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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: 'You 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
| Msg : Object Shorthand for Ext.MessageBox | 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
| minPromptWidth : Number The minimum width in pixels of the message box if it is a prompt dialog. This is useful for setting a different mini... The minimum width in pixels of the message box if it is a prompt 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 (`this` reference) in which the callback is executed. Defaults to the browser wnidow. 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 (`this` reference) in which the callback is executed. Defaults to the browser wnidow. 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 (optional) 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`], [`String value`] ) : 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 (`this` reference) in which the callback is executed. Defaults to the browser wnidow. `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) `value` : String (optional) Default value of the text input element (defaults to '') 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. This method must be called before the MessageBox is shown. 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. Parameters: `config` : Object The following config options are supported: 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's container 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 which is called when the dialog is dismissed either by clicking on the configured buttons, or on the dialog close button, or by pressing the return button to enter input. 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. Parameters passed: buttonId : String The ID of the button pressed, one of: `ok` `yes` `no` `cancel` text : String Value of the input field if either `prompt` or `multiline` is true opt : Object The config object passed to show. scope : Object The scope of the callback function icon : String A CSS class that provides a background image to be used as the body icon for the dialog (e.g. Ext.MessageBox.WARNING or 'custom-class') (defaults to '') iconCls : String The standard Ext.Window.iconCls to add an optional header icon (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 '&#160;') 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.MessageBox.INFO
      });
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.Messag... Updates a progress-style message box's text and progress bar. Only relevant on message boxes initiated via Ext.MessageBox.progress or Ext.MessageBox.wait, 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.