python - Calculate size of textstring in pygtk pango for text fill -

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i'm searching method pre calculate width of text string variable length python gtk/pango. want use adjusting text size automatically fill given space, gui can displayed different resolutions , text of labels or buttons or whatever should adjust given resolution use maximum possible font size without braking boundaries.

i have workaround now, slow method , think there must better:

def buttonschriftanpassen(self, aktiverbutton, inbox):     '''function set fint size of directory/category buttons use  max. amount of available space'''     if inbox == true:         aktiverbutton.show()          gewolltebreite = aktiverbutton.get_parent().get_allocation()[2]         gewolltehoehe = aktiverbutton.size_request()[1]         maximalebreite = gewolltebreite     elif aktiverbutton.get_label() == "home" or aktiverbutton.get_label() == "hauptmenue":         #print aktiverbutton.get_label()         gewolltebreite = aktiverbutton.size_request()[0]         gewolltehoehe = aktiverbutton.size_request()[1]         maximalebreite = gewolltebreite -(0.2*gewolltebreite)#* 1000      else:         gewolltebreite = aktiverbutton.size_request()[0]         gewolltehoehe = aktiverbutton.size_request()[1]         maximalebreite = gewolltebreite # -(0.4*gewolltebreite)#* 1000      schriftgroessenfaktor = gewolltehoehe * 1000      templabel = gtk.label(aktiverbutton.get_label())     temppangoliste = pango.attrlist()     xtemp = pango.attrsize(schriftgroessenfaktor, start_index=0, end_index=-1)     temppangoliste.insert(xtemp)     templabel.set_attributes(temppangoliste)     abmessungentemplabel = templabel.get_layout().get_pixel_size()      while abmessungentemplabel[0] > maximalebreite:         schriftgroessenfaktor = schriftgroessenfaktor - 1000         xtemp = pango.attrsize(schriftgroessenfaktor, start_index=0, end_index=-1)         temppangoliste.insert(xtemp)         templabel.set_attributes(temppangoliste)         abmessungentemplabel = templabel.get_layout().get_pixel_size()      x = xtemp      pangoliste = pango.attrlist()      pangoliste.insert(x)     aktiverbutton.child.set_attributes(pangoliste)

it builds temporary invisible label sets parameters , shrinks long measured extends bigger max. allowed size.

if there other function "filling" of text appreciate hear.

you render string pango , size.

example:

def get_pango_string_size(str, font_name=text_font):        label           = gtk.label()     pango_layout    = label.get_layout()         pango_layout.set_markup(str)         pango_font_desc = pango.fontdescription(font_name)         pango_layout.set_font_description(pango_font_desc)         return pango_layout.get_pixel_size()

(taken http://python.6.x6.nabble.com/getting-string-with-in-pixels-td1944346.html)


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