def edit_cell ( self, parent, row, column ):
""" Returns the editor widget to use for editing a specified cell's
value.
"""
self.cell_row = self.data_row_for( row )
# Get the editor factory to use. If none, exit (read-only cell):
editor_factory = self.grid_adapter.get_editor( self.cell_row, column )
if editor_factory is None:
return None
# Create the requested type of editor from the editor factory:
# Note: We save the editor reference so that the editor doesn't get
# garbage collected too soon.
self.cell_column = column
object, name = self.grid_adapter.get_alias( self.cell_row, column )
editor = editor_factory.simple_editor(
self.ui, object, name, '' ).set(
item = self.item,
object_name = '' )
# Tell the editor to actually build the editing widget:
editor.prepare( control_adapter( parent ) )
# Make sure that the editor is a control (and not a layout):
self._editor = editor
control = editor.control
if not isinstance( control, QWidget ):
layout = control
control = QWidget( parent )
control.setLayout( layout )
layout.setContentsMargins( 5, 0, 5, 0 )
control._editor = editor
# Adjust the row height of the grid row to fit the editor control:
height = control.height()
if height > self.height:
if (self.height - height) <= 4:
# If the difference is not too great, then we will just adjust
# the grid height to accomodate it:
self.row_height( height )
else:
# Otherwise, just adjust the height of this row temporarily:
control._row = row
self.control.verticalHeader().resizeSection( row, height )
# Resize the grid column width to fit the editor if necessary:
width = control.width()
header = self.control.horizontalHeader()
column_width = header.sectionSize( column )
if width > column_width:
control._column = column
control._width = column_width
header.resizeSection( column, width )
# Return the editing widget as the result:
return control
