Hi. I'm attempting to create an interface where I have two list fields side by
side. I would like the user to be able to click in the space between the two
lists and then drag left or right to and have the lists widths to be resized.
What I've attempted to do, is to put a tall narrow rectangle in the space
between the two fields and then have it respond to the mouseDown and dragMove
messages.
They look like this:
on mouseDown
-- I set the dragdata, because the documentation led me to believe
-- it was necessary to get the rectangle to respond to dragMove messages
set the dragdata["text"] to "text being dragged"
-- the rectangle's width is 10 and so this immediately moves the rectangle
-- to be centered to the pointer, if the pointer escapes the rectangle, the
drag
-- operation fails
set the left of me to the mouseH - 5
end mouseDown
on dragMove
-- again, this centers the rectangle to the pointer
set the left of me to the mouseH - 5
-- this resizes the left hand field to be one pixel away from the rectangle
set the width of field LeftSideField to the mouseH - 6
-- this gets the left hand field positioned properly again against the left
-- edge of the window
set the left of field LeftSideField to 0
-- then, I set the width of the right hand field and fix it's position
set the width of field RightSideField to width of this stack - the mouseH - 6
set the left of field RightSideField to width the mouseH - 6
end dragMove
Now, this mostly works, but not as well as I'd like. If you move the pointer
too quickly (which is not hard to do), it will escape from the rectangle and
your drag operation will stop and the dragMove messages will start making their
way up the message path. Also, even if you drag slowly enough to avoid this,
when the window is resized and the fields resize based on their geometry
settings, they are no longer within one pixel of the rectangle.
I'm thinking that there has two be a better way to accomplish what I'm trying
to do in Revolution. I'm hoping that someone out there will be able to set me
straight. Thanks in advance. :-)
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