| 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 <kresander 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. |