Possible regression from #fe260a8
Regression: -reloadData does not reload views any more even if the table is empty (see CPOutlineViewCibTest).
BUG: -removeTableColumn: error.
Conflicts:
AppKit/CPOutlineView.j
AppKit/CPTableHeaderView.j
AppKit/CPTableView.j
Fixed: Starting a column drag is now faster.
Fixed: When dragging a selected column, selection is now drawn on the dragging view and the cursor is the closed hand.
Fixed: When dragging a table column, underlying columns were sliding according to the tracking location instead of the column lateral edges.
Fixed: In CPTableView, the drop indicator for rows could appear when dragging a column.
This commit creates directly the dragging column instead of relying on
built-in drag&drop. Also fixes a bug where the drop indicator would appear when
dragging a column if some rows were previously drag&dropped.
New: preparedViewAtColumn:row:
These methods allow to enumerate visible data views or data views in specified columns and rows.
-enumerateAvailableViewsUsingBlock: is the counterpart of cocoa's -enumerateAvailableRowViewsUsingBlock: except that it enumerates data views instead of CPTableRowView and the block has an additional column parameter.
This commit reverses the way views are stored and accessed in the table view: rows>columns instead of columns>rows.
Applied the second method where it is relevant, making the code more compact and readable.