ddc@`s^dZddlmZmZmZmZddlTddlZejdddl Z ddl Z ddl Z ddl m Zddl mZdd l mZd d l mZd d l mZd d l mZd dl mZdddgZde jfdYZdefdYZdefdYZe j ee j ee j edS(uyGTK text entries (fields) with enhanced features. Enhanced features include undo/redo history and a customizable popup. i(tabsolute_importtdivisiontprint_functiontunicode_literals(t*Nu2.0i(t fileformats(tpath(tutilsi(tcell_renderers(tentry_expander(t entry_popup(tentry_undo_contextu ExtendedEntryuFilenamePatternEntryuFileExtensionEntryt ExtendedEntrycB`seZdZdZedZedZdZedZ dZ dZ dZ d Z d Zd Zd Zd ZRS(u This class is a subclass of `gtk.Entry` with additional capabilities: * undo/redo of text, * placeholder text, * expandable width of the entry. Attributes: * `undo_context` (read-only) - `EntryUndoContext` instance to handle undo/redo actions. * `placeholder_text` (read-only) - Placeholder text displayed if the entry is empty or matches the placeholder text. 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""" from __future__ import absolute_import, division, print_function, unicode_literals from future.builtins import * import pango __all__ = [ 'EntryExpander', ] class EntryExpander(object): """ This class enables the specified `gtk.Entry` to have a flexible width, bounded by the specified minimum and maximum number of characters (width in characters). """ def __init__(self, entry, minimum_width_chars, maximum_width_chars): self._entry = entry self._minimum_width_chars = minimum_width_chars self._maximum_width_chars = maximum_width_chars if self._minimum_width_chars > self._maximum_width_chars: raise ValueError( 'minimum width in characters ({0}) cannot be greater than maximum ({1})'.format( self._minimum_width_chars, self._maximum_width_chars)) self._minimum_width = -1 self._maximum_width = -1 self._entry.set_width_chars(self._minimum_width_chars) self._pango_layout = pango.Layout(self._entry.get_pango_context()) self._entry.connect('changed', self._on_entry_changed) self._entry.connect('size-allocate', self._on_entry_size_allocate) def _on_entry_changed(self, entry): if self._entry.get_realized(): self._update_entry_width() def _on_entry_size_allocate(self, entry, allocation): if self._minimum_width == -1: self._minimum_width = self._entry.get_allocation().width self._maximum_width = ( int((self._minimum_width / self._minimum_width_chars) * self._maximum_width_chars) + 1) self._update_entry_width() def _update_entry_width(self): self._pango_layout.set_text(self._entry.get_text()) offset_pixel_width = ( (self._entry.get_layout_offsets()[0] + self._entry.get_property('scroll-offset')) * 2) text_pixel_width = self._pango_layout.get_pixel_size()[0] + offset_pixel_width self._entry.set_property( 'width-request', max(min(text_pixel_width, self._maximum_width), self._minimum_width))