A layer will persist as long as needed (even if RulerMode is enabled). If you are wanting the same effect as the measure interactions (e.g. miMeasureLength), but have the layer persist after positioning, then use a layer creation interaction, such as mlClickCreateLineLayers (and in the OnNewLayer event enable RulerMode).
Then to "burn" it into the image you can use LayersMerge();
But as an result I get a black rectangle at the left side (or top), with the meausrement-info in it and connected with a line. But the measurement is not right, it seems that the size of the rectangle.with (or hight, depends on the direction the mouse is moved) is substracted.
Strictly speaking it is better to use OnLayerNotify to know the get the end of layer creation:
procedure TForm1.ImageEnView1LayerNotifyEx(Sender: TObject; layer: Integer;
event: TIELayerEvent);
begin
if event = ielCreated then
ImageEnView1.LayersMerge();
end;
But I cannot see any issues either way. Can you post some screenshots of what you are seeing?
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Draw Measurements result into the image
Posted - Feb 21 2023 : 12:39:53
