git.roojs.org Git - roojs1/blob - Roo/form/ComboNested.js

   1 /*
   2  * RooJS Library 1.1.1
   3  * Copyright(c) 2008-2011  Alan Knowles
   4  *
   5  * License - LGPL
   6  */
   7
   8
   9 /**
  10  * @class Roo.form.ComboNested
  11  * @extends Roo.form.ComboBox
  12  * A combobox for that allows selection of nested items in a list,
  13  * eg.
  14  *
  15  *  Book
  16  *    -> red
  17  *    -> green
  18  *  Table
  19  *    -> square
  20  *      ->red
  21  *      ->green
  22  *    -> rectangle
  23  *      ->green
  24  *
  25  *
  26  * @constructor
  27  * Create a new ComboNested
  28  * @param {Object} config Configuration options
  29  */
  30 Roo.form.ComboNested = function(config){
  31     Roo.form.ComboCheck.superclass.constructor.call(this, config);
  32     // should verify some data...
  33     // like
  34     // hiddenName = required..
  35     // displayField = required
  36     // valudField == required
  37     var req= [ 'hiddenName', 'displayField', 'valueField' ];
  38     var _t = this;
  39     Roo.each(req, function(e) {
  40         if ((typeof(_t[e]) == 'undefined' ) || !_t[e].length) {
  41             throw "Roo.form.ComboNested : missing value for: " + e;
  42         }
  43     });
  44
  45
  46 };
  47
  48 Roo.extend(Roo.form.ComboNested, Roo.form.ComboBox, {
  49
  50
  51     list : null, // the outermost div..
  52     innerLists : null, // the
  53     views : null,
  54     stores : null,
  55     // private
  56     onRender : function(ct, position)
  57     {
  58         Roo.form.ComboBox.superclass.onRender.call(this, ct, position); // skip parent call - got to above..
  59
  60         if(this.hiddenName){
  61             this.hiddenField = this.el.insertSibling({tag:'input', type:'hidden', name: this.hiddenName, id:  (this.hiddenId||this.hiddenName)},
  62                     'before', true);
  63             this.hiddenField.value =
  64                 this.hiddenValue !== undefined ? this.hiddenValue :
  65                 this.value !== undefined ? this.value : '';
  66
  67             // prevent input submission
  68             this.el.dom.removeAttribute('name');
  69
  70
  71         }
  72
  73         if(Roo.isGecko){
  74             this.el.dom.setAttribute('autocomplete', 'off');
  75         }
  76
  77         var cls = 'x-combo-list';
  78
  79         this.list = new Roo.Layer({
  80             shadow: this.shadow, cls: [cls, this.listClass].join(' '), constrain:false
  81         });
  82
  83         var lw = this.listWidth || Math.max(this.wrap.getWidth(), this.minListWidth);
  84         this.list.setWidth(lw);
  85         this.list.swallowEvent('mousewheel');
  86         this.assetHeight = 0;
  87
  88         if(this.title){
  89             this.header = this.list.createChild({cls:cls+'-hd', html: this.title});
  90             this.assetHeight += this.header.getHeight();
  91         }
  92         this.innerLists = [];
  93         this.views = [];
  94         this.stores = [];
  95         for (var i =0 ; i < 3; i++) {
  96             this.onRenderList( cls, i);
  97         }
  98
  99         if(this.allowBlank && !this.disableClear){
 100             this.footer = this.list.createChild({cls:cls+'-ft'});
 101             this.pageTb = new Roo.Toolbar(this.footer);
 102         }
 103
 104
 105         if (this.pageTb && this.allowBlank && !this.disableClear) {
 106             var _this = this;
 107             this.pageTb.add(new Roo.Toolbar.Fill(), {
 108                 cls: 'x-btn-icon x-btn-clear',
 109                 text: '&#160;',
 110                 handler: function()
 111                 {
 112                     _this.collapse();
 113                     _this.clearValue();
 114                     _this.onSelect(false, -1);
 115                 }
 116             });
 117         }
 118         if (this.footer) {
 119             this.assetHeight += this.footer.getHeight();
 120         }
 121
 122     },
 123     onRenderList : function (  cls, i)
 124     {
 125
 126         var lw = Math.floor(
 127                 ((this.listWidth || Math.max(this.wrap.getWidth(), this.minListWidth)) - this.list.getFrameWidth('lr')) / 3
 128             );;
 129
 130         var il = this.innerLists[i] = this.list.createChild({cls:cls+'-inner'});
 131         //il.on('mouseover', this.onViewOver, this, { list:  i });
 132         //il.on('mousemove', this.onViewMove, this, { list:  i });
 133         il.setWidth(lw);
 134
 135
 136         if(!this.tpl){
 137             this.tpl = '<div class="'+cls+'-item">{' + this.displayField + '}</div>';
 138         }
 139
 140         var store  = this.store;
 141         if (i > 0) {
 142             store  = new Roo.data.SimpleStore({
 143                 reader : this.store.reader,
 144                 data : [ ]
 145             });
 146         }
 147         this.stores[i]  = store;
 148
 149
 150
 151         var view = this.views[i] = new Roo.View(
 152             il,
 153             this.tpl,
 154             {
 155                 singleSelect:true,
 156                 store: store,
 157                 selectedClass: this.selectedClass
 158             }
 159         );
 160         view.getEl().setWidth(lw);
 161         view.getEl().setStyle({
 162             position: i < 1 ? 'relative' : 'absolute',
 163             top: 0,
 164             left: (i * lw ) + 'px'
 165         });
 166         view.on('selectionchange', this.onSelectChange, this, {list : i });
 167
 168         //view.on('click', this.onViewClick, this, { list : i });
 169
 170         store.on('beforeload', this.onBeforeLoad, this);
 171         store.on('load', this.onLoad, this);
 172         store.on('loadexception', this.onLoadException, this);
 173
 174
 175
 176
 177
 178     },
 179     onResize : function()  {},
 180
 181     restrictHeight : function()
 182     {
 183         var mh = 0;
 184         Roo.each(this.innerLists, function(il,i) {
 185             var el = this.views[i].getEl();
 186             el.dom.style.height = '';
 187             var inner = el.dom;
 188             var h = Math.max(inner.clientHeight, inner.offsetHeight, inner.scrollHeight);
 189             el.setHeight(h < this.maxHeight ? 'auto' : this.maxHeight);
 190             il.setHeight(h < this.maxHeight ? 'auto' : this.maxHeight);
 191             mh = Math.max(el.getHeight(), mh);
 192         }, this);
 193
 194         this.list.beginUpdate();
 195         this.list.setHeight(mh+this.list.getFrameWidth('tb')+this.assetHeight);
 196         this.list.alignTo(this.el, this.listAlign);
 197         this.list.endUpdate();
 198
 199     },
 200
 201
 202     // -- store handlers..
 203
 204     // private
 205     onLoad : function(a,b,c,d)
 206     {
 207
 208         if(!this.hasFocus){
 209             return;
 210         }
 211
 212         if(this.store.getCount() > 0) {
 213             this.expand();
 214             this.restrictHeight();
 215         } else {
 216             this.onEmptyResults();
 217         }
 218         //this.el.focus();
 219     },
 220     // private
 221     onLoadException : function()
 222     {
 223         this.collapse();
 224         Roo.log(this.store.reader.jsonData);
 225         if (this.store && typeof(this.store.reader.jsonData.errorMsg) != 'undefined') {
 226             Roo.MessageBox.alert("Error loading",this.store.reader.jsonData.errorMsg);
 227         }
 228
 229
 230     } ,
 231
 232
 233
 234     onSelectChange : function (view, sels, opts ) {
 235         var ix = view.getSelectedIndexes();
 236         Roo.log(ix);
 237         var rec = view.store.getAt(ix);
 238         Roo.log(rec);
 239         if (i > 2) {
 240             return;
 241         }
 242         this.stores[opts.list+1].loadData( typeof(rec.data.cn) == 'undefined' ? [] : rec.data.cn);
 243
 244     }
 245
 246
 247 });