modalpopupbehavior.js

AJAX 应用 实现页面的无刷新

// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.


/// <reference name="MicrosoftAjax.debug.js" />
/// <reference name="MicrosoftAjaxTimer.debug.js" />
/// <reference name="MicrosoftAjaxWebForms.debug.js" />
/// <reference path="../ExtenderBase/BaseScripts.js" />
/// <reference path="../Common/Common.js" />
/// <reference path="../DynamicPopulate/DynamicPopulateBehavior.js" />
/// <reference path="../RoundedCorners/RoundedCornersBehavior.js" />
/// <reference path="../Compat/Timer/Timer.js" />
/// <reference path="../DropShadow/DropShadowBehavior.js" />
/// <reference path="../Compat/DragDrop/DragDropScripts.js" />
/// <reference path="../DragPanel/FloatingBehavior.js" />


Type.registerNamespace('AjaxControlToolkit');

AjaxControlToolkit.ModalPopupRepositionMode = function() {
    /// <summary>
    /// The ModalPopupRepositionMode enumeration describes how the modal popup repositions
    /// </summary>
    /// <field name="None" type="Number" integer="true" />
    /// <field name="RepositionOnWindowResize" type="Number" integer="true" />
    /// <field name="RepositionOnWindowScroll" type="Number" integer="true" />
    /// <field name="RepositionOnWindowResizeAndScroll" type="Number" integer="true" />
    throw Error.invalidOperation();
}
AjaxControlToolkit.ModalPopupRepositionMode.prototype = {
    None : 0,
    RepositionOnWindowResize : 1,
    RepositionOnWindowScroll : 2,
    RepositionOnWindowResizeAndScroll : 3
}
AjaxControlToolkit.ModalPopupRepositionMode.registerEnum('AjaxControlToolkit.ModalPopupRepositionMode');


AjaxControlToolkit.ModalPopupBehavior = function(element) {
    /// <summary>
    /// The ModalPopupBehavior is used to display the target element as a modal dialog
    /// </summary>
    /// <param name="element" type="Sys.UI.DomElement" domElement="true">
    /// DOM Element the behavior is associated with
    /// </param>
    AjaxControlToolkit.ModalPopupBehavior.initializeBase(this, [element]);
    
    // Properties
    this._PopupControlID = null;
    this._PopupDragHandleControlID = null;
    this._BackgroundCssClass = null;
    this._DropShadow = false;
    this._Drag = false;    
    this._OkControlID = null;
    this._CancelControlID = null;
    this._OnOkScript = null;
    this._OnCancelScript = null;
    this._xCoordinate = -1;
    this._yCoordinate = -1;
    this._repositionMode = AjaxControlToolkit.ModalPopupRepositionMode.RepositionOnWindowResizeAndScroll;

    // Variables
    this._backgroundElement = null;
    this._foregroundElement = null;
    this._relativeOrAbsoluteParentElement = null;
    this._popupElement = null;
    this._dragHandleElement = null;
    this._showHandler = null;
    this._okHandler = null;
    this._cancelHandler = null;
    this._scrollHandler = null;
    this._resizeHandler = null;
    this._windowHandlersAttached = false;
    this._dropShadowBehavior = null;
    this._dragBehavior = null;
    this._isIE6 = false;

    this._saveTabIndexes = new Array();
    this._saveDesableSelect = new Array();
    this._tagWithTabIndex = new Array('A','AREA','BUTTON','INPUT','OBJECT','SELECT','TEXTAREA','IFRAME');
}
AjaxControlToolkit.ModalPopupBehavior.prototype = {
    initialize : function() {
        /// <summary>
        /// Initialize the behavior
        /// </summary>
        
        /*
            <div superpopup - drag container resizable><div -- drag handle\dropshadow foreground></div></div>
        */
        AjaxControlToolkit.ModalPopupBehavior.callBaseMethod(this, 'initialize');
        this._isIE6 = (Sys.Browser.agent == Sys.Browser.InternetExplorer && Sys.Browser.version < 7);
        if(this._PopupDragHandleControlID)
            this._dragHandleElement = $get(this._PopupDragHandleControlID);

        this._popupElement = $get(this._PopupControlID);
        if(this._DropShadow)
        {
            this._foregroundElement = document.createElement('div');
            this._foregroundElement.id = this.get_id() + '_foregroundElement';
            this._popupElement.parentNode.appendChild(this._foregroundElement);
            this._foregroundElement.appendChild(this._popupElement);
        }
        else
        {
            this._foregroundElement = this._popupElement;
        }
        this._backgroundElement = document.createElement('div');
        this._backgroundElement.id = this.get_id() + '_backgroundElement';
        this._backgroundElement.style.display = 'none';
        this._backgroundElement.style.position = 'fixed';
        this._backgroundElement.style.left = '0px';
        this._backgroundElement.style.top = '0px';
        // Want zIndex to big enough that the background sits above everything else
        // CSS 2.1 defines no bounds for the <integer> type, so pick arbitrarily
        this._backgroundElement.style.zIndex = 10000;
        if (this._BackgroundCssClass) {
            this._backgroundElement.className = this._BackgroundCssClass;
        }
        this._foregroundElement.parentNode.appendChild(this._backgroundElement);

        this._foregroundElement.style.display = 'none';
        this._foregroundElement.style.position = 'fixed';
        this._foregroundElement.style.zIndex = $common.getCurrentStyle(this._backgroundElement, 'zIndex', this._backgroundElement.style.zIndex) + 1;
        
        this._showHandler = Function.createDelegate(this, this._onShow);
        $addHandler(this.get_element(), 'click', this._showHandler);

        if (this._OkControlID) {
            this._okHandler = Function.createDelegate(this, this._onOk);
            $addHandler($get(this._OkControlID), 'click', this._okHandler);
        }

        if (this._CancelControlID) {
            this._cancelHandler = Function.createDelegate(this, this._onCancel);
            $addHandler($get(this._CancelControlID), 'click', this._cancelHandler);
        }

        this._scrollHandler = Function.createDelegate(this, this._onLayout);
        this._resizeHandler = Function.createDelegate(this, this._onLayout);

        // Need to know when partial updates complete
        this.registerPartialUpdateEvents();
    },

    dispose : function() {
        /// <summary>
        /// Dispose the behavior
        /// </summary>

        // Going away; restore any changes to the page
        this._hideImplementation();

        if (this._foregroundElement && this._foregroundElement.parentNode) {
            // Remove background we added to the DOM
            this._foregroundElement.parentNode.removeChild(this._backgroundElement);

            if(this._DropShadow) {
                // Remove DIV wrapper added in initialize
                this._foregroundElement.parentNode.appendChild(this._popupElement);
                this._foregroundElement.parentNode.removeChild(this._foregroundElement);
            }
        }

        this._scrollHandler = null;
        this._resizeHandler = null;
        if (this._cancelHandler && $get(this._CancelControlID)) {
            $removeHandler($get(this._CancelControlID), 'click', this._cancelHandler);
            this._cancelHandler = null;
        }
        if (this._okHandler && $get(this._OkControlID)) {
            $removeHandler($get(this._OkControlID), 'click', this._okHandler);
            this._okHandler = null;
        }
        if (this._showHandler) {
            $removeHandler(this.get_element(), 'click', this._showHandler);
            this._showHandler = null;
        }
        
        AjaxControlToolkit.ModalPopupBehavior.callBaseMethod(this, 'dispose');
    },

    _attachPopup : function() {
        /// <summary>
        /// Attach the event handlers for the popup
        /// </summary>

        if (this._DropShadow && !this._dropShadowBehavior) {
            this._dropShadowBehavior = $create(AjaxControlToolkit.DropShadowBehavior, {}, null, null, this._popupElement);
        }
        if (this._dragHandleElement && !this._dragBehavior) {
            this._dragBehavior = $create(AjaxControlToolkit.FloatingBehavior, {"handle" : this._dragHandleElement}, null, null, this._foregroundElement);
        }        
                
        $addHandler(window, 'resize', this._resizeHandler);
        $addHandler(window, 'scroll', this._scrollHandler);
        this._windowHandlersAttached = true;
    },

    _detachPopup : function() {
        /// <summary>
        /// Detach the event handlers for the popup
        /// </summary>

        if (this._windowHandlersAttached) {
            if (this._scrollHandler) {
                $removeHandler(window, 'scroll', this._scrollHandler);
            }
            if (this._resizeHandler) {
                $removeHandler(window, 'resize', this._resizeHandler);
            }
            this._windowHandlersAttached = false;
        }
        
        if (this._dragBehavior) {
            this._dragBehavior.dispose();
            this._dragBehavior = null;
        }       
        
        if (this._dropShadowBehavior) {
            this._dropShadowBehavior.dispose();
            this._dropShadowBehavior = null;
        }
    },

    _onShow : function(e) {
        /// <summary>
        /// Handler for the target's click event
        /// </summary>
        /// <param name="e" type="Sys.UI.DomEvent">
        /// Event info
        /// </param>

        if (!this.get_element().disabled) {
            this.show();
            e.preventDefault();
            return false;
        }
    },

    _onOk : function(e) {
        /// <summary>
        /// Handler for the modal dialog's OK button click
        /// </summary>
        /// <param name="e" type="Sys.UI.DomEvent">
        /// Event info
        /// </param>

        var element = $get(this._OkControlID);
        if (element && !element.disabled) {
            if (this.hide() && this._OnOkScript) {
                window.setTimeout(this._OnOkScript, 0);
            }
            e.preventDefault();
            return false;
        }
    },

    _onCancel : function(e) {
        /// <summary>
        /// Handler for the modal dialog's Cancel button click
        /// </summary>
        /// <param name="e" type="Sys.UI.DomEvent">
        /// Event info
        /// </param>

        var element = $get(this._CancelControlID);
        if (element && !element.disabled) {
            if (this.hide() && this._OnCancelScript) {
                window.setTimeout(this._OnCancelScript, 0);
            }
            e.preventDefault();
            return false;
        }
    },

    _onLayout : function(e) {
        /// <summary>
        /// Handler for scrolling and resizing events that would require a repositioning of the modal dialog
        /// </summary>
        /// <param name="e" type="Sys.UI.DomEvent">
        /// Event info
        /// </param>
        var positioning = this.get_repositionMode();
        if (((positioning === AjaxControlToolkit.ModalPopupRepositionMode.RepositionOnWindowScroll) ||
            (positioning === AjaxControlToolkit.ModalPopupRepositionMode.RepositionOnWindowResizeAndScroll)) && (e.type === 'scroll')) {
            this._layout();
        } else if (((positioning === AjaxControlToolkit.ModalPopupRepositionMode.RepositionOnWindowResize) ||
            (positioning === AjaxControlToolkit.ModalPopupRepositionMode.RepositionOnWindowResizeAndScroll)) && (e.type === 'resize')) {
            this._layout();
        } else {
            // Layout background element again to make sure it covers the whole background.
            // This needs to be called separately since _layout will not be always called
            // to reposition the popup depending on the RepositionMode but the background needs 
            // to handle the resize/scroll every time.
            this._layoutBackgroundElement();
        }
    },

    show : function() {
        /// <summary>
        /// Display the element referenced by PopupControlID as a modal dialog
        /// </summary>
        
        var eventArgs = new Sys.CancelEventArgs();
        this.raiseShowing(eventArgs);
        if (eventArgs.get_cancel()) {
            return;
        }
        
        this.populate();
        this._attachPopup();

        this._backgroundElement.style.display = '';
        this._foregroundElement.style.display = '';
        this._popupElement.style.display = '';
        if (this._isIE6) {
            this._foregroundElement.style.position = 'absolute';
            this._backgroundElement.style.position = 'absolute'; 
            // find the relative or absolute parent
            var tempRelativeOrAbsoluteParent = this._foregroundElement.parentNode;