button-beta-debug.js

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        /**
        * @method _isActivationKey
        * @description Determines if the specified keycode is one that toggles  
        * the button's "active" state.
        * @protected
        * @param {Number} p_nKeyCode Number representing the keycode to 
        * be evaluated.
        * @return {Boolean}
        */
        _isActivationKey: function (p_nKeyCode) {
        
            var sType = this.get("type"),
                aKeyCodes = (sType == "checkbox" || sType == "radio") ? 
                    this.CHECK_ACTIVATION_KEYS : this.ACTIVATION_KEYS,
        
                nKeyCodes = aKeyCodes.length,
                i;
        
            if (nKeyCodes > 0) {
        
                i = nKeyCodes - 1;
        
                do {
        
                    if (p_nKeyCode == aKeyCodes[i]) {
        
                        return true;
        
                    }
        
                }
                while (i--);
            
            }
        
        },
        
        
        /**
        * @method _isSplitButtonOptionKey
        * @description Determines if the specified keycode is one that toggles  
        * the display of the split button's menu.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        * @return {Boolean}
        */
        _isSplitButtonOptionKey: function (p_oEvent) {
        
            return (p_oEvent.ctrlKey && p_oEvent.shiftKey && 
                Event.getCharCode(p_oEvent) == 77);
        
        },
        
        
        /**
        * @method _addListenersToForm
        * @description Adds event handlers to the button's form.
        * @protected
        */
        _addListenersToForm: function () {
        
            var oForm = this.getForm(),
                oSrcElement,
                aListeners,
                nListeners,
                i,
                bHasKeyPressListener;
        
        
            if (oForm) {
        
                Event.on(oForm, "reset", this._onFormReset, null, this);
                Event.on(oForm, "submit", this.createHiddenFields, null, this);
        
                oSrcElement = this.get("srcelement");
        
        
                if (this.get("type") == "submit" || 
                    (oSrcElement && oSrcElement.type == "submit")) 
                {
                
                    aListeners = Event.getListeners(oForm, "keypress");
                    bHasKeyPressListener = false;
            
                    if (aListeners) {
            
                        nListeners = aListeners.length;
        
                        if (nListeners > 0) {
            
                            i = nListeners - 1;
                            
                            do {
               
                                if (aListeners[i].fn == 
                                    YAHOO.widget.Button.onFormKeyPress) 
                                {
                
                                    bHasKeyPressListener = true;
                                    break;
                                
                                }
                
                            }
                            while (i--);
                        
                        }
                    
                    }
            
            
                    if (!bHasKeyPressListener) {
        
                        Event.on(oForm, "keypress", 
                            YAHOO.widget.Button.onFormKeyPress);
            
                    }
        
                }
            
            }
        
        },
        
        
        _originalMaxHeight: -1,
        
        
        /**
        * @method _showMenu
        * @description Shows the button's menu.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object 
        * passed back by the event utility (YAHOO.util.Event) that triggered 
        * the display of the menu.
        */
        _showMenu: function (p_oEvent) {
        
            YAHOO.widget.MenuManager.hideVisible();
        
            if (m_oOverlayManager) {
        
                m_oOverlayManager.hideAll();
            
            }
        
        
            var oMenu = this._menu,
                nViewportHeight = Dom.getViewportHeight(),
                nMenuHeight,
                nScrollTop,
                nY;
        
        
            if (oMenu && (oMenu instanceof Menu)) {
        
                oMenu.cfg.applyConfig({ context: [this.get("id"), "tl", "bl"],
                    constraintoviewport: false,
                    clicktohide: false,
                    visible: true });
                    
                oMenu.cfg.fireQueue();
            
                oMenu.align("tl", "bl");
        
                /*
                    Stop the propagation of the event so that the MenuManager 
                    doesn't blur the menu after it gets focus.
                */
        
                if (p_oEvent.type == "mousedown") {
        
                    Event.stopPropagation(p_oEvent);
        
                }


                if (this.get("focusmenu")) {
        
                    this._menu.focus();
                
                }
        
                nMenuHeight = oMenu.element.offsetHeight;
        
        
                if ((oMenu.cfg.getProperty("y") + nMenuHeight) > 
                    nViewportHeight) {
        
                    this.logger.log("Current menu position will place a " + 
                        "portion, or the entire menu outside the boundary of " +
                        "the viewport.  Repositioning the menu to stay " +
                        "inside the viewport.");
        
                    oMenu.align("bl", "tl");
        
                    nY = oMenu.cfg.getProperty("y");
        
                    nScrollTop = Dom.getDocumentScrollTop();
        
        
                    if (nScrollTop >= nY) {
        
                        if (this._originalMaxHeight == -1) {
        
                            this._originalMaxHeight = 
                                    oMenu.cfg.getProperty("maxheight");
        
                        }
        
                        oMenu.cfg.setProperty("maxheight", 
                                    (nMenuHeight - ((nScrollTop - nY) + 20)));
        
                        oMenu.align("bl", "tl");
        
                    }
        
                }
        
            }
            else if (oMenu && (oMenu instanceof Overlay)) {
        
                oMenu.show();
                oMenu.align("tl", "bl");

                nMenuHeight = oMenu.element.offsetHeight;
        
        
                if ((oMenu.cfg.getProperty("y") + nMenuHeight) > 
                    nViewportHeight) {
        
                    this.logger.log("Current menu position will place a " +
                        "portion, or the entire menu outside the boundary of " + 
                        "the viewport.  Repositioning the menu to stay inside" + 
                        " the viewport.");
        
                    oMenu.align("bl", "tl");
                    
                }
        
            }
        
        },
        
        
        /**
        * @method _hideMenu
        * @description Hides the button's menu.
        * @protected
        */
        _hideMenu: function () {
        
            var oMenu = this._menu;
        
            if (oMenu) {
        
                oMenu.hide();
        
            }
        
        },
        
        
        
        
        // Protected event handlers
        
        
        /**
        * @method _onMouseOver
        * @description "mouseover" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseOver: function (p_oEvent) {
        
            if (!this._hasMouseEventHandlers) {
        
                this.on("mouseout", this._onMouseOut);
                this.on("mousedown", this._onMouseDown);
                this.on("mouseup", this._onMouseUp);
        
                this._hasMouseEventHandlers = true;
        
            }
        
            this.addStateCSSClasses("hover");
        
            if (this._activationButtonPressed) {
        
                this.addStateCSSClasses("active");
        
            }
        
        
            if (this._bOptionPressed) {
        
                this.addStateCSSClasses("activeoption");
            
            }
        
        },
        
        
        /**
        * @method _onMouseOut
        * @description "mouseout" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseOut: function (p_oEvent) {
        
            this.removeStateCSSClasses("hover");
        
            if (this.get("type") != "menu") {
        
                this.removeStateCSSClasses("active");
        
            }
        
            if (this._activationButtonPressed || this._bOptionPressed) {
        
                Event.on(document, "mouseup", this._onDocumentMouseUp, 
                    null, this);
        
            }
            
        },
        
        
        /**
        * @method _onDocumentMouseUp
        * @description "mouseup" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onDocumentMouseUp: function (p_oEvent) {
        
            this._activationButtonPressed = false;
            this._bOptionPressed = false;
        
            var sType = this.get("type");
        
            if (sType == "menu" || sType == "split") {
        
                this.removeStateCSSClasses(
                    (sType == "menu" ? "active" : "activeoption"));
        
                this._hideMenu();
        
            }
        
            Event.removeListener(document, "mouseup", this._onDocumentMouseUp);
        
        },
        
        
        /**
        * @method _onMouseDown
        * @description "mousedown" event handler for the button.
        * @protected
        * @param {Event} p_oEvent Object representing the DOM event object  
        * passed back by the event utility (YAHOO.util.Event).
        */
        _onMouseDown: function (p_oEvent) {
        
            var sType,
                oElement,
                nX,
                me;
        
        
            function onMouseUp() {
            
                this._hideMenu();
                this.removeListener("mouseup", onMouseUp);
            
            }
        
        
            if ((p_oEvent.which || p_oEvent.button) == 1) {
        
        
                if (!this.hasFocus()) {
                
                    this.focus();
                
                }
        
        
                sType = this.get("type");
        
        
                if (sType == "split") {
                
                    oElement = this.get("element");
                    nX = Event.getPageX(p_oEvent) - Dom.getX(oElement);
        
                    if ((oElement.offsetWidth - this.OPTION_AREA_WIDTH) < nX) {
                        
                        this.fireEvent("option", p_oEvent);
        
                    }
                    else {
        
                        this.addStateCSSClasses("active");
        
                        this._activationButtonPressed = true;
        
                    }
        
                }
                else if (sType == "menu") {
        
                    if (this.isActive()) {
        
                        this._hideMenu();
        
                        this._activationButtonPressed = false;
        
                    }
                    else {
        
                        this._showMenu(p_oEvent);
        
                        this._activationButtonPressed = true;
                    
                    }
        
                }
                else {
        
                    this.addStateCSSClasses("active");
        
                    this._activationButtonPressed = true;
                
                }
        
        
        
                if (sType == "split" || sType == "menu") {

                    me = this;