🚀 go-pugleaf

In article <18565@mindlink.bc.ca> Steve_Goyette@mindlink.bc.ca (Steve Goyette) writes:
>HI all,
>
>        I would like to be able to plot a line between two points with
>handles on each end.  And then be able to re-position the line by draging the
>handles. I can do this by capturing the mouse moves and re-painting, but I
>don't want to have to re-paint a large area (Which is used by a drawing)  Any
>ideas???
	Draw it using R2_XORPEN or R2_NOT mode (function SetROP2).
	You will need to draw it twice for each movement:
		draw initial line at (x,y) in XOR mode
	when you drag it to a new (xnew,ynew) point:
		draw at (x,y) again in XOR mode to erase
		x=xnew;y=ynew;
		draw at (x,y) in XOR mode
	Repeat this cycle as you move it.
-- 
John A. Grant						jagrant@emr1.emr.ca
Airborne Geophysics
Geological Survey of Canada, Ottawa