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One final note about the fetch() command: it lets you not only pull just the parts of a message that you need at any given moment, but also truncate them in case they are quite long and you just want to provide an excerpt from the beginning to tantalize the user! To use this feature, follow any part name with a slice in angle brackets that indicates what range of characters you want it works very much like Python s slice operation: BODY[]<0100> That would return the first 100 bytes of the message body This can let you inspect both text and the beginning of an attachment to learn more about its content before letting the user decide whether to select or download it..

Now that we ve connected the RSS and News Reader blocks and set their operations and inputs, we are ready to test the mashup. Click the wrench icon to go back to the mashup design space, and click the Preview menu item at the top of the design surface. The design surface and Blocks windows slide away. A notice, framed in yellow, may appear stating Retrieving data from http://blogs.msdn.com/eric_griffin/rss.xml . . . before the mashup appears (see Figure 3-10).

Following the code from the top down, it starts with the creation of the layout and the widgets The widgets are then placed in the layout before the buttons are configured Both Next and Previous are disabled from the start because there is nothing to go back to, and the user has to approve of the rules before it is possible to continue These buttons are connected to the doNext() and doPrev() slots, while the Cancel button is connected to the reject() slot that closes the dialog When the buttons are connected, the pages are created and added to the widget stack The final step is to connect the toggled(bool) signal of the checkbox from the first page to the setEnabled(bool) slot of the Next button..

You might have noticed, while trying out Listing 15 7 or reading its example output just shown, that IMAP marks messages with attributes called flags, which typically take the form of a backslashprefixed word, like \Seen for one of the messages just cited. Several of these are standard, and are defined in RFC 3501 for use on all IMAP servers. Here is what the most important ones mean: \Answered: The user has replied to the message. \Draft: The user has not finished composing the message.

Some of the image collection s responsibilities include managing the list of tags and keeping track of which tag belongs to which image. Let s start by having a look at the getTags method. Its role is to return a list of all available tags. The method s source code can be seen in Listing 13-18. Because you use the default connection, you create a query, prepare it, and execute it. The query itself contains a DISTINCT clause since the same tag can occur several times for different images. This ensures that you do not get a list with duplicates. When the query has been executed, the results are put in a QStringList that is returned. Listing 13-18. Querying for a list of tags, packaging them in a QStringList, and returning QStringList ImageCollection::getTags() { QSqlQuery qry;

\Flagged: The message has somehow been singled out specially; the purpose and meaning of this flag vary between mail readers. \Recent: No IMAP client has seen this message before. This flag is unique, in that the flag cannot be added or removed by normal commands; it is automatically removed after the mailbox is selected. \Seen: The message has been read.

qry.prepare( "SELECT DISTINCT tag FROM tags" ); if( !qry.exec() ) qFatal( "Failed to get tags" ); QStringList result; while( qry.next() ) result << qry.value(0).toString(); return result; } The other tag management method, the addTag method (see Listing 13-19), adds a tag to a given image. Which image the tag belongs to is specified using an id value. The method does not check for duplicates because the getTags method filters them away, so it is possible to add the same tag several times to the same image. Listing 13-19. Adding a new tag to an image void ImageCollection::addTag( int id, QString tag ) { QSqlQuery qry; qry.prepare( "INSERT INTO tags (id, tag) VALUES (:id, :tag)" ); qry.bindValue( ":id", id ); qry.bindValue( ":tag", tag ); if( !qry.exec() ) qFatal( "Failed to add tag" ); }

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