Generated MetaControl Objects
As you build out more and more database-driven QForms
, you'll notice
that you still may spend quite a bit of wasted time coding the same type of Control
definition, setup and data binding procedures over and over again. This becomes
especially tedious when you are talking about modifying objects with a large
number of fields.
Utilizing QControls and the code generator, Qcodo can generate MetaControl
classes for each
of your ORM classes. MetaControls
are essentially classes which contains functionality
to simplify the QControl
creation/definition, setup and data binding process for you.
Essentially, for each field in a class, you can have the MetaControl
return for you a data bound
and setup QControl
for editing, or even a QLabel
just for viewing. But because these MetaControls
are simply returning standard QControls, you can then modify them (stylizing, adding events, etc.) as you normally would
any other control.
You'll note in the PHP code that while it doesn't appear that we save that much in terms of Lines of Code,
you will note that some of the more tedious, non application-specific code of literally making calls like
$this->txtFirstName = new QTextBox($this)
and setting up the Text
is now done for you.
And because the MetaControl
will be able to keep track which
controls have been generated
thus far, you can call
(for example) SavePerson()
on the MetaControl
, and it will smartly go through any controls
created thus far and bind the data back to the Person object.
We show this in our example below, where we have clickable labels and hidden textboxes to
aid with the viewing and/or editing of Person #1.
Finally, note that because MetaControls
encapsulate all the functionality for a given
instance of a given object, and because it is able to keep track of and maintain its own
set of controls, you can easily have multiple MetaControls
on any QForm
if you want to view or edit multiple objects of any class at the same time.