#@+leo-ver=4-thin
#@+node:EKR.20040517080517.1:@thin arrows.py
"""Rebind up/down arrow keys"""

#@@language python
#@@tabwidth -4

import leoGlobals as g
import leoPlugins

try: import Tkinter as Tk
except ImportError: Tk = None

#@+others
#@+node:EKR.20040517080517.2:onOpen
# Warning: the bindings created this way conflict with shift-arrow keys.

def onOpen (tag,keywords):

    c = keywords.get("new_c")
    body = c.frame.body
    tree = c.frame.tree

    # Add "hard" bindings to have up/down arrows move by visual lines.
    old_binding = body.bodyCtrl.bind("<Up>")
    if len(old_binding) == 0:
        body.bodyCtrl.bind("<Up>",tree.OnUpKey)

    old_binding = body.bodyCtrl.bind("<Down>")
    if len(old_binding) == 0:
        body.bodyCtrl.bind("<Down>",tree.OnDownKey)
#@-node:EKR.20040517080517.2:onOpen
#@-others

if Tk and not g.app.unitTesting: # Register the handlers...

    if g.app.gui is None:
        g.app.createTkGui(__file__)

    if g.app.gui.guiName() == "tkinter":

        leoPlugins.registerHandler("open2", onOpen)
    
        __version__ = "1.3"
        g.plugin_signon(__name__)
#@nonl
#@-node:EKR.20040517080517.1:@thin arrows.py
#@-leo