GTK label 字体改变方法

 GTK label 字体改变方法：
60     /*label*/
61   //lbl_test = gtk_label_new  (_("/345/255/227/344/275/223/346/265/213/350/257/225"));
62   lbl_test = gtk_label_new (_("Label Test 测试"));
63
64   PangoFontDescription *font_desc = pango_font_description_from_string("Sans");
65   pango_font_description_set_size (font_desc, 25 * PANGO_SCALE);
66   gtk_widget_modify_font (lbl_test, font_desc);
67
68   gdk_color_parse ("red", &color);
69   gtk_widget_modify_fg(lbl_test, GTK_STATE_NORMAL, &color);
70
71   gtk_widget_show (lbl_test);
72   gtk_box_pack_start (GTK_BOX (vbox1), lbl_test, TRUE, TRUE, 0);
73     /*label end---*/
74
75     /*button*/
76   //button1 = gtk_button_new_with_mnemonic (_("button1"));
77   button1 = gtk_button_new_with_label (_("button1"));
78   //button1 = gtk_button_new_from_stock (GTK_STOCK_OK);
79   //button1 = gtk_button_new_from_stock ("lbl_button");
80   //gtk_button_set_use_sto