TCustomListBox.DoSelectionChange procedure
Signals the OnSelectionChange handler.
Declaration
procedure DoSelectionChange(User: Boolean); virtualArguments
User | True when the selection change results from user interaction with the control. |
Description
DoSelectionChange performs actions needed when the selected item
in the list box control has been changed. DoSelectionChange signals the
OnSelectionChange event handler (when assigned).
User indicates if the selection was changed as a result of user
interaction with the control, as opposed to a change performed in code at
run-time. When User is set to
True, and
ClickOnSelChange is
enabled, an internal flag is set to prevent execution of the method by a
subsequent mouse click.
DoSelectionChange is called when the LM_SelChange message is handled
for the control, and when a new value is assigned to the ItemIndex
property. User is set to False when the selection change is caused by
setting a new value in ItemIndex.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.