[Tcl-bugs] [ tktoolkit-Bugs-226357 ] Overlapping with Polygon objects wrong

[<no...@so...>]

Bugs item #226357, was updated on 2000-12-19 09:14
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112997&aid=226357&group_id=12997

Category: Canvas Items
Group: 8.4a3
Status: Open
>Resolution: Fixed
Priority: 7
Submitted By: Gerhard Hintermayer (hinteger)
Assigned to: Nobody/Anonymous (nobody)
Summary: Overlapping with Polygon objects wrong

Initial Comment:
According to the man page a point inside the polygon should return the polygon id when calling [canvas find overlapping]. Don´t know when this changed, it worked well under 8.0.5, and does not work with 8.4a1 and 8.4a2.

----------------------------------------------------------------------

>Comment By: John Ellson (ellson)
Date: 2001-05-30 11:39

Message:
Logged In: YES 
user_id=3788

Here's a fix, I think.

I can think of no reason why a test for fill is needed at
line 1488 in tkCanvPoly.c.
.
Anyway, removing the test works for me (see patch)

(How does this fix get into CVS now?)





----------------------------------------------------------------------

Comment By: Gerhard Hintermayer (hinteger)
Date: 2001-05-30 10:38

Message:
Logged In: YES 
user_id=124720

Yes, that's true. The error must have been introduced
somewhere after 8.0.5 and before 8.3.2 (I migrated my script
from 8.0.5 to 8.3.2 and discovered the bug)
In addition <Enter> and <Leave> events are _not_ generated,
if you move the mouse over the polygon so fast, so that you
don't hit a vertice.


----------------------------------------------------------------------

Comment By: John Ellson (ellson)
Date: 2001-05-30 10:11

Message:
Logged In: YES 
user_id=3788

The problem seems to be specific to -fill ""

e.g. this fails in 8.4a3 from CVS 5/30/01

pack [canvas .c]
.c create poly 30 30 30 90 90 90 90 30 -fill "" -outline black
puts [.c find over 45 45 45 45]
puts [.c find over 0 0 0 0]


----------------------------------------------------------------------

Comment By: Gerhard Hintermayer (hinteger)
Date: 2000-12-21 08:08

Message:
I use -fill "" and -outline black for the polygon, i forgot to write that.
When the overlapping rectangle is over a vertice, it works, inside the polygon it does't

in your example .c find over 60 40 60 40 should return 1
I get an empty string

----------------------------------------------------------------------

Comment By: Donal K. Fellows (dkf)
Date: 2000-12-20 02:03

Message:
It seems to work for me under Solaris:
  $ /tmp/bin/wish8.4 
  % pack [canvas .c];.c create poly 30 30 90 90 30 90 90 30
  1
  % .c find over 40 40 45 45
  1
  % .c find over 40 40 40 40
  1
  % .c find over 0 0 0 0
  % .c find over 30 40 30 40
  % .c find over 40 30 40 30
  1
  % info patch
  8.4a2
Could you supply some more details?

----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112997&aid=226357&group_id=12997