Re: Not a regression, but shuld go into emacs-24

[Jan D.]

martin rudalics skrev 2014-06-03 09:23:
>  >> IIUC in XmCR_DRAG we set PORTION to 'cs->value',
>  >
>  > XmCR_DRAG is jump in Motif speak.
>
> So is "dragging the slider" equivalent to 'jump' in Emacs speak?  Then I
> misunderstood the nomenclature completely.  I always thought a 'jump' is
> what happens when I click some position above or below the slider.

It is equivalent in Motif and Gtk+ speak, i.e. the callback can't 
distinguish between the two.  Dragging and jumping are handeled the same.

>  >> and in xaw_scroll_callback we explicitly
>  >> pass 'position' as PORTION argument.
>  >
>  > Because that callback does not distinguish between the different
> scroll modes.
>
> What is a "scroll mode"?  Something like "page increment" or "jump
> scroll"?

Yes, page increment/decrement, and step increment/decrement are modes.
As is drag and jump.

>  >>> The values of PORTION in x_send_scroll_bar_event and
>  >>> x_set_toolkit_scroll_bar_thumb are different.  The first has values as
>  >>> defined by the scroll bar.  For Gtk+, Motif and Xaw this is a value
>  >>> between 0 or 1 and 10000000.
>  >>
>  >> Yes (in my experience Gtk+ can handle WHOLE directly as is).
>  >
>  > This looks ugly when WHOLE changes.  The Gtk+ scroll bar does not
> redraw nicely.
>
> In what sense?  Does it flicker?

I haven't tried lately, but Gtk+ 2 flickered a lot when its maximum 
value changed.  For example typing at the bottom of a buffer would 
change the value for every key press.

        Jan D.