TImageEnMView.OnAcquireBitmap
Declaration
property OnAcquireBitmap: TIEAcquireBitmapEvent;
Description
Occurs whenever a new bitmap is acquired during a multi-page Twain acquisition.
| Parameter | Description |
| Sender | Will be either a TImageEnIO or TImageEnMIO control |
| ABitmap | A TIEBitmap object that contains the acquired image |
| DpiX, DpiY | The DPI of the acquired image |
| Handled | Setting Handled to True causes ImageEn to ignore this image (i.e. the current image won't be inserted into the TImageEnMView control, if attached). Handled has no effect when acquiring via a TImageEnView/TImageEnIO |
Note: Handled defaults to False.
Examples
// Skip retrieval of images that are less than 500x500 pixels
procedure TForm1.ImageEnMView1AcquireBitmap(Sender: TObject; ABitmap: TIEBitmap; DpiX, DpiY: Integer; var Handled: boolean);
begin
if ( ABitmap.Width < 500 ) or ( ABitmap.Height < 500 ) then
Handled := True;
end;
// Save scanned images directly to file without adding them to a TImageEnMView
procedure TForm1.ImageEnMView1AcquireBitmap(Sender: TObject; ABitmap: TIEBitmap; DpiX, DpiY: Integer; var Handled: Boolean);
var
filename: string;
begin
filename := 'C:\Scanned Documents\Scan_' + FormatDateTime( 'yymmdd-hhnnss-zzz', Now ) + '.jpg';
ABitmap.Write( filename);
Handled := True;
end;