Re: Version 0.8.2.2: Ruler updates 'smearing'

["Dr. Roland Bock" <box2OO6 eudoxos de>]

Hi John,

nice photo of you, and yes, the application does look awful.

Hmm. Since I am also not really themes expert (never cared about them, 
my windows are still grey), I can only guess (and hope for more 
knowledgeable readers of this mailing list):

I quickly went through the code of the gtkdatabox_ruler. The only thing 
that caught my eye is the following:

gdk_draw_drawable (widget->window,
             widget->style->black_gc,
             ruler->priv->backing_pixmap,
             ruler->priv->xsrc, ruler->priv->ysrc,
             ruler->priv->xsrc, ruler->priv->ysrc, bs_width, bs_height);

The black_gc probably needs to be replaced by 
fg_gc[GTK_WIDGET_STATE(ruler)]. It does do no harm on my machine and 
seems to be more consistent.

Let me know, if that helped...


Regards,

Roland



John Smith wrote:
> Roland:
>
> Thanks for the speedy response!
>
> It turns out that the example program basics does the same thing on my 
> target platform.
>
> In addition it appears that the problem is related to a GTK+ theme. I 
> happen to be using Aero-ion3.1 theme that has a black background - this 
> is where the problem is apparent. However if I select another theme such 
> as Clearlooks with a light background the scale appears 'the way it 
> should'.
>
> I've attached a photo of basics started when the Aero-ion3.1 theme is 
> selected.
>
> Hope this helps...
>
> snafu
>
>  > Date: Wed, 15 Oct 2008 20:38:09 +0200
>  > From: box2OO6 eudoxos de
>  > To: gtkdatabox-list gnome org
>  > Subject: Re: Version 0.8.2.2: Ruler updates 'smearing'
>  >
>  > Hi John,
>  >
>  > since version 0.8.0.0, GtkDatabox comes with its own rulers.
>  >
>  > The old gtk+ rulers have several problems, when ranges are very big or
>  > very small. The gtk+ developers are aware of this and will eventually
>  > remove the current rulers from gtk+. The GtkDatabox rulers aim at
>  > dealing better with extreme ranges while being at least as good with
>  > 'normal' ranges.
>  >
>  > In addition, the GtkDatabox rulers support logarithmic scaling.
>  >
>  > Your's is the first negative feedback regarding the new rulers, if I am
>  > not mistaken.
>  >
>  > The only 'new' thing for you to that I can think of is: If you took care
>  > of placing the rulers yourself in your old code (instead of using
>  > gtk_databox_create_box_with_scrollbars_and_rulers), you would need to
>  > modify your code to use the new rulers. Since your code obviously
>  > compiles, there is nothing 'new' I can think of. Sorry.
>  >
>  > Also, I have no experience with the ARM platform at all.
>  >
>  > So what can be done?
>  >
>  > First of all, can you please try to zoom in and out with the examples,
>  > which come with the library? This basically has the same effect for the
>  > rulers as auto-rescaling. Do you see the same effect there?
>  >
>  > Second, can you reproduce the effect with a minimal program that you can
>  > share so that others can check whether the see the same effect?
>  >
>  > Third: The rulers are using cairo and I am certainly not the most
>  > knowledgeable person when it comes to cairo. So I suspect that there is
>  > something not done in the right way with cairo.
>  >
>  > Maybe some cairo expert can take a closer look?
>  >
>  >
>  > Regards,
>  >
>  > Roland
>  >
>  >
>  >
>  >
>  > John Smith wrote:
>  > > Platform: ARM 920T (Cirrus Logic EP9315)
>  > > Kernel 2.6.21.5
>  > > GTK+ Version 2.10.14
>  > > X-Windows: Kdrive
>  > > Build System: Angstrom/OpenEmbedded
>  > > gcc Version: 4.1.2
>  > >
>  > > Application: Updating plot with 'real-time' data and auto-scaling
>  > > periodically.
>  > >
>  > > Was using rev 0.6.0.0 without a problem. Updated to 0.8.2.2 and now 
> the
>  > > rulers become all smeared and illegible.
>  > >
>  > > Is there something 'new' that has to be done or set with the new 
> version?
>  > >
>  > > Thanks in advance,
>  > >
>  > > snafu
>  > >
>  > > 
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