Hi all,
I just accidentally discovered something curious:
Given a card with a any control object on it, and the following two handlers in
the card script, the outcome is identical:
on mouseDown
if the target <> me then
grab the target
end if
end mouseDown
on mouseMove
if the target <> me then
grab the target
end if
end mouseMove
In other words, when you click down on an object that isn’t the card itself,
the object follows the mouse until you release it.
This is not what I would expect. I would expect that the mouseDown handler
works as I described, but that the mouseMove handler would grab a control as
you moved over it and follow it around. I’m not saying that’s a desirable
thing, just what I would expect.
The Dictionary says,”Use the grab command within a mouseDown handler to drag an
object around the stack window without selecting it.” That implies that grab
was only intended to work on mouseDown. When grab happens in a mouseMove
handler it seems to generate an implicit mouseDown.
So my question is, is this a bug, a quirk, or a feature? If it’s a bug, I file
a report.
Devin
Devin Asay
Director
Office of Digital Humanities
Brigham Young University
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