/**
* Creates a list of options or commands which are made visible in response to
* an HTML element's "contextmenu" event ("mousedown" for Opera).
*
* @param {String} p_oElement String specifying the id attribute of the
* <code><div></code> element of the context menu.
* @param {String} p_oElement String specifying the id attribute of the
* <code><select></code> element to be used as the data source for the
* context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object specifying the
* <code><div></code> element of the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-94282980">HTMLSelectElement</a>} p_oElement Object specifying
* the <code><select></code> element to be used as the data source for
* the context menu.
* @param {Object} p_oConfig Optional. Object literal specifying the
* configuration for the context menu. See configuration class documentation
* for more details.
* @class ContextMenu
* @constructor
* @extends YAHOO.widget.Menu
* @namespace YAHOO.widget
*/
YAHOO.widget.ContextMenu = function(p_oElement, p_oConfig) {
YAHOO.widget.ContextMenu.superclass.constructor.call(
this,
p_oElement,
p_oConfig
);
};
YAHOO.extend(YAHOO.widget.ContextMenu, YAHOO.widget.Menu, {
// Private properties
/**
* @property _oTrigger
* @description Object reference to the current value of the "trigger"
* configuration property.
* @default null
* @private
* @type String|<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/leve
* l-one-html.html#ID-58190037">HTMLElement</a>|Array
*/
_oTrigger: null,
// Public properties
/**
* @property contextEventTarget
* @description Object reference for the HTML element that was the target of the
* "contextmenu" DOM event ("mousedown" for Opera) that triggered the display of
* the context menu.
* @default null
* @type <a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-58190037">HTMLElement</a>
*/
contextEventTarget: null,
/**
* @method init
* @description The ContextMenu class's initialization method. This method is
* automatically called by the constructor, and sets up all DOM references for
* pre-existing markup, and creates required markup if it is not already present.
* @param {String} p_oElement String specifying the id attribute of the
* <code><div></code> element of the context menu.
* @param {String} p_oElement String specifying the id attribute of the
* <code><select></code> element to be used as the data source for
* the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-22445964">HTMLDivElement</a>} p_oElement Object specifying the
* <code><div></code> element of the context menu.
* @param {<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/level-one-
* html.html#ID-94282980">HTMLSelectElement</a>} p_oElement Object specifying
* the <code><select></code> element to be used as the data source for
* the context menu.
* @param {Object} p_oConfig Optional. Object literal specifying the
* configuration for the context menu. See configuration class documentation
* for more details.
*/
init: function(p_oElement, p_oConfig) {
if(!this.ITEM_TYPE) {
this.ITEM_TYPE = YAHOO.widget.ContextMenuItem;
}
// Call the init of the superclass (YAHOO.widget.Menu)
YAHOO.widget.ContextMenu.superclass.init.call(this, p_oElement);
this.beforeInitEvent.fire(YAHOO.widget.ContextMenu);
if(p_oConfig) {
this.cfg.applyConfig(p_oConfig, true);
}
this.initEvent.fire(YAHOO.widget.ContextMenu);
},
// Private methods
/**
* @method _removeEventHandlers
* @description Removes all of the DOM event handlers from the HTML element(s)
* whose "context menu" event ("click" for Opera) trigger the display of
* the context menu.
* @private
*/
_removeEventHandlers: function() {
var Event = YAHOO.util.Event,
oTrigger = this._oTrigger,
bOpera = (this.browser == "opera");
// Remove the event handlers from the trigger(s)
Event.removeListener(
oTrigger,
(bOpera ? "mousedown" : "contextmenu"),
this._onTriggerContextMenu
);
if(bOpera) {
Event.removeListener(oTrigger, "click", this._onTriggerClick);
}
},
// Private event handlers
/**
* @method _onTriggerClick
* @description "click" event handler for the HTML element(s) identified as the
* "trigger" for the context menu. Used to cancel default behaviors in Opera.
* @private
* @param {Event} p_oEvent Object representing the DOM event object passed back
* by the event utility (YAHOO.util.Event).
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that is handling the event.
*/
_onTriggerClick: function(p_oEvent, p_oMenu) {
if(p_oEvent.ctrlKey) {
YAHOO.util.Event.stopEvent(p_oEvent);
}
},
/**
* @method _onTriggerContextMenu
* @description "contextmenu" event handler ("mousedown" for Opera) for the HTML
* element(s) that trigger the display of the context menu.
* @private
* @param {Event} p_oEvent Object representing the DOM event object passed back
* by the event utility (YAHOO.util.Event).
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that is handling the event.
*/
_onTriggerContextMenu: function(p_oEvent, p_oMenu) {
// Hide any other ContextMenu instances that might be visible
YAHOO.widget.MenuManager.hideVisible();
var Event = YAHOO.util.Event,
oConfig = this.cfg;
if(p_oEvent.type == "mousedown" && !p_oEvent.ctrlKey) {
return;
}
this.contextEventTarget = Event.getTarget(p_oEvent);
// Position and display the context menu
var nX = Event.getPageX(p_oEvent),
nY = Event.getPageY(p_oEvent);
oConfig.applyConfig( { xy:[nX, nY], visible:true } );
oConfig.fireQueue();
/*
Prevent the browser's default context menu from appearing and
stop the propagation of the "contextmenu" event so that
other ContextMenu instances are not displayed.
*/
Event.stopEvent(p_oEvent);
},
// Public methods
/**
* @method toString
* @description Returns a string representing the context menu.
* @return {String}
*/
toString: function() {
return ("ContextMenu " + this.id);
},
/**
* @method initDefaultConfig
* @description Initializes the class's configurable properties which can be
* changed using the context menu's Config object ("cfg").
*/
initDefaultConfig: function() {
YAHOO.widget.ContextMenu.superclass.initDefaultConfig.call(this);
/**
* @config trigger
* @description The HTML element(s) whose "contextmenu" event ("mousedown"
* for Opera) trigger the display of the context menu. Can be a string
* representing the id attribute of the HTML element, an object reference
* for the HTML element, or an array of strings or HTML element references.
* @default null
* @type String|<a href="http://www.w3.org/TR/2000/WD-DOM-Level-1-20000929/
* level-one-html.html#ID-58190037">HTMLElement</a>|Array
*/
this.cfg.addProperty("trigger", { handler: this.configTrigger });
},
/**
* @method destroy
* @description Removes the context menu's <code><div></code> element
* (and accompanying child nodes) from the document.
*/
destroy: function() {
// Remove the DOM event handlers from the current trigger(s)
this._removeEventHandlers();
// Continue with the superclass implementation of this method
YAHOO.widget.ContextMenu.superclass.destroy.call(this);
},
// Public event handlers for configuration properties
/**
* @method configTrigger
* @description Event handler for when the value of the "trigger" configuration
* property changes.
* @param {String} p_sType String representing the name of the event that
* was fired.
* @param {Array} p_aArgs Array of arguments sent when the event was fired.
* @param {YAHOO.widget.ContextMenu} p_oMenu Object representing the context
* menu that fired the event.
*/
configTrigger: function(p_sType, p_aArgs, p_oMenu) {
var Event = YAHOO.util.Event,
oTrigger = p_aArgs[0];
if(oTrigger) {
/*
If there is a current "trigger" - remove the event handlers
from that element(s) before assigning new ones
*/
if(this._oTrigger) {
this._removeEventHandlers();
}
this._oTrigger = oTrigger;
/*
Listen for the "mousedown" event in Opera b/c it does not
support the "contextmenu" event
*/
var bOpera = (this.browser == "opera");
Event.addListener(
oTrigger,
(bOpera ? "mousedown" : "contextmenu"),
this._onTriggerContextMenu,
this,
true
);
/*
Assign a "click" event handler to the trigger element(s) for
Opera to prevent default browser behaviors.
*/
if(bOpera) {
Event.addListener(
oTrigger,
"click",
this._onTriggerClick,
this,
true
);
}
}
else {
this._removeEventHandlers();
}
}
}); // END YAHOO.extend
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