| author | Eugene Ostroukhov <eugeneo@symbian.org> |
| Fri, 11 Jun 2010 13:33:03 -0700 | |
| changeset 372 | 1e408ee32d8a |
| parent 230 | 7848c135d915 |
| permissions | -rw-r--r-- |
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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="Using notification popups" /> |
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<meta scheme="URI" name="DC.Relation" content="WRTKit_Common_WRTKit_tasks-GUID-24870895-4449-4307-9a54-7c90f7b3905e.html" /> |
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<meta content="XHTML" name="DC.Format" /> |
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<meta content="GUID-39C7A69A-9334-45D1-92F6-8C239831A0A2" 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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Using notification popups</title> |
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</head> |
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<body id="GUID-39C7A69A-9334-45D1-92F6-8C239831A0A2"><a name="GUID-39C7A69A-9334-45D1-92F6-8C239831A0A2"><!-- --></a> |
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<h1 class="topictitle1"> |
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Using notification popups</h1> |
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<div> |
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<p> |
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Notification popup dialogs are an easy way to show information to |
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users. In the WRTKit notification popups are used using two methods |
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in the UIManager class: showNotification() and hideNotification(). |
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If a notification is already showing when another is commanded to be |
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shown then the current notification is replaced with the new one. |
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Notifications can be either auto-hiding after a specified time or |
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manually hidden by calling hideNotification(). Auto-hiding is an |
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easy way in situations where a message just needs to be shown but |
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doesn't require user acknowledgement, e.g. to let the user know that |
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new content has loaded or similar. |
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</p> |
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<div class="fignone" id="GUID-39C7A69A-9334-45D1-92F6-8C239831A0A2__GUID-05D19BA1-DC3E-40EE-B587-387039A547C2"><a name="GUID-39C7A69A-9334-45D1-92F6-8C239831A0A2__GUID-05D19BA1-DC3E-40EE-B587-387039A547C2"><!-- --></a><span class="figcap">Figure 1. |
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Wait notification with unknown progress</span> |
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<br /><img src="RSS_Reader_Main_Screenshot_3.png" /><br /> |
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</div> |
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<p> |
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The API for showNotification() takes four arguments: displayTime, |
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type, text and progress. The "displayTime" argument is an integer |
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that specifies how long the notification popup dialog should be |
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shown for before automatically hiding. The value is given in |
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milliseconds (1000ms = 1s) and negative values can be used to |
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specify that the dialog should not automatically hide. The second |
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argument "type" is used to specify a visual style for the popup. |
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There are three types of notifications: "info", "warning" and |
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"wait". Info is intended for informative messages, warning for |
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errors or other similar negative messages and finally wait is |
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intended for dialogs that are letting the user know that some |
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process (e.g. loading data from the Internet) is taking a long time. |
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The fourth argument "progress" is a decimal number that should be |
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omitted or null in all other cases except when the dialog should be |
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a progress dialog (typically notifications of type "wait"). For |
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progress dialogs the value should be between 0.0 and 1.0 to specify |
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how far along the process is (0.0 for "0% done" and 1.0 for "100% |
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done"). A negative value can be specified if the progress is |
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unknown, resulting in an animated progress bar that indicates that |
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the wait time and progress is not known. |
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</p> |
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<p> |
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The code below show various examples of how to show notification |
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popup dialogs. The examples assume that the UIManager has been |
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instantiated and that a variable called uiManager refers to that |
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instance. |
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</p> |
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<pre> |
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// show an info notification - auto-hide in 3 seconds |
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uiManager.showNotification(3000, "info", "Informative message here"); |
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// show a warning notification - no auto-hide |
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uiManager.showNotification(-1, "warning", "Warning message here"); |
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// show a progress notification - no auto-hide, 40% progress |
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uiManager.showNotification(-1, "wait", "Loading...", 0.4); |
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// show a progress notification - no auto-hide, unknown progress |
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uiManager.showNotification(-1, "wait", "Loading...", -1.0); |
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</pre> |
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<p> |
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The example below shows how to hide a notification. If no |
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notification is showing when the method is called then the |
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call is ignored. |
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</p> |
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<pre> |
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// hide the current notification (if any) |
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uiManager.hideNotification(); |
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</pre> |
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</div> |
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<div> |
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<div class="familylinks"> |
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<div class="parentlink"><strong>Parent topic:</strong> <a href="WRTKit_Common_WRTKit_tasks-GUID-24870895-4449-4307-9a54-7c90f7b3905e.html">Common WRTKit tasks</a></div> |
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Fixed 2046 - WRTKit Help. Renamed package for consistency.
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</div> |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
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113 |
</div> |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
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114 |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
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115 |
</body> |
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7848c135d915
Fixed 2046 - WRTKit Help. Renamed package for consistency.
tasneems@symbian.org
parents:
diff
changeset
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</html> |