | MessageBox
| OKCANCEL : Object Button config that displays OK and Cancel buttons | MessageBox
| QUESTION : String The CSS class that provides the QUESTION icon image | MessageBox
| WARNING : String The CSS class that provides the WARNING icon image | MessageBox
| YESNO : Object Button config that displays Yes and No buttons | MessageBox
| YESNOCANCEL : Object Button config that displays Yes, No and Cancel buttons | MessageBox
| buttonText : Object An object containing the default button text strings that can be overriden for localized language support. Supported ... An object containing the default button text strings that can be overriden for localized language support. Supported properties are: ok, cancel, yes and no. Generally you should include a locale-specific resource file for handling language support across the framework. Customize the default text like so: Ext.MessageBox.buttonText.yes = "oui"; //french | MessageBox
| defaultTextHeight : Number The default height in pixels of the message box's multiline textarea if displayed (defaults to 75) | MessageBox
| maxWidth : Number The maximum width in pixels of the message box (defaults to 600) | MessageBox
| minProgressWidth : Number The minimum width in pixels of the message box if it is a progress-style dialog. This is useful for setting a differ... The minimum width in pixels of the message box if it is a progress-style dialog. This is useful for setting a different minimum width than text-only dialogs may need (defaults to 250) | MessageBox
| minWidth : Number The minimum width in pixels of the message box (defaults to 100) | MessageBox

## Public Methods

Method | Defined By
--- | ---
| alert( `String title`, `String msg`, [`Function fn`], [`Object scope`] ) : Ext.MessageBox Displays a standard read-only message box with an OK button (comparable to the basic JavaScript alert prompt). If a c... Displays a standard read-only message box with an OK button (comparable to the basic JavaScript alert prompt). If a callback function is passed it will be called after the user clicks the button, and the id of the button that was clicked will be passed as the only parameter to the callback (could also be the top-right close button). Parameters: `title` : String The title bar text `msg` : String The message box body text `fn` : Function (optional) The callback function invoked after the message box is closed `scope` : Object (optional) The scope of the callback function Returns: `Ext.MessageBox` this | MessageBox
| confirm( `String title`, `String msg`, [`Function fn`], [`Object scope`] ) : Ext.MessageBox Displays a confirmation message box with Yes and No buttons (comparable to JavaScript's confirm). If a callback funct... Displays a confirmation message box with Yes and No buttons (comparable to JavaScript's confirm). If a callback function is passed it will be called after the user clicks either button, and the id of the button that was clicked will be passed as the only parameter to the callback (could also be the top-right close button). Parameters: `title` : String The title bar text `msg` : String The message box body text `fn` : Function (optional) The callback function invoked after the message box is closed `scope` : Object (optional) The scope of the callback function Returns: `Ext.MessageBox` this | MessageBox
| getDialog() : Ext.Window Returns a reference to the underlying Ext.Window element Returns a reference to the underlying Ext.Window element Parameters: None. Returns: `Ext.Window` The window | MessageBox
| hide() : Ext.MessageBox Hides the message box if it is displayed Hides the message box if it is displayed Parameters: None. Returns: `Ext.MessageBox` this | MessageBox
| isVisible() : Boolean Returns true if the message box is currently displayed Returns true if the message box is currently displayed Parameters: None. Returns: `Boolean` True if the message box is visible, else false | MessageBox
| progress( `String title`, `String msg`, `String progressText` ) : Ext.MessageBox Displays a message box with a progress bar. This message box has no buttons and is not closeable by the user. You a... Displays a message box with a progress bar. This message box has no buttons and is not closeable by the user. You are responsible for updating the progress bar as needed via Ext.MessageBox.updateProgress and closing the message box when the process is complete. Parameters: `title` : String The title bar text `msg` : String The message box body text `progressText` : String The text to display inside the progress bar (defaults to '') Returns: `Ext.MessageBox` this | MessageBox
| prompt( `String title`, `String msg`, [`Function fn`], [`Object scope`], [`Boolean/Number multiline`] ) : Ext.MessageBox Displays a message box with OK and Cancel buttons prompting the user to enter some text (comparable to JavaScript's p... Displays a message box with OK and Cancel buttons prompting the user to enter some text (comparable to JavaScript's prompt). The prompt can be a single-line or multi-line textbox. If a callback function is passed it will be called after the user clicks either button, and the id of the button that was clicked (could also be the top-right close button) and the text that was entered will be passed as the two parameters to the callback. Parameters: `title` : String The title bar text `msg` : String The message box body text `fn` : Function (optional) The callback function invoked after the message box is closed `scope` : Object (optional) The scope of the callback function `multiline` : Boolean/Number (optional) True to create a multiline textbox using the defaultTextHeight property, or the height in pixels to create the textbox (defaults to false / single-line) Returns: `Ext.MessageBox` this | MessageBox
| setIcon( `String icon` ) : Ext.MessageBox Adds the specified icon to the dialog. By default, the class 'ext-mb-icon' is applied for default styling, and the c... Adds the specified icon to the dialog. By default, the class 'ext-mb-icon' is applied for default styling, and the class passed in is expected to supply the background image url. Pass in empty string ('') to clear any existing icon. The following built-in icon classes are supported, but you can also pass in a custom class name:
    Ext.MessageBox.INFO
    Ext.MessageBox.WARNING
    Ext.MessageBox.QUESTION
    Ext.MessageBox.ERROR
Parameters: `icon` : String A CSS classname specifying the icon's background image url, or empty string to clear the icon Returns: `Ext.MessageBox` this | MessageBox
| show( `Object config` ) : Ext.MessageBox Displays a new message box, or reinitializes an existing message box, based on the config options passed in. All disp... Displays a new message box, or reinitializes an existing message box, based on the config options passed in. All display functions (e.g. prompt, alert, etc.) on MessageBox call this function internally, although those calls are basic shortcuts and do not support all of the config options allowed here. The following config object properties are supported:
    Property          Type             Description
    ----------------  ---------------  -----------------------------------------------------------------------------
    animEl            String/Element   An id or Element from which the message box should animate as it opens and
                                       closes (defaults to undefined)
    buttons           Object/Boolean   A button config object (e.g., Ext.MessageBox.OKCANCEL or {ok:'Foo',
                                       cancel:'Bar'}), or false to not show any buttons (defaults to false)
    closable          Boolean          False to hide the top-right close button (defaults to true).  Note that
                                       progress and wait dialogs will ignore this property and always hide the
                                       close button as they can only be closed programmatically.
    cls               String           A custom CSS class to apply to the message box element
    defaultTextHeight Number           The default height in pixels of the message box's multiline textarea if
                                       displayed (defaults to 75)
    fn                Function         A callback function to execute after closing the dialog.  The arguments to the
                                       function will be btn (the name of the button that was clicked, if applicable,
                                       e.g. "ok"), and text (the value of the active text field, if applicable).
                                       Progress and wait dialogs will ignore this option since they do not respond to
                                       user actions and can only be closed programmatically, so any required function
                                       should be called by the same code after it closes the dialog.
    icon              String           A CSS class that provides a background image to be used as an icon for
                                       the dialog (e.g., Ext.MessageBox.WARNING or 'custom-class', defaults to '')
    maxWidth          Number           The maximum width in pixels of the message box (defaults to 600)
    minWidth          Number           The minimum width in pixels of the message box (defaults to 100)
    modal             Boolean          False to allow user interaction with the page while the message box is
                                       displayed (defaults to true)
    msg               String           A string that will replace the existing message box body text (defaults
                                       to the XHTML-compliant non-breaking space character ' ')
    multiline         Boolean          True to prompt the user to enter multi-line text (defaults to false)
    progress          Boolean          True to display a progress bar (defaults to false)
    progressText      String           The text to display inside the progress bar if progress = true (defaults to '')
    prompt            Boolean          True to prompt the user to enter single-line text (defaults to false)
    proxyDrag         Boolean          True to display a lightweight proxy while dragging (defaults to false)
    title             String           The title text
    value             String           The string value to set into the active textbox element if displayed
    wait              Boolean          True to display a progress bar (defaults to false)
    waitConfig        Object           A Ext.ProgressBar.waitConfig object (applies only if wait = true)
    width             Number           The width of the dialog in pixels
Example usage:
    Ext.Msg.show({
       title: 'Address',
       msg: 'Please enter your address:',
       width: 300,
       buttons: Ext.MessageBox.OKCANCEL,
       multiline: true,
       fn: saveAddress,
       animEl: 'addAddressBtn',
       icon: Ext.MessagBox.INFO
    });
Parameters: `config` : Object Configuration options Returns: `Ext.MessageBox` this | MessageBox
| updateProgress( `Number value`, `String progressText`, `String msg` ) : Ext.MessageBox Updates a progress-style message box's text and progress bar. Only relevant on message boxes initiated via Ext.Messa... Updates a progress-style message box's text and progress bar. Only relevant on message boxes initiated via Ext.MessageBox.progress or by calling Ext.MessageBox.show with progress: true. Parameters: `value` : Number Any number between 0 and 1 (e.g., .5, defaults to 0) `progressText` : String The progress text to display inside the progress bar (defaults to '') `msg` : String The message box's body text is replaced with the specified string (defaults to undefined so that any existing body text will not get overwritten by default unless a new value is passed in) Returns: `Ext.MessageBox` this | MessageBox
| updateText( [`String text`] ) : Ext.MessageBox Updates the message box body text Updates the message box body text Parameters: `text` : String (optional) Replaces the message box element's innerHTML with the specified string (defaults to the XHTML-compliant non-breaking space character '&#160;') Returns: `Ext.MessageBox` this | MessageBox
| wait( `String msg`, [`String title`], [`Object config`] ) : Ext.MessageBox Displays a message box with an infinitely auto-updating progress bar. This can be used to block user interaction whi... Displays a message box with an infinitely auto-updating progress bar. This can be used to block user interaction while waiting for a long-running process to complete that does not have defined intervals. You are responsible for closing the message box when the process is complete. Parameters: `msg` : String The message box body text `title` : String (optional) The title bar text `config` : Object (optional) A Ext.ProgressBar.waitConfig object Returns: `Ext.MessageBox` this | MessageBox

## Public Events

This class has no public events.