| [Overview][Constants][Types][Classes][Procedures and functions][Index] |
Specifies an event handler used to get the Height for a single item in an owner-drawn list box or combo-box.
Source position: stdctrls.pp line 284
type TMeasureItemEvent = procedure( |
Control: TWinControl; |
Index: Integer; |
var AHeight: Integer |
) of object; |
Control |
|
The list box or combo-box control. |
Index |
|
Index of the list item to measure. |
AHeight |
|
Height of the list item in pixels. |
TMeasureItemEvent is an object procedure type which specifies an event handler signalled to get the height for a single item in an owner-drawn list box or combo-box control. Arguments passed to the handler include the control for the event notification, the index position for the item measured in the handler, and the derived height for the item.
TMeasureItemEvent is the type used for the OnMeasureItem property in TCustomComboBox and TCustomListBox. An application must implement and assign a procedure using the signature for the handler to respond to the event notification. The handler should account for variable height items when enabled in settings for the control.
|
Handler invoked when the height for an item is needed. |
|
|
Handler invoked when the height for an item is needed. |
| Version 3.2 | Generated 2024-02-25 | Home |