Roman Kantor wrote:
Nope, your example shows for me also more FL_LEAVE events than FL_ENTER
ones. It also gets FL_LEAVE events when dragging cursor within the
opengl window so in such a case the cursor is wrongly changed from
"hand" to "normal". I will try to investigate it little bit more...
Using VC2005 on WinXP, vanilla fltk-1.1.9.
I can confirm what Ian wrote: it works for me with gcc (cygwin
-mno-cygwin) on WinXP with FLTK 1.3 as well as 1.1.9 without problems,
compiled with
fltk-config --use-gl --compile fl_leave.cxx
(see attached file fl_leave.cxx). I added a counter ("in"), and I get
values of 0 and 1 only, even if I drag the mouse.
Is there any chance that another application steals the focus (this can
maybe generate FL_LEAVE events). Do you have "point-to-focus" enabled?
(Yes, it is possible in WinXP, I know someone who uses it).
Albrecht
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/gl.h>
#include <FL/names.h>
#include <FL/Fl_Gl_Window.H>
#include <stdio.h>
Fl_Window *main_win = 0;
class gl_win_test : public Fl_Gl_Window{
public :
gl_win_test(int X,int Y,int W,int H,const char*L=0);
int handle(int ev);
private:
void draw();
};
gl_win_test::gl_win_test(int X,int Y,int W,int H,const char*L) :
Fl_Gl_Window(X,Y,W,H,L){}
void gl_win_test::draw() {
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_LINE_STRIP);
glVertex2f(w(), h());
glVertex2f(-w(),-h());
glEnd();
}
int gl_win_test::handle(int ev) {
int res = Fl_Gl_Window::handle(ev);
static int in = 0;
if (ev == FL_ENTER) {
cursor(FL_CURSOR_HAND);
res = 1;
in++;
}
else if (ev == FL_LEAVE) {
cursor(FL_CURSOR_DEFAULT);
res = 1;
in--;
}
// if (ev != FL_MOVE)
printf ("event: %-12s res: %d, in:%2d\n",fl_eventnames[ev],res,in);
return res;
}
int main(int argc, char **argv)
{
setvbuf( stdout, NULL, _IONBF, 0 );
main_win = new Fl_Window(700, 500, "GL test");
main_win->begin();
gl_win_test *engine = new gl_win_test (10, 10, 500, 350);
main_win->end();
main_win->show(argc, argv);
return Fl::run();
}
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