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.Toolbar}, {@link Ext.button.Button} + * and {@link Ext.menu.Menu} components).
+ *Use a single Action instance as the config object for any number of UI Components which share the same configuration. The + * Action not only supplies the configuration, but allows all Components based upon it to have a common set of methods + * called at once through a single call to the Action.
+ *Any Component that is to be configured with an Action must also support + * the following methods:
setText(string)setIconCls(string)setDisabled(boolean)setVisible(boolean)setHandler(function)This allows the Action to control its associated Components.
+ * Example usage:
+// 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.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.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');
+An example of specifying a custom icon class would be something like: + *
+// 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; }
+this reference) in which the
+ * {@link #handler} is executed. Defaults to the browser window.
+ */
+
+ constructor : function(config){
+ this.initialConfig = config;
+ this.itemId = config.itemId = (config.itemId || config.id || Ext.id());
+ this.items = [];
+ },
+
+ // private
+ isAction : true,
+
+ /**
+ * Sets the text to be displayed by all components configured by 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 configured by this Action.
+ */
+ getText : function(){
+ return this.initialConfig.text;
+ },
+
+ /**
+ * Sets the icon CSS class for all components configured by 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
+ */
+ setIconCls : function(cls){
+ this.initialConfig.iconCls = cls;
+ this.callEach('setIconCls', [cls]);
+ },
+
+ /**
+ * Gets the icon CSS class currently used by all components configured by this Action.
+ */
+ getIconCls : function(){
+ return this.initialConfig.iconCls;
+ },
+
+ /**
+ * Sets the disabled state of all components configured by 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 configured by this Action.
+ */
+ enable : function(){
+ this.setDisabled(false);
+ },
+
+ /**
+ * Disables all components configured by 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 configured by this Action. Shortcut method
+ * for {@link #hide} and {@link #show}.
+ * @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 configured by this Action.
+ */
+ show : function(){
+ this.setHidden(false);
+ },
+
+ /**
+ * Hides all components configured by this Action.
+ */
+ hide : function(){
+ this.setHidden(true);
+ },
+
+ /**
+ * Returns true if the components configured by 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 (this reference) in which the function is executed. Defaults to the Component firing the event.
+ */
+ 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 (this reference) in which the function is executed. Defaults to the Component.
+ */
+ 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 {@link #setHandler}. 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 || Ext.global, arguments);
+ }
+});