Add mouse support.

Default (Linux).sublime-mousemap

@@ -0,0 +1,7 @@
+[
+	{
+		"button": "button2", "count": 1, "modifiers": ["ctrl", "alt"],
+		"press_command": "column_select",
+		"press_args": {"by": "mouse"}
+	}
+]

Default (OSX).sublime-mousemap

@@ -0,0 +1,7 @@
+[
+	{
+		"button": "button2", "count": 1, "modifiers": ["ctrl", "shift"],
+		"press_command": "column_select",
+		"press_args": {"by": "mouse"}
+	}
+]

Default (Windows).sublime-mousemap

@@ -0,0 +1,7 @@
+[
+	{
+		"button": "button2", "count": 1, "modifiers": ["ctrl", "alt"],
+		"press_command": "column_select",
+		"press_args": {"by": "mouse"}
+	}
+]

README.md

@@ -20,20 +20,27 @@ Windows:
 - Ctrl-Alt-Home: Up until the beginning of the document.
 - Ctrl-Alt-End: Down until the end of the document.
 
+- Ctrl-Alt-Right-click: Select current column in all lines from the cursor to the row where you clicked.
+
 Linux:
 
 - Alt-Shift-Up / Ctrl-Alt-Down: Up/down one line.
 - Alt-Shift-PageUp / Ctrl-Alt-PageDown: Up/down one page.
 - Alt-Shift-Home: Up until the beginning of the document.
 - Alt-Shift-End: Down until the end of the document.
 
+- Ctrl-Alt-Right-click: Select current column in all lines from the cursor to the row where you clicked.
+
 OS X:
 
 - Ctrl-Shift-Up / Ctrl-Alt-Down: Up/down one line.
 - Ctrl-Shift-PageUp / Ctrl-Alt-PageDown: Up/down one page.
 - Ctrl-Shift-Home: Up until the beginning of the document.
 - Ctrl-Shift-End: Down until the end of the document.
 
+- Ctrl-Shift-Right-click: Select current column in all lines from the cursor to the row where you clicked.
+
+
 If you want to use a different keystroke, go to "Preferences" then "Key Bindings - User", and add an entry like this:
 
 	{ "keys": ["ctrl+alt+up"], "command": "column_select", "args": {"by": "lines", "forward": false}},

column_select.py

@@ -1,6 +1,11 @@
 import sys
 import sublime, sublime_plugin
 
+# Notes:
+# - Would prefer that after going down, pressing up would undo the last down,
+#   not extend the selection from the top.  However, there's no simple way
+#   that I can think of to determine which direction the last move was.
+
 class ColumnSelect(sublime_plugin.TextCommand):
 
     def all_selections_at_end(self, sel):
@@ -14,7 +19,19 @@ def all_selections_at_end(self, sel):
                 break
         return at_end
 
-    def run(self, edit, by, forward):
+    def run_(self, args):
+        if 'event' in args:
+            event = args['event']
+            del args['event']
+        else:
+            event = None
+        edit = self.view.begin_edit(self.name(), args)
+        try:
+            self.run(edit=edit, event=event, **args)
+        finally:
+            self.view.end_edit(edit)
+
+    def run(self, edit=None, by='lines', forward=True, event=None):
         all_sel = self.view.sel()
 
         # Whether or not to ignore lines that are too short in the line count.
@@ -30,6 +47,30 @@ def run(self, edit, by, forward):
             ignore_too_short = False
         elif by == 'all':
             num_lines = sys.maxint
+        elif by == 'mouse':
+            orig_sel = [s for s in all_sel]
+            self.view.run_command('drag_select', {'event': event})
+            all_sel = self.view.sel()
+            click_point = all_sel[0].a
+            all_sel.clear()
+            map(all_sel.add, orig_sel)
+
+            if click_point < all_sel[0].begin():
+                forward = False
+                relative = all_sel[0].begin()
+            else:
+                forward = True
+                relative = all_sel[-1].end()
+            crow, ccol = self.view.rowcol(click_point)
+            rrow, rcol = self.view.rowcol(relative)
+
+            if forward:
+                if crow <= rrow: return
+                num_lines = crow - rrow
+            else:
+                if crow >= rrow: return
+                num_lines = rrow - crow
+            ignore_too_short = False
         else:
             sublime.error_message('Invalid "by" argument.')
             return