[zivgr]

Hi,
Does someone know what's the difference between high-level events and low-level events?

Thanks in advance.

[shmoove]

High level events have a higher level of abstraction. They are specifically the Command-related and the Item-related events. You don't know exactly what key(or keys) on the phone the user pressed, you just know he has selected one of your Commands or edited a TextField or whatever....
Low level events are closer to the hardware: a key was pressed, the screen is being repainted, etc...

shmoove

[zivgr]

Many thanks for the answer.
I saw that the interface "CommandListener" is used to receive the high-level events. Which interface is used to receive low-level events?
Thanks.

[shmoove]

For low level events there is no interface needed, because the there is only one Displayable that can process these events: the Canvas.
So, for low-level events you just have to override the paint(), keyPressed(), keyReleased() and keyRepeated() when you subclass Canvas (these methods have an empty implementation in the original Canvas class).

shmoove

[edit]
I forgot to mention there are also pointerPressed(), pointerDragged(), and pointerReleased() methods, that can also process low level events. You can use hasPointerEvents() and hasPointerMotionEvents() to find out if a device supports this type of input...
[/edit]