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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.ToolbarReorderer"></div>/**
- * @class Ext.ux.ToolbarReorderer
- * @extends Ext.ux.Reorderer
- * Plugin which can be attached to any Ext.Toolbar instance. Provides ability to reorder toolbar items
- * with drag and drop. Example:
- * <pre>
- * new Ext.Toolbar({
- * plugins: [
- * new Ext.ux.ToolbarReorderer({
- * defaultReorderable: true
- * })
- * ],
- * items: [
- * {text: 'Button 1', reorderable: false},
- * {text: 'Button 2'},
- * {text: 'Button 3'}
- * ]
- * });
- * </pre>
- * In the example above, buttons 2 and 3 will be reorderable via drag and drop. An event named 'reordered'
- * is added to the Toolbar, and is fired whenever a reorder has been completed.
- */
-Ext.ux.ToolbarReorderer = Ext.extend(Ext.ux.Reorderer, {
- <div id="method-Ext.ux.ToolbarReorderer-init"></div>/**
- * Initializes the plugin, decorates the toolbar with additional functionality
- */
- init: function(toolbar) {
- <div id="prop-Ext.ux.ToolbarReorderer-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 = {};
-
- toolbar.on({
- scope: this,
- add : function(toolbar, item) {
- this.createIfReorderable(item);
- }
- });
-
- //super sets a reference to the toolbar in this.target
- Ext.ux.ToolbarReorderer.superclass.init.apply(this, arguments);
- },
-
- <div id="method-Ext.ux.ToolbarReorderer-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,
- tbar = this.target,
- me = this;
-
- button.dd = new Ext.dd.DD(el, undefined, {
- isTarget: false
- });
-
- //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,
- 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.ToolbarReorderer-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;
-
- 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 (var index = 0; index < items.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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