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private slots: void addItem(); void editItem(); void deleteItem(); private: Ui::ListDialog ui; }; #endif // LISTDIALOG_H The ui object consists of a set of pointers to all widgets and layouts that make up the dialog. It also contains two functions: setupUi (for populating a QDialog with the widgets and layouts), and retranslateUi (for internationalizing applications covered in more detail in 10). The implementation of the ListDialog constructor shows how the ui object is used (see Listing 2-3). First, setupUi is called to create the UI of the dialog. When calling the setupUi, the connections made in Designer are set up. The rest of the connections are done manually by calling connect. In the calls, the ui object is used to access the widgets in the dialog. No connections really have to be made manually. By implementing a slot named on_addButton_clicked(), the setupUi call automatically connects the clicked signal from the addButton to that slot. This works for all slots named using the scheme on_widget name_signal name( signal arguments ). Even as this is possible, I recommend not using it because it does not encourage providing clear names for slots that reflect what they do. Also, when connecting several signals result in the same action, this approach fails. You end up having several slots calling the same function or even worse containing the same code. Making all connections in the constructor of the dialog classes ensures that the code will be easy to follow and read you just created a table of how the user interface is connected to the slots performing the actual work. Listing 2-3. Constructor of the ListDialog class ListDialog::ListDialog() : QDialog() { ui.setupUi( this ); connect( ui.addButton, SIGNAL(clicked()), this, SLOT(addItem()) ); connect( ui.editButton, SIGNAL(clicked()), this, SLOT(editItem()) ); connect( ui.deleteButton, SIGNAL(clicked()), this, SLOT(deleteItem()) ); }

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At this point, the middleware is correctly configured, but the database tables AuthKit requires don t exist yet. You ll need to change SimpleSite s websetup.py file so that these tables are created at the same time as any other tables used by your model.

All pages rendered by a web application must have an appropriate charset explicitly specified, which can be done using one of two mechanisms: Via the charset parameter of the HTTP Content-Type header for example Content-Type: text/html; charset=UTF-8 Via a corresponding <meta http-equiv> tag: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> When using this solution, it is important to ensure that the <meta> tag appears in the document before any tag that could contain untrusted data for example, a <title> tag. It is important to specify an appropriate charset that reflects the encoding assumptions made by the application when sanitizing/filtering inputs and HTML-encoding strings for output.

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shown here. The method used here is called the single inheritance approach. In the Designer user manual, two alternate methods are described: the multiple inheritance method (inheriting both QDialog and Ui classes) and the direct method (creating a QDialog and a Ui from the method using the dialog). I prefer using the single inheritance approach and will use it throughout this book. It keeps the generated code separated from the manually written source code through the ui object something that helps making changes more controllable. Feel free to consult the Designer user manual and try the alternatives if you want to.

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First add the following import to the top of the websetup.py file: from authkit.users.sqlalchemy_driver import UsersFromDatabase Then after these lines: # Load the models from simplesite.model import meta meta.metadata.bind = meta.engine add these lines to add the AuthKit classes and mappers to the model: log.info("Adding the AuthKit model...") users = UsersFromDatabase(model) Next you ll need to add some users and roles to the application. After these lines: # Create the tables if they aren't there already meta.metadata.create_all(checkfirst=True) add these: log.info("Adding roles and uses...") users.role_create("delete") users.user_create("foo", password="bar") users.user_create("admin", password="opensesame") users.user_add_role("admin", role="delete") While you are updating the websetup.py file, it also makes sense to add a default set of tags so that users can begin tagging pages. Although it doesn t have anything to do with AuthKit, add these Pylons-related tags by adding these lines after the ones earlier: log.info("Adding tags...") tag1 = model.Tag() tag1.name = u'Pylons' meta.Session.add(tag1) tag2 = model.Tag() tag2.name = u'Paste' meta.Session.add(tag2) tag3 = model.Tag() tag3.name = u'Tutorial' meta.Session.add(tag3) tag4 = model.Tag() tag4.name = u'Database' meta.Session.add(tag4) tag5 = model.Tag() tag5.name = u'Recipe' meta.Session.add(tag5) With the changes in place, you will need to drop the database you ve been using so far or change the config file to use a new database so that you can set up the new AuthKit tables. Re-create the database with this command:

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