3 * Copyright(c) 2006-2009 Ext JS, LLC
5 * http://www.extjs.com/license
8 * @class Ext.grid.ColumnModel
9 * @extends Ext.util.Observable
10 * <p>After the data has been read into the client side cache (<b>{@link Ext.data.Store Store}</b>),
11 * the ColumnModel is used to configure how and what parts of that data will be displayed in the
12 * vertical slices (columns) of the grid. The Ext.grid.ColumnModel Class is the default implementation
13 * of a ColumnModel used by implentations of {@link Ext.grid.GridPanel GridPanel}.</p>
14 * <p>Data is mapped into the store's records and then indexed into the ColumnModel using the
15 * <tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt>:</p>
17 {data source} == mapping ==> {data store} == <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b> ==> {ColumnModel}
19 * <p>Each {@link Ext.grid.Column Column} in the grid's ColumnModel is configured with a
20 * <tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt> to specify how the data within
21 * each record in the store is indexed into the ColumnModel.</p>
22 * <p>There are two ways to initialize the ColumnModel class:</p>
23 * <p><u>Initialization Method 1: an Array</u></p>
25 var colModel = new Ext.grid.ColumnModel([
26 { header: "Ticker", width: 60, sortable: true},
27 { header: "Company Name", width: 150, sortable: true, id: 'company'},
28 { header: "Market Cap.", width: 100, sortable: true},
29 { header: "$ Sales", width: 100, sortable: true, renderer: money},
30 { header: "Employees", width: 100, sortable: true, resizable: false}
33 * <p>The ColumnModel may be initialized with an Array of {@link Ext.grid.Column} column configuration
34 * objects to define the initial layout / display of the columns in the Grid. The order of each
35 * {@link Ext.grid.Column} column configuration object within the specified Array defines the initial
36 * order of the column display. A Column's display may be initially hidden using the
37 * <tt>{@link Ext.grid.Column#hidden hidden}</tt></b> config property (and then shown using the column
38 * header menu). Field's that are not included in the ColumnModel will not be displayable at all.</p>
39 * <p>How each column in the grid correlates (maps) to the {@link Ext.data.Record} field in the
40 * {@link Ext.data.Store Store} the column draws its data from is configured through the
41 * <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b>. If the
42 * <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b> is not explicitly defined (as shown in the
43 * example above) it will use the column configuration's index in the Array as the index.</p>
44 * <p>See <b><tt>{@link Ext.grid.Column}</tt></b> for additional configuration options for each column.</p>
45 * <p><u>Initialization Method 2: an Object</u></p>
46 * <p>In order to use configuration options from <tt>Ext.grid.ColumnModel</tt>, an Object may be used to
47 * initialize the ColumnModel. The column configuration Array will be specified in the <tt><b>{@link #columns}</b></tt>
48 * config property. The <tt><b>{@link #defaults}</b></tt> config property can be used to apply defaults
49 * for all columns, e.g.:</p><pre><code>
50 var colModel = new Ext.grid.ColumnModel({
52 { header: "Ticker", width: 60, menuDisabled: false},
53 { header: "Company Name", width: 150, id: 'company'},
54 { header: "Market Cap."},
55 { header: "$ Sales", renderer: money},
56 { header: "Employees", resizable: false}
64 {@link #hiddenchange}: function(cm, colIndex, hidden) {
65 saveConfig(colIndex, hidden);
70 * <p>In both examples above, the ability to apply a CSS class to all cells in a column (including the
71 * header) is demonstrated through the use of the <b><tt>{@link Ext.grid.Column#id id}</tt></b> config
72 * option. This column could be styled by including the following css:</p><pre><code>
73 //add this css *after* the core css is loaded
75 color: red; // entire column will have red font
77 // modify the header row only, adding an icon to the column header
79 background: transparent
80 url(../../resources/images/icons/silk/building.png)
81 no-repeat 3px 3px ! important;
85 * Note that the "Company Name" column could be specified as the
86 * <b><tt>{@link Ext.grid.GridPanel}.{@link Ext.grid.GridPanel#autoExpandColumn autoExpandColumn}</tt></b>.
88 * @param {Mixed} config Specify either an Array of {@link Ext.grid.Column} configuration objects or specify
89 * a configuration Object (see introductory section discussion utilizing Initialization Method 2 above).
91 Ext.grid.ColumnModel = function(config){
93 * An Array of {@link Ext.grid.Column Column definition} objects representing the configuration
94 * of this ColumnModel. See {@link Ext.grid.Column} for the configuration properties that may
100 Ext.apply(this, config);
101 this.setConfig(config.columns, true);
103 this.setConfig(config, true);
108 * Fires when the width of a column is programmaticially changed using
109 * <code>{@link #setColumnWidth}</code>.
110 * Note internal resizing suppresses the event from firing. See also
111 * {@link Ext.grid.GridPanel}.<code>{@link #columnresize}</code>.
112 * @param {ColumnModel} this
113 * @param {Number} columnIndex The column index
114 * @param {Number} newWidth The new width
118 * @event headerchange
119 * Fires when the text of a header changes.
120 * @param {ColumnModel} this
121 * @param {Number} columnIndex The column index
122 * @param {String} newText The new header text
126 * @event hiddenchange
127 * Fires when a column is hidden or "unhidden".
128 * @param {ColumnModel} this
129 * @param {Number} columnIndex The column index
130 * @param {Boolean} hidden true if hidden, false otherwise
135 * Fires when a column is moved.
136 * @param {ColumnModel} this
137 * @param {Number} oldIndex
138 * @param {Number} newIndex
142 * @event configchange
143 * Fires when the configuration is changed
144 * @param {ColumnModel} this
148 Ext.grid.ColumnModel.superclass.constructor.call(this);
150 Ext.extend(Ext.grid.ColumnModel, Ext.util.Observable, {
152 * @cfg {Number} defaultWidth (optional) The width of columns which have no <tt>{@link #width}</tt>
153 * specified (defaults to <tt>100</tt>). This property shall preferably be configured through the
154 * <tt><b>{@link #defaults}</b></tt> config property.
158 * @cfg {Boolean} defaultSortable (optional) Default sortable of columns which have no
159 * sortable specified (defaults to <tt>false</tt>). This property shall preferably be configured
160 * through the <tt><b>{@link #defaults}</b></tt> config property.
162 defaultSortable: false,
164 * @cfg {Array} columns An Array of object literals. The config options defined by
165 * <b>{@link Ext.grid.Column}</b> are the options which may appear in the object literal for each
166 * individual column definition.
169 * @cfg {Object} defaults Object literal which will be used to apply {@link Ext.grid.Column}
170 * configuration options to all <tt><b>{@link #columns}</b></tt>. Configuration options specified with
171 * individual {@link Ext.grid.Column column} configs will supersede these <tt><b>{@link #defaults}</b></tt>.
175 * Returns the id of the column at the specified index.
176 * @param {Number} index The column index
177 * @return {String} the id
179 getColumnId : function(index){
180 return this.config[index].id;
183 getColumnAt : function(index){
184 return this.config[index];
188 * <p>Reconfigures this column model according to the passed Array of column definition objects.
189 * For a description of the individual properties of a column definition object, see the
190 * <a href="#Ext.grid.ColumnModel-configs">Config Options</a>.</p>
191 * <p>Causes the {@link #configchange} event to be fired. A {@link Ext.grid.GridPanel GridPanel}
192 * using this ColumnModel will listen for this event and refresh its UI automatically.</p>
193 * @param {Array} config Array of Column definition objects.
194 * @param {Boolean} initial Specify <tt>true</tt> to bypass cleanup which deletes the <tt>totalWidth</tt>
195 * and destroys existing editors.
197 setConfig : function(config, initial){
199 if(!initial){ // cleanup
200 delete this.totalWidth;
201 for(i = 0, len = this.config.length; i < len; i++){
209 // backward compatibility
210 this.defaults = Ext.apply({
211 width: this.defaultWidth,
212 sortable: this.defaultSortable
215 this.config = config;
217 // if no id, create one
218 for(i = 0, len = config.length; i < len; i++){
219 c = Ext.applyIf(config[i], this.defaults);
221 var cls = Ext.grid.Column.types[c.xtype || 'gridcolumn'];
225 this.lookup[c.id] = c;
228 this.fireEvent('configchange', this);
233 * Returns the column for a specified id.
234 * @param {String} id The column id
235 * @return {Object} the column
237 getColumnById : function(id){
238 return this.lookup[id];
242 * Returns the index for a specified column id.
243 * @param {String} id The column id
244 * @return {Number} the index, or -1 if not found
246 getIndexById : function(id){
247 for(var i = 0, len = this.config.length; i < len; i++){
248 if(this.config[i].id == id){
256 * Moves a column from one position to another.
257 * @param {Number} oldIndex The index of the column to move.
258 * @param {Number} newIndex The position at which to reinsert the coolumn.
260 moveColumn : function(oldIndex, newIndex){
261 var c = this.config[oldIndex];
262 this.config.splice(oldIndex, 1);
263 this.config.splice(newIndex, 0, c);
265 this.fireEvent("columnmoved", this, oldIndex, newIndex);
269 * Returns the number of columns.
270 * @param {Boolean} visibleOnly Optional. Pass as true to only include visible columns.
273 getColumnCount : function(visibleOnly){
274 if(visibleOnly === true){
276 for(var i = 0, len = this.config.length; i < len; i++){
277 if(!this.isHidden(i)){
283 return this.config.length;
287 * Returns the column configs that return true by the passed function that is called
288 * with (columnConfig, index)
290 // returns an array of column config objects for all hidden columns
291 var columns = grid.getColumnModel().getColumnsBy(function(c){
295 * @param {Function} fn
296 * @param {Object} scope (optional)
297 * @return {Array} result
299 getColumnsBy : function(fn, scope){
301 for(var i = 0, len = this.config.length; i < len; i++){
302 var c = this.config[i];
303 if(fn.call(scope||this, c, i) === true){
311 * Returns true if the specified column is sortable.
312 * @param {Number} col The column index
315 isSortable : function(col){
316 return this.config[col].sortable;
320 * Returns true if the specified column menu is disabled.
321 * @param {Number} col The column index
324 isMenuDisabled : function(col){
325 return !!this.config[col].menuDisabled;
329 * Returns the rendering (formatting) function defined for the column.
330 * @param {Number} col The column index.
331 * @return {Function} The function used to render the cell. See {@link #setRenderer}.
333 getRenderer : function(col){
334 if(!this.config[col].renderer){
335 return Ext.grid.ColumnModel.defaultRenderer;
337 return this.config[col].renderer;
341 * Sets the rendering (formatting) function for a column. See {@link Ext.util.Format} for some
342 * default formatting functions.
343 * @param {Number} col The column index
344 * @param {Function} fn The function to use to process the cell's raw data
345 * to return HTML markup for the grid view. The render function is called with
346 * the following parameters:<ul>
347 * <li><b>value</b> : Object<p class="sub-desc">The data value for the cell.</p></li>
348 * <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
349 * <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
350 * <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
351 * (e.g. 'style="color:red;"').</p></li></ul></p></li>
352 * <li><b>record</b> : Ext.data.record<p class="sub-desc">The {@link Ext.data.Record} from which the data was extracted.</p></li>
353 * <li><b>rowIndex</b> : Number<p class="sub-desc">Row index</p></li>
354 * <li><b>colIndex</b> : Number<p class="sub-desc">Column index</p></li>
355 * <li><b>store</b> : Ext.data.Store<p class="sub-desc">The {@link Ext.data.Store} object from which the Record was extracted.</p></li></ul>
357 setRenderer : function(col, fn){
358 this.config[col].renderer = fn;
362 * Returns the width for the specified column.
363 * @param {Number} col The column index
366 getColumnWidth : function(col){
367 return this.config[col].width;
371 * Sets the width for a column.
372 * @param {Number} col The column index
373 * @param {Number} width The new width
374 * @param {Boolean} suppressEvent True to suppress firing the <code>{@link #widthchange}</code>
375 * event. Defaults to false.
377 setColumnWidth : function(col, width, suppressEvent){
378 this.config[col].width = width;
379 this.totalWidth = null;
381 this.fireEvent("widthchange", this, col, width);
386 * Returns the total width of all columns.
387 * @param {Boolean} includeHidden True to include hidden column widths
390 getTotalWidth : function(includeHidden){
391 if(!this.totalWidth){
393 for(var i = 0, len = this.config.length; i < len; i++){
394 if(includeHidden || !this.isHidden(i)){
395 this.totalWidth += this.getColumnWidth(i);
399 return this.totalWidth;
403 * Returns the header for the specified column.
404 * @param {Number} col The column index
407 getColumnHeader : function(col){
408 return this.config[col].header;
412 * Sets the header for a column.
413 * @param {Number} col The column index
414 * @param {String} header The new header
416 setColumnHeader : function(col, header){
417 this.config[col].header = header;
418 this.fireEvent("headerchange", this, col, header);
422 * Returns the tooltip for the specified column.
423 * @param {Number} col The column index
426 getColumnTooltip : function(col){
427 return this.config[col].tooltip;
430 * Sets the tooltip for a column.
431 * @param {Number} col The column index
432 * @param {String} tooltip The new tooltip
434 setColumnTooltip : function(col, tooltip){
435 this.config[col].tooltip = tooltip;
439 * Returns the dataIndex for the specified column.
441 // Get field name for the column
442 var fieldName = grid.getColumnModel().getDataIndex(columnIndex);
444 * @param {Number} col The column index
445 * @return {String} The column's dataIndex
447 getDataIndex : function(col){
448 return this.config[col].dataIndex;
452 * Sets the dataIndex for a column.
453 * @param {Number} col The column index
454 * @param {String} dataIndex The new dataIndex
456 setDataIndex : function(col, dataIndex){
457 this.config[col].dataIndex = dataIndex;
461 * Finds the index of the first matching column for the given dataIndex.
462 * @param {String} col The dataIndex to find
463 * @return {Number} The column index, or -1 if no match was found
465 findColumnIndex : function(dataIndex){
467 for(var i = 0, len = c.length; i < len; i++){
468 if(c[i].dataIndex == dataIndex){
476 * Returns true if the cell is editable.
478 var store = new Ext.data.Store({...});
479 var colModel = new Ext.grid.ColumnModel({
481 isCellEditable: function(col, row) {
482 var record = store.getAt(row);
483 if (record.get('readonly')) { // replace with your condition
486 return Ext.grid.ColumnModel.prototype.isCellEditable.call(this, col, row);
489 var grid = new Ext.grid.GridPanel({
495 * @param {Number} colIndex The column index
496 * @param {Number} rowIndex The row index
499 isCellEditable : function(colIndex, rowIndex){
500 return (this.config[colIndex].editable || (typeof this.config[colIndex].editable == "undefined" && this.config[colIndex].editor)) ? true : false;
504 * Returns the editor defined for the cell/column.
505 * @param {Number} colIndex The column index
506 * @param {Number} rowIndex The row index
507 * @return {Ext.Editor} The {@link Ext.Editor Editor} that was created to wrap
508 * the {@link Ext.form.Field Field} used to edit the cell.
510 getCellEditor : function(colIndex, rowIndex){
511 return this.config[colIndex].getCellEditor(rowIndex);
515 * Sets if a column is editable.
516 * @param {Number} col The column index
517 * @param {Boolean} editable True if the column is editable
519 setEditable : function(col, editable){
520 this.config[col].editable = editable;
525 * Returns true if the column is hidden.
526 * @param {Number} colIndex The column index
529 isHidden : function(colIndex){
530 return this.config[colIndex].hidden;
535 * Returns true if the column width cannot be changed
537 isFixed : function(colIndex){
538 return this.config[colIndex].fixed;
542 * Returns true if the column can be resized
545 isResizable : function(colIndex){
546 return colIndex >= 0 && this.config[colIndex].resizable !== false && this.config[colIndex].fixed !== true;
549 * Sets if a column is hidden.
551 myGrid.getColumnModel().setHidden(0, true); // hide column 0 (0 = the first column).
553 * @param {Number} colIndex The column index
554 * @param {Boolean} hidden True if the column is hidden
556 setHidden : function(colIndex, hidden){
557 var c = this.config[colIndex];
558 if(c.hidden !== hidden){
560 this.totalWidth = null;
561 this.fireEvent("hiddenchange", this, colIndex, hidden);
566 * Sets the editor for a column and destroys the prior editor.
567 * @param {Number} col The column index
568 * @param {Object} editor The editor object
570 setEditor : function(col, editor){
571 Ext.destroy(this.config[col].editor);
572 this.config[col].editor = editor;
576 * Destroys this column model by purging any event listeners, and removing any editors.
578 destroy : function(){
579 for(var i = 0, c = this.config, len = c.length; i < len; i++){
580 Ext.destroy(c[i].editor);
582 this.purgeListeners();
587 Ext.grid.ColumnModel.defaultRenderer = function(value){
588 if(typeof value == "string" && value.length < 1){