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Subject: Re: picking question results
Dieter, I don't think you're misunderstanding. Current score: 3 implementations will pick the hollow/empty; 2 will not. I don't really care how it is resolved. But it needs quick resolution. Any further input? Does anyone who does pick hollow/empty have strong feelings against changing? (Basically, you'd have to treat it like a line object in your pick candidates list.) -Lofton. At 12:23 PM 6/1/01 +0200, Dieter Weidenbrueck wrote: >Lofton, > >I looked at the standard and at our implementation, but probably I'm missing >something here. > >1. Case: Circle with "hollow" fill , fill color is black >We produce from that a circle element that has no fill but an edge contour. >Obviously "hollow" suggests that you can look through the center of the >circle. A click into this "hollow" area does NOT hit the circle in our case, >and I believe it shouldn't. >Example: >Draw another element behind the circle that becomes visible inside the >hollow area of the circle. A click on this element would not hit the circle >but the element behind, thus being consistent with the "hollow" visual >appearance. > >2. Case: Circle with "empty" fill but edge >Again we produce a circle that has no fill but an edge contour. >The behavior is identical to the one described above, and all comments >apply. > >In both cases if the fill style is set to "solid" and the fill color to >white we will associate a click with this circle. However, this will look >very different visually if another element is behind the circle. > >Since everybody is moving so strongly into the opposite direction I assume >that I misunderstand something here? > >Dieter > > >----- Original Message ----- >From: "Lofton Henderson" <lofton@rockynet.com> >To: <cgmopen-members@lists.oasis-open.org> >Sent: Thursday, May 31, 2001 6:30 PM >Subject: picking question results > > > > CGM Open members -- > > > > I had 4 responses to the question about picking a hollow or empty > > filled-area object with a visible border or edge. 3 agreed that, "yes", a > > mouse click in the interior picks the object. > > > > One wrote: > > > > >We pick only on the border of empty or hollow filled primitives, i.e. > > >rectangles, > > >polygonal fill areas, circles, closed arcs... > > > > > >It is actually simpler (programming wise) and faster (computing time) to > > >make the whole > > >interior hot especially for circles and arcs. I would be interested to > > >hear what others > > >are doing. For the sake of consistency in viewers, we may change to >conform. > > > > Therefore, I interpret that there is unanimous approval for the "yes" > > interpretation. We will clarify the offending (vague) language which > > raised the question. > > > > Regards, > > Lofton. > > > > > > ------------------------------------------------------------------ > > To unsubscribe from this elist send a message with the single word > > "unsubscribe" in the body to: cgmopen-members-request@lists.oasis-open.org ******************* Lofton Henderson 1919 Fourteenth St., #604 Boulder, CO 80302 Phone: 303-449-8728 Email: lofton@rockynet.com *******************
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