gaupol/renderers/float.py¶
Source code for module gaupol.renderers.float from file gaupol/renderers/float.py.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | # -*- coding: utf-8 -*-
# Copyright (C) 2009 Osmo Salomaa
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Cell renderer for float data with fixed precision."""
import aeidon
from gi.repository import GLib
from gi.repository import GObject
from gi.repository import Gtk
__all__ = ("FloatCellRenderer",)
class FloatCellRenderer(Gtk.CellRendererText):
"""Cell renderer for float data with fixed precision."""
__gtype_name__ = "FloatCellRenderer"
def __init__(self, format="{:.3f}"):
"""Initialize a :class:`FloatCellRenderer` instance."""
GObject.GObject.__init__(self)
self._format = format
aeidon.util.connect(self, self, "notify::text")
aeidon.util.connect(self, self, "editing-started")
def _on_editing_started(self, renderer, editor, path):
"""Set `editor` to use same font as `self`."""
editor.modify_font(self.props.font_desc)
def _on_notify_text(self, *args):
"""Cut decimals to fixed precision."""
# Since GTK+ 3.6, the notify::text signal seems to get
# emitted insanely often even if text hasn't changed at
# all. Let's try to keep this callback as fast as possible.
self.props.markup = self._text_to_markup(self.props.text)
@aeidon.deco.memoize(1000)
def _text_to_markup(self, text):
"""Return `text` renderer as markup for display."""
if not text: return ""
has_comma = text.find(",") > 0
if has_comma:
text = text.replace(",", ".")
text = self._format.format(float(text))
if has_comma:
text = text.replace(".", ",")
return GLib.markup_escape_text(text)
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