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# YUI Library Examples: Paginator: Configuring the Paginator

# Paginator: Configuring the Paginator

In this example we'll demonstrate the use of all of Paginator's configuration options, including the options added by the bundled UI Components. Most notably, we'll use the `template` and `pageLabelBuilder` options to render the pagination controls in a custom layout with more descriptive page links. All content in the left column is generated by the Paginator.

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## Content in a DataTable

We'll use a DataTable instance to handle the content display. We'll use a single container for the Paginator controls, so the starting markup consists of two empty `<div>`s.

<div id="demo"> <div id="pag"></div> <div id="tbl"></div> </div>

## Add Pagination

Create some functions that will be passed to some Paginator configuration attributes. Then create the Paginator using configuration entries for everything under the sun, providing default values in many cases.

YAHOO.util.Event.onDOMReady(function () { var Ex = YAHOO.namespace('example'); // Custom function we'll use for the page links Ex.buildPageLabel = function (recs) { ... }; // Paginator configurations Ex.config = { // REQUIRED rowsPerPage : 20, // REQUIRED, but DataTable will default if not provided containers : 'pag', // If not provided, there is no last page or total pages. // DataTable will set this in the DataSource callback, so this is // redundant. totalRecords : Ex.data.areacodes.length, // page to activate at load initialPage : 3, // Class the element(s) that will contain the controls containerClass : 'yui-pg-container', // default // etc, etc. See full code listing for all configuration ... }; // Create the Paginator for our DataTable to use Ex.paginator = new YAHOO.widget.Paginator(Ex.config);

## Create the DataTable and render

Create the DataSource and DataTable by typical means. DataTable will call the Paginator's `render` method from within its own.

// Normal DataTable configuration Ex.tableCols = [ {key:"state", label:"State", minWidth: 150}, {key:"areacode", label:"Code", width: 30}]; Ex.dataSource = new YAHOO.util.DataSource(Ex.data.areacodes, { responseType : YAHOO.util.DataSource.TYPE_JSARRAY; responseSchema : { fields : ["state","areacode"] } }); // Pass the Paginator in the DataTable config Ex.tableConfig = { paginator : Ex.paginator, caption : 'Area Codes by State' }; Ex.dataTable = new YAHOO.widget.DataTable('tbl', Ex.tableCols, Ex.dataSource, Ex.tableConfig);

## Full Code Listing

### JavaScript

YAHOO.util.Event.onDOMReady(function () { var Ex = YAHOO.namespace('example'); // Sort our data by state, then area code Ex.data.areacodes.sort(function (a,b) { return YAHOO.util.Sort.compare(a.state,b.state) || YAHOO.util.Sort.compare(a.areacode,b.areacode); }); // Custom function we'll use for the page links Ex.buildPageLabel = function (recs) { var data = Ex.data.areacodes, start = recs[0], end = recs[1]; // Nested function to find the smallest substring // to indicate how two strings differ var diffNames = function (a,b) { var aa = a.state.toLowerCase(), bb = b.state.toLowerCase(); for (var i = 0, len = aa.length; i < len; ++i) { if (aa.charAt(i) !== bb.charAt(i)) { return a.state.substr(0,i+1); } } return a.state + ' ('+a.areacode+')'; }; // Build label as "A - C" or "Abc - Def" var label = ''; if (!start) { label = data[0].state.substr(0,2) + ' - '; } else { label = diffNames(data[start], data[start-1]) + ' - '; } if (data[end+1]) { label += diffNames(data[end], data[end+1]); } else { label += diffNames(data[end], data[start]); } return label; }; // Paginator configurations Ex.config = { // REQUIRED rowsPerPage : 20, // REQUIRED, but DataTable will default if not provided containers : 'pag', // If not provided, there is no last page or total pages. // DataTable will set this in the DataSource callback, so this is // redundant. totalRecords : Ex.data.areacodes.length, // page to activate at load initialPage : 3, // Class the element(s) that will contain the controls containerClass : 'yui-pg-container', // default // Define the innerHTML of the container(s) using placeholders // to identify where the controls will be located template : '<h3>Now showing:</h3>' + '<p>{CurrentPageReport}</p>' + '<p class="pg-nav">' + '{FirstPageLink} {PreviousPageLink} ' + '{NextPageLink} {LastPageLink}' + '</p>' + '<label>Page size: {RowsPerPageDropdown}</label>' + '<h3>Directory</h3>' + '{PageLinks}', // If there is less data than would display on one page, pagination // controls can be omitted by setting this to false. alwaysVisible : true, // default // Override setPage (et al) to immediately update internal values // and update the pagination controls in response to user actions. // Default is false; requests are delegated through the changeRequest // event subscriber. updateOnChange : false, // default // Options for FirstPageLink component firstPageLinkLabel : "<<", firstPageLinkClass : "yui-pg-first", // default // Options for LastPageLink component lastPageLinkLabel : ">>", lastPageLinkClass : "yui-pg-last", // default // Options for PreviousPageLink component previousPageLinkLabel : "< previous", previousPageLinkClass : "yui-pg-previous", // default // Options for NextPageLink component nextPageLinkLabel : "next >", // default nextPageLinkClass : "yui-pg-next", // default // Options for PageLinks component pageLinksContainerClass : 'yui-pg-pages', // default pageLinkClass : 'yui-pg-page', // default currentPageClass : 'yui-pg-current-page', // default // Display a maximum of X page links. Use // YAHOO.widget.Paginator.VALUE_UNLIMITED to show all page links pageLinks : YAHOO.widget.Paginator.VALUE_UNLIMITED, // Create custom page link labels pageLabelBuilder : function (page,paginator) { return Ex.buildPageLabel(paginator.getPageRecords(page)); }, // Options for RowsPerPageDropdown component rowsPerPageDropdownClass : "yui-pg-rpp-options", // default rowsPerPageOptions : [ { value : 20, text : "small" }, { value : 40, text : "medium" }, { value : 100, text : "large" } ], // Options for CurrentPageReport component pageReportClass : 'yui-pg-current', // default // Provide a key:value map for use by the pageReportTemplate. // Unlikely this will need to be customized; see API docs for the // template keys made available by the default value generator pageReportValueGenerator : function (paginator) { var recs = paginator.getPageRecords(); return { start : Ex.data.areacodes[recs[0]].state, end : Ex.data.areacodes[recs[1]].state }; }, // How to render the notification of the Paginator's current state pageReportTemplate : '{start} - {end}' }; // Create the Paginator for our DataTable to use Ex.paginator = new YAHOO.widget.Paginator(Ex.config); // Normal DataTable configuration Ex.tableCols = [ {key:"state", label:"State", minWidth: 150}, {key:"areacode", label:"Code", width: 30}]; Ex.dataSource = new YAHOO.util.DataSource(Ex.data.areacodes, { responseType : YAHOO.util.DataSource.TYPE_JSARRAY, responseSchema : { fields : ["state","areacode"] } }); // Pass the Paginator in the DataTable config Ex.tableConfig = { paginator : Ex.paginator, caption : 'Area Codes by State' }; Ex.dataTable = new YAHOO.widget.DataTable('tbl', Ex.tableCols, Ex.dataSource, Ex.tableConfig); });

### CSS

#demo { width: 525px; } #pag { display: inline; float: left; width: 250px; margin-top: 0; } #pag a { color: #0000de; text-decoration: underline; padding: .5ex 0; } #pag label { display: block; margin: 1ex 0; } #pag p { margin: .25ex 0; } .yui-skin-sam #pag .yui-pg-pages { display: block; } .yui-skin-sam #pag .yui-pg-page { display: block; background-color: #f1f6f7; background: transparent; border: none; white-space: normal; } .yui-skin-sam #pag .yui-pg-current-page { padding: .5ex 0; background-color: #ffe; font-style: italic; } .yui-skin-sam #pag .yui-pg-current { margin: 0; white-space: normal; font-weight: bold; font-size: 113%; } .yui-skin-sam #demo .yui-dt caption { margin: 0.2em 0 0; color: #e76300; font-weight: bold; }

## Configuration for This Example

You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.

### YUI Logger Output:

Note: Logging and debugging is currently turned off for this example.

Reload with logging
and debugging enabled.

### Paginator Examples:

### More Paginator Resources:

- User's Guide (external)
- API Documentation

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