Many thanks!
It is now working.
Here are the steps combined into a single routine...
extern GttWidget * curdlg; // of current dialog
void gettextwdht ( char * family , int ptsize , int weight , bool normalstyle ,
char * stringtomeasure ,
int * wdret , int * htret )
{
PangoFontDescription * fd = pango_font_description_new ( );
pango_font_description_set_family (fd, family );
pango_font_description_set_style (fd, normalstyle ? PANGO_STYLE_NORMAL :
PANGO_STYLE_ITALIC );
pango_font_description_set_variant (fd, PANGO_VARIANT_NORMAL);
pango_font_description_set_weight (fd, (PangoWeight)weight );
pango_font_description_set_stretch (fd, PANGO_STRETCH_NORMAL);
pango_font_description_set_size (fd, ptsize * PANGO_SCALE);
PangoContext * context = gtk_widget_get_pango_context ( curdlg ) ;
PangoLayout * layout = pango_layout_new ( context );
pango_layout_set_text ( layout, stringtomeasure, -1 );
pango_layout_set_font_description ( layout, fd );
pango_layout_get_pixel_size (layout, wdret , htret );
g_object_unref ( layout );
}
I really wanted a PangoContext that is not associated with the screen, like
above with a dialog widget, so that the calculations can be carried out totally
'offline'. I could not see how to do that.
Again, many thanks.
----------------------------------
you'll have to fill in a few blanks (previously created context and
description), but my code to do this is:
int fontSIZE(char *str, int fType, int type)
{
PangoLayout *layout;
int width, height, ret;
layout = pango_layout_new (font[fType].context);
pango_layout_set_text (layout, str, -1);
pango_layout_set_font_description (layout, font[fType].desc);
pango_layout_get_pixel_size (layout, &width, &height);
g_object_unref (layout);
switch(type)
{
case HEIGHT:
ret = height;
break;
case WIDTH:
ret = width;
break;
}
return(ret);
}
-----------------
On Tue, Aug 25, 2009 at 11:50 AM, Ken Resander <kresan...@yahoo.com> wrote:
I am translating a bunch of Windows programs that critically need to work
out pixel dimensions of a string (with no newlines in it).
On Windows I first call getfont:
void getfont ( char * fontfacename , int sizeinpts , int weight , HFONT *
hfret )
{
LOGFONT lf = usewindowsapifunctions ( fontfacename , sizeinpts , weight
);
*hfret = CreateFontIndirect ( &lf ) ;
}
and then for all strings to be measured call this:
int getpixeldims ( HFONT hf , char * stringtomeasure ,
int * widthret , int * heightret )
{
HDC hdc = GetDC ( 0 ); // device context of screen
HGIOBJ prev = SelectObject ( hdc , hf ); // add font to context
SIZE s;
int len = strlen ( stringtomeasure );
GetTextExtentPoint ( hdc , stringtomeasure , len , &s ); // measures
SelectObject ( hdc , prev );
ReleaseDC ( 0 , hdc );
*widthret = s.cx;
*heightret = s.cy;
}
I think I need Pango for this, but I have no idea how to use it. I have the
Pango reference manual and have read the tutorials by Tony Graham, but have not
found any examples to learn from.
Help would be most appreciated.
Get your new Email address!
Grab the Email name you've always wanted before someone else does!
http://mail.promotions.yahoo.com/newdomains/aa/_______________________________________________
gtk-list mailing list
gtk-list@gnome.org
http://mail.gnome.org/mailman/listinfo/gtk-list
