| author | Eugene Ostroukhov <eugeneo@symbian.org> |
| Mon, 15 Mar 2010 17:56:08 -0700 | |
| changeset 268 | ef733cd772bb |
| parent 229 | 716254ccbcc0 |
| permissions | -rw-r--r-- |
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<!DOCTYPE html |
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><meta name="copyright" content="(C) Copyright 2009"/><meta name="DC.rights.owner" content="(C) Copyright 2009"/><meta name="DC.Type" content="concept"/><meta name="DC.Title" content="STEW: indicating progress"/><meta name="abstract" content="Retrieving data from the Internet might take some time. Provide users with visual feedback on how the operation is progressing. STEW displays a progress indicator during data retrieval from Twitter."/><meta name="description" content="Retrieving data from the Internet might take some time. Provide users with visual feedback on how the operation is progressing. STEW displays a progress indicator during data retrieval from Twitter."/><meta name="DC.Relation" scheme="URI" content="GUID-A3C4CDE4-4231-463D-B6A8-4969B91BDA0C"/><meta name="DC.Relation" scheme="URI" content="GUID-775005BC-2FF8-45A9-BBA6-6CED6B5780A2"/><meta name="DC.Relation" scheme="URI" content="GUID-1FD5C597-43B8-402E-92B8-FE0787DB4F3B"/><meta name="DC.Format" content="XHTML"/><meta name="DC.Identifier" content="GUID-9405C97E-4784-4043-BA75-77518EF0A38F"/><meta name="DC.Language" content="en"/><title>STEW: indicating progress </title><script type="text/javascript"> |
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function initPage() {}
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</script><link href="../PRODUCT_PLUGIN/book.css" rel="stylesheet" type="text/css"/><link href="css/s60/style.css" rel="stylesheet" type="text/css" media="all"/></head><body onload="initPage();"><div class="body"><div class="contentLeft prTxt"><h1 class="pageHeading" id="GUID-9405C97E-4784-4043-BA75-77518EF0A38F">STEW: indicating progress</h1><div><p>Retrieving data from the Internet might take some time. Provide users with visual feedback on how the operation is progressing. STEW displays a progress indicator during data retrieval from Twitter.</p> |
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<p>The progress indicator is implemented in the <code>main.html</code> file.</p> |
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<pre class="codeblock"><!-- LOADER --> |
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<div id="loader_popup" class="popup hidden"> |
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<table class="popup_window"> |
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<tr><td> </td></tr> |
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<tr class="background"> |
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<td class="loader"> |
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<div class="title">LOADING</div> |
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<img src="images/loader.gif" alt="Loader"> |
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<div class="subtitle">Please wait while we process data...</div> |
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</td> |
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</tr> |
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<tr><td> </td></tr> |
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</table> |
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</div></pre> |
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<p>The layout of the loader pop up screen is defined in the CSS files.</p> |
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<div class="figure" id="GUID-CC8EACB4-45C4-4C32-889F-F468F235899B"><img src="GUID-1D48EF4F-BD40-42D9-9E5A-3B88B948ECE0_d0e12296_href.png"/><p class="figure-title"><strong>Figure: </strong>STEW progress indicator</p></div> |
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<p>To display the screen when a request is made to the Twitter service and to hide it when a response is received, add the following function to <code>TwitterService.js</code>:</p> |
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<pre class="codeblock">TwitterService.prototype.showProgress = function( show ) {
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if (this.progressId) {
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if (show == null) |
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show = true; |
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Helper.show( this.progressId, show ); |
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if (!show) {
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// If we hide the progress bar, set to null here so we |
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// don't do that twice and overwrite some other manager's |
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// progress bar. |
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this.progressId = null; |
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} |
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} |
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} |
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</pre> |
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<p>Update the functions that get triggered when a request is issued and when a response has been processed, as listed in the code snippet below:</p> |
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<pre class="codeblock">TwitterService.prototype._doRequest = function( url, type ) {
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this.showProgress(); |
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... |
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} |
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TwitterService.prototype.handleSuccessResponse = function( arg ) {
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this.showProgress( false ); |
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... |
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} |
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TwitterService.prototype.handleErrorResponse = function( status ) {
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this.showProgress( false ); |
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... |
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} |
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</pre> |
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</div></div></div><div class="footer"><hr/><div class="copy">© Nokia 2009.</div></div></body></html> |