Re: Copying widget layout into a cairo layout

Humm, what happens if you get the PangoContext from the label, create layout, and render to your own cairo_t? Should work.


On 06/11/2009 09:56 AM, Zoltan Boszormenyi wrote:

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,

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:

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,

    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.");




    g_object_unref (layout);

What is the proper way to get the same font, fontsize, etc. on a Cairo

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
    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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