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from gi.repository import Gtk
class SearchBar(Gtk.SearchBar):
"SearchBar implements Gtk.SearchBar on a Gtk.TextBuffer."
BG_COLOR = "yellow"
FG_COLOR = "black"
def __init__(self, view):
Gtk.SearchBar.__init__(self)
self.__view = view
self.__buffer = view.get_buffer()
self.__match = None
self.__tag = self.__buffer.create_tag("search-match",
background=self.BG_COLOR,
foreground=self.FG_COLOR)
hbox = Gtk.Box.new(Gtk.Orientation.HORIZONTAL, 0)
style_ctx = hbox.get_style_context()
style_ctx.add_class("linked")
style_ctx.add_class("raised")
self.add(hbox)
search_entry = Gtk.SearchEntry.new()
search_entry.set_width_chars(32)
search_entry.connect("search-changed", self.__search_changed)
search_entry.connect("next-match", self.__next_match)
search_entry.connect("previous-match", self.__prev_match)
hbox.pack_start(search_entry, True, True, 0)
self.__nextbtn, self.__prevbtn = self.__create_nav_buttons(search_entry, hbox)
self.set_show_close_button(True)
self.connect_entry(search_entry)
def __create_nav_buttons(self, search_entry, box):
def button_callback(button, dir):
signal = "previous-match" if dir == "up" else "next-match"
search_entry.emit(signal)
buttons = []
for dir in ["up", "down"]:
button = Gtk.Button.new_from_icon_name(F"go-{dir}-symbolic", Gtk.IconSize.MENU)
button.set_sensitive(False)
button.connect("clicked", button_callback, dir)
box.add(button)
buttons.append(button)
return tuple(buttons)
def __find_match(self, entry, start, forward=True):
buf = self.__buffer
text = entry.get_text()
# Remove old match.
buf.remove_tag(self.__tag,
buf.get_start_iter(),
buf.get_end_iter())
if forward:
self.__match = start.forward_search(text, 0, None)
else:
self.__match = start.backward_search(text, 0, None)
if self.__match:
mstart, mend = self.__match
buf.apply_tag(self.__tag, mstart, mend)
self.__view.scroll_to_iter(mstart, 0.1, False, 0.0, 0.0)
return self.__match
def __search_changed(self, entry):
found = self.__find_match(entry, self.__buffer.get_start_iter())
self.__nextbtn.set_sensitive(not found is None)
self.__prevbtn.set_sensitive(not found is None)
def __next_match(self, entry):
# Wrap around if no match was found previously.
if self.__match is None:
start = self.__buffer.get_start_iter()
else:
_, start = self.__match
self.__find_match(entry, start)
def __prev_match(self, entry):
# Wrap around if no match was found previously.
if self.__match is None:
start = self.__buffer.get_end_iter()
else:
start, _ = self.__match
self.__find_match(entry, start, forward=False)
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