.Is it Really a Problem?First of all, the mere fact that there is no such Geometry type looks quite weird. Sectors and segments always were must-haves in all kinds of vector graphics. And, as we can see, adding such types is simply an unsolvable problem.But let’s consider something simpler first: is it possible to create an arc sector or segment primitive and place it on the form?
![Draw Draw](/uploads/1/2/5/5/125519328/824096320.jpg)
Sep 18, 2012 - This is a very quick way to do it. It can be changed into a style and it could be made more flexible by creating a TemplatedControl allowing the. This is an old thread, but in case someone else is looking to change the color of the checked circle inside a radio button, this worked for me without changing the control template: (1) On the loaded event of the radio button, use a find visual children function (get one here) to locate the ellipse in the visual tree beneath the button.
Yes, of course, but how? It turned out surprisingly difficult. Of course, I could have taken it for my own dullness, if I could find a solution working for all cases.
Many answered the question on how to draw an arc from some starting to some ending angle, but I wonder, was it so difficult to test such “solution” to have both angles in each quadrant and quadrant boundaries in? The problem looks quite simple but no, I did not find anything completely working.The only thing dealing with a part of an ellipse/circle is System.Windows.Media.ArcSegment; and its API looks, to say the least. Well, it’s always possible to find out how it works, but it’s more important that this PathSegment type cannot show 360° ellipse anyway. It could be combined with EllipseGeomentry, but.Much more fundamental problem is the lack of the possibility to create custom Geometry. According to official Microsoft documentation on System.Windows.Media.Geometry,. All classes derived from Geometry are sealed, so we still cannot create a derived class indirectly.
It makes certain things impossible. For example, there is no a way to place arc-related geometry in XAML where the Geometry type is expected, which is important for the and some other applications. End of story.After all, I implemented those functionally equivalent features using Geometry, like clipping and animation, but not in the same way the class Geometry was designed for; and it partly defeats the purpose of this fundamentally important class, unfortunately.It would be possible to make something functionally equivalent, for example, with custom System.Windows.Media.PathSegment, but the same story goes here:.I feels like Microsoft is doing pretty good job intended to block development in this direction. The SolutionFirst idea it to create a class EllipticalArcGeometry, instead of real Geometry. The use of implicit type cast operator can make the use of it quite easy; the instance of the type can be use in most cases where Geometry instance can be used.
LesterLobo - MSFT wrote:you would have to change the templateyou can check this examlple whic includes a circular button for the close optionI've had a look at that, and I can't see how it makes a round button. It seems to me you have;1) a canvas2) a circle (ellipse with equal height and width)3) a square buttonBeing a canvas, you've absolutely positioned the button over the circle. However, the button is still a square. This means you can click the button whilst you are visually off of it.I would prefer a truly round button, with all the standard button members/events etc.Is this do-able?thanks againjzf.