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[STR New]
Link: http://www.fltk.org/str.php?L1948
Version: 1.3-current
This bug also exists in 1.1.9 (and possibly the 2.x tree).
The emulation of glutIdleFunc() by the Fltk glut compatability code works
in such a way that *only* the glut idle finction can exist. Any other idle
functions in use, manipulated by the regular fltk add_idle / remove_idle
functions will become broken if glutIdleFunc() is used in the same
application as them.
The attached patch files fix up glut_compatability.cxx and FL/glut.H to
make things work better.
One thing that occurs to me (from some further tests) is that if we take
this patch (or even if we don't!) then it might be a Good Idea to put
something in the docs to warn the end users not to mix'n'match using
glutIdleFunc() with the Fl::[add|remove]_idle() methods, for the glut
windows...
With the patch in, the idea is that you can use FL::[add|remove]_idle()
for your non-glut code and *either* glutIdleFunc() *or*
Fl::[add|remove]_idle() for the glut windows - and the glutIdleFunc()
*will not* break the other fltk idle functions (whereas the current
implementation of glutIdleFunc() *does* break the fltk idle functions.
As I discovered the hard way...)
Link: http://www.fltk.org/str.php?L1948
Version: 1.3-current
--- ../fltk-1.1/FL/glut.H 2008-04-26 23:13:06.000000000 +0100
+++ ./fltk-1.1/FL/glut.H 2008-04-29 20:19:24.000000000 +0100
@@ -68,6 +68,7 @@
void (*motion)(int x, int y);
void (*passivemotion)(int x, int y);
void (*entry)(int);
+ void (*idle)(); // glut idle function for this window
void (*visibility)(int);
void (*special)(int, int x, int y);
Fl_Glut_Window(int w, int h, const char *);
@@ -79,7 +80,7 @@
extern FL_EXPORT int glut_menu; // the current menu
// function pointers that are not per-window:
-extern FL_EXPORT void (*glut_idle_function)();
+extern FL_EXPORT void (*glut_idle_function)(); // I don't understand what
these are for - IMM
extern FL_EXPORT void (*glut_menustate_function)(int);
extern FL_EXPORT void (*glut_menustatus_function)(int,int,int);
@@ -237,7 +238,8 @@
inline void glutVisibilityFunc(void (*f)(int s)) {glut_window->visibility=f;}
enum {GLUT_NOT_VISIBLE, GLUT_VISIBLE};
-inline void glutIdleFunc(void (*f)()) {Fl::set_idle(f);}
+//inline void glutIdleFunc(void (*f)()) {Fl::set_idle(f);}
+FL_EXPORT void glutIdleFunc(void (*f)()) ; // {Fl::set_idle(f);}
// Warning: this cast may not work on all machines:
inline void glutTimerFunc(unsigned int msec, void (*f)(int), int value) {
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