In Fl_Slider.H there are definitions that are used for "subclasses":
<pre>
// values for type(), lowest bit indicate horizontal:
#define FL_VERT_SLIDER 0
#define FL_HOR_SLIDER 1
#define FL_VERT_FILL_SLIDER 2
#define FL_HOR_FILL_SLIDER 3
#define FL_VERT_NICE_SLIDER 4
#define FL_HOR_NICE_SLIDER 5
</pre>
although the class documentation doesn't mention the first two, it
uses the values defined in Fl_Valuator.H instead:
<pre>
// shared type() values for classes that work in both directions:
#define FL_VERTICAL 0 ///< The valuator can work vertically
#define FL_HORIZONTAL 1 ///< The valuator can work horizontally
</pre>
and indeed Fl_Slider makes use of Fl_Valuator::horizontal() which tests
type() against FL_HORIZONTAL.
In "Adding and Extending Widgets" it says that type() "is an arbitrary
8-bit identifier" and "you can use it for any purpose you want".
It seems to me that if I subclass some existing widgets, such as
Fl_Slider, then I am not completely free to overwrite type() with
my own arbitrary values.
Therefore, are there general guidelines on type(), or do they only
apply on widget-by-widget basis?
D.
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