Timeout source is deleted from the mainloop... Re: Copying widget layout into a cairo layout

[Zoltan Boszormenyi <zboszor freemail hu>]

Hi,

thanks, it worked.

Another question: if my widget is put into a GtkFixed and:

        gtk_container_remove(GTK_CONTAINER(window), fixed);
        gtk_container_add(GTK_CONTAINER (window), fixed);

then the timeout source (whose data pointer is my scrolling label) is
destroyed.
Why is that?

Thanks in advance,
Zoltán Böszörményi

Behdad Esfahbod írta:
> The per-layout thing can be set using
> pango_cairo_context_set_resolution().
>
> behdad
>
> On 06/11/2009 11:36 AM, Zoltan Boszormenyi wrote:
>> Hi,
>>
>> I found this call to work OK:
>>
>> pango_cairo_font_map_set_resolution(pango_cairo_font_map_get_default(),
>>                       
>> gdk_screen_get_resolution(gdk_screen_get_default()));
>>
>> But it seems to me that it's a global setting, not a per layout thing.
>> I can't seem to get a PangoCairoFontMap out of a cairo_t.
>>
>> Thanks,
>> Zoltán Böszörményi
>>
>> Behdad Esfahbod írta:
>>> Humm, what happens if you get the PangoContext from the label, create
>>> layout, and render to your own cairo_t?  Should work.
>>>
>>> behdad
>>>
>>> On 06/11/2009 09:56 AM, Zoltan Boszormenyi wrote:
>>>> Hi,
>>>>
>>>> thanks very much, the font now is the same, but it's still a bit
>>>> larger,
>>>> see the attached picture. Is there some other option I can apply?
>>>>
>>>> Thanks in advance,
>>>> Zoltán
>>>>
>>>> Behdad Esfahbod írta:
>>>>> Try copying setting the font description of the label on your
>>>>> PangoContext. widget->style->font_desc.
>>>>>
>>>>> On 06/11/2009 08:33 AM, Zoltan Boszormenyi wrote:
>>>>>> Zoltan Boszormenyi írta:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I need to create a scrolling label widget.
>>>>>>> I already succeeded marrying gtklabel and gtkimage,
>>>>>>> I use a Cairo surface and created PangoLayout out of it,
>>>>>>> I render the label text into the Cairo+Pango layout,
>>>>>>> I use the expose method used by GtkImage to display
>>>>>>> the pixbuf in the widget, and added a timer so the
>>>>>>> pixbuf is scrolled in a double buffered way.
>>>>>>>
>>>>>>> Now, the problem is that the text rendered into the pixbuf
>>>>>>> is much larger than the usual widget texts, like on stock
>>>>>>> GtkButton and GtkLabel. I attached the screenshot from
>>>>>>> my example application.
>>>>>>>
>>>>>>> How can I copy the PangoContext that a plain widget use?
>>>>>>> E.g. the following code doesn't seem to work:
>>>>>>>
>>>>>>> =================================
>>>>>>>      label->surface =
>>>>>>> cairo_image_surface_create_for_data(cairo_data,
>>>>>>>                            CAIRO_FORMAT_ARGB32, width, height,
>>>>>>> rowstride);
>>>>>>>
>>>>>>>      label->cairo = cairo_create (label->surface);
>>>>>>>
>>>>>>>      label->layout = pango_cairo_create_layout(label->cairo);
>>>>>>>
>>>>>>>      /* This is the layout used by GtkLabel, etc. */
>>>>>>>      layout = gtk_widget_create_pango_layout (GTK_WIDGET (label),
>>>>>>>                                  "This long string gives a good
>>>>>>> enough
>>>>>>> length for any line to have.");
>>>>>>>
>>>>>>>      pango_cairo_context_set_font_options(
>>>>>>>                pango_layout_get_context(label->layout),
>>>>>>>
>>>>>>> pango_cairo_context_get_font_options(pango_layout_get_context(layout)));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>      pango_cairo_update_context(label->cairo,
>>>>>>> pango_layout_get_context(layout));
>>>>>>>      pango_layout_context_changed(label->layout);
>>>>>>>
>>>>>>>      g_object_unref (layout);
>>>>>>> =================================
>>>>>>>
>>>>>>> What is the proper way to get the same font, fontsize, etc. on a
>>>>>>> Cairo
>>>>>>> layout?
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Zoltán Böszörményi
>>>>>>>
>>>>>> The following code also doesn't work, I get the same large font
>>>>>> for my GtkScrollLabel that my previously attached screenshot showed:
>>>>>>
>>>>>>      label->cairo = cairo_create (label->surface);
>>>>>>      pango_cairo_update_context(label->cairo,
>>>>>> gtk_widget_get_pango_context
>>>>>> (GTK_WIDGET(label)));
>>>>>>      label->layout = pango_cairo_create_layout(label->cairo);
>>>>>>
>>>>>> Is there and easy way to render the text in the same size as
>>>>>> GtkLabel's default?
>>>>>>
>>>>>> Thanks in advance,
>>>>>> Zoltán Böszörményi
>>>>>>
>>>>>> _______________________________________________
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>>>>>> http://mail.gnome.org/mailman/listinfo/gtk-list
>>>>>>
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>>
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