/usr/share/pyshared/freevo/gui/LayoutManagers.py is in python-freevo 1.9.2b2-4.2.
This file is owned by root:root, with mode 0o644.
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# -----------------------------------------------------------------------
# LayoutManagers.py - Different layout managers to manage the contents
# of a Container.
# -----------------------------------------------------------------------
# $Id: LayoutManagers.py 11905 2011-11-14 21:54:46Z adam $
#
# Notes:
# Todo:
#
# -----------------------------------------------------------------------
# Freevo - A Home Theater PC framework
# Copyright (C) 2003 Krister Lagerstrom, et al.
# Please see the file freevo/Docs/CREDITS for a complete list of authors.
#
# 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 MER-
# CHANTABILITY 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.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# -----------------------------------------------------------------------
import logging
logger = logging.getLogger("freevo.gui.LayoutManagers")
import config
from Border import *
from Scrollbar import *
from GUIObject import *
from Label import *
class LayoutManager:
def __init__(self, container):
pass
def layout(self):
pass
class FlowLayout(LayoutManager):
def __init__(self, container):
self.container = container
def get_next_child(self, j):
num_children = len(self.container.children)
if j < num_children - 1:
next = self.container.children[j+1]
if (isinstance(next, Border) \
or isinstance(next, Scrollbar) \
or not next.is_visible()) \
and j < num_children - 2:
next = self.get_next_child(j+1)
else:
next = None
else:
next = None
return next
def layout(self):
next_x = self.container.h_margin
next_y = self.container.v_margin
line_height = 0
row = 0
self.table = [[],]
num_children = len(self.container.children)
for i in range(num_children):
child = self.container.children[i]
if not child.is_visible():
continue
if isinstance(child, Border):
continue
if isinstance(child, Scrollbar):
continue
x = next_x
y = next_y
next = self.get_next_child(i)
if child.width == -1:
child.width = self.container.width - 2 * self.container.h_margin
if child.height == -1 and isinstance(child, Label):
if self.container.vertical_expansion:
child.height = config.CONF.height - 20
else:
child.height = self.container.height - \
self.container.v_margin - y
child.get_rendered_size()
end = x + child.width + self.container.h_margin
if end > self.container.width or \
(len(self.table[row]) and (child.h_align == Align.LEFT or \
child.h_align == Align.CENTER)):
row += 1
self.table.append([])
x = self.container.h_margin
y += line_height + self.container.v_spacing
line_height = 0
if child.height > line_height:
line_height = child.height
if y + child.height > self.container.height - self.container.v_margin:
if self.container.vertical_expansion:
self.container.height = y + child.height + self.container.v_margin
else:
break
next_x = x + child.width + self.container.h_spacing
next_y = y
child.set_position(x, y)
self.table[row].append(child)
if not self.table[-1]:
del(self.table[-1])
self.internal_align()
if hasattr(self.container, 'center_on_screen'):
self.container.top = (self.container.osd.height - self.container.height) / 2
def internal_align(self):
if not self.table: return
x_offset = 0
y_offset = 0
if len(self.table) == 1:
if len(self.table[0]) == 1:
# There is only one visible object inside the container.
child = self.table[0][0]
if child.h_align == Align.CENTER:
x_offset = self.container.width / 2 - \
(child.left + child.width / 2)
if child.left:
child.set_position(child.left + x_offset, child.top)
else:
child.set_position(x_offset, child.top)
_debug_(' moved right by %s' % x_offset, 2)
if child.h_align == Align.LEFT:
pass
if child.h_align == Align.RIGHT:
pass
if child.v_align == Align.CENTER:
y_offset = self.container.height / 2 - (child.top + child.height / 2)
if child.top:
child.set_position(child.left, child.top + y_offset)
else:
child.set_position(child.left, y_offset)
# If there is really just one visible child inside this
# container then we are done.
return
global_height = 0
for row in self.table:
if not len(row):
continue
row_width = 0
row_height = 0
for child in row:
row_width += child.width
row_height = max(row_height, child.height)
if len(row) - row.index(child) > 1:
row_width += self.container.h_spacing
global_height += row_height + self.container.v_spacing
if self.container.internal_h_align == Align.CENTER:
row_center = row[0].left + row_width / 2
x_offset = self.container.width / 2 - row_center
for child in row:
if child.left:
child.set_position(child.left + x_offset, child.top)
else:
child.set_position(x_offset, child.top)
elif len(row) == 1 and row[0].h_align == Align.CENTER:
x_offset = self.container.width / 2 - (row[0].left + row[0].width / 2)
if row[0].left:
row[0].set_position(child.left + x_offset, child.top)
else:
row[0].set_position(x_offset, child.top)
if len(self.table) > 1:
space = self.container.height - self.container.v_spacing - global_height
shift = space / (len(self.table) + 4)
if self.container.internal_v_align == Align.CENTER and shift > 0:
current = 2 * shift
for row in self.table:
for child in row:
if child.top:
child.set_position(child.left, child.top + current)
else:
child.set_position(child.left, current)
current += shift
self.needed_space = global_height
class GridLayout(LayoutManager):
def __init__(self):
pass
class BorderLayout(LayoutManager):
def __init__(self):
pass
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