I have 2 scroll views, both of which are supposed to scroll vertically. The outer scroll view (red) contains a search bar and the inner scroll view (blue). The inner scroll view is supposed to scro...

How would you detect touches only on non-transparent pixels of a UIImageView, efficiently? Consider an image like the one below, displayed with UIImageView. The goal is be to make the gesture reco...

I have a DrawingVisual element that rappresents a path which geometry is described by this syntax: "m106,59.3c0-1.98,0,0-4.95,0.989-3.96,0.989-13.8,3.96-20.8,4.95-6.92,0-14.8-3.96-17.8-3.96-1.98...

I'm trying to fix a bug that involves UIView hitTest:withEvent: being called on my view when the touches are on the UIKeyboard, but only after the app has been in the background. It was occurring ...

I want to make a custom control which will be used as an overlay. The control should contain a couple of child controls which should be drawn and should be clickable as usual. But everything else i...

I'm trying to implement collision detection for SVG text elements using client side JavaScript. The hit-test should check if any glyph of a text overlaps any glyph of another text element. Since ge...

I have a listview which displays a lot of info, but when it's empty I want to overlay a textblock over it which says "No Info to Display" or "Do bla-bla-bla to add info". The listview is set up to...

How do I translate mouse coordinates into world coordinates using GDI+? Or get bounding boxes (or even better) old skool regions for SVG shapes drawn using GDI+? Anyway. I've been looking for SVG ...

I have a view hierarchy which contains smaller views on a scroll view. Each view can have subviews in it such as buttons etc. For some reason, buttons on the view aren't clicked; exploring this f...

I am trying to find a way to get a particular UIView given a CGPoint. Briefly, I want to do a hit test. For example, I have a UIView which has many subviews whose sizes are smaller than the parent...

Ok, so my previous question did not produce any useful answers, so I'll try to come from a different direction. My application has, potentially, several windows. Given a point in screen coordinate...

I have some images drawn on a HTML5 Canvas and I want to check if they are hit on mouse click. Seems easy, I have the bounds of the images, however the images are transformed (translated and scaled...

I have the coordinates (X,Y) of a point in an HTML document. How do I determine what DOM node is at those coordinates? Some ideas: Is there a DOM hit test function that I missed, that takes a po...