YUI Library Examples: DataTable Control: Polling the DataSource
DataTable Control: Polling the DataSource
This DataTable polls for data from its DataSource every 5 seconds. Due to browser limitations, implementers should use this feature to replace existing data, rather than continuously add data to the page.
count | description | time |
|---|---|---|
Loading... | ||
1 | At the tone the time will be: | 10:55:31 AM |
Sample Code for this Example
Data:
| 1 | [{ |
| 2 | count:n, |
| 3 | description:"At the tone the time will be: ", |
| 4 | time: "[hh]:[mm]:[ss] [AM|PM]") |
| 5 | }] |
| view plain | print | ? |
Markup:
| 1 | <div id="polling"></div> |
| view plain | print | ? |
JavaScript:
| 1 | YAHOO.util.Event.addListener(window, "load", function() { |
| 2 | YAHOO.example.Polling = function() { |
| 3 | var counter = 0; |
| 4 | var dataIncrementer = function() { |
| 5 | counter++; |
| 6 | return [{ |
| 7 | count:counter, |
| 8 | description:"At the tone the time will be: ", |
| 9 | time: YAHOO.util.Date.format(new Date(), {format:"%I:%M:%S %p"}) |
| 10 | }] |
| 11 | }; |
| 12 | |
| 13 | var myColumnDefs = [ |
| 14 | {key: "count"}, |
| 15 | {key: "description"}, |
| 16 | {key: "time"} |
| 17 | ]; |
| 18 | |
| 19 | var myDataSource = new YAHOO.util.DataSource(dataIncrementer); |
| 20 | myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY; |
| 21 | myDataSource.responseSchema = { |
| 22 | fields: ["count", "description", "time"] |
| 23 | }; |
| 24 | |
| 25 | var myDataTable = new YAHOO.widget.DataTable("polling", |
| 26 | myColumnDefs, myDataSource); |
| 27 | |
| 28 | // Set up polling |
| 29 | var myCallback = { |
| 30 | success: myDataTable.onDataReturnInitializeTable, |
| 31 | failure: function() { |
| 32 | YAHOO.log("Polling failure", "error"); |
| 33 | }, |
| 34 | scope: myDataTable |
| 35 | } |
| 36 | myDataSource.setInterval(5000, null, myCallback) |
| 37 | |
| 38 | return { |
| 39 | oDS: myDataSource, |
| 40 | oDT: myDataTable |
| 41 | }; |
| 42 | }(); |
| 43 | }); |
| view plain | print | ? |
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:
Logger Console
INFO 1722ms (+0) 10:55:31 AM:
DataTable instance yui-dt0
Post-render routine executed
INFO 1722ms (+5) 10:55:31 AM:
DataTable instance yui-dt0
DataTable rendered
INFO 1717ms (+0) 10:55:31 AM:
DataSource instance0
Enabling polling to live data for "null" at interval 5000
INFO 1717ms (+1) 10:55:31 AM:
DataTable instance yui-dt0
DataTable message hidden
INFO 1716ms (+0) 10:55:31 AM:
DataTable instance yui-dt0
DataTable rendering...
INFO 1716ms (+0) 10:55:31 AM:
RecordSet instance yui-rs0
Set 1 Record(s) at index 0
INFO 1716ms (+1) 10:55:31 AM:
DataSource instance0
Parsed array data is {results => [{time => 10:55:31 AM, description => At the tone the time will be: , count => 1}]}
INFO 1715ms (+0) 10:55:31 AM:
DataSource instance0
Received live data response for "null"
INFO 1715ms (+0) 10:55:31 AM:
DataSource instance0
Making connection to live data for "null"
INFO 1715ms (+1) 10:55:31 AM:
DataTable instance yui-dt0
DataTable showing message: Loading...
INFO 1714ms (+2) 10:55:31 AM:
DataTable instance yui-dt0
TH cells for 3 keys created
INFO 1712ms (+0) 10:55:31 AM:
RecordSet instance yui-rs0
RecordSet initialized
INFO 1712ms (+1) 10:55:31 AM:
ColumnSet instance yui-cs0
ColumnSet initialized
INFO 1711ms (+8) 10:55:31 AM:
DataSource instance0
DataSource initialized
INFO 1703ms (+1703) 10:55:31 AM:
LogReader instance0
LogReader initialized
INFO 0ms (+0) 10:55:29 AM:
global
Logger initialized
Note: You are viewing this example in debug mode with logging enabled. This can significantly slow performance.
DataTable Control Examples:
- Basic Example
- Progressive Enhancement
- Custom Cell Formatting
- Conditional row coloring
- Nested Headers
- JSON Data Over XHR
- XML Data Over XHR With POST
- Textual Data Over XHR
- Local XML Data
- Polling the DataSource
- Adding, Updating, and Deleting Rows
- Client-side Pagination
- Client-side Sorting
- Server-side Pagination and Sorting for Dynamic Data
- Integrating Browser History Manager with Server-side Pagination and Sorting
- XY-scrolling, Y-scrolling, and X-scrolling
- Row Selection
- Cell Selection
- Inline Cell Editing
- Showing, Hiding, and Reordering Columns.
- Highlighting Cells, Rows, or Columns
- Context Menu Integration
- TabView Integration
- Complex Example of Multiple Features
- Datatable with Autocomplete
- Configuring the Paginator (included with examples for Paginator)
- Skinning Model
- Complex Application (included with examples for Layout Manager)
More DataTable Control Resources:
- User's Guide (external)
- API Documentation
- Cheat Sheet PDF (external)
- Yahoo! UI Library
- Home (external)
- YUIBlog (external)
- YUI Discussion Forum (external)
- YUI on GitHub
- API Documentation
- Functional Examples
- YUI Theater (external)
- YUI License (external)
- YUI Functional Examples
- Animation
- AutoComplete
- Browser History Manager
- Button
- Calendar
- Carousel
- Charts (experimental)
- Color Picker
- Cookie
- Connection Manager
- Container
- DataTable
- Dom
- Drag & Drop
- Event
- Get
- ImageCropper
- ImageLoader
- JSON
- Layout Manager
- Logger
- Menu
- Paginator
- Profiler
- ProfilerViewer
- Resize
- Rich Text Editor
- Selector
- Slider
- Stylesheet
- TabView
- TreeView
- Uploader (experimental)
- YAHOO Global Object
- YUI Loader
- YUI Test
- Reset CSS
- Base CSS
- Fonts CSS
- Grids CSS
- YUI Articles on the YUI Website
- YUI FAQ (external)
- Graded Browser Support (external)
- Bug Reports/Feature Requests (external)
- Serving YUI Files from Yahoo! (external)
- Security Best Practices (external)
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