add menu entries and shortcuts for zoom functions in the editor (bug #41516) * file-editor.cc (zoom_in): slot for zoom-in action, triggering signal for tab; (zoom_out): slot for zoom-out action, triggering signal for tab; (zoom_normal): slot for zoom-to-normal action, triggering signal for tab; (construct): new View-menu with zoom-in, zoom-out and zoom-normal entries; (add_file_editor_tab): connect zoom-signal to newly created tabs; (set_shortcuts): set shortcuts for new zoom actions; (check_actions): disable zoom action when no editor tab is open * file-editor.h: zoom-in, zoom-out and zoom-normal actions, related slots and related signals to the actual tab * file-editor-tab.cc (zoom_in): new slot for signal from file_editor; (zoom_out): new slot for signal from file_editor; (zoom_normal): new slot for signal from file_editor * file-editor-tab.h: new slots zoom_in, zoom_out, zoom_normal * octave-qscintilla.cc (eventFilter): event filter for overriding qscintilla internal shortcuts; (constructor): install event filter * octave-qscintilla.h: event filter

--- a/libgui/src/m-editor/octave-qscintilla.cc	Thu Feb 13 12:15:14 2014 -0500
+++ b/libgui/src/m-editor/octave-qscintilla.cc	Thu Feb 13 20:39:09 2014 +0100
@@ -29,13 +29,16 @@
 #ifdef HAVE_QSCINTILLA
 
 #include <Qsci/qscilexer.h>
+#include <QShortcut>
 
 #include "octave-qscintilla.h"
 #include "file-editor-tab.h"
 
 octave_qscintilla::octave_qscintilla (QWidget *p)
   : QsciScintilla (p)
-{ }
+{
+  installEventFilter (this);
+}
 
 octave_qscintilla::~octave_qscintilla ()
 { }
@@ -186,4 +189,13 @@
     emit execute_command_in_terminal_signal (commands.at (i));
 }
 
+bool
+octave_qscintilla::eventFilter(QObject *obj, QEvent *e)
+ {
+  if (e->type() == QEvent::ShortcutOverride)
+    return true;
+  else
+    return QObject::eventFilter(obj, e);
+ }
+
 #endif