[thg-dev] [PATCH 5 of 6] histdetails: desensitize up/down buttons

[Adrian Buehlmann]

# HG changeset patch
# User Adrian Buehlmann <adr...@cadifra.com>
# Date 1254607049 -7200
# Node ID 9dcecf4c897507fa4c77cf6af1ec5cf75f05ce54
# Parent  cc169e9c4b14b99cb1213e7e6ecf9558624ef273
histdetails: desensitize up/down buttons

diff --git a/tortoisehg/hgtk/histdetails.py b/tortoisehg/hgtk/histdetails.py
--- a/tortoisehg/hgtk/histdetails.py
+++ b/tortoisehg/hgtk/histdetails.py
@@ -91,11 +91,22 @@ class LogDetailsDialog(gtk.Dialog):
         rightvbox.pack_start(self.up_button, False, False, 2)
         rightvbox.pack_start(self.down_button, False, False, 4)
 
+        self.tv.connect('cursor-changed', lambda tv: self.update_buttons())
+
         self.show_all()
 
     def update_buttons(self):
         self._btn_apply.set_sensitive(self.dirty)
 
+        model, seliter = self.tv.get_selection().get_selected()
+
+        next = model.iter_next(seliter)
+        self.down_button.set_sensitive(next != None)
+
+        firstiter = model.get_iter_first()
+        islast = model.get_path(seliter) != model.get_path(firstiter)
+        self.up_button.set_sensitive(islast)
+
     def up_clicked(self, button):
         model, seliter = self.tv.get_selection().get_selected()
         i = model.get_iter_first()

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