Re: Dragging a Canvas::Line with the mouse?

[walt <w41ter gmail com>]

zentara wrote:
> On Thu, 19 Jun 2008 11:38:42 -0700
> walt<w41ter gmail com>  wrote:
>
> > Hi again,
> >
> > I need to draw a vertical line on a canvas, to be used as a cursor
> > that can be moved horizontally in response to a mouse click or a
> > keystroke.
> >
> > The only graphics trick I know is to draw the line by XOR'ing it
> > with the canvas and again a second time to erase it.  (That's to
> > avoid redrawing the whole screen with every move of the cursor.)
> >
> > Is there a way to do that with gtk-perl?
>
> Can you be more specific on what you want to action to be? Do you
> want to draw a line, then drag it with the mouse, and/or move
> it with the arrow keys?
>
> It ought to be pretty simple.

Thanks for another wonderful reply.  If the timestamps on your messages
are correct, you took 9 minutes to come up with that code.  Please tell
me you cut and pasted it from somewhere ;o)

I'll need to study your code for a while before I understand it, but I
can tell already that it will be close to what I need, anyway.

I'm off to study it now, and meanwhile thank you!