Base class for all Ext components. All subclasses of Component can automatically participate in the standard * Ext component lifecycle of creation, rendering and destruction. They also have automatic support for basic hide/show * and enable/disable behavior. Component allows any subclass to be lazy-rendered into any {@link Ext.Container} and * to be automatically registered with the {@link Ext.ComponentMgr} so that it can be referenced at any time via * {@link Ext#getCmp}. All visual widgets that require rendering into a layout should subclass Component (or * {@link Ext.BoxComponent} if managed box model handling is required).
*Every component has a specific xtype, which is its Ext-specific type name, along with methods for checking the * xtype like {@link #getXType} and {@link #isXType}. This is the list of all valid xtypes:
*xtype Class ------------- ------------------ box Ext.BoxComponent button Ext.Button colorpalette Ext.ColorPalette component Ext.Component container Ext.Container cycle Ext.CycleButton dataview Ext.DataView datepicker Ext.DatePicker editor Ext.Editor editorgrid Ext.grid.EditorGridPanel grid Ext.grid.GridPanel paging Ext.PagingToolbar panel Ext.Panel progress Ext.ProgressBar propertygrid Ext.grid.PropertyGrid slider Ext.Slider splitbutton Ext.SplitButton statusbar Ext.StatusBar tabpanel Ext.TabPanel treepanel Ext.tree.TreePanel viewport Ext.Viewport window Ext.Window Toolbar components --------------------------------------- toolbar Ext.Toolbar tbbutton Ext.Toolbar.Button tbfill Ext.Toolbar.Fill tbitem Ext.Toolbar.Item tbseparator Ext.Toolbar.Separator tbspacer Ext.Toolbar.Spacer tbsplit Ext.Toolbar.SplitButton tbtext Ext.Toolbar.TextItem Form components --------------------------------------- form Ext.FormPanel checkbox Ext.form.Checkbox combo Ext.form.ComboBox datefield Ext.form.DateField field Ext.form.Field fieldset Ext.form.FieldSet hidden Ext.form.Hidden htmleditor Ext.form.HtmlEditor label Ext.form.Label numberfield Ext.form.NumberField radio Ext.form.Radio textarea Ext.form.TextArea textfield Ext.form.TextField timefield Ext.form.TimeField trigger Ext.form.TriggerField* @constructor * @param {Ext.Element/String/Object} config The configuration options. If an element is passed, it is set as the internal * element and its id used as the component id. If a string is passed, it is assumed to be the id of an existing element * and is used as the component id. Otherwise, it is assumed to be a standard config object and is applied to the component. */ Ext.Component = function(config){ config = config || {}; if(config.initialConfig){ if(config.isAction){ // actions this.baseAction = config; } config = config.initialConfig; // component cloning / action set up }else if(config.tagName || config.dom || typeof config == "string"){ // element object config = {applyTo: config, id: config.id || config}; } /** * This Component's initial configuration specification. Read-only. * @type Object * @property initialConfig */ this.initialConfig = config; Ext.apply(this, config); this.addEvents( /** * @event disable * Fires after the component is disabled. * @param {Ext.Component} this */ 'disable', /** * @event enable * Fires after the component is enabled. * @param {Ext.Component} this */ 'enable', /** * @event beforeshow * Fires before the component is shown. Return false to stop the show. * @param {Ext.Component} this */ 'beforeshow', /** * @event show * Fires after the component is shown. * @param {Ext.Component} this */ 'show', /** * @event beforehide * Fires before the component is hidden. Return false to stop the hide. * @param {Ext.Component} this */ 'beforehide', /** * @event hide * Fires after the component is hidden. * @param {Ext.Component} this */ 'hide', /** * @event beforerender * Fires before the component is rendered. Return false to stop the render. * @param {Ext.Component} this */ 'beforerender', /** * @event render * Fires after the component is rendered. * @param {Ext.Component} this */ 'render', /** * @event beforedestroy * Fires before the component is destroyed. Return false to stop the destroy. * @param {Ext.Component} this */ 'beforedestroy', /** * @event destroy * Fires after the component is destroyed. * @param {Ext.Component} this */ 'destroy', /** * @event beforestaterestore * Fires before the state of the component is restored. Return false to stop the restore. * @param {Ext.Component} this * @param {Object} state The hash of state values */ 'beforestaterestore', /** * @event staterestore * Fires after the state of the component is restored. * @param {Ext.Component} this * @param {Object} state The hash of state values */ 'staterestore', /** * @event beforestatesave * Fires before the state of the component is saved to the configured state provider. Return false to stop the save. * @param {Ext.Component} this * @param {Object} state The hash of state values */ 'beforestatesave', /** * @event statesave * Fires after the state of the component is saved to the configured state provider. * @param {Ext.Component} this * @param {Object} state The hash of state values */ 'statesave' ); this.getId(); Ext.ComponentMgr.register(this); Ext.Component.superclass.constructor.call(this); if(this.baseAction){ this.baseAction.addComponent(this); } this.initComponent(); if(this.plugins){ if(Ext.isArray(this.plugins)){ for(var i = 0, len = this.plugins.length; i < len; i++){ this.plugins[i] = this.initPlugin(this.plugins[i]); } }else{ this.plugins = this.initPlugin(this.plugins); } } if(this.stateful !== false){ this.initState(config); } if(this.applyTo){ this.applyToMarkup(this.applyTo); delete this.applyTo; }else if(this.renderTo){ this.render(this.renderTo); delete this.renderTo; } }; // private Ext.Component.AUTO_ID = 1000; Ext.extend(Ext.Component, Ext.util.Observable, { /** * @cfg {String} id * The unique id of this component (defaults to an auto-assigned id). */ /** * @cfg {String/Object} autoEl * A tag name or DomHelper spec to create an element with. This is intended to create shorthand * utility components inline via JSON. It should not be used for higher level components which already create * their own elements. Example usage: *
{xtype:'box', autoEl: 'div', cls:'my-class'}
{xtype:'box', autoEl: {tag:'blockquote', html:'autoEl is cool!'}} // with DomHelper
* For state saving to work, the state manager's provider must have been set to an implementation * of {@link Ext.state.Provider} which overrides the {@link Ext.state.Provider#set set} * and {@link Ext.state.Provider#get get} methods to save and recall name/value pairs. * A built-in implementation, {@link Ext.state.CookieProvider} is available.
*To set the state provider for the current page:
*
Ext.state.Manager.setProvider(new Ext.state.CookieProvider());
Components attempt to save state when one of the events listed in the {@link #stateEvents} * configuration fires.
*You can perform extra processing on state save and restore by attaching handlers to the * {@link #beforestaterestore}, {@link staterestore}, {@link beforestatesave} and {@link statesave} events
*/ /** * @cfg {String} stateId * The unique id for this component to use for state management purposes (defaults to the component id). *See {@link #stateful} for an explanation of saving and restoring Component state.
*/ /* //internal - to be set by subclasses * @cfg {Array} stateEvents * An array of events that, when fired, should trigger this component to save its state (defaults to none). * These can be any types of events supported by this component, including browser or custom events (e.g., * ['click', 'customerchange']). *See {@link #stateful} for an explanation of saving and restoring Component state.
*/ /** * @cfg {String} disabledClass * CSS class added to the component when it is disabled (defaults to "x-item-disabled"). */ disabledClass : "x-item-disabled", /** * @cfg {Boolean} allowDomMove * Whether the component can move the Dom node when rendering (defaults to true). */ allowDomMove : true, /** * @cfg {Boolean} autoShow * True if the component should check for hidden classes (e.g. 'x-hidden' or 'x-hide-display') and remove * them on render (defaults to false). */ autoShow : false, /** * @cfg {String} hideMode * How this component should hidden. Supported values are "visibility" (css visibility), "offsets" (negative * offset position) and "display" (css display) - defaults to "display". */ hideMode: 'display', /** * @cfg {Boolean} hideParent * True to hide and show the component's container when hide/show is called on the component, false to hide * and show the component itself (defaults to false). For example, this can be used as a shortcut for a hide * button on a window by setting hide:true on the button when adding it to its parent container. */ hideParent: false, /** * The component's owner {@link Ext.Container} (defaults to undefined, and is set automatically when * the component is added to a container). Read-only. * @type Ext.Container * @property ownerCt */ /** * True if this component is hidden. Read-only. * @type Boolean * @property */ hidden : false, /** * True if this component is disabled. Read-only. * @type Boolean * @property */ disabled : false, /** * True if this component has been rendered. Read-only. * @type Boolean * @property */ rendered : false, // private ctype : "Ext.Component", // private actionMode : "el", // private getActionEl : function(){ return this[this.actionMode]; }, initPlugin : function(p){ p.init(this); return p; }, /* // protected * Function to be implemented by Component subclasses to be part of standard component initialization flow (it is empty by default). *
// Traditional constructor:
Ext.Foo = function(config){
// call superclass constructor:
Ext.Foo.superclass.constructor.call(this, config);
this.addEvents({
// add events
});
};
Ext.extend(Ext.Foo, Ext.Bar, {
// class body
}
// initComponent replaces the constructor:
Ext.Foo = Ext.extend(Ext.Bar, {
initComponent : function(){
// call superclass initComponent
Ext.Container.superclass.initComponent.call(this);
this.addEvents({
// add events
});
}
}
Render this Components into the passed HTML element.
*If you are using a {@link Ext.Container Container} object to house this Component, then * do not use the render method.
*A Container's child Components are rendered by that Container's * {@link Ext.Container#layout layout} manager when the Container is first rendered.
*Certain layout managers allow dynamic addition of child components. Those that do * include {@link Ext.layout.CardLayout}, {@link Ext.layout.AnchorLayout}, * {@link Ext.layout.FormLayout}, {@link Ext.layout.TableLayout}.
*If the Container is already rendered when a new child Component is added, you may need to call * the Container's {@link Ext.Container#doLayout doLayout} to refresh the view which causes any * unrendered child Components to be rendered. This is required so that you can add multiple * child components if needed while only refreshing the layout once.
*When creating complex UIs, it is important to remember that sizing and positioning * of child items is the responsibility of the Container's {@link Ext.Container#layout layout} manager. * If you expect child items to be sized in response to user interactions, you must * configure the Container with a layout manager which creates and manages the type of layout you * have in mind.
*Omitting the Container's {@link Ext.Container#layout layout} config means that a basic * layout manager is used which does nothnig but render child components sequentially into the * Container. No sizing or positioning will be performed in this situation.
* @param {Element/HTMLElement/String} container (optional) The element this Component should be * rendered into. If it is being created from existing markup, this should be omitted. * @param {String/Number} position (optional) The element ID or DOM node index within the container before * which this component will be inserted (defaults to appending to the end of the container) */ render : function(container, position){ if(!this.rendered && this.fireEvent("beforerender", this) !== false){ if(!container && this.el){ this.el = Ext.get(this.el); container = this.el.dom.parentNode; this.allowDomMove = false; } this.container = Ext.get(container); if(this.ctCls){ this.container.addClass(this.ctCls); } this.rendered = true; if(position !== undefined){ if(typeof position == 'number'){ position = this.container.dom.childNodes[position]; }else{ position = Ext.getDom(position); } } this.onRender(this.container, position || null); if(this.autoShow){ this.el.removeClass(['x-hidden','x-hide-' + this.hideMode]); } if(this.cls){ this.el.addClass(this.cls); delete this.cls; } if(this.style){ this.el.applyStyles(this.style); delete this.style; } this.fireEvent("render", this); this.afterRender(this.container); if(this.hidden){ this.hide(); } if(this.disabled){ this.disable(); } if(this.stateful !== false){ this.initStateEvents(); } } return this; }, // private initState : function(config){ if(Ext.state.Manager){ var state = Ext.state.Manager.get(this.stateId || this.id); if(state){ if(this.fireEvent('beforestaterestore', this, state) !== false){ this.applyState(state); this.fireEvent('staterestore', this, state); } } } }, // private initStateEvents : function(){ if(this.stateEvents){ for(var i = 0, e; e = this.stateEvents[i]; i++){ this.on(e, this.saveState, this, {delay:100}); } } }, // private applyState : function(state, config){ if(state){ Ext.apply(this, state); } }, // private getState : function(){ return null; }, // private saveState : function(){ if(Ext.state.Manager){ var state = this.getState(); if(this.fireEvent('beforestatesave', this, state) !== false){ Ext.state.Manager.set(this.stateId || this.id, state); this.fireEvent('statesave', this, state); } } }, /** * Apply this component to existing markup that is valid. With this function, no call to render() is required. * @param {String/HTMLElement} el */ applyToMarkup : function(el){ this.allowDomMove = false; this.el = Ext.get(el); this.render(this.el.dom.parentNode); }, /** * Adds a CSS class to the component's underlying element. * @param {string} cls The CSS class name to add */ addClass : function(cls){ if(this.el){ this.el.addClass(cls); }else{ this.cls = this.cls ? this.cls + ' ' + cls : cls; } }, /** * Removes a CSS class from the component's underlying element. * @param {string} cls The CSS class name to remove */ removeClass : function(cls){ if(this.el){ this.el.removeClass(cls); }else if(this.cls){ this.cls = this.cls.split(' ').remove(cls).join(' '); } }, // private // default function is not really useful onRender : function(ct, position){ if(this.autoEl){ if(typeof this.autoEl == 'string'){ this.el = document.createElement(this.autoEl); }else{ var div = document.createElement('div'); Ext.DomHelper.overwrite(div, this.autoEl); this.el = div.firstChild; } if (!this.el.id) { this.el.id = this.getId(); } } if(this.el){ this.el = Ext.get(this.el); if(this.allowDomMove !== false){ ct.dom.insertBefore(this.el.dom, position); } if(this.overCls) { this.el.addClassOnOver(this.overCls); } } }, // private getAutoCreate : function(){ var cfg = typeof this.autoCreate == "object" ? this.autoCreate : Ext.apply({}, this.defaultAutoCreate); if(this.id && !cfg.id){ cfg.id = this.id; } return cfg; }, // private afterRender : Ext.emptyFn, /** * Destroys this component by purging any event listeners, removing the component's element from the DOM, * removing the component from its {@link Ext.Container} (if applicable) and unregistering it from * {@link Ext.ComponentMgr}. Destruction is generally handled automatically by the framework and this method * should usually not need to be called directly. */ destroy : function(){ if(this.fireEvent("beforedestroy", this) !== false){ this.beforeDestroy(); if(this.rendered){ this.el.removeAllListeners(); this.el.remove(); if(this.actionMode == "container"){ this.container.remove(); } } this.onDestroy(); Ext.ComponentMgr.unregister(this); this.fireEvent("destroy", this); this.purgeListeners(); } }, // private beforeDestroy : Ext.emptyFn, // private onDestroy : Ext.emptyFn, /** * Returns the underlying {@link Ext.Element}. * @return {Ext.Element} The element */ getEl : function(){ return this.el; }, /** * Returns the id of this component. * @return {String} */ getId : function(){ return this.id || (this.id = "ext-comp-" + (++Ext.Component.AUTO_ID)); }, /** * Returns the item id of this component. * @return {String} */ getItemId : function(){ return this.itemId || this.getId(); }, /** * Try to focus this component. * @param {Boolean} selectText (optional) If applicable, true to also select the text in this component * @param {Boolean/Number} delay (optional) Delay the focus this number of milliseconds (true for 10 milliseconds) * @return {Ext.Component} this */ focus : function(selectText, delay){ if(delay){ this.focus.defer(typeof delay == 'number' ? delay : 10, this, [selectText, false]); return; } if(this.rendered){ this.el.focus(); if(selectText === true){ this.el.dom.select(); } } return this; }, // private blur : function(){ if(this.rendered){ this.el.blur(); } return this; }, /** * Disable this component. * @return {Ext.Component} this */ disable : function(){ if(this.rendered){ this.onDisable(); } this.disabled = true; this.fireEvent("disable", this); return this; }, // private onDisable : function(){ this.getActionEl().addClass(this.disabledClass); this.el.dom.disabled = true; }, /** * Enable this component. * @return {Ext.Component} this */ enable : function(){ if(this.rendered){ this.onEnable(); } this.disabled = false; this.fireEvent("enable", this); return this; }, // private onEnable : function(){ this.getActionEl().removeClass(this.disabledClass); this.el.dom.disabled = false; }, /** * Convenience function for setting disabled/enabled by boolean. * @param {Boolean} disabled */ setDisabled : function(disabled){ this[disabled ? "disable" : "enable"](); }, /** * Show this component. * @return {Ext.Component} this */ show: function(){ if(this.fireEvent("beforeshow", this) !== false){ this.hidden = false; if(this.autoRender){ this.render(typeof this.autoRender == 'boolean' ? Ext.getBody() : this.autoRender); } if(this.rendered){ this.onShow(); } this.fireEvent("show", this); } return this; }, // private onShow : function(){ if(this.hideParent){ this.container.removeClass('x-hide-' + this.hideMode); }else{ this.getActionEl().removeClass('x-hide-' + this.hideMode); } }, /** * Hide this component. * @return {Ext.Component} this */ hide: function(){ if(this.fireEvent("beforehide", this) !== false){ this.hidden = true; if(this.rendered){ this.onHide(); } this.fireEvent("hide", this); } return this; }, // private onHide : function(){ if(this.hideParent){ this.container.addClass('x-hide-' + this.hideMode); }else{ this.getActionEl().addClass('x-hide-' + this.hideMode); } }, /** * Convenience function to hide or show this component by boolean. * @param {Boolean} visible True to show, false to hide * @return {Ext.Component} this */ setVisible: function(visible){ if(visible) { this.show(); }else{ this.hide(); } return this; }, /** * Returns true if this component is visible. */ isVisible : function(){ return this.rendered && this.getActionEl().isVisible(); }, /** * Clone the current component using the original config values passed into this instance by default. * @param {Object} overrides A new config containing any properties to override in the cloned version. * An id property can be passed on this object, otherwise one will be generated to avoid duplicates. * @return {Ext.Component} clone The cloned copy of this component */ cloneConfig : function(overrides){ overrides = overrides || {}; var id = overrides.id || Ext.id(); var cfg = Ext.applyIf(overrides, this.initialConfig); cfg.id = id; // prevent dup id return new this.constructor(cfg); }, /** * Gets the xtype for this component as registered with {@link Ext.ComponentMgr}. For a list of all * available xtypes, see the {@link Ext.Component} header. Example usage: *
var t = new Ext.form.TextField();
alert(t.getXType()); // alerts 'textfield'
Tests whether or not this Component is of a specific xtype. This can test whether this Component is descended * from the xtype (default) or whether it is directly of the xtype specified (shallow = true).
*If using your own subclasses, be aware that a Component must register its own xtype * to participate in determination of inherited xtypes.
*For a list of all available xtypes, see the {@link Ext.Component} header.
*Example usage:
*
var t = new Ext.form.TextField();
var isText = t.isXType('textfield'); // true
var isBoxSubclass = t.isXType('box'); // true, descended from BoxComponent
var isBoxInstance = t.isXType('box', true); // false, not a direct BoxComponent instance
Returns this Component's xtype hierarchy as a slash-delimited string. For a list of all * available xtypes, see the {@link Ext.Component} header.
*If using your own subclasses, be aware that a Component must register its own xtype * to participate in determination of inherited xtypes.
*Example usage:
*
var t = new Ext.form.TextField();
alert(t.getXTypes()); // alerts 'component/box/field/textfield'