TCustomHeaderControl.SectionDrag function
Signals the OnSectionDrag event handler (when assigned and enabled).
Declaration
function SectionDrag(FromSection: THeaderSection;
ToSection: THeaderSection): Boolean; virtualArguments
FromSection | Section to be dragged on the header control. |
ToSection | Section that is the potential drop target for the drag operation. |
Function result
True if the drag operation can be performed the selected section.Description
SectionDrag is a
Boolean function used to signal the
OnSectionDrag event handler when a drag operation is started for a section on
the header control. The return value is
True if the DragReorder
property is enabled, and the OnSectionDrag event handler has been assigned and
allows the drag operation for the specified source and destination sections.
No actions are performed in the method if DragReorder is set to False.
Update the AllowDrag argument in the TSectionDragEvent handler to indicate whether the section in FromSection can be dragged to the position for the section in ToSection.
SectionDrag is called from the MouseMove method when a Shift+Left mouse button event is detected on one of the Sections for the control.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.