[meld] Fix MsgArea display on bad fg/bg tooltip colours (closes bgo#662500)

[Kai Willadsen <kaiw src gnome org>]

commit 076ffa5aa5874ddd4488aeb48ceb2be6f8a5987b
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Jan 1 14:06:40 2012 +1000

    Fix MsgArea display on bad fg/bg tooltip colours (closes bgo#662500)
    
    In situations where the tooltip foreground and background colours are
    set independently of the main text colour, the MsgArea popups could be
    unreadable, because gtk.Labels contained in a tooltip don't inherit
    its styling properly - or at least not in some engines. This affects
    the Ubuntu Ambience dark theme.

 meld/ui/msgarea.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/meld/ui/msgarea.py b/meld/ui/msgarea.py
index 31317fe..35281ea 100644
--- a/meld/ui/msgarea.py
+++ b/meld/ui/msgarea.py
@@ -39,6 +39,7 @@ class MsgArea(gtk.HBox):
         super(MsgArea, self).__init__(**kwargs)
 
         self.__contents = None
+        self.__labels = []
         self.__changing_style = False
 
         self.__main_hbox = gtk.HBox(False, 16) # FIXME: use style properties
@@ -109,6 +110,8 @@ class MsgArea(gtk.HBox):
 
         self.__changing_style = True
         self.set_style(style)
+        for label in self.__labels:
+            label.set_style(style)
         self.__changing_style = False
 
         window.destroy()
@@ -195,6 +198,8 @@ class MsgArea(gtk.HBox):
         vbox.show()
         hbox_content.pack_start (vbox, True, True, 0)
 
+        self.__labels = []
+
         primary_markup = "<b>%s</b>" % (primary_text,)
         primary_label = WrapLabel(primary_markup)
         primary_label.show()
@@ -204,6 +209,7 @@ class MsgArea(gtk.HBox):
         primary_label.set_alignment(0, 0.5)
         primary_label.set_flags(gtk.CAN_FOCUS)
         primary_label.set_selectable(True)
+        self.__labels.append(primary_label)
 
         if secondary_text:
             secondary_markup = "<small>%s</small>" % (secondary_text,)
@@ -215,6 +221,7 @@ class MsgArea(gtk.HBox):
             secondary_label.set_line_wrap(True)
             secondary_label.set_selectable(True)
             secondary_label.set_alignment(0, 0.5)
+            self.__labels.append(secondary_label)
 
         self.set_contents(hbox_content)