Re: [Java-gnome-developer] assorted notes

[Joao V. <jvi...@ya...>]

Hey, talk about lots of good suggestions... i'm saving these notes; but please keep sending 'em...

Cheers,
J.V.



--- Havoc Pennington <hp...@re...> wrote:
> Hi,
> 
> Playing with java-gnome today, I encountered a number of suggestions and
> problems, some of them surely my fault (I'm not a Java programmer
> really). I'll just write them down and you guys can filter the
> worthwhile ones.
> 
> - general observation: http://mail.gnome.org/archives/gtk-devel-list/2005-March/msg00175.html
>  - please kill color allocation, that's very easy and 
>    nobody understands it...
>  - main loop should be on the glib level
>  - kill GtkObject from the hierarchy
> 
> - ah, another one I forgot in the gtk-devel-list post: delete_event should be moved
>   from GtkWidget to GtkWindow, people confuse it with the destroy signal so it's 
>   a real improvement to do this
> 
> - the constructor for GC should take a Drawable rather than Window
> 
> - I can't seem to construct a Point because of a runtime link error
>   finding gdk_point_new
> 
> - I can't seem to construct a Segment because the only constructor
>   takes a Handle
> 
> - the JNI for draw_lines() looks fishy to me (array of Point* instead of 
>   array of Point?) but I'm too lazy to investigate enough to be sure
> 
> - I find Drawable.getDimension() pretty strange; plus the temporary 
>   Dimension object isn't efficient. I'd suggest just getWidth()/Height()
> 
> - I can't figure out how to get a ConfigureEvent on widgets, needed to 
>   use DrawingArea
> 
> - building cairo-java I get an error because jg_jnu.h includes glib.h but 
>   the appropriate cflags -I/usr/include/glib-2.0 weren't on the compile line
> 
> - PDF part of cairo-java is out of date (kristian probably broke it recently)
> 
> - .pc file says "javagnome0.1.jar" but it's installed as "java-gnome0.1.jar" with 
>   a hyphen
> 
> - libgtk-java seems to include Cairo jar but not java-gnome0.1.jar in classpath
> 
> - src/java/org/gnu/gdk/Color.java:163:
> gdk_cairo_set_source_color(org.gnu.glib.Handle,org.gnu.glib.Handle) in
> org.gnu.gdk.Color cannot be applied to
> (org.gnu.javagnome.Handle,org.gnu.glib.Handle)
>                 gdk_cairo_set_source_color(cairo.getHandle(), getHandle());
>                 ^
> 
> - the TextView "action" signals should not be exported as signals, they 
>   aren't something application code would connect to (this is true of 
>   all action signals really, they are only used to configure keybindings)
> 
> - isn't the Handle interface pretty expensive vs. just using "long"?
> 
> - there are a lot of members in GObject and Widget as well, which is 
>   quite a bit of overhead... most of them seem listener-related. I wonder
>   if there's a better approach.
> 
> Hope this is helpful, thanks for the software!
> 
> I haven't worked on bindings stuff since around the GTK+ 2.0 release
> time so forgive any rusty thinking.
> 
> Havoc
> 
> 
> 
> 
> 
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