Hi,
sounds like a good idea.
While I dont know enough python C extension syntax, I can provide the code
for the gtk part. Pseudo code is like this:
def GtkImage.set_from_file(self, arg):
GdkPixbufLoader *loader;
int readcnt;
char buf[4096];
if type(arg) != type(file):
return native_gtk_image_set_from_file(self.underlying, arg.char*)
loader = gdk_pixbuf_loader_new()
do:
readcnt,buf = arg.read(sizeof(buf))
if readcnt > 0:
gdk_pixbuf_loader_write(loader, buf, readcnt)
while readcnt > 0
if readcnt == -1:
g_object_unref(loader)
raise error
gdk_pixbuf_loader_close(loader)
pixbuf = gdk_pixbuf_loader_get_pixbuf(loader)
if pixbuf:
g_object_ref(pixbuf)
else:
g_object_unref(loader)
raise error
g_object_unref(loader)
self.set_from_pixbuf(pixbuf)
Someone else please put in the stuff I dont know know to implement, which
is:
- if type(arg) != type(file)
Dont know if that is checked that easily or if rather every python object
that has a read method should work. if so, it should be checked if the read
method is present in the arg object
- arg.read
This is supposed to call the read method and store the result in buf and
readcount. Should probably also handle exceptions gracefully:
- handle (and pass to caller) python exceptions correctly (or are they just
fired after the interpreter returns to interpreting? - note that the read
call also needs to be interpreted so that could intercept the exception from
the previous read if not having the exception serve as a break condition for
the loop)
cheers,
Danny
> I think that some methods like gtk.Image.set_from_file() should > accept
as argument not only the filename as string but also a
> file object.
> In this way should be possible to use file-like objects as
> StringIO, when for example you have an in Image represented
> in a string and you don't want to write it to a file and
> then read it again.
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