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"""
Copyright 2007 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 ParamsDialog(gtk.Dialog):
"""A dialog box to set block parameters."""
def __init__(self, block):
"""
SignalBlockParamsDialog contructor.
@param block the signal block
"""
gtk.Dialog.__init__(self, buttons=('gtk-close', gtk.RESPONSE_CLOSE))
self.block = block
self.set_title('Properties: %s'%block.get_name())
self.set_size_request(MIN_DIALOG_WIDTH, MIN_DIALOG_HEIGHT)
vbox = gtk.VBox()
#Add the title label
vbox.pack_start(get_title_label('Parameters'), False)
#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)
#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, 7) #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, 7) #spacing
self._docs_box.pack_start(get_title_label('Documentation'), False)
self._docs_box.pack_start(self._docs_text_display, False)
#Add all the parameters
for param in self.block.get_params():
vbox.pack_start(param.get_input_object(self._handle_changed), False)
#Add the error and docs box
vbox.pack_start(self._error_box, False)
vbox.pack_start(self._docs_box, False)
#connect and show
self.connect('key_press_event', self._handle_key_press)
self.show_all()
#initial update
for param in self.block.get_params(): param.update()
self._update()
def _update(self):
"""
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 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
"""
keyname = gtk.gdk.keyval_name(event.keyval)
if keyname == 'Return': self.response(gtk.RESPONSE_OK)
return False #forward the keypress
def _handle_changed(self, param):
"""
A change occured, update any dependent parameters:
The enum inside the variable type may have changed and,
the variable param will need an external update.
@param param the graphical parameter that initiated the callback
"""
#update dependent params
if param.is_enum():
for other_param in param.get_parent().get_params():
if param.get_key() is not other_param.get_key() and (
param.get_key() in other_param._type or \
param.get_key() in other_param._hide): other_param.update()
#update
self._update()
return True
def run(self):
"""
Call run().
@return true if a change occured.
"""
original_data = list()
for param in self.block.get_params():
original_data.append(param.get_value())
gtk.Dialog.run(self)
self.destroy()
new_data = list()
for param in self.block.get_params():
new_data.append(param.get_value())
return original_data != new_data
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