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property_editor.py
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property_editor.py
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# PiTiVi , Non-linear video editor
#
# ui/gstwidget.py
#
# Copyright (c) 2005, Edward Hervey <bilboed@bilboed.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 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
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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.
"""
Widget for gstreamer element properties viewing/setting
"""
import gobject
import gtk
import gst
from gettext import gettext as _
def get_widget_propvalue(prop, widget):
""" returns the value of the given propertywidget """
# FIXME : implement the case for flags
type_name = gobject.type_name(prop.value_type.fundamental)
if (type_name == 'gchararray'):
return widget.get_text()
if (type_name in ['guint64', 'gint64', 'gint', 'gulong']):
return widget.get_value_as_int()
if (type_name in ['gfloat']):
return widget.get_value()
if (type_name in ['gboolean']):
return widget.get_active()
if type_name in ['GEnum']:
return widget.get_model()[widget.get_active()][1]
return None
def make_property_widget(unused_element, prop, value=None):
""" Creates a Widget for the given element property """
# FIXME : implement the case for flags
type_name = gobject.type_name(prop.value_type.fundamental)
if value == None:
value = prop.default_value
if (type_name == 'gchararray'):
widget = gtk.Entry()
widget.set_text(str(value))
elif (type_name in ['guint64', 'gint64', 'guint', 'gint', 'gfloat', 'gulong']):
widget = gtk.SpinButton()
if type_name == 'gint':
widget.set_range(-(2**31), 2**31 - 1)
elif type_name == 'guint':
widget.set_range(0, 2**32 - 1)
elif type_name == 'gint64':
widget.set_range(-(2**63), 2**63 - 1)
elif type_name in ['gulong', 'guint64']:
widget.set_range(0, 2**64 - 1)
elif type_name == 'gfloat':
widget.set_range(0.0, 2**64 - 1)
widget.set_digits(5)
widget.set_value(float(value))
elif (type_name == 'gboolean'):
widget = gtk.CheckButton()
if value:
widget.set_active(True)
elif (type_name == 'GEnum'):
model = gtk.ListStore(gobject.TYPE_STRING, prop.value_type)
widget = gtk.ComboBox(model)
cell = gtk.CellRendererText()
widget.pack_start(cell, True)
widget.add_attribute(cell, 'text', 0)
idx = 0
for key, val in prop.enum_class.__enum_values__.iteritems():
gst.log("adding %s / %s" % (val.value_name, val))
model.append([val.value_name, val])
if val == value:
selected = idx
idx = idx + 1
widget.set_active(selected)
else:
widget = gtk.Label(type_name)
widget.set_alignment(1.0, 0.5)
if not prop.flags & gobject.PARAM_WRITABLE:
widget.set_sensitive(False)
return widget
class PropertyEditor(gtk.VBox):
"""
Widget to view/modify properties of a gst.Element
"""
def __init__(self):
gtk.VBox.__init__(self)
self.element = None
self.ignore = None
self.properties = None
def setElement(self, element, properties={}, ignore=['name']):
""" Set given element on Widget, with optional properties """
gst.info("element:%s, properties:%s" % (element, properties))
self.element = element
self.ignore = ignore
self.properties = {} #key:name, value:widget
self._addWidgets(properties)
def _addWidgets(self, properties):
props = [x for x in gobject.list_properties(self.element) if not x.name in self.ignore]
if not props:
self.pack_start(gtk.Label("No properties..."))
self.show_all()
return
table = gtk.Table(rows=len(props), columns=2)
table.set_row_spacings(5)
table.set_col_spacings(5)
table.set_border_width(5)
y = 0
for prop in props:
label = gtk.Label(prop.nick)
label.set_alignment(0.0, 0.5)
widget = make_property_widget(self.element, prop, properties.get(prop.name))
table.attach(label, 0, 1, y, y+1, xoptions=gtk.FILL, yoptions=gtk.FILL)
table.attach(widget, 1, 2, y, y+1, yoptions=gtk.FILL)
self.properties[prop] = widget
y += 1
self.pack_start(table)
self.show_all()
def getSettings(self):
""" returns the dictionnary of propertyname/propertyvalue """
d = {}
for prop, widget in self.properties.iteritems():
if not prop.flags & gobject.PARAM_WRITABLE:
continue
value = get_widget_propvalue(prop, widget)
if not value == None:
d[prop.name] = value
return d