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<pre class="prettyprint lang-js"><span id='Ext-grid-ColumnManager'>/**
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</span> * @private
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*
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* Manages and provides information about a TablePanel's *visible leaf* columns.
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*/
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Ext.define('Ext.grid.ColumnManager', {
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alternateClassName: ['Ext.grid.ColumnModel'],
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<span id='Ext-grid-ColumnManager-property-columns'> columns: null,
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</span>
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<span id='Ext-grid-ColumnManager-method-constructor'> constructor: function(headerCt, secondHeaderCt) {
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</span> //<debug>
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if (!headerCt.isRootHeader) {
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Ext.Error.raise('ColumnManager must be passed an instantiated HeaderContainer');
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}
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//</debug>
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this.headerCt = headerCt;
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// We are managing columns for a lockable grid...
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if (secondHeaderCt) {
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//<debug>
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if (!headerCt.isRootHeader) {
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Ext.Error.raise('ColumnManager must be passed an instantiated HeaderContainer');
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}
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//</debug>
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this.secondHeaderCt = secondHeaderCt;
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}
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},
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<span id='Ext-grid-ColumnManager-method-getColumns'> getColumns: function() {
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</span> if (!this.columns) {
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this.cacheColumns();
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}
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return this.columns;
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},
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<span id='Ext-grid-ColumnManager-method-getHeaderIndex'> /**
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</span> * Returns the index of a leaf level header regardless of what the nesting
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* structure is.
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*
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* If a group header is passed, the index of the first leaf level heder within it is returned.
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*
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* @param {Ext.grid.column.Column} header The header to find the index of
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* @return {Number} The index of the specified column header
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*/
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getHeaderIndex: function(header) {
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// If we are being asked the index of a group header, find the first leaf header node, and return the index of that
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if (header.isGroupHeader) {
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header = header.down(':not([isGroupHeader])');
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}
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return Ext.Array.indexOf(this.getColumns(), header);
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},
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<span id='Ext-grid-ColumnManager-method-getHeaderAtIndex'> /**
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</span> * Get a leaf level header by index regardless of what the nesting
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* structure is.
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* @param {Number} index The column index for which to retrieve the column.
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* @return {Ext.grid.column.Column} The header. `null` if it doesn't exist.
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*/
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getHeaderAtIndex: function(index) {
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var columns = this.getColumns();
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return columns.length ? columns[index] : null;
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},
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<span id='Ext-grid-ColumnManager-method-getHeaderById'> /**
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</span> * Get a leaf level header by index regardless of what the nesting
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* structure is.
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* @param {String} id The id
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* @return {Ext.grid.column.Column} The header. `null` if it doesn't exist.
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*/
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getHeaderById: function(id) {
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var columns = this.getColumns(),
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len = columns.length,
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i, header;
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for (i = 0; i < len; ++i) {
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header = columns[i];
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if (header.getItemId() === id) {
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return header;
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}
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}
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return null;
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},
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<span id='Ext-grid-ColumnManager-method-getVisibleHeaderClosestToIndex'> /**
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</span> * When passed a column index, returns the closet *visible* column to that. If the column at the passed index is visible,
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* that is returned. If it is hidden, either the next visible, or the previous visible column is returned.
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* @param {Number} index Position at which to find the closest visible column.
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*/
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getVisibleHeaderClosestToIndex: function(index) {
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var result = this.getHeaderAtIndex(index);
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if (result && result.hidden) {
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result = result.next(':not([hidden])') || result.prev(':not([hidden])');
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}
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return result;
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},
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<span id='Ext-grid-ColumnManager-method-cacheColumns'> cacheColumns: function() {
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</span> this.columns = this.headerCt.getVisibleGridColumns();
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if (this.secondHeaderCt) {
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Ext.Array.push(this.columns, this.secondHeaderCt.getVisibleGridColumns());
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}
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},
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<span id='Ext-grid-ColumnManager-method-invalidate'> invalidate: function() {
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</span> this.columns = null;
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// If we are part of a lockable assembly, invalidate the root column manager
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if (this.rootColumns) {
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this.rootColumns.invalidate();
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}
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}
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}, function() {
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this.createAlias('indexOf', 'getHeaderIndex');
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});</pre>
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