Re: GdkFont->Pango replacement

[Havoc Pennington <hp redhat com>]

Deepa Chacko Pillai <deepa chacko wipro com> writes:
> 
> I am facing few problems when I replace gdk_draw_string with pango
> equivalents. I am using PangoLayout.
> 
> *    Earlier gdk_font_width () used to give the distance from the
> beginning of the current string to the point where the next string is to
> be drawn. The closest equivalent I found to this is
> pango_font_metrics_get_approximate_char_width (metrics).  It gives the
> character width. Can I multiply this by the length of the string to get
> string width as given by gdk_font_width ()? Or is there any other way
> for doing this?
> 

You need to rewrite the code to create the layout and call
pango_layout_get_pixel_extents() to get its size.

> *    To replace gdk_draw_string (), I do the following
>            GtkWidget *area;
>            PangoLayout *layout;
>            GdkPixmap *pixmap;
>            layout = gtk_widget_create_pango_layout (area, "");
>            pango_layout_set_text (layout, string, -1);
>            gtk_paint_layout (area->style,
>                                           pixmap,
>                                           GTK_WIDGET_STATE (area),
>                                           FALSE,
>                                           NULL,
>                                           area,
>                                           NULL,
>                                           x,
>                                           y,
>                                           layout);

That's right if the layout should be "themed", if it shouldn't be
themed then it should just be gdk_draw_layout() instead of
gtk_paint_layout(). 

You probably don't need the pixmap with GTK 2.

It all depends a bit on the specific code you are working on.

Havoc