Action.js
资源名称:ext-3.0.0.zip [点击查看]
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上传日期:2018-01-28
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源码类别:
中间件编程
开发平台:
JavaScript
- /*! * Ext JS Library 3.0.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.extjs.com/license */ /**
- * @class Ext.Action
- * <p>An Action is a piece of reusable functionality that can be abstracted out of any particular component so that it
- * can be usefully shared among multiple components. Actions let you share handlers, configuration options and UI
- * updates across any components that support the Action interface (primarily {@link Ext.Toolbar}, {@link Ext.Button}
- * and {@link Ext.menu.Menu} components).</p>
- * <p>Aside from supporting the config object interface, any component that needs to use Actions must also support
- * the following method list, as these will be called as needed by the Action class: setText(string), setIconCls(string),
- * setDisabled(boolean), setVisible(boolean) and setHandler(function).</p>
- * Example usage:<br>
- * <pre><code>
- // Define the shared action. Each component below will have the same
- // display text and icon, and will display the same message on click.
- var action = new Ext.Action({
- {@link #text}: 'Do something',
- {@link #handler}: function(){
- Ext.Msg.alert('Click', 'You did something.');
- },
- {@link #iconCls}: 'do-something',
- {@link #itemId}: 'myAction'
- });
- var panel = new Ext.Panel({
- title: 'Actions',
- width: 500,
- height: 300,
- tbar: [
- // Add the action directly to a toolbar as a menu button
- action,
- {
- text: 'Action Menu',
- // Add the action to a menu as a text item
- menu: [action]
- }
- ],
- items: [
- // Add the action to the panel body as a standard button
- new Ext.Button(action)
- ],
- renderTo: Ext.getBody()
- });
- // Change the text for all components using the action
- action.setText('Something else');
- // Reference an action through a container using the itemId
- var btn = panel.getComponent('myAction');
- var aRef = btn.baseAction;
- aRef.setText('New text');
- </code></pre>
- * @constructor
- * @param {Object} config The configuration options
- */
- Ext.Action = function(config){
- this.initialConfig = config;
- this.itemId = config.itemId = (config.itemId || config.id || Ext.id());
- this.items = [];
- }
- Ext.Action.prototype = {
- /**
- * @cfg {String} text The text to set for all components using this action (defaults to '').
- */
- /**
- * @cfg {String} iconCls
- * The CSS class selector that specifies a background image to be used as the header icon for
- * all components using this action (defaults to '').
- * <p>An example of specifying a custom icon class would be something like:
- * </p><pre><code>
- // specify the property in the config for the class:
- ...
- iconCls: 'do-something'
- // css class that specifies background image to be used as the icon image:
- .do-something { background-image: url(../images/my-icon.gif) 0 6px no-repeat !important; }
- </code></pre>
- */
- /**
- * @cfg {Boolean} disabled True to disable all components using this action, false to enable them (defaults to false).
- */
- /**
- * @cfg {Boolean} hidden True to hide all components using this action, false to show them (defaults to false).
- */
- /**
- * @cfg {Function} handler The function that will be invoked by each component tied to this action
- * when the component's primary event is triggered (defaults to undefined).
- */
- /**
- * @cfg {String} itemId
- * See {@link Ext.Component}.{@link Ext.Component#itemId itemId}.
- */
- /**
- * @cfg {Object} scope The scope in which the {@link #handler} function will execute.
- */
- // private
- isAction : true,
- /**
- * Sets the text to be displayed by all components using this action.
- * @param {String} text The text to display
- */
- setText : function(text){
- this.initialConfig.text = text;
- this.callEach('setText', [text]);
- },
- /**
- * Gets the text currently displayed by all components using this action.
- */
- getText : function(){
- return this.initialConfig.text;
- },
- /**
- * Sets the icon CSS class for all components using this action. The class should supply
- * a background image that will be used as the icon image.
- * @param {String} cls The CSS class supplying the icon image
- */
- setIconClass : function(cls){
- this.initialConfig.iconCls = cls;
- this.callEach('setIconClass', [cls]);
- },
- /**
- * Gets the icon CSS class currently used by all components using this action.
- */
- getIconClass : function(){
- return this.initialConfig.iconCls;
- },
- /**
- * Sets the disabled state of all components using this action. Shortcut method
- * for {@link #enable} and {@link #disable}.
- * @param {Boolean} disabled True to disable the component, false to enable it
- */
- setDisabled : function(v){
- this.initialConfig.disabled = v;
- this.callEach('setDisabled', [v]);
- },
- /**
- * Enables all components using this action.
- */
- enable : function(){
- this.setDisabled(false);
- },
- /**
- * Disables all components using this action.
- */
- disable : function(){
- this.setDisabled(true);
- },
- /**
- * Returns true if the components using this action are currently disabled, else returns false.
- */
- isDisabled : function(){
- return this.initialConfig.disabled;
- },
- /**
- * Sets the hidden state of all components using this action. Shortcut method
- * for <code>{@link #hide}</code> and <code>{@link #show}</code>.
- * @param {Boolean} hidden True to hide the component, false to show it
- */
- setHidden : function(v){
- this.initialConfig.hidden = v;
- this.callEach('setVisible', [!v]);
- },
- /**
- * Shows all components using this action.
- */
- show : function(){
- this.setHidden(false);
- },
- /**
- * Hides all components using this action.
- */
- hide : function(){
- this.setHidden(true);
- },
- /**
- * Returns true if the components using this action are currently hidden, else returns false.
- */
- isHidden : function(){
- return this.initialConfig.hidden;
- },
- /**
- * Sets the function that will be called by each component using this action when its primary event is triggered.
- * @param {Function} fn The function that will be invoked by the action's components. The function
- * will be called with no arguments.
- * @param {Object} scope The scope in which the function will execute
- */
- setHandler : function(fn, scope){
- this.initialConfig.handler = fn;
- this.initialConfig.scope = scope;
- this.callEach('setHandler', [fn, scope]);
- },
- /**
- * Executes the specified function once for each component currently tied to this action. The function passed
- * in should accept a single argument that will be an object that supports the basic Action config/method interface.
- * @param {Function} fn The function to execute for each component
- * @param {Object} scope The scope in which the function will execute
- */
- each : function(fn, scope){
- Ext.each(this.items, fn, scope);
- },
- // private
- callEach : function(fnName, args){
- var cs = this.items;
- for(var i = 0, len = cs.length; i < len; i++){
- cs[i][fnName].apply(cs[i], args);
- }
- },
- // private
- addComponent : function(comp){
- this.items.push(comp);
- comp.on('destroy', this.removeComponent, this);
- },
- // private
- removeComponent : function(comp){
- this.items.remove(comp);
- },
- /**
- * Executes this action manually using the handler function specified in the original config object
- * or the handler function set with <code>{@link #setHandler}</code>. Any arguments passed to this
- * function will be passed on to the handler function.
- * @param {Mixed} arg1 (optional) Variable number of arguments passed to the handler function
- * @param {Mixed} arg2 (optional)
- * @param {Mixed} etc... (optional)
- */
- execute : function(){
- this.initialConfig.handler.apply(this.initialConfig.scope || window, arguments);
- }
- };