2007-01-19 Chris Toshok <toshok@ximian.com>

2007-01-19  Chris Toshok  <toshok@ximian.com>

	* DataGridColumnStyle.cs: stop setting _readonly in the
	PropertyDescriptor setter.  fixes a unit test failure.

	also, rename ParentReadOnly to TableStyleReadOnly, and have it
	just consult our table style (if we have one).  We don't need to
	consult the datagrid readonly attribute because that's passed in
	as the _ro arg to Edit.  this simplifies things a little.

	* DataGrid.cs: use CurrentColumn instead of
	current_cell.ColumnNumber just to simplify some of the code.

	switch the order of some things in the CurrentCell setter to keep
	the previous cell from getting a textbox again -
	EnsureCellVisibility causes scrolling to happen, which calls Edit.
	So we need to set the new cell before calling it.

	call Edit in OnEnter, as does Microsoft.

	also, make sure the current table style isn't the one we create
	initially when checking to see if it's different than the one
	we're setting it to in BindColumns (this fixes #80421).

	* GridTableStylesCollection.cs: table styles can have "" for a
	mapping name.  part of the fix for #80421.

	* DataGridTextBoxColumn.cs: simplify the readonly calculation in
	Edit significantly.

svn path=/trunk/mcs/; revision=71351