org.symbian.tools.wrttools.doc.WRTKit/html/WRTKit_Feed_updates-GUID-25cd0e54-0516-4469-965e-c5781cf44dc9.html
author Eugene Ostroukhov <eugeneo@symbian.org>
Tue, 30 Mar 2010 15:20:42 -0700
changeset 292 d1d1c556b0d1
parent 230 7848c135d915
permissions -rw-r--r--
Bug 2431 - Import gives incorrect warning
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<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en" xml:lang="en">
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<head>
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<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
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<meta name="copyright" content="(C) Copyright 2005" />
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<meta name="DC.rights.owner" content="(C) Copyright 2005" />
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<meta content="concept" name="DC.Type" />
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<meta name="DC.Title" content="Feed updates" />
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<meta scheme="URI" name="DC.Relation" content="WRTKit_RSS_Reader_Tutorial-GUID-678d197f-c7b0-4e5e-85e2-f8549c75bbe8.html" />
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<meta content="XHTML" name="DC.Format" />
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<meta content="GUID-25CD0E54-0516-4469-965E-C5781CF44DC9" name="DC.Identifier" />
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<meta content="en" name="DC.Language" />
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<link href="commonltr.css" type="text/css" rel="stylesheet" />
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<title>
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Feed updates</title>
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</head>
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<body id="GUID-25CD0E54-0516-4469-965E-C5781CF44DC9"><a name="GUID-25CD0E54-0516-4469-965E-C5781CF44DC9"><!-- --></a>
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    <h1 class="topictitle1">
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Feed updates</h1>
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    <div>
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        <div class="section"><h2 class="sectiontitle">
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Fetching news items</h2>
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            <p>
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                Before we can show any news items we have to fetch them. So let's take
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                a break in implementing the user interface and write the code that fetches
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                the news items. The majority of that code is in the FeedUpdateBroker.js file
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                in a JavaScript class called FeedUpdateBroker. We'll only be using one single
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                method from that class: fetchFeed(). But how do we hook that up to our widget?
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            </p>
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            <p>
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                The actual call to fetchFeed() will be done from the timer function updateFeedTimerFunc()
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                that runs once a second. There we'll need an if-clause that checks if it's time
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                to update the feeds, if another update is already going on, if we have a valid URL
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                that we can fetch and if we're in the main view. If all of these tests tell us
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                that it's time to update the feed, we'll check if the feed update was manually
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                commanded or automatically triggered because it was time to update the feed in
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                the background. If this is a manual update then we'll popup a progress notification 
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                dialog. Next we'll create a new instance of the FeedUpdateBroker class and call
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                the fetchFeed() method to start the AJAX-based RSS feed update. We need to pass
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                two arguments to this method: the feed URL that we have in the feedURL variable
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                and a callback function that should be called when the update is completed.
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            </p>
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            <p>
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                We don't have that function yet so that's the first thing we need to implement.
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                We'll leave it empty for now but return to it in a bit:
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            </p>
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<pre>
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// Callback function that gets called when a feed update has completed.
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function feedUpdateCompleted(event) {
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}
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</pre>
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            <p>
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                After we call the fetchFeed() function we'll schedule the next feed update. In
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                theory we shouldn't do this until the feed update completes since there is a risk
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                that we do two updates at the same time. But because we're adding a check to
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                only do feed updates if another update isn't on-going this risk isn't actually
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                real. Now that we have a plan for how to update the feed, let's write the code.
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                First we need to declare a variable for the feed update broker instance that
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                we'll create:
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            </p>
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<pre>
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// Feed update broker.
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var feedUpdateBroker = null;
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</pre>
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            <p>
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                Then the actual implementation for the updateFeedTimerFunc() timer function:
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            </p>
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<pre>
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// Timer function for feed updates - called once every second.
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function updateFeedTimerFunc() {
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    var now = new Date().getTime();
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    // check if a feed update has been scheduled, if it's time to update now,
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    // and if there's no update currently in progress and if we're in the main view
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    if ((feedURL != null) &amp;&amp;
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                (feedUpdateTime != -1) &amp;&amp;
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                (now &gt; feedUpdateTime) &amp;&amp;
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                (feedUpdateBroker == null) &amp;&amp; 
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                (uiManager.getView() == mainView)) {
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        // show progress dialog if this is a commanded feed update
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        if (feedUpdateCommanded) {
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            // no auto hiding, wait-type notification, unknown progress
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            uiManager.showNotification(-1, "wait", "Loading feed...", -1);
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        }
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        // fetch the feed from the specified URL
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        feedUpdateBroker = new FeedUpdateBroker();
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        feedUpdateBroker.fetchFeed(feedURL, feedUpdateCompleted);
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        if (feedUpdateFrequency != -1) {
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            // schedule next update
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            feedUpdateTime = now + feedUpdateFrequency;
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        } else {
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            // feed update frequency is "never"
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            feedUpdateTime = -1;
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        }
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    }
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}
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</pre>
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            <p>
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                The progress dialog is created so that it has a display time of -1 so that
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                it doesn't automatically hide but rather has to be commanded to go away. The
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                notification dialog type is "wait" and we'll give a progress of -1 since we
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                don't know how far along in the feed updating process we are. A negative 
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                progress value like -1 means "unknown progress" and will result in an animated
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                progress indicator that shows that something is going on but the exact time
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                that it will take is unknown.
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            </p>
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            <p>
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                Our feed updating should now be working and whenever a feed update is completed
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                there should be a call to the empty feedUpdateCompleted() function. Let's 
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                continue the implementation there.
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            </p>
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            <p>
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                When the feedUpdateCompleted() function is called it receives an event object
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                from the FeedUpdateBroker. This object contains a status that is either "ok"
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                or "error", a "lastModifiedTime" string that contains the time when the RSS
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                feed was last modified to help us decide if there are any new news items to
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                display, as well as an array of news item objects in a property called "items".
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                If the status is "error" then we'll show an error notification dialog. Keep in
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                mind that there might or might not be a progress dialog already showing at this
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                time. Either way we can just call the showNotification() function in the user
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                interface manager because if another dialog is already visible then it will simply
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                replace it with the one that we asked it to show. If the status is "ok" then we'll
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                call hideNotification() in the user interface manager. This will hide the progress
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                dialog if it's showing and if the dialog wasn't showing then the call will just
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                be ignored.
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            </p>
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            <p>
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                We'll then need to compare the lastModifiedTime against the last news feed that
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                we have. That means we'll need to track the lastModifiedTime of whatever news
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                feed that we are showing, and that means we need a new global variable:
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            </p>
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<pre>
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// Time when the feed was last modified.
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var feedLastModified = null;
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</pre>
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            <p>
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                If the lastModifiedTime is different from the one that we are storing in the
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                feedLastModified variable then we know that there's new news items to show.
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                If this is the case then we'll update the feedLastModified time and set the news
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                items to the main view. We could do something fancy and only update the news items
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                that have been modified but to keep the tutorial simple we'll just simply remove
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                all the current items and replace them with the new items and then focus the first
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                of the items. But before we move on to that we'll write as much as we can of the
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                feedUpdateCompleted() function:
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            </p>
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<pre>
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// Callback function that gets called when a feed update has completed.
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function feedUpdateCompleted(event) {
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    if (event.status == "ok") {
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        // if there aren't any feed items yet, we'll hide the progress dialog
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        if (feedUpdateCommanded) {
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            uiManager.hideNotification();
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        }
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        // check if the feed has updated
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        if (event.lastModified != feedLastModified) {
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            // remember the last modified timestamp
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            feedLastModified = event.lastModified;
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            // update news item controls here
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        }
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    } else {
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        // show error message
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        uiManager.showNotification(3000, "warning", "Error while updating feed!&lt;br/&gt;(check network settings)");
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    }
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    // null the broker reference to indicate that there's no current
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    // update in progress
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    feedUpdateBroker = null;
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    // reset commanded feed update flag
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    feedUpdateCommanded = false;
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}
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</pre>
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            <p>
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                We wrote a comment "update news item controls here" at the spot where we will
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                actually create and add news feed items to the main view. We'll replace that in
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                a bit with the actual code to do the job, but first we need to write some code
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                that we'll need to do that.
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            </p>
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        </div>
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        <div class="section"><h2 class="sectiontitle">
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Showing news items</h2>
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            <p>
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                The news feed items will be shown using ContentPanel controls. We'll need a way
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                to keep track of the ones we're showing so that we can easily remove them when
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                there is new news items to show. Let's create an array to track them:
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            </p>
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<pre>
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// Reference to current feed items controls.
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var feedItemControls = [];
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</pre>
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            <p>
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                Now we can implement a function that will remove all controls that are tracked
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                by this array from the main view. We'll use this as the first step when we want
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                to display news items.
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            </p>
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<pre>
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// Removes feed items.
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function removeFeedItems() {
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    // remove all current feed items from the main view
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    for (var i = 0; i &lt; feedItemControls.length; i++) {
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        mainView.removeControl(feedItemControls[i]);
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    }
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    // reset feed item control array
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    feedItemControls = [];
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}
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</pre>
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            <p>
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                The function simply loops through the array and calls the removeControl() method
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                in the main view to remove each of the feed item controls from the view, one at a time.
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                Finally we'll reset the feedItemControls array so that it reflects the fact that
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                there are no more controls in the main view.
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            </p>
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            <p>
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                What about adding news items? We'll do that in a function that we'll call from the
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                feedUpdateCompleted() function. Let's call the function setFeedItems(). The function
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                will start by calling the removeFeedItems() function we just created to empty the 
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                main view from news items before we start adding new ones to it. After this we'll
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                loop through the news feed items that were handed to us from the FeedUpdateBroker.
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                For each one we need a ContentPanel control. We'll be recycling the controls instead
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                of constantly creating new ones over and over again as new news items come in. To
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                this end we'll need a way to track ContentPanel controls that we have already
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                created. We'll do this by creating an array called feedItemControlPool, which will
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                be a global variable:
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            </p>
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<pre>
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// Feed item control pool.
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var feedItemControlPool = [];
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</pre>
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            <p>
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                If we have enough controls in the pool we'll just take them from there. Otherwise
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                we'll create a new ContentPanel and add it to the pool. Either way we'll end up with
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                a ContentPanel control that is ready to be used. We'll need to reset its state since we
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                recycled it, so we make sure it's collapsed rather than expanded, we'll set its caption
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                to the title of the news item and we'll generate some HTML from the news item summary
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   297
                that we'll set as the content for the ContentPanel. And then finally we'll add the
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                ContentPanel to the main view.
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            </p>
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            <p>
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                Lets create the code but skip the HTML for the news item summary for now:
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            </p>
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<pre>
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// Sets feed items.
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function setFeedItems(items) {
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    // start by removing all current feed items
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    removeFeedItems();
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   312
    
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    // create new feed items and add them to the main view
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   314
    // use feed item pool to recycle controls
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   315
    for (var i = 0; i &lt; items.length; i++) {
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   316
        // get a feed item control from the pool or create one and
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   317
        // place it in the pool if there aren't enough feed item controls
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   318
        var feedItemControl;
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   319
        if (i == feedItemControlPool.length) {
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   320
            feedItemControl = new ContentPanel(null, null, null, true);
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   321
            feedItemControlPool.push(feedItemControl);
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   322
        } else {
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   323
            feedItemControl = feedItemControlPool[i];
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   324
        }
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   325
        
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   326
        // initialize feed item control
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   327
        var item = items[i];
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   328
        feedItemControl.setCaption(item.title);
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   329
        feedItemControl.setContent("placeholder");
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   330
        feedItemControl.setExpanded(false);
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   331
        
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        // add the feed item control to the main view
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   333
        feedItemControls.push(feedItemControl);
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   334
        mainView.addControl(feedItemControl);
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   335
    }
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   336
}
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   337
</pre>
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   338
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   339
            <p>
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   340
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   341
                The items argument contains the array of news items that we received in the event
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   342
                object argument to the feedUpdateCompleted() callback function. The items are in
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   343
                the "items" property of the event object. Note how the feedItemControl is either
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   344
                created or taken from the feedItemControlPool. If it's created it is given four
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   345
                arguments: a null unique identifier because we don't need one, a null caption and
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diff changeset
   346
                a null content because we will set both every time before we show it, and finally
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diff changeset
   347
                a value of true to the "foldable" argument in the ContentPanel constructor. This
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   348
                flag determines whether the ContentPanel can be folded (expanded and collapsed) or
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   349
                not. We want a foldable one so we pass true to this argument.
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   350
            </p>
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   351
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   352
            <p>
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   353
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   354
                Once we have the ContentPanel (either from the pool or newly created) we set its
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diff changeset
   355
                state: caption, content and expanded state. Note that for now we'll just set a
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diff changeset
   356
                placeholder string as the content. Also note that we set the expanded state to false
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diff changeset
   357
                to collapse the news items by default. Finally we add the content panels to the main
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diff changeset
   358
                view and to the feedItemControls array that tracks all the ContentPanels that we use
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diff changeset
   359
                for the news items.
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   360
            </p>
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   361
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   362
            <p>
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   363
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diff changeset
   364
                Now that we have written the code to create and add news items to the main view
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diff changeset
   365
                we have to hook that up to the feedUpdateCompleted() function. Remember we added
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diff changeset
   366
                a comment in the spot where we should return to do this? Let's replace that comment
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diff changeset
   367
                with the following:
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diff changeset
   368
            </p>
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diff changeset
   369
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   370
<pre>
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   371
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   372
// set feed items to the main view
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diff changeset
   373
setFeedItems(event.items);
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diff changeset
   374
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   375
// focus the first feed item control
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   376
// (but only if we are in the main view)
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diff changeset
   377
if (uiManager.getView() == mainView &amp;&amp; feedItemControls.length &gt; 0) {
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diff changeset
   378
    feedItemControls[0].setFocused(true);
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diff changeset
   379
}
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   380
</pre>
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   381
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   382
            <p>
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diff changeset
   383
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diff changeset
   384
                We just call the setFeedItems() function we just wrote, passing it the feed items
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diff changeset
   385
                that the FeedUpdateBroker fetched and parsed for us, and then if we're in the main
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   386
                view we'll focus the first of the news feed item controls.
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diff changeset
   387
            </p>
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diff changeset
   388
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diff changeset
   389
            <p>
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diff changeset
   390
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   391
                Now that we have all the code needed to fetch and update news feed items we'll go
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   392
                back and add some more functionality to a function we wrote a little bit earlier:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   393
                the saveSettingsClicked() function.
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diff changeset
   394
            </p>
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diff changeset
   395
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   396
            <p>
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diff changeset
   397
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   398
                The functionality that we're adding will handle updates of the feed items in the
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   399
                main view after the user has modified the settings. We didn't write this earlier
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   400
                because we didn't have all the necessary support code in place but we can add it now.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   401
                First we add some code to the end of the saveSettingsClicked() function to force an
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   402
                update of the news items after the users saves the settings:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   403
            </p>
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diff changeset
   404
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   405
<pre>
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diff changeset
   406
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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   407
// update the feed
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   408
feedLastModified = null;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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diff changeset
   409
updateFeed();
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diff changeset
   410
</pre>
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diff changeset
   411
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diff changeset
   412
            <p>
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diff changeset
   413
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
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parents:
diff changeset
   414
                We update the feed by setting the feedLastModified variable to null to force an update
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diff changeset
   415
                and then calling updateFeed(). This causes an immediate feed update and we also get the
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   416
                progress notification dialog, which is what we want because this was a manual
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   417
                update that was caused by the user clicking "save".
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   418
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   419
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   420
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   421
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   422
                Let's also add some code that checks if a new feed was selected and removes all the
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   423
                news items from the main view if the user selected a new feed. To do this we'll first
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   424
                copy the old feedURL to a variable that we'll call oldFeedURL at the very beginning
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   425
                of the function:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   426
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   427
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   428
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   429
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   430
// remember the old feed URL
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   431
var oldFeedURL = feedURL;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   432
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   433
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   434
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   435
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   436
                Then we'll add the following just before we show the main view:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   437
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   438
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   439
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   440
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   441
// remove all feed items if the user selected a new feed
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   442
if (feedURL != oldFeedURL) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   443
    removeFeedItems();
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   444
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   445
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   446
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   447
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   448
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   449
                We can now test this in a PC browser, handset or emulator. Everything should work
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   450
                except that there's still nothing but a placeholder for the actual content in each
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   451
                ContentPanel. You can still expand and collapse the ContentPanels and the settings
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   452
                and automatic and manual updates are working. We're almost done but we still need
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   453
                to implement the code that will actually show news item summaries in the content
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   454
                panels.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   455
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   456
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   457
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   458
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   459
                Remember we said that we would implement news items so that there's a link from
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   460
                each news item to the website where the full article is. When you open links
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   461
                to external websites in the S60 Web Runtime you should use the widget.openURL()
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   462
                function. But PC browsers don't have that function so we'll need to create a wrapper
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   463
                function that either calls widget.openURL() if we're in the Web Runtime or just
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   464
                opens a new window if we're in a PC browser.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   465
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   466
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   467
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   468
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   469
// Opens a URL.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   470
function openURL(url) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   471
    if (window.widget) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   472
        // in WRT
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   473
        widget.openURL(url);
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   474
    } else {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   475
        // outside WRT
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   476
        window.open(url, "NewWindow");
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   477
    }
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   478
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   479
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   480
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   481
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   482
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   483
                Content in a ContentPanel control is a fragment of HTML. In other words it's a
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   484
                piece of HTML that will be inserted into the control using code. That means that
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   485
                in order to display the news item we will have to generate some HTML for it.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   486
                We need a function that will take a news item object and return some HTML that
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   487
                we can give to thet setContent() method in the ContentPanel control. Let's write
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   488
                that function:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   489
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   490
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   491
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   492
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   493
// Returns the content HTML for a feed item.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   494
function getContentHTMLForFeedItem(item) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   495
    var buf = "";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   496
    
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   497
    // item date
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   498
    if (item.date != null) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   499
        buf += "&lt;div class=\"FeedItemDate\"&gt;" + item.date + "&lt;/div&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   500
    }
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   501
    
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   502
    // item description
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   503
    if (item.description != null) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   504
        buf += "&lt;div class=\"FeedItemDescription\"&gt;" + item.description + "&lt;/div&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   505
    }
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   506
    
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   507
    // item URL
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   508
    if (item.url != null) {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   509
        buf += "&lt;div class=\"FeedItemLink\"&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   510
            buf += "&lt;a href=\"JavaScript:openURL('" + item.url + "');\"&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   511
            buf += "Read more...";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   512
            buf += "&lt;/a&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   513
        buf += "&lt;/div&gt;";
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   514
    }
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   515
    
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   516
    return buf;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   517
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   518
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   519
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   520
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   521
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   522
                The function uses the properties in the news item object that the FeedUpdateBroker
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   523
                created for us. There's a date property that has the publish date of the news item.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   524
                There's a description that contains the actual summary, and there's a URL that points
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   525
                to the website where the full article is. Note that we're using the openURL() wrapper
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   526
                function that we just wrote for the link to the full article.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   527
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   528
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   529
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   530
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   531
                Our HTML is very simple: three div-tags that have the date, description and a link as
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   532
                their content. And ech of them has a CSS class so that we can match them with some
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   533
                style rules. Since we have three different pieces of data we need three CSS rules:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   534
                FeedItemDate for the date, FeedItemDescription for the news item summary and finally
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   535
                FeedItemLink for the link to the website. Let's create these in the RSSReader.css
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   536
                stylesheet file:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   537
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   538
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   539
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   540
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   541
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   542
/* Feed item date */
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   543
.FeedItemDate {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   544
    font-style: italic;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   545
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   546
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   547
/* Feed item text */
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   548
.FeedItemDescription {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   549
    padding: 4px 0px;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   550
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   551
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   552
/* Feed item links */
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   553
.FeedItemLink {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   554
    
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   555
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   556
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   557
/* Anchor tags in the context of a feed item link */
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   558
.FeedItemLink a {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   559
    text-decoration: underline;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   560
    font-weight: bold;
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   561
    color: rgb(0,0,255);
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   562
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   563
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   564
/* Focused anchor tags */
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   565
.FeedItemLink a:focus {
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   566
    background: rgb(0,0,255);
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   567
    color: rgb(255,255,255);
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   568
}
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   569
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   570
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   571
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   572
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   573
                The rule for links can be left empty because we will just use default ContentPanel
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   574
                content styling. However we'll change the way the link looks in the context of that
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   575
                FeedItemLink div. We'll make links blue, bold and underlined in their normal state
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   576
                and inverse with a blue background and white text color when focused.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   577
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   578
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   579
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   580
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   581
                Now that we have a function that generates HTML for the ContentPanel we can remove
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   582
                the placeholder content replace it with a call to our function:
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   583
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   584
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   585
<pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   586
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   587
feedItemControl.setContent(getContentHTMLForFeedItem(item));
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   588
</pre>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   589
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   590
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   591
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   592
                We're done! Now you can try the widget in a PC browser and then on the handset
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   593
                or emulator.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   594
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   595
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   596
            <div class="fignone" id="GUID-25CD0E54-0516-4469-965E-C5781CF44DC9__GUID-F7A5DBAA-7F9F-4C48-A25A-0DACE463CBF4"><a name="GUID-25CD0E54-0516-4469-965E-C5781CF44DC9__GUID-F7A5DBAA-7F9F-4C48-A25A-0DACE463CBF4"><!-- --></a><span class="figcap">Figure 1. 
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   597
RSS Reader main view</span>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   598
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   599
                
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   600
                <br /><img src="RSS_Reader_Main_Screenshot_1.png" /><br />
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   601
            </div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   602
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   603
        </div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   604
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   605
        <div class="section"><h2 class="sectiontitle">
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   606
What we have learned</h2>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   607
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   608
            
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   609
            <p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   610
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   611
                The RSS Reader tutorial has taught us several things. We have learned to create a widget
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   612
                that has more than just one view. We have learned how to use several new WRTKit controls.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   613
                We used the SelectionList, SelectionMenu and FormButton controls in our settings view, 
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   614
                and in the main view we used the ContentPanel control that allowed us to add our own
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   615
                content as a seamless part of the rest of the user interface using HTML fragments that
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   616
                we styled with CSS rules. We have learned to modify a view while the widget runs by adding
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   617
                and removing controls. And we have learned how to separate our widget code so that the
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   618
                user interface code doesn't contain any logic code and so that the logic code doesn't
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   619
                contain any user interface code.
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   620
            </p>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   621
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   622
        </div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   623
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   624
    </div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   625
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   626
<div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   627
<div class="familylinks">
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   628
<div class="parentlink"><strong>Parent topic:</strong> <a href="WRTKit_RSS_Reader_Tutorial-GUID-678d197f-c7b0-4e5e-85e2-f8549c75bbe8.html">RSS Reader</a></div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   629
</div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   630
</div>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   631
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   632
</body>
7848c135d915 Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff changeset
   633
</html>