[gtkdatabox] more commits

["Amish S. Dave" <amish amishdave net>]

Hey guys,

I've pushed three commits to the cairo-alpha branch on sourceforge.

The first is a minor fix to gtkdatabox.spec and gtkdatabox.pc

The second fixes the autoconf build system a bit as described in my 
earlier email, so as to facilitate cross-compilation.  A windows DLL 
should now be able to be generated.  Also, it makes a shared library on 
Linux as well.  Unfortunately, it defaults to doing so on Linux, which 
has the consequence that the example program binaries are now put in 
examples/.libs and the executables in examples are libtool shell 
scripts.  This is an autoconf feature, I guess.  Anyway, if you use gdb 
on the example programs, would need to gdb examples/.libs/basics instead 
of gdb examples/basics
Or you could call ./configure --disable-shared to restore the original 
behavior.

The third commit fixes a bug I introduced in porting gtkdatabox.c to 
gtk3.  The bug is in zooming.  Try running the basics example, and zoom 
in only only one cycle or half-cycle of the sine-wave.  It won't zoom on 
what you want. The problem was that the original code had called 
gtk_adjustment_set_page_size() before calling gtk_adjustment_set_value() 
which is correct.  I had reversed the two.  If page_size was kept at 1.0 
(full-width), and value was set to something other than 0, gtk didn't 
allow a change in value (because value + page_size would be greater than 
upper.  Anyway, zooming now works correctly.

Sincerely,
--
Amish