> Could anyone suggest me a sample code about the possibility to move a =
> slider by the up/down keys?
> Thank you in advance.
> Ivano
Hi,
I don't have time right know to build an example, but looking at the Fl_Slider
code we have:
int Fl_Slider::handle(int event, int X, int Y, int W, int H) {
..
case FL_KEYBOARD :
switch (Fl::event_key()) {
case FL_Up:
if (horizontal()) return 0;
handle_push();
handle_drag(clamp(increment(value(),-1)));
handle_release();
return 1;
case FL_Down:
if (horizontal()) return 0;
handle_push();
handle_drag(clamp(increment(value(),1)));
handle_release();
return 1;
case FL_Left:
if (!horizontal()) return 0;
handle_push();
handle_drag(clamp(increment(value(),-1)));
handle_release();
return 1;
case FL_Right:
if (!horizontal()) return 0;
handle_push();
handle_drag(clamp(increment(value(),1)));
handle_release();
return 1;
default:
return 0;
}
.
}
So, by the code, we know that we already have support for up and down, but just
when the component is vertical. If you want to have up and down keys changing a
horizontal slider, then you probably are going to need to subclass Fl_Slider
and override 'int Fl_Slider::handle(int event, int X, int Y, int W, int H)'
method handling Fl_Up and Fl_down to handle both cases(horintal and vertical),
and the other events you could just forward to Fl_Slider::handle().
Sorry for not post a complete solution, but I think that this ideas could solve
your problem!
J. Marcelo Auler
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