ddview.js

一个struts和extjs得源码

/*
 * Ext JS Library 2.2.1
 * Copyright(c) 2006-2009, Ext JS, LLC.
 * [e-mail]
 * 
 * http://extjs.com/license
 */

/*
 * Software License Agreement (BSD License)
 * Copyright (c) 2008, Nige "Animal" White
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice,
 *       this list of conditions and the following disclaimer in the documentation
 *       and/or other materials provided with the distribution.
 *     * Neither the name of the original author nor the names of its contributors
 *       may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * @class Ext.ux.DDView
 * <p>A DnD-enabled version of {@link Ext.DataView}. Drag/drop is implemented by adding
 * {@link Ext.data.Record}s to the target DDView. If copying is not being performed,
 * the original {@link Ext.data.Record} is removed from the source DDView.</p>
 * @constructor
 * Create a new DDView
 * @param {Object} config The configuration properties.
 */
Ext.ux.DDView = function(config) {
    if (!config.itemSelector) {
        var tpl = config.tpl;
        if (this.classRe.test(tpl)) {
            config.tpl = tpl.replace(this.classRe, 'class=$1x-combo-list-item $2$1');
        }
        else {
            config.tpl = tpl.replace(this.tagRe, '$1 class="x-combo-list-item" $2');
        }
        config.itemSelector = ".x-combo-list-item";
    }
    Ext.ux.DDView.superclass.constructor.call(this, Ext.apply(config, {
        border: false
    }));
};

Ext.extend(Ext.ux.DDView, Ext.DataView, {
    /**
     * @cfg {String/Array} dragGroup The ddgroup name(s) for the View's DragZone (defaults to undefined).
     */
    /**
     * @cfg {String/Array} dropGroup The ddgroup name(s) for the View's DropZone (defaults to undefined).
     */
    /**
     * @cfg {Boolean} copy Causes drag operations to copy nodes rather than move (defaults to false).
     */
    /**
     * @cfg {Boolean} allowCopy Causes ctrl/drag operations to copy nodes rather than move (defaults to false).
     */
    /**
     * @cfg {String} sortDir Sort direction for the view, 'ASC' or 'DESC' (defaults to 'ASC').
     */
    sortDir: 'ASC',

    // private
    isFormField: true,
    classRe: /class=(['"])(.*)\1/,
    tagRe: /(<\w*)(.*?>)/,
    reset: Ext.emptyFn,
    clearInvalid: Ext.form.Field.prototype.clearInvalid,

    // private
    afterRender: function() {
        Ext.ux.DDView.superclass.afterRender.call(this);
        if (this.dragGroup) {
            this.setDraggable(this.dragGroup.split(","));
        }
        if (this.dropGroup) {
            this.setDroppable(this.dropGroup.split(","));
        }
        if (this.deletable) {
            this.setDeletable();
        }
        this.isDirtyFlag = false;
        this.addEvents(
            "drop"
        );
    },

    // private
    validate: function() {
        return true;
    },

    // private
    destroy: function() {
        this.purgeListeners();
        this.getEl().removeAllListeners();
        this.getEl().remove();
        if (this.dragZone) {
            if (this.dragZone.destroy) {
                this.dragZone.destroy();
            }
        }
        if (this.dropZone) {
            if (this.dropZone.destroy) {
                this.dropZone.destroy();
            }
        }
    },

	/**
	 * Allows this class to be an Ext.form.Field so it can be found using {@link Ext.form.BasicForm#findField}.
	 */
    getName: function() {
        return this.name;
    },

	/**
	 * Loads the View from a JSON string representing the Records to put into the Store.
     * @param {String} value The JSON string
	 */
    setValue: function(v) {
        if (!this.store) {
            throw "DDView.setValue(). DDView must be constructed with a valid Store";
        }
        var data = {};
        data[this.store.reader.meta.root] = v ? [].concat(v) : [];
        this.store.proxy = new Ext.data.MemoryProxy(data);
        this.store.load();
    },

	/**
	 * Returns the view's data value as a list of ids.
     * @return {String} A parenthesised list of the ids of the Records in the View, e.g. (1,3,8).
	 */
    getValue: function() {
        var result = '(';
        this.store.each(function(rec) {
            result += rec.id + ',';
        });
        return result.substr(0, result.length - 1) + ')';
    },

    getIds: function() {
        var i = 0, result = new Array(this.store.getCount());
        this.store.each(function(rec) {
            result[i++] = rec.id;
        });
        return result;
    },

    /**
     * Returns true if the view's data has changed, else false.
     * @return {Boolean}
     */
    isDirty: function() {
        return this.isDirtyFlag;
    },

	/**
	 * Part of the Ext.dd.DropZone interface. If no target node is found, the
	 * whole Element becomes the target, and this causes the drop gesture to append.
	 */
    getTargetFromEvent : function(e) {
        var target = e.getTarget();
        while ((target !== null) && (target.parentNode != this.el.dom)) {
            target = target.parentNode;
        }
        if (!target) {
            target = this.el.dom.lastChild || this.el.dom;
        }
        return target;
    },

	/**
	 * Create the drag data which consists of an object which has the property "ddel" as
	 * the drag proxy element.
	 */
    getDragData : function(e) {
        var target = this.findItemFromChild(e.getTarget());
        if(target) {
            if (!this.isSelected(target)) {
                delete this.ignoreNextClick;
                this.onItemClick(target, this.indexOf(target), e);
                this.ignoreNextClick = true;
            }
            var dragData = {
                sourceView: this,
                viewNodes: [],
                records: [],
                copy: this.copy || (this.allowCopy && e.ctrlKey)
            };
            if (this.getSelectionCount() == 1) {
                var i = this.getSelectedIndexes()[0];
                var n = this.getNode(i);
                dragData.viewNodes.push(dragData.ddel = n);
                dragData.records.push(this.store.getAt(i));
                dragData.repairXY = Ext.fly(n).getXY();
            } else {
                dragData.ddel = document.createElement('div');
                dragData.ddel.className = 'multi-proxy';
                this.collectSelection(dragData);
            }
            return dragData;
        }
        return false;
    },

    // override the default repairXY.
    getRepairXY : function(e){
        return this.dragData.repairXY;
    },

	// private
    collectSelection: function(data) {
        data.repairXY = Ext.fly(this.getSelectedNodes()[0]).getXY();
        if (this.preserveSelectionOrder === true) {
            Ext.each(this.getSelectedIndexes(), function(i) {
                var n = this.getNode(i);
                var dragNode = n.cloneNode(true);
                dragNode.id = Ext.id();
                data.ddel.appendChild(dragNode);
                data.records.push(this.store.getAt(i));
                data.viewNodes.push(n);
            }, this);
        } else {
            var i = 0;
            this.store.each(function(rec){
                if (this.isSelected(i)) {
                    var n = this.getNode(i);
                    var dragNode = n.cloneNode(true);
                    dragNode.id = Ext.id();
                    data.ddel.appendChild(dragNode);
                    data.records.push(this.store.getAt(i));
                    data.viewNodes.push(n);
                }
                i++;
            }, this);
        }
    },

	/**
	 * Specify to which ddGroup items in this DDView may be dragged.
     * @param {String} ddGroup The DD group name to assign this view to.
	 */
    setDraggable: function(ddGroup) {
        if (ddGroup instanceof Array) {
            Ext.each(ddGroup, this.setDraggable, this);
            return;
        }
        if (this.dragZone) {
            this.dragZone.addToGroup(ddGroup);
        } else {
            this.dragZone = new Ext.dd.DragZone(this.getEl(), {
                containerScroll: true,
                ddGroup: ddGroup
            });
            // Draggability implies selection. DragZone's mousedown selects the element.
            if (!this.multiSelect) { this.singleSelect = true; }

            // Wire the DragZone's handlers up to methods in *this*
            this.dragZone.getDragData = this.getDragData.createDelegate(this);
            this.dragZone.getRepairXY = this.getRepairXY;
            this.dragZone.onEndDrag = this.onEndDrag;
        }
    },

	/**
	 * Specify from which ddGroup this DDView accepts drops.
     * @param {String} ddGroup The DD group name from which to accept drops.
	 */
    setDroppable: function(ddGroup) {
        if (ddGroup instanceof Array) {
            Ext.each(ddGroup, this.setDroppable, this);
            return;
        }
        if (this.dropZone) {
            this.dropZone.addToGroup(ddGroup);
        } else {
            this.dropZone = new Ext.dd.DropZone(this.getEl(), {
                owningView: this,
                containerScroll: true,
                ddGroup: ddGroup
            });

            // Wire the DropZone's handlers up to methods in *this*
            this.dropZone.getTargetFromEvent = this.getTargetFromEvent.createDelegate(this);
            this.dropZone.onNodeEnter = this.onNodeEnter.createDelegate(this);
            this.dropZone.onNodeOver = this.onNodeOver.createDelegate(this);