vb.net barcode printing 9: Search and Retrieve Core Data with Criteria in Java

Drawing Data Matrix ECC200 in Java 9: Search and Retrieve Core Data with Criteria

CHAPTER 9: Search and Retrieve Core Data with Criteria
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Now do the same set of things for the Quote entity, dragging it to the window as well. When it comes time to select properties to include, turn off show, leaving character and quoteText enabled. Everything else should be done just the same. After the GUI has been created, drag the new box down a bit so you can see both sets of views. Figure 93 shows what the window should look like now.
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Figure 9-3. This chapter s assisted GUI creation
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Smoothing Out the Rough Spots
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Now we re going to rearrange things a bit so that our window looks a little more orderly, and configure the array controllers so that the display of quotes is dependent on the selected show. Start by dragging the NSBox labeled Quote from the other window into position below the Show box, using the blue guidelines to help align the two. Then, select the window by clicking its title bar, and make it just the right size to show its content by selecting Layout Size To Fit from the menu, ending up with the much more compact result shown in Figure 9-4.
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CHAPTER 9: Search and Retrieve Core Data with Criteria
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Figure 9-4. The data entry window for QuoteMonger
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Complete the window configuration by opening the Attributes Inspector and setting the window s title to Data Entry. Now, let s configure the array controllers a bit. Like before, our friendly assistant has given them some unwieldy names, Show Array Controller and Quote Array Controller. Edit each of those in the main nib window, changing them to Shows and Quotes, respectively. Now, select the Quotes controller, and open the Bindings Inspector. By default, each array controller will fetch all objects for the corresponding entity. We re going to change this one to only fetch quotes based on the selected Show. Open the Content Set binding, select Shows in the popup list, selection in the Controller Key combo box, and type in quotes in the Model Key Path combo box. Finally press Return to turn on the binding.
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Enter Some Initial Quotes
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Save your changes, switch back to Xcode, and click Build & Run. The app should start up and show you the Data Entry window. Select the Add button below the upper table view to add a show, and double-click in the highlighted space in the table view to edit the show s name. Do this a few times to create a few Show instances. Now, with one of the shows selected, add a quote in the lower table, editing the text and the names of any characters right into the table. If you add a quote that contains an exchange between two or more characters, enter the names of all involved characters in the Character field. When we later enable search based on character names, it will work with all the names you entered. Add a few more quotes, spread across a few different shows. You ll see
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CHAPTER 9: Search and Retrieve Core Data with Criteria
that the list of quotes changes when you select a different show, and if you quit and restart QuoteMonger, you should see that everything you entered has been saved.
Creating the Quote Finder Window
Now it s time to lay the foundation for the search window. Once again, we ll use our friendly assistant to start things out, but from then on we ll be making lots of changes. Back in Interface Builder, find the window that was left empty after its contents were moved to the other window and bring it to the front. Then go back to Xcode again, and -drag the Quote entity back to the empty window in Interface Builder. Select Master/Detail View (just like we always do), but this time leave all the checkboxes turned off, and just click Next. In the list of properties to include, turn off show, leaving just character and quoteText, then click Finish. As ever, the generated view includes a # out of # text field, which in this case we don t want, so you should select and delete it. If you re running Leopard and can t see the text field (because it s hiding behind the table view), then select the table view, select Layout Send To Back from the menu, then select and delete the text field. We don t want to include the NSBox in our layout, so select the box, and then select Layout Unembed Objects from the menu. Set the window s title to Quote Finder, and rename the new array controller in your main nib window, probably called Quote Array Controller, to FoundQuotes. A few adjustments need to be made to the table view. First of all, we don t want any of the retrieved values to be editable here. This window is for search and display only. So bring up the Attributes Inspector, then select each of the table columns and click to disable the Editable button in the Inspector. We also want to display the show that each found quote belongs to, so add a column to the table view by duplicating one of the existing ones. Set the new column s title (in the Attributes Inspector) to Show, and configure its Value binding (in the Bindings Inspector) to use the FoundQuotes controller, with arrangedObjects as the Controller Key and show.name as the Model Key Path. Make the table view a bit wider, and resize one or more of the columns so that they all fit. Now make the window a bit taller, drag out an NSTextView from the Library, line it up beneath the table view, and resize it to match (see Figure 9-5). This text view will show the full quote of the selected item. Click to select the NSTextView (not the NSScrollView that contains it), turn off the Editable and Rich Text checkboxes in the Attributes Inspector, then switch back to the Bindings Inspector and configure the text view s Value binding with FoundQuotes, selection, and quoteText.
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