TCustomShellTreeView.DoSelectionChanged procedure
Performs actions needed when a new item is selected in the shell control.
Declaration
procedure DoSelectionChanged; overrideDescription
DoSelectionChanged is an overridden method used to perform actions
needed when a new item is selected in the shell control. DoSelectionChanged
calls the inherited DoSelectionChanged method, and ensures that a
TCustomShellListView control assigned to
ShellListView
is synchronized to the current selection in the class.
No actions are performed in the method if values for either
ShellListView or Selected have not been assigned
(contain Nil).
Selected contains the current tree node selected in the shell
control, and is used to determine if the selection is a file, directory, or
other device. When it is a directory, its path is assigned to the
Root property in
ShellListView.
If Selected does not represent a directory, the path refers to a
file name that must exist on the local file system. An EShellCtrl
exception is raised if the selected item does not exist. If
Selected has a parent tree node, its path is assigned to the
Root property in ShellListView. If no parent is
available, the Root property in ShellListView is set to
an empty string ('').
Errors
Raises an
EShellCtrl exception if Selected refers to a file name
that no longer exists on the local file system.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.