I'd suggest cacheing the pixel value, not the value value. It's an easy
fix and I can go through and do it while I'm waiting for other bugs to
surface after trying to make all the 0.44-critical changes on the pile.
(these are resolving my having broken the "new build system" in my impoartation
of portaudio, and also finally acting on the hip~ and inlet~ bugs.)
cheers
Miller
On Fri, Nov 30, 2012 at 11:20:53PM -0500, Hans-Christoph Steiner wrote:
>
> Lots of patches use the built-in GUI objects for displays, and often a fast
> stream of events is hooked straight up to the GUI object, causing the GUI
> object to send many pointless updates, like draw commands when the number
> hasn't changed, or multiple draw commands per screen refresh cycle.
>
> I propose to only send the GUI update commands when the relevant value has
> changed. I think this should apply to both the main element, like the slider
> knob, and the label for that GUI object, since that's often used as a
> display. The code change is pretty simple, but I was wondering if people
> thought there could be any problems caused by this
>
> Here is the needed change, for example, for the hslider knob:
>
> index b352fb9..88681fc 100644
> --- a/src/g_all_guis.h
> +++ b/src/g_all_guis.h
> @@ -185,6 +185,7 @@ typedef struct _hslider
> t_iemgui x_gui;
> int x_pos;
> int x_val;
> + int x_prev_val;
> int x_center;
> int x_thick;
> int x_lin0_log1;
> index 470771a..e1a3c83 100644
> --- a/src/g_hslider.c
> +++ b/src/g_hslider.c
> @@ -33,7 +33,7 @@ static t_class *hslider_class;
> static void hslider_draw_update(t_gobj *client, t_glist *glist)
> {
> t_hslider *x = (t_hslider *)client;
> - if (glist_isvisible(glist))
> + if (glist_isvisible(glist) && x->x_val != x->x_prev_val)
> {
> int r = text_xpix(&x->x_gui.x_obj, glist) + (x->x_val + 50)/100;
> int ypos=text_ypix(&x->x_gui.x_obj, glist);
> @@ -57,6 +57,7 @@ static void hslider_draw_update(t_gobj *client, t_glist
> *glist)
> x->x_thick = 0;
> }
> }
> + x->x_prev_val = x->x_val;
> }
> }
>
>
>
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