Re: having a scollable widget

[jrb redhat com]

Havoc Pennington <hp redhat com> writes:

> gregor waltz villanova edu writes: 
> > so for 1.3.x, the widget should listen for the
> > set_scroll_adjustments_signal then use gdk_window_scroll? 
>
> Nope, the set_scroll_adjustments_signal is just how the scrolled
> window will give you your adjustments. Then you have to set all the
> values in the adjustments, and scroll when adjustment->value changes. 
> Normally you use adjustment->value to represent the X or Y coordinate
> to scroll to.
>
> I forgot to mention the bin_window thing - you want widget->window to
> stay fixed and be the size of your widget size allocation, and then
> you scroll the bin_window around inside it. bin_window should be the
> size of the entire scrollable area.
>
> GtkTextView uses this technique.
>
> GtkTreeView and GtkLayout look like they're using gdk_window_move()
> instead of gdk_window_scroll(), I'm not sure what's up with that, I
> have to ask Jonathan and Owen.

GtkTreeView originally inherited from GtkLayout, then copied some of the
code directly.  That's where it's gdk_window_move came from.  Looking
quickly at the code, I think I want to be using gdk_window_scroll
instead.

-Jonathan