Attributes |
Attributes define the properties of an object.
Any class defines its own attributes.
The class of an attribute defines in which context it can be used:
| Class | Description |
|---|---|
| I | The attribute can be used at object creation time (Init) |
| S | The attribute can be Set |
| G | The attribute can be read (Got) |
| N | The attribute is Notified by the object |
An attribute may be in more than a class, e.g. Activate attribute of Window class is ISGN: it can be used at Init-time, set, read and it is notified by RxMUI.
The type of an attribute defines its format:
| Type | Description |
|---|---|
| S | The attribute is a String |
| N | The attribute is a Number |
| M | The attribute is Mixed : it can be set as a string or a number |
| B | The attribute is a Boolean (it is N too) |
| C | The attribute is a Char (a S with len 1) |
Other properties are:
| Property | Description |
|---|---|
| CND | Needed in a Class (e.g. Contents attribute of Window class is Needed at Init time and so it is IND) |
| G2N | The attribute is Mixed but when it is read or notified, it becomes a Number (e.g. Active attribute of List class may be specified at Init or Set time as a string or a number - it is Mixed - but when it is read or notified it is always a number, so it is a G2N) |