Re: can't set background color for Gtk::Entry

[Bob Caryl <bob fis-cal com>]

Yes, you missed something:  Check out:

http://www.gtkmm.org/gtkmm2/docs/reference/html/classPango_1_1Attribute.html

If one goes far enough down the rabbit hole, one eventually finds the missing piece of the puzzle, i.e.  Pango::Attribute::create_attr_background.

I am trying to accomplish your goal in my own code as follows:

<code>
Gtk::Entry *lookup_entry;
Pango::AttrList attrlist;
Glib::RefPtr<Pango::Layout> layout;
Pango::Attribute attr;

lookup_entry = new Gtk::Entry();
layout = lookup_entry->get_layout();
attrlist = layout.get_attributes();
attr = Pango::Attribute::create_attr_background(65535,0,0);
attrlist.change(attr);
layout.set_attributes(attrlist);
</code>

According to the docs, the foregoing code should work.  However, I am running into a compiler error which reads:

'get_attributes' undeclared (first use this function)

I get another message for 'set_attributes', even though when I peruse <pangomm/layout.h> both of these functions are prototyped for the 'Pango::Layout' class.  Maybe Murray can wade in at this point and rescue both of us?


On Tue, 2005-02-15 at 09:08, Akos Maroy wrote:
> Bob Caryl wrote:
> > Your code doesn't work because you are not modifying the object that
> > actually renders the editable cell within the entry.  You need to
> > retrieve the Pango layout for the entry and modify the background color
> > attribute of the layout.  The following URL is a good place to start
> > delving into this:
> > 
> > http://www.gtkmm.org/gtkmm2/docs/reference/html/classPango_1_1Layout.html
> > 
> > Hope this helps a little.
>
> I did look at the Pango layout, but the word 'color' does not appear on 
> that page anywhere. I also looked at the AttrList, Context, etc. 
> structures referenced on this page, but they don't contain any 
> color-related information either.
>
> am I missing something?

Robert L. Caryl Jr.
Fiscal Systems Inc.

102 Commerce Circle

Madison  AL 35758



256.772.8920 ext. 108 -- Office

256.527.7855 -- Cell



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