Can I draw a line (or better any polygon) directly on screen?

[Igor Couto]

Hi all,

On Thursday, July 10, 2003, at 03:57  AM, Richard Gaskin wrote:

>> On Tuesday, July 8, 2003, at 02:30 AM, Joël Guillod wrote:
>>
>>> Is there a easy way to draw any line on screen?
>>
>> Maybe you can draw a line in separate stack and use windowShape.
>>

Without having tried any of this, how about this solution:

1) Make a stack with only 1 single object - a line.

2) Using the windowShape property, set the stack to be totally 
transparent (you can do this by using an image which is totally 
transparent as the 'shape' for the windowShape property).

This means that in this stack, the only object able to be seen and to 
receive user-triggered events is the LINE you placed previously. This 
stack is effectively THE CONNECTING LINE you wish to 'draw' between the 
2 drag-and-drop points.

3) Hide the 'line stack'.

Now, the tricky part: you want the line to SHOW up when the user first 
clicks down on 'stack 1', RESIZES as the user moves the mouse, and then 
HIDE when the user releases the mouse over 'stack 2' (I suppose this is 
the behaviour you want). To do this:

1) 'Stack 1' must have a handler 'on mouseDown', which SHOWS the stack 
'line', resizes the line, and positions it right underneath the mouse 
cursor.

2) the 'Line' stack has to have a handler 'on mouseMove' that RESIZES 
the line (ie, re-sets the 'points' property of the line).

3) the 'Line' stack also has to have a handler 'on mouseUp' that hides 
itself.

As I said, I haven't actually tried implementing any of this, but in my 
(Rev newbie) mind, it feels as if it should work!

Good Luck!
--
Igor de Oliveira Couto
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igor at pixelmedia.com.au
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