Hi,
Eero Tamminen kirjoitti 28.12.2005 kello 17.10:
Hmm, yep it flickers but on the other side resizing windows or
sub-windows is incredible slow with GTK2.
I think this might be due to high amount of signaling, especially
with deep widget hierarchies.
I think it's mostly because of how gtk+ handles size allocations. By
default, when a widget's size changes, all of it is redrawn. In other
words, an "expose-event" covering whole of the widget's area is
generated whenever there's a "size-allocate" event. And there's
plenty of such events, when you slowly resize the toplevel window...
There's a GTK_REDRAW_ON_ALLOC flag (defaulting to TRUE) in GtkWidget.
Some stock widgets, such as GtkTreeView and GtkTextView unset the
flag and take care of invalidating areas that need to be redrawn, and
therefore resize more smoothly. But chances are there are many custom
widget implementations that rely on the sub-optimal default
behavior... I am not sure if that should be blamed on the toolkit,
though.
BR,
Lassi
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