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"""
This file defines the DataVizManager that controls a list of
ModuleManagers.
This code is distributed under the conditions of the BSD license. See
LICENSE.txt for details.
Copyright (c) 2001-2002, Prabhu Ramachandran.
"""
__author__ = "Prabhu Ramachandran <prabhu_r@users.sf.net>"
__version__ = "$Revision: 1.6 $"
__date__ = "$Date: 2004/07/06 04:29:30 $"
import ModuleManager, Common, Tkinter
debug = Common.debug
class DataVizManager:
""" This class controls a list of ModuleManagers."""
def __init__ (self, data_src, renwin=None):
""" The argument 'data_src' refers to a data source instance
and 'renwin' to a RenderWindow instance."""
debug ("In DataVizManager::__init__ ()")
self.data_src = data_src
self.renwin=renwin
self.mod_mgr = {}
self.mm_name = []
self.cur_mm_name = ""
self.n_mm = 0
# The GUI list box
self.mm_lst = None
self.frame = None
def __del__ (self):
debug ("In DataVizManager::__del__ ()")
def clear (self):
"""This is needed to prevent self-referential loops and is
usually called before a DataVizManager object is destroyed."""
debug ("In DataVizManager::clear ()")
if self.frame:
self.close_gui ()
for mm_name in self.mm_name[:]:
self.del_module_mgr (mm_name)
del self.data_src
def config_changed (self):
debug ("In DataVizManager::config_changed ()")
for mm in self.mod_mgr.values ():
mm.config_changed ()
def get_data_source (self):
debug ("In DataVizManager::get_data_source ()")
return self.data_src
def get_render_window (self):
debug ("In DataVizManager::get_render_window ()")
return self.renwin
def get_current_module_mgr (self):
debug ("In DataVizManager::get_current_module_mgr ()")
if self.cur_mm_name:
return self.mod_mgr[self.cur_mm_name]
else:
return None
def add_module_mgr (self, mm):
debug ("In DataVizManager::add_module_mgr ()")
self.n_mm = self.n_mm + 1
k = '%d. %s'%(self.n_mm, mm.__class__.__name__)
self.mod_mgr[k] = mm
self.cur_mm_name = k
self.mm_name.append (k)
def del_module_mgr (self, key):
debug ("In DataVizManager::del_module_mgr ()")
try:
self.mod_mgr[key].clear ()
del self.mod_mgr[key]
except KeyError:
msg = "Error: cannot delete ModuleManager with key: %s"%key
raise KeyError, msg
indx = self.mm_name.index (key)
if len (self.mm_name) > 1:
if indx == 0:
self.cur_mm_name = self.mm_name[indx + 1]
else:
self.cur_mm_name = self.mm_name[indx - 1]
else:
self.cur_mm_name = ""
del self.mm_name[indx]
def _write_msg (self, file, msg):
file.write (msg)
debug (msg)
def save_current_module_mgr (self, file):
debug ("In DataVizManager::save_current_module_mgr ()")
self._write_msg (file, "### ModuleManagers ###\n")
file.write ("1\n")
self._write_msg (file, "### %s ###\n"%self.cur_mm_name)
mm = self.mod_mgr[self.cur_mm_name]
mm.save_config (file)
self._write_msg (file, "### End of %s ###\n"%self.cur_mm_name)
self._write_msg (file, "### End of ModuleManagers ###\n")
def save_config (self, file):
debug ("In DataVizManager::save_config ()")
self._write_msg (file, "### ModuleManagers ###\n")
file.write ("%d\n"%len (self.mm_name))
for mm_name in self.mm_name:
self._write_msg (file, "### %s ###\n"%mm_name)
mm = self.mod_mgr[mm_name]
mm.save_config (file)
self._write_msg (file, "### End of %s ###\n"%mm_name)
self._write_msg (file, "### End of ModuleManagers ###\n")
def _read_msg (self, file):
debug (file.readline ())
def load_current_module_mgr (self, file):
debug ("In DataVizManager::load_current_module_mgr ()")
# Get the config from the file
#self._read_msg (file)
tmp = file.readline ()
debug (tmp)
if tmp != "### ModuleManagers ###\n":
msg = "Error: Expected data for ModuleManagers not found.\n"\
"You have possibly chosen the wrong file.\n"
raise ParseException, msg
n = int (file.readline ())
# Read the first module manager to the current one.
self._read_msg (file)
mm = self.mod_mgr[self.cur_mm_name]
mm.load_config (file)
self._read_msg (file)
# Read the rest separately.
for i in range (1, n):
self._read_msg (file)
self.add_module_mgr_gui ()
self.mod_mgr[self.cur_mm_name].load_config (file)
self._read_msg (file)
self._read_msg (file)
def load_config (self, file):
debug ("In DataVizManager::load_config ()")
# Get the config from the file
tmp = file.readline ()
debug (tmp)
if tmp != "### ModuleManagers ###\n":
msg = "Error: Expected data for ModuleManagers not found. "\
"You have possibly chosen the wrong file."
raise ParseException, msg
n = int (file.readline ())
for i in range (n):
self._read_msg (file)
self.add_module_mgr_gui ()
self.mod_mgr[self.cur_mm_name].load_config (file)
self._read_msg (file)
self._read_msg (file)
def create_module_gui (self, master):
debug ("In DataVizManager::create_module_gui ()")
frame = Tkinter.Frame (master)
frame.pack (side='top', fill='y')
#label = Tkinter.Label (frame, text="Module Managers")
#label.grid (row=0, column=0, sticky='ew', columnspan=2)
scr = Tkinter.Scrollbar (frame, orient='vertical')
self.mm_lst = Tkinter.Listbox (frame, yscrollcommand=scr.set,
selectmode='single', height=3,
exportselection=0)
scr.config (command=self.mm_lst.yview)
self.mm_lst.grid (row=0, column=0, sticky='ewns')
scr.grid (row=0, column=1, sticky='ns')
self.mm_lst.bind ("<Double-Button-1>", self.show_mm)
but_f = Tkinter.Frame (master)
but_f.pack (side='top', fill='y')
but1 = Tkinter.Button (but_f, text="Show",
command=self.show_mm)
but1.grid (row=0, column=0, sticky="ew")
but2 = Tkinter.Button (but_f, text="New",
command=self.add_module_mgr_gui)
but2.grid (row=0, column=1, sticky="ew")
but3 = Tkinter.Button (but_f, text="Delete",
command=self.del_module_mgr_gui)
but3.grid (row=0, column=2, sticky="ew")
lab = "ModuleManager: %s"%self.cur_mm_name
self.data_label = Tkinter.Label (but_f, text=lab)
self.data_label.grid (row=1, column=0, columnspan=3, pady=0)
for mm in self.mm_name:
self.mm_lst.insert ('end', mm)
if self.cur_mm_name:
self.mm_lst.select_clear (0, 'end')
indx = self.mm_name.index (self.cur_mm_name)
self.mm_lst.activate (indx)
self.mm_lst.select_set (indx)
if self.cur_mm_name:
self.mm_lst.activate (self.mm_name.index (self.cur_mm_name))
self.cur_mm_name = ""
self.show_mm ()
def create_gui (self, master):
debug ("In DataVizManager::create_gui ()")
if not master:
debug ("In DataVizManager::create_gui: Error: No master widget.")
return None
self.frame = Tkinter.Frame (master, relief='ridge', bd=2)
self.frame.pack (side='top', fill='y', expand=1)
self.create_module_gui (self.frame)
def close_gui (self, event=None):
debug ("In DataVizManager::close_gui ()")
self.frame.destroy ()
def show_mm (self, event=None):
debug ("In DataVizManager::show_mm ()")
mm_name = self.mm_lst.get ('active')
if not mm_name:
return
if (self.cur_mm_name != mm_name) or (not self.cur_mm_name) :
if self.cur_mm_name:
old_mm = self.mod_mgr[self.cur_mm_name]
old_mm.close_gui ()
self.cur_mm_name = mm_name
self.update_label ()
mm = self.mod_mgr[self.cur_mm_name]
mm.create_gui (self.frame)
def update_label (self):
debug ("In DataVizManager::update_label ()")
lab = "ModuleManager: %s"%self.cur_mm_name
self.data_label.config (text=lab)
def del_module_mgr_gui (self, event=None):
debug ("In DataVizManager::del_module_mgr_gui ()")
key = self.mm_lst.get ('active')
self.mm_lst.delete ('active')
if key:
if self.cur_mm_name:
old_mm = self.mod_mgr[self.cur_mm_name]
old_mm.close_gui ()
self.del_module_mgr (key)
if self.cur_mm_name:
indx = self.mm_name.index (self.cur_mm_name)
self.mm_lst.select_clear (0, 'end')
self.mm_lst.activate (indx)
self.mm_lst.select_set (indx)
self.cur_mm_name = ""
self.show_mm ()
self.update_label ()
def add_module_mgr_gui (self, event=None):
debug ("In DataVizManager::add_module_mgr_gui ()")
if self.cur_mm_name:
old_mm = self.mod_mgr[self.cur_mm_name]
old_mm.close_gui ()
mm = ModuleManager.ModuleManager (self)
self.add_module_mgr (mm)
self.mm_lst.insert ('end', self.cur_mm_name)
self.mm_lst.select_clear (0, 'end')
self.mm_lst.activate ('end')
self.mm_lst.select_set ('end')
self.cur_mm_name = ""
self.show_mm ()
def config_lut (self):
debug ("In DataVizManager::config_lut ()")
self.lut_h.configure (self.frame)
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