--- /dev/null
+"""
+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 Utils
+from Element import Element
+import pygtk
+pygtk.require('2.0')
+import gtk
+
+PARAM_MARKUP_TMPL="""\
+#set $foreground = $param.is_valid() and 'black' or 'red'
+#set $value = not $param.is_valid() and 'error' or repr($param)
+<span foreground="$foreground" font_desc="Sans 7.5"><b>$encode($param.get_name()): </b>$encode($value)</span>"""
+
+PARAM_LABEL_MARKUP_TMPL="""\
+#set $foreground = $param.is_valid() and 'black' or 'red'
+#set $underline = $has_cb and 'low' or 'none'
+<span underline="$underline" foreground="$foreground" font_desc="Sans 9">$encode($param.get_name())</span>"""
+
+TIP_MARKUP_TMPL="""\
+Key: $param.get_key()
+Type: $param.get_type()
+#if $param.is_valid()
+Value: $param.get_evaluated()
+#elif len($param.get_error_messages()) == 1
+Error: $(param.get_error_messages()[0])
+#else
+Error:
+ #for $error_msg in $param.get_error_messages()
+ * $error_msg
+ #end for
+#end if"""
+
+class Param(Element):
+ """The graphical parameter."""
+
+ def update(self):
+ """
+ Called when an external change occurs.
+ Update the graphical input by calling the change handler.
+ """
+ if hasattr(self, '_input'): self._handle_changed()
+
+ def get_input_object(self, callback=None):
+ """
+ Get the graphical gtk object to represent this parameter.
+ Create the input object with this data type and the handle changed method.
+ @param callback a function of one argument(this param) to be called from the change handler
+ @return gtk input object
+ """
+ self._callback = callback
+ self._input = self.get_input_class()(self, self._handle_changed)
+ if not self._callback: self.update()
+ return self._input
+
+ def _handle_changed(self, widget=None):
+ """
+ When the input changes, write the inputs to the data type.
+ Finish by calling the exteral callback.
+ """
+ self.set_value(self._input.get_text())
+ self.validate()
+ #is param is involved in a callback? #FIXME: messy
+ has_cb = \
+ hasattr(self.get_parent(), 'get_callbacks') and \
+ filter(lambda c: self.get_key() in c, self.get_parent()._callbacks)
+ self._input.set_markup(Utils.parse_template(PARAM_LABEL_MARKUP_TMPL, param=self, has_cb=has_cb))
+ #hide/show
+ if self.get_hide() == 'all': self._input.hide_all()
+ else: self._input.show_all()
+ #set the color
+ self._input.set_color(self.get_color())
+ #set the tooltip
+ if self._input.tp: self._input.tp.set_tip(
+ self._input.entry,
+ Utils.parse_template(TIP_MARKUP_TMPL, param=self).strip(),
+ )
+ #execute the external callback
+ if self._callback: self._callback(self)
+
+ def get_layout(self):
+ """
+ Create a layout based on the current markup.
+ @return the pango layout
+ """
+ layout = gtk.DrawingArea().create_pango_layout('')
+ layout.set_markup(Utils.parse_template(PARAM_MARKUP_TMPL, param=self))
+ return layout