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- <title>The source code</title>
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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.1
- * Copyright(c) 2006-2010 Sencha Inc.
- * licensing@sencha.com
- * http://www.sencha.com/license
- */
-<div id="cls-Ext.ux.Reorderer"></div>/**
- * @class Ext.ux.Reorderer
- * @extends Object
- * Generic base class for handling reordering of items. This base class must be extended to provide the
- * actual reordering functionality - the base class just sets up events and abstract logic functions.
- * It will fire events and set defaults, deferring the actual reordering to a doReorder implementation.
- * See Ext.ux.TabReorderer for an example.
- */
-Ext.ux.Reorderer = Ext.extend(Object, {
- <div id="prop-Ext.ux.Reorderer-defaults"></div>/**
- * @property defaults
- * @type Object
- * Object containing default values for plugin configuration details. These can be overridden when
- * constructing the plugin
- */
- defaults: {
- <div id="cfg-Ext.ux.Reorderer-null"></div>/**
- * @cfg animate
- * @type Boolean
- * If set to true, the rearranging of the toolbar items is animated
- */
- animate: true,
-
- <div id="cfg-Ext.ux.Reorderer-null"></div>/**
- * @cfg animationDuration
- * @type Number
- * The duration of the animation used to move other toolbar items out of the way
- */
- animationDuration: 0.2,
-
- <div id="cfg-Ext.ux.Reorderer-null"></div>/**
- * @cfg defaultReorderable
- * @type Boolean
- * True to make every toolbar draggable unless reorderable is specifically set to false.
- * This defaults to false
- */
- defaultReorderable: false
- },
-
- <div id="method-Ext.ux.Reorderer-constructor"></div>/**
- * Creates the plugin instance, applies defaults
- * @constructor
- * @param {Object} config Optional config object
- */
- constructor: function(config) {
- Ext.apply(this, config || {}, this.defaults);
- },
-
- <div id="method-Ext.ux.Reorderer-init"></div>/**
- * Initializes the plugin, stores a reference to the target
- * @param {Mixed} target The target component which contains the reorderable items
- */
- init: function(target) {
- <div id="prop-Ext.ux.Reorderer-target"></div>/**
- * @property target
- * @type Ext.Component
- * Reference to the target component which contains the reorderable items
- */
- this.target = target;
-
- this.initEvents();
-
- var items = this.getItems(),
- length = items.length,
- i;
-
- for (i = 0; i < length; i++) {
- this.createIfReorderable(items[i]);
- }
- },
-
- <div id="method-Ext.ux.Reorderer-reorder"></div>/**
- * Reorders the items in the target component according to the given mapping object. Example:
- * this.reorder({
- * 1: 5,
- * 3: 2
- * });
- * Would move the item at index 1 to index 5, and the item at index 3 to index 2
- * @param {Object} mappings Object containing current item index as key and new index as property
- */
- reorder: function(mappings) {
- var target = this.target;
-
- if (target.fireEvent('before-reorder', mappings, target, this) !== false) {
- this.doReorder(mappings);
-
- target.fireEvent('reorder', mappings, target, this);
- }
- },
-
- <div id="method-Ext.ux.Reorderer-doReorder"></div>/**
- * Abstract function to perform the actual reordering. This MUST be overridden in a subclass
- * @param {Object} mappings Mappings of the old item indexes to new item indexes
- */
- doReorder: function(paramName) {
- throw new Error("doReorder must be implemented in the Ext.ux.Reorderer subclass");
- },
-
- /**
- * Should create and return an Ext.dd.DD for the given item. This MUST be overridden in a subclass
- * @param {Mixed} item The item to create a DD for. This could be a TabPanel tab, a Toolbar button, etc
- * @return {Ext.dd.DD} The DD for the given item
- */
- createItemDD: function(item) {
- throw new Error("createItemDD must be implemented in the Ext.ux.Reorderer subclass");
- },
-
- <div id="method-Ext.ux.Reorderer-createItemDD"></div>/**
- * Sets up the given Toolbar item as a draggable
- * @param {Mixed} button The item to make draggable (usually an Ext.Button instance)
- */
- createItemDD: function(button) {
- var el = button.getEl(),
- id = el.id,
- tbar = this.target,
- me = this;
-
- button.dd = new Ext.dd.DD(el, undefined, {
- isTarget: false
- });
-
- button.dd.constrainTo(tbar.getEl());
- button.dd.setYConstraint(0, 0, 0);
-
- Ext.apply(button.dd, {
- b4StartDrag: function() {
- this.startPosition = el.getXY();
-
- //bump up the z index of the button being dragged but keep a reference to the original
- this.startZIndex = el.getStyle('zIndex');
- el.setStyle('zIndex', 10000);
-
- button.suspendEvents();
- },
-
- onDrag: function(e) {
- //calculate the button's index within the toolbar and its current midpoint
- var buttonX = el.getXY()[0],
- deltaX = buttonX - this.startPosition[0],
- items = tbar.items.items,
- oldIndex = items.indexOf(button),
- newIndex;
-
- //find which item in the toolbar the midpoint is currently over
- for (var index = 0; index < items.length; index++) {
- var item = items[index];
-
- if (item.reorderable && item.id != button.id) {
- //find the midpoint of the button
- var box = item.getEl().getBox(),
- midpoint = (me.buttonXCache[item.id] || box.x) + (box.width / 2),
- movedLeft = oldIndex > index && deltaX < 0 && buttonX < midpoint,
- movedRight = oldIndex < index && deltaX > 0 && (buttonX + el.getWidth()) > midpoint;
-
- if (movedLeft || movedRight) {
- me[movedLeft ? 'onMovedLeft' : 'onMovedRight'](button, index, oldIndex);
- break;
- }
- }
- }
- },
-
- <div id="method-Ext.ux.Reorderer-endDrag"></div>/**
- * After the drag has been completed, make sure the button being dragged makes it back to
- * the correct location and resets its z index
- */
- endDrag: function() {
- //we need to update the cache here for cases where the button was dragged but its
- //position in the toolbar did not change
- me.updateButtonXCache();
-
- el.moveTo(me.buttonXCache[button.id], undefined, {
- duration: me.animationDuration,
- scope : this,
- callback: function() {
- button.resumeEvents();
-
- tbar.fireEvent('reordered', button, tbar);
- }
- });
-
- el.setStyle('zIndex', this.startZIndex);
- }
- });
- },
-
- /**
- * @private
- * Creates a DD instance for a given item if it is reorderable
- * @param {Mixed} item The item
- */
- createIfReorderable: function(item) {
- if (this.defaultReorderable && item.reorderable == undefined) {
- item.reorderable = true;
- }
-
- if (item.reorderable && !item.dd) {
- if (item.rendered) {
- this.createItemDD(item);
- } else {
- item.on('render', this.createItemDD.createDelegate(this, [item]), this, {single: true});
- }
- }
- },
-
- <div id="method-Ext.ux.Reorderer-getItems"></div>/**
- * Returns an array of items which will be made draggable. This defaults to the contents of this.target.items,
- * but can be overridden - e.g. for TabPanels
- * @return {Array} The array of items which will be made draggable
- */
- getItems: function() {
- return this.target.items.items;
- },
-
- <div id="method-Ext.ux.Reorderer-initEvents"></div>/**
- * Adds before-reorder and reorder events to the target component
- */
- initEvents: function() {
- this.target.addEvents(
- <div id="event-Ext.ux.Reorderer-before-reorder"></div>/**
- * @event before-reorder
- * Fires before a reorder occurs. Return false to cancel
- * @param {Object} mappings Mappings of the old item indexes to new item indexes
- * @param {Mixed} component The target component
- * @param {Ext.ux.TabReorderer} this The plugin instance
- */
- 'before-reorder',
-
- <div id="event-Ext.ux.Reorderer-reorder"></div>/**
- * @event reorder
- * Fires after a reorder has occured.
- * @param {Object} mappings Mappings of the old item indexes to the new item indexes
- * @param {Mixed} component The target component
- * @param {Ext.ux.TabReorderer} this The plugin instance
- */
- 'reorder'
- );
- }
-});
-
-<div id="cls-Ext.ux.HBoxReorderer"></div>/**
- * @class Ext.ux.HBoxReorderer
- * @extends Ext.ux.Reorderer
- * Description
- */
-Ext.ux.HBoxReorderer = Ext.extend(Ext.ux.Reorderer, {
- <div id="method-Ext.ux.HBoxReorderer-init"></div>/**
- * Initializes the plugin, decorates the container with additional functionality
- */
- init: function(container) {
- <div id="prop-Ext.ux.HBoxReorderer-buttonXCache"></div>/**
- * This is used to store the correct x value of each button in the array. We need to use this
- * instead of the button's reported x co-ordinate because the buttons are animated when they move -
- * if another onDrag is fired while the button is still moving, the comparison x value will be incorrect
- */
- this.buttonXCache = {};
-
- container.on({
- scope: this,
- add : function(container, item) {
- this.createIfReorderable(item);
- }
- });
-
- //super sets a reference to the toolbar in this.target
- Ext.ux.HBoxReorderer.superclass.init.apply(this, arguments);
- },
-
- <div id="method-Ext.ux.HBoxReorderer-createItemDD"></div>/**
- * Sets up the given Toolbar item as a draggable
- * @param {Mixed} button The item to make draggable (usually an Ext.Button instance)
- */
- createItemDD: function(button) {
- if (button.dd != undefined) {
- return;
- }
-
- var el = button.getEl(),
- id = el.id,
- me = this,
- tbar = me.target;
-
- button.dd = new Ext.dd.DD(el, undefined, {
- isTarget: false
- });
-
- el.applyStyles({
- position: 'absolute'
- });
-
- //if a button has a menu, it is disabled while dragging with this function
- var menuDisabler = function() {
- return false;
- };
-
- Ext.apply(button.dd, {
- b4StartDrag: function() {
- this.startPosition = el.getXY();
-
- //bump up the z index of the button being dragged but keep a reference to the original
- this.startZIndex = el.getStyle('zIndex');
- el.setStyle('zIndex', 10000);
-
- button.suspendEvents();
- if (button.menu) {
- button.menu.on('beforeshow', menuDisabler, me);
- }
- },
-
- startDrag: function() {
- this.constrainTo(tbar.getEl());
- this.setYConstraint(0, 0, 0);
- },
-
- onDrag: function(e) {
- //calculate the button's index within the toolbar and its current midpoint
- var buttonX = el.getXY()[0],
- deltaX = buttonX - this.startPosition[0],
- items = tbar.items.items,
- length = items.length,
- oldIndex = items.indexOf(button),
- newIndex, index, item;
-
- //find which item in the toolbar the midpoint is currently over
- for (index = 0; index < length; index++) {
- item = items[index];
-
- if (item.reorderable && item.id != button.id) {
- //find the midpoint of the button
- var box = item.getEl().getBox(),
- midpoint = (me.buttonXCache[item.id] || box.x) + (box.width / 2),
- movedLeft = oldIndex > index && deltaX < 0 && buttonX < midpoint,
- movedRight = oldIndex < index && deltaX > 0 && (buttonX + el.getWidth()) > midpoint;
-
- if (movedLeft || movedRight) {
- me[movedLeft ? 'onMovedLeft' : 'onMovedRight'](button, index, oldIndex);
- break;
- }
- }
- }
- },
-
- <div id="method-Ext.ux.HBoxReorderer-endDrag"></div>/**
- * After the drag has been completed, make sure the button being dragged makes it back to
- * the correct location and resets its z index
- */
- endDrag: function() {
- //we need to update the cache here for cases where the button was dragged but its
- //position in the toolbar did not change
- me.updateButtonXCache();
-
- el.moveTo(me.buttonXCache[button.id], el.getY(), {
- duration: me.animationDuration,
- scope : this,
- callback: function() {
- button.resumeEvents();
- if (button.menu) {
- button.menu.un('beforeshow', menuDisabler, me);
- }
-
- tbar.fireEvent('reordered', button, tbar);
- }
- });
-
- el.setStyle('zIndex', this.startZIndex);
- }
- });
- },
-
- onMovedLeft: function(item, newIndex, oldIndex) {
- var tbar = this.target,
- items = tbar.items.items,
- length = items.length,
- index;
-
- if (newIndex != undefined && newIndex != oldIndex) {
- //move the button currently under drag to its new location
- tbar.remove(item, false);
- tbar.insert(newIndex, item);
-
- //set the correct x location of each item in the toolbar
- this.updateButtonXCache();
- for (index = 0; index < length; index++) {
- var obj = items[index],
- newX = this.buttonXCache[obj.id];
-
- if (item == obj) {
- item.dd.startPosition[0] = newX;
- } else {
- var el = obj.getEl();
-
- el.moveTo(newX, el.getY(), {
- duration: this.animationDuration
- });
- }
- }
- }
- },
-
- onMovedRight: function(item, newIndex, oldIndex) {
- this.onMovedLeft.apply(this, arguments);
- },
-
- /**
- * @private
- * Updates the internal cache of button X locations.
- */
- updateButtonXCache: function() {
- var tbar = this.target,
- items = tbar.items,
- totalX = tbar.getEl().getBox(true).x;
-
- items.each(function(item) {
- this.buttonXCache[item.id] = totalX;
-
- totalX += item.getEl().getWidth();
- }, this);
- }
-});</pre>
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