ImageEn, unit imageenview |
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TImageEnView.OnImageChangeEx
Declaration
property OnImageChangeEx: TIEImageChangeEvent;
Description
Occurs after the image is modified using
TImageEnProc (
Proc property) or
TImageEnIO (
IO property).
If you are using multiple
Layers, then layer changes will also trigger
OnImageChangeEx.
Note:
◼ This event is triggered by editing methods in
TImageEnProc or in TImageEnView (e.g.
Clear). Not by changes to the
IEBitmap◼ OnImageChangeEx is the same as
OnImageChangeEx, except that it includes a parameter showing whether the change is due to the image or layers
◼ TImageEnProc calls
ImageChange after a modification which actuates
OnImageChangeEx.
Example
procedure TForm1.ImageEnView1ImageChangeEx(Sender: TObject; ChangeSource: Integer);
begin
// Update button status only when the image changes (not layers)
if ChangeSource <> iecsLayers then
UpdateButtons();
end;
See Also
◼ OnImageChange◼ OnLayerNotify