🚀 go-pugleaf

>
> I also hope that in your rush, you left out wrap checking for mag.
> What happens when you zoom all the way down to 0, then zoom one more
> time? (Or zoom up and wrap back to 0?)
>


Well, there's another issue that I haven't quite figured out.

I'm using mag as a value for SetWindowExtEx
    SetWindowExtEx(hdc, mag, mag, NULL);
    SetWindowOrgEx(hdc, mag/2, mag/2, NULL);

I also use the mouse to pan...I capture the first location with the mouse
down, allow a drag, then final location on mouse up.  I call the difference
vox and voy...I then   SetViewportOrgEx using these values...

    SetViewportOrgEx(hdc, vox, voy, NULL);

Does it sound like I don't know what I'm doing???  heheh...you're right.  I
couldn't find any examples of pan and zoom using these, but from Petzold, it
appeared that it was do-able.

I have it working.....somewhat.  The pan works nicely.  The zoom seems to be
from the upper-left corner "perspective".  I know I'm not describing it very
well...I'm really experimenting with it right now...hoping I'll happen on
the right combination.

I could go on and on....but I'm sure having fun with it anyway!!!  Petzold's
book is a hoot!!!

I have done some programming using the features of BCB with forms, etc and
that sure makes it nice, but I'm just hacking away with the OLD way to get a
thorough knowledge of how this all works.