editing the display in gcalctool

[Venkatesan <svenkatesan novell com>]

Hi,

Presently, the gcalctool display is not editable directly. Each
character entry is monitored and corresponding action is taken by
altering an internal expression string. This is to prevent entering
illegal characters like alphabets etc.. but the downside is that
insertion and deletion at arbitrary positions in the text view by using
arrow keys and then deleting/inserting is not possible.. for eg, the
backspace key always deletes the last character regardless of the
position of cursor.. i think this needs to be changed... I think we can
allow the text in display to be altered freely as the expression
evaluation can catch any illegal characters... this will enable the
correction of the entered expression much more easily..

please see http://bugzilla.gnome.org/show_bug.cgi?id=163538 

i am planning to work on this...

any ideas/suggestions????