[Interest] Distance from point to path.

[william.crocker at analog.com]

>>>>
>>>> Given a QPoint and a QPainterPath.
>>>> How do I find the distance from the QPoint to the
>>>> closest point along the QPainterPath.
>>>>
>
> Perhaps. But you should consider that QPainterPath is, as the name
> suggests, primarily for painting, and not meant for solving generic
> geometric problems. So I'm not sure how a feature request for this
> would be received by the Qt devs. Point projection is one problem, but
> there are many others, and they are surely not all within the scope of
> QPainterPath.
>

I think Qt opened the door for geometric consideration when they
invented the scene, gave items mouse-event-handlers and provided
intersection based item queries.   :-)

> If I were you, I would instead try to find a library that can
> calculate the minimum point-to-bezier distance, or if you feel up for
> it, implement it yourself. The line case is trivial.

I do not take the addition of a new library and the subsequent
dependency lightly.

In this case, I will just brute force with pointAtPercent.

Thanks.

Bill

>
> Elvis
>
>>
>> I could then use QGraphicsScene::items() to find the
>> intersecting set of a bounding rectangle around the
>> mouse click and then nail it down with distance to
>> each object in that set.
>>
>>
>>> Elvis
>>>
>>>>
>>>> Thanks.
>>>>
>>>> Bill
>>>>
>>>> ---------
>>>> All of the above to find the shape closest to a mouse click.
>>>> Note that methods are provided to find the set of objects
>>>> which intersect a rectangle centered on the point, but which one
>>>> is really the closest?
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>>>
>>>
>>>
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>
>