www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/widgets/SplitButton.js
/* * Ext JS Library 2.0.2 * Copyright(c) 2006-2008, Ext JS, LLC. * licensing@extjs.com * * http://extjs.com/license */ /** * @class Ext.SplitButton * @extends Ext.Button * A split button that provides a built-in dropdown arrow that can fire an event separately from the default * click event of the button. Typically this would be used to display a dropdown menu that provides additional * options to the primary button action, but any custom handler can provide the arrowclick implementation. Example usage: * <pre><code> // display a dropdown menu: new Ext.SplitButton({ renderTo: 'button-ct', // the container id text: 'Options', handler: optionsHandler, // handle a click on the button itself menu: new Ext.menu.Menu({ items: [ // these items will render as dropdown menu items when the arrow is clicked: {text: 'Item 1', handler: item1Handler}, {text: 'Item 2', handler: item2Handler}, ] }) }); // Instead of showing a menu, you provide any type of custom // functionality you want when the dropdown arrow is clicked: new Ext.SplitButton({ renderTo: 'button-ct', text: 'Options', handler: optionsHandler, arrowHandler: myCustomHandler }); </code></pre> * @cfg {Function} arrowHandler A function called when the arrow button is clicked (can be used instead of click event) * @cfg {String} arrowTooltip The title attribute of the arrow * @constructor * Create a new menu button * @param {Object} config The config object */ Ext.SplitButton = Ext.extend(Ext.Button, { // private arrowSelector : 'button:last', // private initComponent : function(){ Ext.SplitButton.superclass.initComponent.call(this); /** * @event arrowclick * Fires when this button's arrow is clicked * @param {MenuButton} this * @param {EventObject} e The click event */ this.addEvents("arrowclick"); }, // private onRender : function(ct, position){ // this is one sweet looking template! var tpl = new Ext.Template( '<table cellspacing="0" class="x-btn-menu-wrap x-btn"><tr><td>', '<table cellspacing="0" class="x-btn-wrap x-btn-menu-text-wrap"><tbody>', '<tr><td class="x-btn-left"><i> </i></td><td class="x-btn-center"><button class="x-btn-text" type="{1}">{0}</button></td></tr>', "</tbody></table></td><td>", '<table cellspacing="0" class="x-btn-wrap x-btn-menu-arrow-wrap"><tbody>', '<tr><td class="x-btn-center"><button class="x-btn-menu-arrow-el" type="button"> </button></td><td class="x-btn-right"><i> </i></td></tr>', "</tbody></table></td></tr></table>" ); var btn, targs = [this.text || ' ', this.type]; if(position){ btn = tpl.insertBefore(position, targs, true); }else{ btn = tpl.append(ct, targs, true); } var btnEl = btn.child(this.buttonSelector); this.initButtonEl(btn, btnEl); this.arrowBtnTable = btn.child("table:last"); if(this.arrowTooltip){ btn.child(this.arrowSelector).dom[this.tooltipType] = this.arrowTooltip; } }, // private autoWidth : function(){ if(this.el){ var tbl = this.el.child("table:first"); var tbl2 = this.el.child("table:last"); this.el.setWidth("auto"); tbl.setWidth("auto"); if(Ext.isIE7 && Ext.isStrict){ var ib = this.el.child(this.buttonSelector); if(ib && ib.getWidth() > 20){ ib.clip(); ib.setWidth(Ext.util.TextMetrics.measure(ib, this.text).width+ib.getFrameWidth('lr')); } } if(this.minWidth){ if((tbl.getWidth()+tbl2.getWidth()) < this.minWidth){ tbl.setWidth(this.minWidth-tbl2.getWidth()); } } this.el.setWidth(tbl.getWidth()+tbl2.getWidth()); } }, /** * Sets this button's arrow click handler. * @param {Function} handler The function to call when the arrow is clicked * @param {Object} scope (optional) Scope for the function passed above */ setArrowHandler : function(handler, scope){ this.arrowHandler = handler; this.scope = scope; }, // private onClick : function(e){ e.preventDefault(); if(!this.disabled){ if(e.getTarget(".x-btn-menu-arrow-wrap")){ if(this.menu && !this.menu.isVisible() && !this.ignoreNextClick){ this.showMenu(); } this.fireEvent("arrowclick", this, e); if(this.arrowHandler){ this.arrowHandler.call(this.scope || this, this, e); } }else{ if(this.enableToggle){ this.toggle(); } this.fireEvent("click", this, e); if(this.handler){ this.handler.call(this.scope || this, this, e); } } } }, // private getClickEl : function(e, isUp){ if(!isUp){ return (this.lastClickEl = e.getTarget("table", 10, true)); } return this.lastClickEl; }, // private onDisable : function(){ if(this.el){ if(!Ext.isIE6){ this.el.addClass("x-item-disabled"); } this.el.child(this.buttonSelector).dom.disabled = true; this.el.child(this.arrowSelector).dom.disabled = true; } this.disabled = true; }, // private onEnable : function(){ if(this.el){ if(!Ext.isIE6){ this.el.removeClass("x-item-disabled"); } this.el.child(this.buttonSelector).dom.disabled = false; this.el.child(this.arrowSelector).dom.disabled = false; } this.disabled = false; }, // private isMenuTriggerOver : function(e){ return this.menu && e.within(this.arrowBtnTable) && !e.within(this.arrowBtnTable, true); }, // private isMenuTriggerOut : function(e, internal){ return this.menu && !e.within(this.arrowBtnTable); }, // private onDestroy : function(){ Ext.destroy(this.arrowBtnTable); Ext.SplitButton.superclass.onDestroy.call(this); } }); // backwards compat Ext.MenuButton = Ext.SplitButton; Ext.reg('splitbutton', Ext.SplitButton);