update enabled status of undo/redo actions in the editor * file-editor-tab.h: new inline function returning the qscintilla edit area * octave-qscintilla.cc (constructor): connect textChanged signal to new private slot text_changed; (text_changed): new slot emitting a signal on undo/redo availability * octave-qscintilla.h: new slot and new signal * file-editor.cc (edit_status_update): new slot for updating undo/redo actions; (construct): undo/redo actions disabled at the beginning; (add_new_edit_tab): connect new slot to the signal from the qscintilla edit area indicating undo/redo availability * file-editor.h: new slot

Octave works best with gnuplot 4.4 or higher, which is available from
http://www.gnuplot.info.

In versions prior to 4.2.6 it is not possible to use the mouse to zoom in
on plots.  This is a limitation of earlier versions of gnuplot, which are
unable to zoom when the data it plots is not stored in a file. 


John W. Eaton
jwe@octave.org

Last updated: Tue Jan  4 18:55:56 PST 2011