/usr/share/pyshared/tegakigtk/chartable.py is in python-tegaki-gtk 0.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2009 The Tegaki project contributors
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# Contributors to this file:
# - Mathieu Blondel
import gtk
from gtk import gdk
import gobject
import pango
import math
import time
from tegaki.character import *
class CharTable(gtk.Widget):
"""
A nifty character table.
A port of Takuro Ashie's TomoeCharTable to pygtk.
"""
LAYOUT_SINGLE_HORIZONTAL = 0
LAYOUT_SINGLE_VERTICAL = 1
LAYOUT_HORIZONTAL = 2
LAYOUT_VERTICAL = 3
DEFAULT_FONT_SCALE = 2.0 #pango.SCALE_XX_LARGE
__gsignals__ = {
"character_selected" : (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
[gobject.TYPE_PYOBJECT])
}
def __init__(self):
gtk.Widget.__init__(self)
self._pixmap = None
self._padding = 2
self._selected = None
self._prelighted = None
self._layout = self.LAYOUT_SINGLE_HORIZONTAL
self._h_adj = None
self._v_adj = None
self.clear()
self.connect("motion_notify_event", self.motion_notify_event)
# Events...
def do_realize(self):
"""
Called when the widget should create all of its
windowing resources. We will create our gtk.gdk.Window.
"""
# Set an internal flag telling that we're realized
self.set_flags(self.flags() | gtk.REALIZED)
# Create a new gdk.Window which we can draw on.
# Also say that we want to receive exposure events
# and button click and button press events
self.window = gdk.Window(self.get_parent_window(),
x=self.allocation.x,
y=self.allocation.y,
width=self.allocation.width,
height=self.allocation.height,
window_type=gdk.WINDOW_CHILD,
wclass=gdk.INPUT_OUTPUT,
visual=self.get_visual(),
colormap=self.get_colormap(),
event_mask=gdk.EXPOSURE_MASK |
gdk.BUTTON_PRESS_MASK |
gdk.BUTTON_RELEASE_MASK |
gdk.POINTER_MOTION_MASK |
gdk.POINTER_MOTION_HINT_MASK |
gdk.ENTER_NOTIFY_MASK |
gdk.LEAVE_NOTIFY_MASK)
# Associate the gdk.Window with ourselves, Gtk+ needs a reference
# between the widget and the gdk window
self.window.set_user_data(self)
# Attach the style to the gdk.Window, a style contains colors and
# GC contextes used for drawing
self.style.attach(self.window)
# The default color of the background should be what
# the style (theme engine) tells us.
self.style.set_background(self.window, gtk.STATE_NORMAL)
self.window.move_resize(*self.allocation)
# Font
font_desc = self.style.font_desc.copy()
size = font_desc.get_size()
font_desc.set_size(int(size * self.DEFAULT_FONT_SCALE))
self.modify_font(font_desc)
def do_unrealize(self):
"""
The do_unrealized method is responsible for freeing the GDK resources
De-associate the window we created in do_realize with ourselves
"""
self.window.destroy()
def do_size_request(self, requisition):
"""
The do_size_request method Gtk+ is called on a widget to ask it the
widget how large it wishes to be.
It's not guaranteed that gtk+ will actually give this size to the
widget.
"""
self.ensure_style()
context = self.get_pango_context()
metrics = context.get_metrics(self.style.font_desc,
context.get_language())
# width
char_width = metrics.get_approximate_char_width()
digit_width = metrics.get_approximate_digit_width()
char_pixels = pango.PIXELS(int(max(char_width, digit_width) *
self.DEFAULT_FONT_SCALE))
requisition.width = char_pixels + self._padding * 2
# height
ascent = metrics.get_ascent()
descent = metrics.get_descent()
requisition.height = pango.PIXELS(ascent + descent) + self._padding * 2
def do_size_allocate(self, allocation):
"""
The do_size_allocate is called when the actual
size is known and the widget is told how much space
could actually be allocated."""
self.allocation = allocation
self.width = self.allocation.width
self.height = self.allocation.height
if self.flags() & gtk.REALIZED:
self.window.move_resize(*allocation)
self._pixmap = gdk.Pixmap(self.window,
self.width,
self.height)
self.draw()
def do_expose_event(self, event):
"""
This is where the widget must draw itself.
"""
retval = False
if self.flags() & gtk.REALIZED and not self._pixmap:
self._pixmap = gdk.Pixmap(self.window,
self.allocation.width,
self.allocation.height)
self._adjust_adjustments()
self.draw()
if self._pixmap:
self.window.draw_drawable(self.style.fg_gc[self.state],
self._pixmap,
event.area.x, event.area.y,
event.area.x, event.area.y,
event.area.width, event.area.height)
return retval
def motion_notify_event(self, widget, event):
retval = False
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x = event.x
y = event.y
state = event.state
prev_prelighted = self._prelighted
self._prelighted = self._get_char_id_from_coordinates(x, y)
if prev_prelighted != self._prelighted:
self.draw()
return retval
def do_button_press_event(self, event):
retval = False
prev_selected = self._selected
self._selected = self._get_char_id_from_coordinates(event.x, event.y)
if prev_selected != self._selected:
self.draw()
if self._selected >= 0:
self.emit("character_selected", event)
return retval
def do_button_release_event(self, event):
return False
def get_max_char_size(self):
context = self.get_pango_context()
metrics = context.get_metrics(self.style.font_desc,
context.get_language())
# width
char_width = metrics.get_approximate_char_width()
digit_width = metrics.get_approximate_digit_width()
max_char_width = pango.PIXELS(int(max(char_width, digit_width) *
self.DEFAULT_FONT_SCALE))
# height
ascent = metrics.get_ascent()
descent = metrics.get_descent()
max_char_height = pango.PIXELS(int((ascent + descent) *
self.DEFAULT_FONT_SCALE))
return (max_char_width, max_char_height)
def _get_char_frame_size(self):
sizes = [layout.get_pixel_size() for layout in self._layouts]
if len(sizes) > 0:
inner_width = max([size[0] for size in sizes])
inner_height = max([size[1] for size in sizes])
else:
inner_width, inner_height = self.get_max_char_size()
outer_width = inner_width + 2 * self._padding
outer_height = inner_height + 2 * self._padding
return [inner_width, inner_height, outer_width, outer_height]
def _get_char_id_from_coordinates(self, x, y):
inner_width, inner_height, outer_width, outer_height = \
self._get_char_frame_size()
h_offset = 0; v_offset = 0
if self._h_adj: h_offset = h_adj.get_value()
if self._v_adj: v_offset = v_adj.get_value()
# Calculate columns for horizontal layout
cols = self.allocation.width / outer_width
if cols <= 0: cols = 1
# Calculate rows for vertical layout
rows = self.allocation.height / outer_height
if rows <= 0: rows = 1
for i in range(len(self._layouts)):
if self._layout == self.LAYOUT_SINGLE_HORIZONTAL:
area_x = outer_width * i - h_offset
if x >= area_x and x < area_x + outer_width:
return i
elif self._layout == self.LAYOUT_SINGLE_VERTICAL:
area_y = outer_height * i - v_offset
if y >= area_y and y < area_y + outer_height:
return i
elif self._layout == self.LAYOUT_HORIZONTAL:
area_x = outer_width * (i % cols) - h_offset
area_y = outer_height * (i / cols) - v_offset
if x >= area_x and x < area_x + outer_width and \
y >= area_y and y < area_y + outer_height:
return i
elif self._layout == self.LAYOUT_VERTICAL:
area_x = outer_width * (i / rows) - h_offset
area_y = outer_height * (i % rows) - v_offset
if x >= area_x and x < area_x + outer_width and \
y >= area_y and y < area_y + outer_height:
return i
return None
def _adjust_adjustments(self):
pass
def draw(self):
if not self._pixmap:
return
inner_width, inner_height, outer_width, outer_height = \
self._get_char_frame_size()
y_pos = (self.allocation.height - inner_height) / 2
x_pos = (self.allocation.width - inner_width) / 2
cols = self.allocation.width / outer_width
if cols <= 0: cols = 1
rows = self.allocation.height / outer_height
if rows <= 0: rows = 1
h_offset = 0; v_offset = 0
if self._h_adj: h_offset = h_adj.get_value()
if self._v_adj: v_offset = v_adj.get_value()
# Fill background
self._pixmap.draw_rectangle(self.style.white_gc,
True,
0, 0,
self.allocation.width,
self.allocation.height)
# Draw characters
for i in range(len(self._layouts)):
layout = self._layouts[i]
selected = i == self._selected
char_width, char_height = layout.get_pixel_size()
if self._layout == self.LAYOUT_SINGLE_HORIZONTAL:
outer_x = outer_width * i - h_offset
outer_y = 0
outer_height = self.allocation.height
inner_x = outer_x + (outer_width - char_width) / 2
inner_y = y_pos
if outer_x + outer_width < 0:
continue
if outer_x + outer_width > self.allocation.width:
break
elif self._layout == self.LAYOUT_SINGLE_VERTICAL:
outer_x = 0
outer_y = outer_height * i - v_offset
outer_width = self.allocation.width
inner_x = x_pos
inner_y = outer_y + (outer_height - char_height) / 2
if outer_y + outer_height < 0:
continue
if outer_y + outer_height > self.allocation.height:
break
elif self._layout == self.LAYOUT_HORIZONTAL:
outer_x = outer_width * (i % cols) - h_offset
outer_y = outer_height * (i / cols) - v_offset
inner_x = outer_x + (outer_width - char_width) / 2
inner_y = outer_y + (outer_height - char_height) / 2
if outer_y + outer_height < 0:
continue
if outer_y + outer_height > self.allocation.height:
break
elif self._layout == self.LAYOUT_VERTICAL:
outer_x = outer_width * (i / rows) - h_offset
outer_y = outer_height * (i % rows) - v_offset
inner_x = outer_x + (outer_width - char_width) / 2
inner_y = outer_y + (outer_height - char_height) / 2
if outer_x + outer_width < 0:
continue
if outer_x + outer_width > self.allocation.width:
break
if selected:
outer_gc = self.style.bg_gc[gtk.STATE_SELECTED]
inner_gc = self.style.white_gc
else:
outer_gc = self.style.white_gc
inner_gc = self.style.black_gc
self._pixmap.draw_rectangle(outer_gc,
True,
outer_x, outer_y,
outer_width, outer_height)
self._pixmap.draw_layout(inner_gc,
inner_x, inner_y,
layout)
if i == self._prelighted:
# FIXME: doesn't seem to work
self.style.paint_shadow(self.window,
gtk.STATE_PRELIGHT, gtk.SHADOW_OUT,
None, None, None,
outer_x, outer_y,
outer_width, outer_height)
self.window.draw_drawable(self.style.fg_gc[self.state],
self._pixmap,
0, 0,
0, 0,
self.allocation.width, self.allocation.height)
def set_characters(self, characters):
self._layouts = []
for character in characters:
self._layouts.append(self.create_pango_layout(character))
self.draw()
self._characters = characters
def get_characters(self):
return self._characters
def get_selected(self):
return self._selected
def unselect(self):
self._selected = None
self.draw()
def clear(self):
self._selected = None
self._prelighted = None
self.set_characters([])
def set_layout(self, layout):
self._layout = layout
gobject.type_register(CharTable)
if __name__ == "__main__":
import sys
window = gtk.Window()
chartable = CharTable()
chartable.set_characters(["あ", "い","う", "え", "お",
"か", "き", "く", "け", "こ",
"さ", "し", "す", "せ", "そ"])
try:
layout = int(sys.argv[1])
if layout > 3: layout = 0
except IndexError:
layout = 0
chartable.set_layout(layout)
def on_selected(widget, event):
print "char_selected", chartable.get_selected()
print "ev button", event.button
print "ev time", event.time
chartable.connect("character-selected", on_selected)
window.add(chartable)
window.show_all()
gtk.main()
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