Object-Orientation with XOTcl Components and Object Introspection - Tutorial
In this section you will learn about dynamic and object-oriented aspects of XOTcl programming in XOTclIDE.
Load Sample Application
Start the XotclIDE per
[artur@rybnik xotclIDE]$ ./XotclIDE |
Create an Instance of one Class
Now it is time to create some instance of Railroad class. Select the Railroad class in Class view and choose the menu Class->Create Instance you will see following dialog
In this dialog you can specify the arguments (or additional arguments) for init method (passed to init method or parameters). The class definition of Railroad is
Class Railroad -parameter {{speed 4}} |
Object Inspector
The new created object of class Railroad build a window and gets run.
Additional XOTclIDE shows an another window called object inspector browser. This window shows the internal structure of XOTcl objects. You can see its variables (attributes), subobjects (aggregated objects) and methods.
You can modify the object state per changing variable. Choose the speed variable. You should see the value 4 in your edit-area view. So type 20 in this area and press Control-S or choose menu Edit->Save Have you noticed that, the rail have speeded up.
You can also invoke methods on an object directly in Object Inspector. Select emergencyBreak method and choose menu Method->Invoke. You can also specify which method you should see (only from Railroad or also inherited from Object or Superclasses). You can even see the method available per mixin on viewed object.
