> To get key events your widget must return 1 on FL_PUSH and FL_FOCUS
> events. I don't think that Fl_Box::handle() would do this, so you'd
> better add this in your handle() method. Then you must click once in
> your canvas, and your widget should get key events.
Here's a working example (use it in your first version).
int Canvas::handle(int event) // handle the event
{
switch(event)
{
case FL_KEYBOARD:
switch(Fl::event_key())
{
case FL_Right:
XC = XC + 1;
YC = YC + 1;
redraw();
return 1;
case FL_Left:
XC = XC - 1;
YC = YC - 1;
redraw();
return 1;
default:
return 1; // "eat" all other keys !
}
case FL_FOCUS:
case FL_PUSH:
return 1;
default:
return Fl_Box::handle(event);
}
}
The "return 1" with the comment '"eat" all other keys' prevents that all
other keys are delivered as FL_SHORTCUT events to other widgets. You can
also return 0 here, YMMV.
Albrecht
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