ColumnModel.js
/**
* @class Ext.grid.ColumnModel
* @extends Ext.util.Observable
* This is the default implementation of a ColumnModel used by the Grid. It defines
* the columns in the grid.
* <br>Usage:<br>
<pre><code>
var colModel = new Ext.grid.ColumnModel([
{header: "Ticker", width: 60, sortable: true, locked: true},
{header: "Company Name", width: 150, sortable: true},
{header: "Market Cap.", width: 100, sortable: true},
{header: "$ Sales", width: 100, sortable: true, renderer: money},
{header: "Employees", width: 100, sortable: true, resizable: false}
]);
</code></pre>
* <p>
* The config options listed for this class, are options which may appear in each
* individual column definition.
* @constructor
* @param {Object} config An Array of column config objects. See this class's
* config objects for details.
*/
Ext.grid.ColumnModel = function(config){
Ext.grid.ColumnModel.superclass.constructor.call(this);
/**
* The config passed into the constructor
*/
this.config = config;
this.lookup = {};
// if id, create one
// if the column does not have a dataIndex mapping,
// map it to the order it is in the config
for(var i = 0, len = config.length; i < len; i++){
if(typeof config[i].dataIndex == "undefined"){
config[i].dataIndex = i;
}
if(typeof config[i].renderer == "string"){
config[i].renderer = Ext.util.Format[config[i].renderer];
}
if(typeof config[i].id == "undefined"){
config[i].id = i;
}
this.lookup[config[i].id] = config[i];
}
/**
* The width of columns which have no width specified (defaults to 100)
* @type Number
*/
this.defaultWidth = 100;
/**
* Default sortable of columns which have no sortable specified (defaults to false)
* @type Boolean
*/
this.defaultSortable = false;
this.addEvents({
/**
* @event widthchange
* Fires when the width of a column changes
* @param {ColumnModel} this
* @param {Number} columnIndex The column index
* @param {Number} newWidth The new width
*/
"widthchange": true,
/**
* @event headerchange
* Fires when the text of a header changes
* @param {ColumnModel} this
* @param {Number} columnIndex The column index
* @param {Number} newText The new header text
*/
"headerchange": true,
/**
* @event hiddenchange
* Fires when a column is hidden or "unhidden"
* @param {ColumnModel} this
* @param {Number} columnIndex The column index
* @param {Number} hidden true if hidden, false otherwise
*/
"hiddenchange": true,
/**
* @event columnmoved
* Fires when a column is moved
* @param {ColumnModel} this
* @param {Number} oldIndex
* @param {Number} newIndex
*/
"columnmoved" : true,
/**
* @event columlockchange
* Fires when a column's locked state is changed
* @param {ColumnModel} this
* @param {Number} colIndex
* @param {Boolean} locked true if locked
*/
"columnlockchange" : true
});
Ext.grid.ColumnModel.superclass.constructor.call(this);
};
Ext.extend(Ext.grid.ColumnModel, Ext.util.Observable, {
/**
* @cfg header {String} The header text to display in the Grid view.
*/
// holder
/***
* @cfg dataIndex {String} The name of the field in the grid's {@link Ext.data.Store}'s
* {@link Ext.data.Record} definition from which to draw the column's value. If not
* specified, the column's index is used as an index into the Record's data Array.
*/
// holder
/***
* @cfg width {Number} （可选） The initial width in pixels of the column. Using this
* instead of {@link Ext.grid.Grid#autoSizeColumns} is more efficient.
*/
// holder
/***
* @cfg sortable {Boolean} True if sorting is to be allowed on this column. Defaults to true.
* Whether local/remote sorting is used is specified in {@link Ext.data.Store#remoteSort}.
*/
// holder
/***
* @cfg locked {Boolean} True to lock the column in place while scrolling the Grid.
* Defaults to false.
*/
// holder
/***
* @cfg resizable {Boolean} False to disable column resizing. Defaults to true.
*/
// holder
/***
* @cfg renderer {Function} （可选） A function used to generate HTML markup for a cell
* given the cell's data value. See {@link #setRenderer}. If not specified, the
* default renderer uses the raw data value.
*/
// holder
/***
* Returns the id of the column at the specified index
* @param {Number} index
* @return {String} the id
*/
getColumnId : function(index){
return this.config[index].id;
},
getColumnById : function(id){
return this.lookup[id];
},
getIndexById : function(id){
for(var i = 0, len = this.config.length; i < len; i++){
if(this.config[i].id == id){
return i;
}
}
return -1;
},
moveColumn : function(oldIndex, newIndex){
var c = this.config[oldIndex];
this.config.splice(oldIndex, 1);
this.config.splice(newIndex, 0, c);
this.dataMap = null;
this.fireEvent("columnmoved", this, oldIndex, newIndex);
},
isLocked : function(colIndex){
return this.config[colIndex].locked === true;
},
setLocked : function(colIndex, value, suppressEvent){
if(this.isLocked(colIndex) == value){
return;
}
this.config[colIndex].locked = value;
if(!suppressEvent){
this.fireEvent("columnlockchange", this, colIndex, value);
}
},
getTotalLockedWidth : function(){
var totalWidth = 0;
for(var i = 0; i < this.config.length; i++){
if(this.isLocked(i) && !this.isHidden(i)){
this.totalWidth += this.getColumnWidth(i);
}
}
return totalWidth;
},
getLockedCount : function(){
for(var i = 0, len = this.config.length; i < len; i++){
if(!this.isLocked(i)){
return i;
}
}
},
/**
* Returns the number of columns.
* @return {Number}
*/
getColumnCount : function(visibleOnly){
if(visibleOnly == true){
var c = 0;
for(var i = 0, len = this.config.length; i < len; i++){
if(!this.isHidden(i)){
c++;
}
}
return c;
}
return this.config.length;
},
/**
* Returns true if the specified column is sortable.
* @param {Number} col The column index
* @return {Boolean}
*/
isSortable : function(col){
if(typeof this.config[col].sortable == "undefined"){
return this.defaultSortable;
}
return this.config[col].sortable;
},
/**
* Returns the rendering (formatting) function defined for the column.
* @param {Number} col The column index.
* @return {Function} The function used to render the cell. See {@link #setRenderer}.
*/
getRenderer : function(col){
if(!this.config[col].renderer){
return Ext.grid.ColumnModel.defaultRenderer;
}
return this.config[col].renderer;
},
/**
* Sets the rendering (formatting) function for a column.
* @param {Number} col The column index
* @param {Function} fn The function to use to process the cell's raw data
* to return HTML markup for the grid view. The render function is called with
* the following parameters:<ul>
* <li>Data value.</li>
* <li>Cell metadata. An object in which you may set the following attributes:<ul>
* <li>css A CSS style string to apply to the table cell.</li>
* <li>attr An HTML attribute definition string to apply to the data container element <i>within</i> the table cell.</li></ul>
* <li>The {@link Ext.data.Record} from which the data was extracted.</li>
* <li>Row index</li>
* <li>Column index</li>
* <li>The {@link Ext.data.Store} object from which the Record was extracted</li></ul>
*/
setRenderer : function(col, fn){
this.config[col].renderer = fn;
},
/**
* Returns the width for the specified column.
* @param {Number} col The column index
* @return {Number}
*/
getColumnWidth : function(col){
return this.config[col].width || this.defaultWidth;
},
/**
* Sets the width for a column.
* @param {Number} col The column index
* @param {Number} width The new width
*/
setColumnWidth : function(col, width, suppressEvent){
this.config[col].width = width;
this.totalWidth = null;
if(!suppressEvent){
this.fireEvent("widthchange", this, col, width);
}
},
/**
* Returns the total width of all columns.
* @param {Boolean} includeHidden True to include hidden column widths
* @return {Number}
*/
getTotalWidth : function(includeHidden){
if(!this.totalWidth){
this.totalWidth = 0;
for(var i = 0, len = this.config.length; i < len; i++){
if(includeHidden || !this.isHidden(i)){
this.totalWidth += this.getColumnWidth(i);
}
}
}
return this.totalWidth;
},
/**
* Returns the header for the specified column.
* @param {Number} col The column index
* @return {String}
*/
getColumnHeader : function(col){
return this.config[col].header;
},
/**
* Sets the header for a column.
* @param {Number} col The column index
* @param {String} header The new header
*/
setColumnHeader : function(col, header){
this.config[col].header = header;
this.fireEvent("headerchange", this, col, header);
},
/**
* Returns the tooltip for the specified column.
* @param {Number} col The column index
* @return {String}
*/
getColumnTooltip : function(col){
return this.config[col].tooltip;
},
/**
* Sets the tooltip for a column.
* @param {Number} col The column index
* @param {String} tooltip The new tooltip
*/
setColumnTooltip : function(col, tooltip){
this.config[col].tooltip = tooltip;
},
/**
* Returns the dataIndex for the specified column.
* @param {Number} col The column index
* @return {Number}
*/
getDataIndex : function(col){
return this.config[col].dataIndex;
},
/**
* Sets the dataIndex for a column.
* @param {Number} col The column index
* @param {Number} dataIndex The new dataIndex
*/
setDataIndex : function(col, dataIndex){
this.config[col].dataIndex = dataIndex;
},
findColumnIndex : function(dataIndex){
var c = this.config;
for(var i = 0, len = c.length; i < len; i++){
if(c[i].dataIndex == dataIndex){
return i;
}
}
return -1;
},
/**
* Returns true if the cell is editable.
* @param {Number} colIndex The column index
* @param {Number} rowIndex The row index
* @return {Boolean}
*/
isCellEditable : function(colIndex, rowIndex){
return (this.config[colIndex].editable || (typeof this.config[colIndex].editable == "undefined" && this.config[colIndex].editor)) ? true : false;
},
/**
* Returns the editor defined for the cell/column.
* @param {Number} colIndex The column index
* @param {Number} rowIndex The row index
* @return {Object}
*/
getCellEditor : function(colIndex, rowIndex){
return this.config[colIndex].editor;
},
/**
* Sets if a column is editable.
* @param {Number} col The column index
* @param {Boolean} editable True if the column is editable
*/
setEditable : function(col, editable){
this.config[col].editable = editable;
},
/**
* Returns true if the column is hidden.
* @param {Number} colIndex The column index
* @return {Boolean}
*/
isHidden : function(colIndex){
return this.config[colIndex].hidden;
},
/**
* Returns true if the column width cannot be changed
*/
isFixed : function(colIndex){
return this.config[colIndex].fixed;
},
/**
* Returns true if the column cannot be resized
* @return {Boolean}
*/
isResizable : function(colIndex){
return this.config[colIndex].resizable !== false;
},
/**
* Sets if a column is hidden.
* @param {Number} colIndex The column index
* @param {Boolean} hidden True if the column is hidden
*/
setHidden : function(colIndex, hidden){
this.config[colIndex].hidden = hidden;
this.totalWidth = null;
this.fireEvent("hiddenchange", this, colIndex, hidden);
},
/**
* Sets the editor for a column.
* @param {Number} col The column index
* @param {Object} editor The editor object
*/
setEditor : function(col, editor){
this.config[col].editor = editor;
}
});
Ext.grid.ColumnModel.defaultRenderer = function(value){
if(typeof value == "string" && value.length < 1){
return " ";
}
return value;
};
// Alias for backwards compatibility
Ext.grid.DefaultColumnModel = Ext.grid.ColumnModel;
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