TImageEnMView.OnImageIDRequestEx
Declaration
property OnImageIDRequestEx: TIEImageIDRequestExEvent;
Description
Occurs whenever an image is required if you have specified a value for the
ImageID property.
ID is the value you have specified in
ImageID property.
Bitmap is the image to display. It is a
TIEBitmap (use
OnImageIDRequest if you require a TBitmap). The bitmap is copied in TImageEnMView, and then automatically freed.
Note:
◼You must have specified and
ImageID of >=0 or the OnImageIDRequestEx event will not fire (the value of ImageID is not used by ImageEn, so any value is acceptable).
◼The Bitmap you specify for
OnImageIDRequestEx will be freed by the control, so ensure you pass a temporary object
| Demos\Multi\Multi-OnDemand\MViewOnRequest.dpr |
| Demos\InputOutput\TiffHandler2\TiffHandler2.dpr |
procedure TMyForm.ImageEnMViewOnImageIDRequestEx(Sender: TObject; ID: integer; var Bitmap: TIEBitmap);
begin
// Create the image dynamically
Bitmap := TIEBitmap.create;
GenerateChartOfID(ID, Bitmap);
end;
See Also
◼OnImageIDRequest◼OnGetLoadFilename