diff options
Diffstat (limited to 'Lib/idlelib/EditorWindow.py')
| -rw-r--r-- | Lib/idlelib/EditorWindow.py | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Lib/idlelib/EditorWindow.py b/Lib/idlelib/EditorWindow.py index b9522fc3e1..fcb1612f1f 100644 --- a/Lib/idlelib/EditorWindow.py +++ b/Lib/idlelib/EditorWindow.py @@ -132,6 +132,8 @@ class EditorWindow: text.bind("<<untabify-region>>",self.untabify_region_event) text.bind("<<toggle-tabs>>",self.toggle_tabs_event) text.bind("<<change-indentwidth>>",self.change_indentwidth_event) + text.bind("<Left>", self.move_at_edge_if_selection(0)) + text.bind("<Right>", self.move_at_edge_if_selection(1)) if flist: flist.inversedict[self] = key @@ -344,6 +346,26 @@ class EditorWindow: self.text.tag_remove("sel", "1.0", "end") self.text.see("insert") + def move_at_edge_if_selection(self, edge_index): + """Cursor move begins at start or end of selection + + When a left/right cursor key is pressed create and return to Tkinter a + function which causes a cursor move from the associated edge of the + selection. + + """ + self_text_index = self.text.index + self_text_mark_set = self.text.mark_set + edges_table = ("sel.first+1c", "sel.last-1c") + def move_at_edge(event): + if (event.state & 5) == 0: # no shift(==1) or control(==4) pressed + try: + self_text_index("sel.first") + self_text_mark_set("insert", edges_table[edge_index]) + except TclError: + pass + return move_at_edge + def find_event(self, event): SearchDialog.find(self.text) return "break" |