It sounds to me like you want to have a touch-screen-friendly option, to cover the following scenarios: iPhone-like devices: small screen, touch only Small screens, no touch (you didn’t mention this one) Large screens, no touch (i.e. conventional computers) Touch-screen-enabled large screens such as iPad, notebooks/pcs with touch screens. For case 1 and 2 you … Read more
This code can distinguish between click and movement (drag, scroll). In onTouchEvent set a flag isOnClick, and initial X, Y coordinates on ACTION_DOWN. Clear the flag on ACTION_MOVE (minding that unintentional movement is often detected which can be solved with a THRESHOLD const). private float mDownX; private float mDownY; private final float SCROLL_THRESHOLD = 10; … Read more
The event must be cancelable. Adding an if statement solves this issue. if (e.cancelable) { e.preventDefault(); } In your code you should put it here: if (this.isSwipe(swipeThreshold) && e.cancelable) { e.preventDefault(); e.stopPropagation(); swiping = true; }
We have the following lists: touches: A list of information for every finger currently touching the screen targetTouches: Like touches, but is filtered to only the information for finger touches that started out within the same node changedTouches: A list of information for every finger involved in the event To better understand what might be … Read more
As of April 13th 2012 In Google Chrome developer and canary builds there is now a checkbox for “Emulate touch events” You can find it by opening the F12 developer tools and clicking on the gear at the bottom right of the screen. For now (Chrome ver.36.0.1985.125) you can find it here: F12 => Esc … Read more
An easy solution, as you mentioned, is to simply connect the points with a straight line. Here’s the code to do so: public void onDraw(Canvas canvas) { Path path = new Path(); boolean first = true; for(Point point : points){ if(first){ first = false; path.moveTo(point.x, point.y); } else{ path.lineTo(point.x, point.y); } } canvas.drawPath(path, paint); } … Read more
@ape wrote an answer here on how to intercept the map clicks, but I need to intercept the touches, and then he suggested the following link in a comment of its answer, How to handle onTouch event for map in Google Map API v2?. That solution seems to be a possible workaround, but the suggested … Read more
If you haven’t already, I would suggest reading the source code for Hammer.js https://github.com/hammerjs/hammer.js/blob/master/hammer.js Between comments and code it’s about 1400 lines, there is great documentation and the code is easy to understand. You can see how the author has chosen to solve a lot of the common touch events: hold, tap, doubletap, drag, dragstart, … Read more
Assume you have a UIView scene with a background image and many vehicles, you may define each new vehicle as a UIButton (UIImageView will probably work too): UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button addTarget:self action:@selector(imageTouch:withEvent:) forControlEvents:UIControlEventTouchDown]; [button addTarget:self action:@selector(imageMoved:withEvent:) forControlEvents:UIControlEventTouchDragInside]; [button setImage:[UIImage imageNamed:@”vehicle.png”] forState:UIControlStateNormal]; [self.view addSubview:button]; Then you may move the vehicle wherever you want, … Read more
Now some mobile browsers eliminate 300 ms click delay if you set the viewport. You don’t need to use workarounds anymore. <meta name=”viewport” content=”width=device-width, user-scalable=no”> This is currently supported Chrome for Android, Firefox for Android and Safari for iOS However on iOS Safari, double-tap is a scroll gesture on unzoomable pages. For that reason they … Read more