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"""
Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion 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.
GNU Radio Companion 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
"""
import pygtk
pygtk.require('2.0')
import gtk
from Dialogs import TextDisplay
from Constants import MIN_DIALOG_WIDTH, MIN_DIALOG_HEIGHT
def get_title_label(title):
"""
Get a title label for the params window.
The title will be bold, underlined, and left justified.
@param title the text of the title
@return a gtk object
"""
label = gtk.Label()
label.set_markup('\n<b><span underline="low">%s</span>:</b>\n'%title)
hbox = gtk.HBox()
hbox.pack_start(label, False, False, padding=11)
return hbox
class PropsDialog(gtk.Dialog):
"""
A dialog to set block parameters, view errors, and view documentation.
"""
def __init__(self, block):
"""
Properties dialog contructor.
@param block a block instance
"""
self._hash = 0
LABEL_SPACING = 7
gtk.Dialog.__init__(self,
title='Properties: %s'%block.get_name(),
buttons=(gtk.STOCK_CANCEL, gtk.RESPONSE_REJECT, gtk.STOCK_OK, gtk.RESPONSE_ACCEPT),
)
self._block = block
self.set_size_request(MIN_DIALOG_WIDTH, MIN_DIALOG_HEIGHT)
vbox = gtk.VBox()
#Create the scrolled window to hold all the parameters
scrolled_window = gtk.ScrolledWindow()
scrolled_window.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
scrolled_window.add_with_viewport(vbox)
self.vbox.pack_start(scrolled_window, True)
#Params box for block parameters
self._params_box = gtk.VBox()
self._params_box.pack_start(get_title_label('Parameters'), False)
self._input_object_params = list()
#Error Messages for the block
self._error_box = gtk.VBox()
self._error_messages_text_display = TextDisplay()
self._error_box.pack_start(gtk.Label(), False, False, LABEL_SPACING)
self._error_box.pack_start(get_title_label('Error Messages'), False)
self._error_box.pack_start(self._error_messages_text_display, False)
#Docs for the block
self._docs_box = err_box = gtk.VBox()
self._docs_text_display = TextDisplay()
self._docs_box.pack_start(gtk.Label(), False, False, LABEL_SPACING)
self._docs_box.pack_start(get_title_label('Documentation'), False)
self._docs_box.pack_start(self._docs_text_display, False)
#Add the boxes
vbox.pack_start(self._params_box, False)
vbox.pack_start(self._error_box, False)
vbox.pack_start(self._docs_box, False)
#connect events
self.connect('key_press_event', self._handle_key_press)
self.connect('show', self._update_gui)
#show all (performs initial gui update)
self.show_all()
def _params_changed(self):
"""
Have the params in this dialog changed?
Ex: Added, removed, type change, hide change...
Make a hash that uniquely represents the params state.
@return true if changed
"""
old_hash = self._hash
self._hash = 0
for param in self._block.get_params():
self._hash ^= hash(param)
self._hash ^= hash(param.get_type())
self._hash ^= hash(param.get_hide())
return self._hash != old_hash
def _handle_changed(self, *args):
"""
A change occured within a param:
Rewrite/validate the block and update the gui.
"""
#update for the block
self._block.rewrite()
self._block.validate()
self._update_gui()
def _update_gui(self, *args):
"""
Repopulate the parameters box (if changed).
Update all the input parameters.
Update the error messages box.
Hide the box if there are no errors.
Update the documentation block.
Hide the box if there are no docs.
"""
#update the params box
if self._params_changed():
#hide params box before changing
self._params_box.hide_all()
#empty the params box
for io_param in list(self._input_object_params):
self._params_box.remove(io_param)
self._input_object_params.remove(io_param)
io_param.destroy()
#repopulate the params box
for param in self._block.get_params():
if param.get_hide() == 'all': continue
io_param = param.get_input(self._handle_changed)
self._input_object_params.append(io_param)
self._params_box.pack_start(io_param, False)
#show params box with new params
self._params_box.show_all()
#update the errors box
if self._block.is_valid(): self._error_box.hide()
else: self._error_box.show()
messages = '\n\n'.join(self._block.get_error_messages())
self._error_messages_text_display.set_text(messages)
#update the docs box
if self._block.get_doc(): self._docs_box.show()
else: self._docs_box.hide()
self._docs_text_display.set_text(self._block.get_doc())
def _handle_key_press(self, widget, event):
"""
Handle key presses from the keyboard.
Call the ok response when enter is pressed.
@return false to forward the keypress
"""
if event.keyval == gtk.keysyms.Return:
self.response(gtk.RESPONSE_ACCEPT)
return True #handled here
return False #forward the keypress
def run(self):
"""
Run the dialog and get its response.
@return true if the response was accept
"""
response = gtk.Dialog.run(self)
self.destroy()
return response == gtk.RESPONSE_ACCEPT
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