source:
trunk/workshop-routing-foss4g/web/ext/src/widgets/grid/AbstractSelectionModel.js
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| Revision 76, 2.6 KB checked in by djay, 12 years ago (diff) | |
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| 1 | /*! |
| 2 | * Ext JS Library 3.4.0 |
| 3 | * Copyright(c) 2006-2011 Sencha Inc. |
| 4 | * licensing@sencha.com |
| 5 | * http://www.sencha.com/license |
| 6 | */ |
| 7 | /** |
| 8 | * @class Ext.grid.AbstractSelectionModel |
| 9 | * @extends Ext.util.Observable |
| 10 | * Abstract base class for grid SelectionModels. It provides the interface that should be |
| 11 | * implemented by descendant classes. This class should not be directly instantiated. |
| 12 | * @constructor |
| 13 | */ |
| 14 | Ext.grid.AbstractSelectionModel = Ext.extend(Ext.util.Observable, { |
| 15 | /** |
| 16 | * The GridPanel for which this SelectionModel is handling selection. Read-only. |
| 17 | * @type Object |
| 18 | * @property grid |
| 19 | */ |
| 20 | |
| 21 | constructor : function(){ |
| 22 | this.locked = false; |
| 23 | Ext.grid.AbstractSelectionModel.superclass.constructor.call(this); |
| 24 | }, |
| 25 | |
| 26 | /** @ignore Called by the grid automatically. Do not call directly. */ |
| 27 | init : function(grid){ |
| 28 | this.grid = grid; |
| 29 | if(this.lockOnInit){ |
| 30 | delete this.lockOnInit; |
| 31 | this.locked = false; |
| 32 | this.lock(); |
| 33 | } |
| 34 | this.initEvents(); |
| 35 | }, |
| 36 | |
| 37 | /** |
| 38 | * Locks the selections. |
| 39 | */ |
| 40 | lock : function(){ |
| 41 | if(!this.locked){ |
| 42 | this.locked = true; |
| 43 | // If the grid has been set, then the view is already initialized. |
| 44 | var g = this.grid; |
| 45 | if(g){ |
| 46 | g.getView().on({ |
| 47 | scope: this, |
| 48 | beforerefresh: this.sortUnLock, |
| 49 | refresh: this.sortLock |
| 50 | }); |
| 51 | }else{ |
| 52 | this.lockOnInit = true; |
| 53 | } |
| 54 | } |
| 55 | }, |
| 56 | |
| 57 | // set the lock states before and after a view refresh |
| 58 | sortLock : function() { |
| 59 | this.locked = true; |
| 60 | }, |
| 61 | |
| 62 | // set the lock states before and after a view refresh |
| 63 | sortUnLock : function() { |
| 64 | this.locked = false; |
| 65 | }, |
| 66 | |
| 67 | /** |
| 68 | * Unlocks the selections. |
| 69 | */ |
| 70 | unlock : function(){ |
| 71 | if(this.locked){ |
| 72 | this.locked = false; |
| 73 | var g = this.grid, |
| 74 | gv; |
| 75 | |
| 76 | // If the grid has been set, then the view is already initialized. |
| 77 | if(g){ |
| 78 | gv = g.getView(); |
| 79 | gv.un('beforerefresh', this.sortUnLock, this); |
| 80 | gv.un('refresh', this.sortLock, this); |
| 81 | }else{ |
| 82 | delete this.lockOnInit; |
| 83 | } |
| 84 | } |
| 85 | }, |
| 86 | |
| 87 | /** |
| 88 | * Returns true if the selections are locked. |
| 89 | * @return {Boolean} |
| 90 | */ |
| 91 | isLocked : function(){ |
| 92 | return this.locked; |
| 93 | }, |
| 94 | |
| 95 | destroy: function(){ |
| 96 | this.unlock(); |
| 97 | this.purgeListeners(); |
| 98 | } |
| 99 | }); |
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