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Make textviews scroll to the end when their 

size is changed
This commit is contained in:
Dimitur Kirov 2005-07-25 20:58:19 +00:00
parent a3cbad7ad7
commit 6eb31e283c
1 changed files with 34 additions and 9 deletions
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43
src/chat.py
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@ -344,13 +344,33 @@ class Chat:
del self.tagOut[jid]
del self.tagStatus[jid]
self.show_title()
def bring_scroll_to_end(self, textview, diff_y = 0):
''' scrolls to the end of textview if end is not visible '''
buffer = textview.get_buffer()
buffer.begin_user_action()
at_the_end = False
end_iter = buffer.get_end_iter()
end_rect = textview.get_iter_location(end_iter)
visible_rect = textview.get_visible_rect()
# scroll only if expected end is not visible
if end_rect.y >= (visible_rect.y + visible_rect.height + diff_y):
gobject.idle_add(self.scroll_to_end_iter, textview)
def scroll_to_end_iter(self, textview):
buffer = textview.get_buffer()
end_iter = buffer.get_end_iter()
textview.scroll_to_iter(end_iter, 0, False, 1, 1)
return False
def size_request(self, a, b, xml_top, message_scrolledwindow):
''' When message_textview changes its size. If the new height
will enlarge the window, enable the scrollbar automatic policy'''
message_textview = xml_top.get_widget('message_textview')
conversation_scrolledwindow = \
xml_top.get_widget('conversation_scrolledwindow')
conversation_textview = \
xml_top.get_widget('conversation_textview')
vpaned = xml_top.get_widget('vpaned')
if not vpaned.window:
return
@ -365,17 +385,22 @@ class Chat:
x3 = vpaned.window.get_size()[1]
x4 = banner_eventbox.size_request()[1]
x5 = actions_hbox.size_request()[1]
# difference between old height and new height
diff_y = message_textview.window.get_size()[1] - b.height
add_length = 22
if not self.compact_view_current_state:
add_length += x4 + x5
if x2 + x1 + add_length > x3:
message_scrolledwindow.set_property('vscrollbar-policy', gtk.POLICY_AUTOMATIC)
message_scrolledwindow.set_property('hscrollbar-policy', gtk.POLICY_AUTOMATIC)
message_scrolledwindow.set_property('height-request', x3 - x1 - add_length)
else:
message_scrolledwindow.set_property('vscrollbar-policy', gtk.POLICY_NEVER)
message_scrolledwindow.set_property('hscrollbar-policy', gtk.POLICY_NEVER)
message_scrolledwindow.set_property('height-request', -1)
if diff_y is not 0:
if x2 + x1 + add_length > x3:
message_scrolledwindow.set_property('vscrollbar-policy', gtk.POLICY_AUTOMATIC)
message_scrolledwindow.set_property('hscrollbar-policy', gtk.POLICY_AUTOMATIC)
message_scrolledwindow.set_property('height-request', x3 - x1 - add_length)
self.bring_scroll_to_end(message_textview)
else:
message_scrolledwindow.set_property('vscrollbar-policy', gtk.POLICY_NEVER)
message_scrolledwindow.set_property('hscrollbar-policy', gtk.POLICY_NEVER)
message_scrolledwindow.set_property('height-request', -1)
self.bring_scroll_to_end(conversation_textview, diff_y)
return True
def new_tab(self, jid):