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132 lines
4.1 KiB
JavaScript
132 lines
4.1 KiB
JavaScript
/**
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* @class YAHOO.ext.grid.AbstractColumnModel
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* @extends YAHOO.ext.util.Observable
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* This abstract class defines the ColumnModel interface and provides default implementations of the events required by the Grid.
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* @constructor
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*/
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YAHOO.ext.grid.AbstractColumnModel = function(){
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// legacy events
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this.onWidthChange = new YAHOO.util.CustomEvent('widthChanged');
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this.onHeaderChange = new YAHOO.util.CustomEvent('headerChanged');
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this.onHiddenChange = new YAHOO.util.CustomEvent('hiddenChanged');
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this.events = {
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/**
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* @event widthchange
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* Fires when the width of a column changes
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* @param {ColumnModel} this
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* @param {Number} columnIndex The column index
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* @param {Number} newWidth The new width
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*/
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'widthchange': this.onWidthChange,
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/**
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* @event headerchange
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* Fires when the text of a header changes
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* @param {ColumnModel} this
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* @param {Number} columnIndex The column index
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* @param {Number} newText The new header text
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*/
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'headerchange': this.onHeaderChange,
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/**
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* @event hiddenchange
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* Fires when a column is hidden or "unhidden"
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* @param {ColumnModel} this
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* @param {Number} columnIndex The column index
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* @param {Number} hidden true if hidden, false otherwise
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*/
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'hiddenchange': this.onHiddenChange
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};
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};
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YAHOO.ext.grid.AbstractColumnModel.prototype = {
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fireEvent : YAHOO.ext.util.Observable.prototype.fireEvent,
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on : YAHOO.ext.util.Observable.prototype.on,
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addListener : YAHOO.ext.util.Observable.prototype.addListener,
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delayedListener : YAHOO.ext.util.Observable.prototype.delayedListener,
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removeListener : YAHOO.ext.util.Observable.prototype.removeListener,
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purgeListeners : YAHOO.ext.util.Observable.prototype.purgeListeners,
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bufferedListener : YAHOO.ext.util.Observable.prototype.bufferedListener,
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fireWidthChange : function(colIndex, newWidth){
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this.onWidthChange.fireDirect(this, colIndex, newWidth);
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},
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fireHeaderChange : function(colIndex, newHeader){
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this.onHeaderChange.fireDirect(this, colIndex, newHeader);
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},
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fireHiddenChange : function(colIndex, hidden){
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this.onHiddenChange.fireDirect(this, colIndex, hidden);
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},
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/**
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* Interface method - Returns the number of columns.
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* @return {Number}
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*/
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getColumnCount : function(){
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return 0;
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},
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/**
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* Interface method - Returns true if the specified column is sortable.
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* @param {Number} col The column index
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* @return {Boolean}
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*/
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isSortable : function(col){
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return false;
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},
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/**
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* Interface method - Returns true if the specified column is hidden.
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* @param {Number} col The column index
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* @return {Boolean}
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*/
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isHidden : function(col){
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return false;
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},
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/**
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* Interface method - Returns the sorting comparison function defined for the column (defaults to sortTypes.none).
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* @param {Number} col The column index
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* @return {Function}
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*/
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getSortType : function(col){
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return YAHOO.ext.grid.DefaultColumnModel.sortTypes.none;
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},
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/**
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* Interface method - Returns the rendering (formatting) function defined for the column.
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* @param {Number} col The column index
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* @return {Function}
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*/
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getRenderer : function(col){
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return YAHOO.ext.grid.DefaultColumnModel.defaultRenderer;
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},
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/**
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* Interface method - Returns the width for the specified column.
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* @param {Number} col The column index
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* @return {Number}
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*/
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getColumnWidth : function(col){
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return 0;
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},
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/**
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* Interface method - Returns the total width of all columns.
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* @return {Number}
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*/
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getTotalWidth : function(){
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return 0;
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},
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/**
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* Interface method - Returns the header for the specified column.
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* @param {Number} col The column index
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* @return {String}
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*/
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getColumnHeader : function(col){
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return '';
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}
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};
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