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CHAPTER 10 US IN G THE POPFLY BLOC K C REA TOR
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Figure 10-4. The RSS Block Code view
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Figure 10-5. The Block Editor code-completion functionality
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You can use the scroll bar to see all of the available objects and functions. Select the environment object from the list and press Tab. The word environment should be added to the editor. Type a period after the word environment, and another drop-down menu will appear showing the available properties and operations of the Popfly environment object (see Figure 10-6). You should remember the important getXml function, which allows you to retrieve XML data from web service, from our code in s 7, 8, and 9. Select getXml to insert it into the editor.
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Figure 10-6. Selecting the getXml operation
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After the operation has been inserted, you can gain further information about it, like the parameters that it requires, by typing the opening parenthesis (see Figure 10-7). In this case, the getXml operation is shown to have four parameters.
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Figure 10-7. Showing operation information
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Adding Your Block to Popfly
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Now that you have seen what the Block Creator has to offer in the way of editing the code for your block, let s add the block we ve been working on. In the Block Creator, create a new blank block by Selecting Create Stuff Block. Open VWD to the project that contains the Technorati block we created in 9 (see Figure 10-8).
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CHAPTER 10 US IN G THE POPFLY BLOC K C REA TOR
Figure 10-8. Showing operation information
Open the MyBlocks folder, and double-click the TechnoratiBlockDescription.xml file to open it in the editor. Select all the XML, and copy and paste it into the Block Description editor in the Block Creator. Repeat the same steps for the TechnoratiBlock.js JavaScript code, but paste the code in the Block Code editor. Now, you should have both the description XML and the JavaScript code in the Block Creator. Click the Save button at the top-left corner of the Block Creator window (see Figure 10-9).
Figure 10-9. Saving the block
Once you click the button, the Save As dialog box appears (see Figure 10-10). Enter MyTechnoratiBlock as the name project. You can also add a description for other people to see and a tag that will be used to help others search for your block. Click the Accept and Save button to save your block. Once you return to the Block Creator, you should be able to see your block under the My Blocks section of the Block window (you might have to refresh your browser); see Figure 10-11. Now that your block has been added to the Popfly environment, you are ready to use it in your mashups. If you are not in the Block Creator, you can find your block in your Projects list by selecting My Stuff Projects from the main menu. When the Projects list appears, your block will be at the top of the list (see Figure 10-12).
CH APT ER 10 USI NG T H E PO PF LY BLO C K C REAT O R
Figure 10-10. The Save As dialog box
Figure 10-11. Your block appears under My Blocks.
Figure 10-12. Your block in the Projects list
From the Projects list, you can click Project Details, Delete, or Edit to modify your project in the Block Creator. Sharing your block is easy, too: click the Share link to publish it to the Popfly community.
CHAPTER 10 US IN G THE POPFLY BLOC K C REA TOR
Using Your Block in a Mashup
To create a mashup with the Technorati block, select Create Stuff Mashup from the main menu. The mashup creator opens with the familiar blank canvas (see Figure 10-13).
Figure 10-13. The blank mashup creator page
Minimize the Tutorial window by clicking the >> button. Expand the My Blocks section of the Blocks window, and locate the MyTechnoratiBlock block. Drag and drop it onto the canvas (see Figure 10-14). Place the mouse over the block to show the block s help tip. The operation we wrote, getSearchResults, is the default and only operation displayed, with its sole parameter query and the default value of Popfly. Double-click the block to display the simple view of the operation (see Figure 10-15), which shows the information we defined in the block description. There is no drop-down menu of operations, because our block has only one. The description of the operation, also retrieved from our block definition, is displayed before the operation name. The parameters list displays the query variable, and the default value Popfly has been entered in the textbox.
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