How to change font size of GtkComboBox's items?

greenstream · **Joined:** Wed Nov 21, 2007 8:50 am **Posts:** 4

Hi all,
I need change font size of text items of GtkComboBox, but I don't know any way.
Also, I need change size of GtkComboBox in the window, maybe larger or smaller than the default size.
Please give me some way!
thank you !

openldev · **Posted:** Thu Nov 22, 2007 2:23 pm

You can modify the font of any widget with gtk_widget_modify_font(). More information can be found at: http://library.gnome.org/devel/gtk/unst ... odify-font

You need PangoFontDescription to use this function. You can create an object of this type with pango_font_description_from_string(), found at: http://library.gnome.org/devel/pango/st ... rom-string

greenstream · **Joined:** Wed Nov 21, 2007 8:50 am **Posts:** 4

Thank you,
But I don't know why I used gtk_widget_modify_font () unsuccessfully. This function has effective when I use for GtkLabel, GtkTextView, label on GtkButton, but GtkComboBox can't be affected.
My code:
/* create combo box*/
result->combo_marker = gtk_combo_box_new_text();
/* set font */
gtk_widget_modify_font (result->combo_marker, font_desc);
gtk_combo_box_append_text(GTK_COMBO_BOX(result->combo_marker), const gchar*)"Square");
gtk_combo_box_append_text (GTK_COMBO_BOX(result->combo_marker), (const gchar*)"Rectangle");
gtk_combo_box_set_active (GTK_COMBO_BOX(result->combo_marker), 0) ;
g_signal_connect (G_OBJECT (result->combo_marker), "changed",
G_CALLBACK (callback_option_tab_combo_marker_changed), NULL);

Other labels and text_entry in the same form are affected by this font-desc, but GtkComboBox is not.

Please help me.
Thanks!

openldev · **Posted:** Fri Nov 23, 2007 2:33 pm

I'm sorry ... I wasn't thinking when I answered your question. The modify_font() function only works if the text is rendered by the widget itself. However, the text in a combo box is managed in a GtkTreeModel (GtkListStore). You can retrieve this with gtk_combo_box_get_model(). Then, you can edit the font attributes of the corresponding GtkCellRendererText.

greenstream · **Joined:** Wed Nov 21, 2007 8:50 am **Posts:** 4

Thanks openldev,
But when I change cellrender of gtkcombobox, it occurs 2 columns of text.
Please see my code:
result->combo_marker = gtk_combo_box_new_text();

gtk_combo_box_append_text(GTK_COMBO_BOX(result->combo_marker), (const gchar*)"Square");
gtk_combo_box_append_text (GTK_COMBO_BOX(result->combo_marker), (const gchar*)"Rectangle");
gtk_combo_box_append_text (GTK_COMBO_BOX(result->combo_marker), (const gchar*)"X");
gtk_combo_box_append_text (GTK_COMBO_BOX(result->combo_marker), (const gchar*)"+");
g_object_set (G_OBJECT(cell_renderer), "font", FONT_DESC_LEVEL_3, NULL );

gtk_cell_layout_pack_start (GTK_CELL_LAYOUT(result->combo_marker), cell_renderer, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT(result->combo_marker), cell_renderer, "text", 0);

and the result:

Square Square

I don't know how to just display one column (normal size ComboBoxItem)?
Help me, please.
thank,

greenstream · **Joined:** Wed Nov 21, 2007 8:50 am **Posts:** 4

Ok . I was successful with it. Instead I use GtkListstore, I used GtkTreestore, and it worked.
This is my code:

Quote:

/* create combo box*/
ts = gtk_tree_store_new(1, G_TYPE_STRING);
cr = gtk_cell_renderer_text_new();
g_object_set (G_OBJECT(cr), "font", FONT_DESC_LEVEL_3, NULL );

gtk_tree_store_clear (ts);
gtk_tree_store_insert(ts, &iter, NULL, 0);
gtk_tree_store_set(ts, &iter, 0, "Just line", -1);
gtk_tree_store_insert(ts, &iter, NULL, 0);
gtk_tree_store_set(ts, &iter, 0, "Just marker", -1);
gtk_tree_store_insert(ts, &iter, NULL, 0);
gtk_tree_store_set(ts, &iter, 0, "Both", -1);

result->combo_render_style = gtk_combo_box_new_with_model(GTK_TREE_MODEL(ts));
gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(result->combo_render_style),cr,FALSE);
gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(result->combo_render_style),cr,"text",0,NULL);

Note that when I use the same code with GtkListstore rather than GtkTreestore, it show 2 columns of item text. I also don't know why.
If anyone has answer for this, it's appreciated.

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