multi-touch | 易学教程

How to ignore certain UITouch Points in multitouch sequence

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问题 I am working on a drawing app for ipad, I am providing full screen for drawing. So as we all now, user might write with his wrist support or by resting his hand on the screen. So my aim is to allow the user to write freely with his wrist/hand support. But the app should only detect finger drawing, or ignore/reject wrist and hand touches and delete them I started working on it , I created a sample project with multitouch enabled. Below is my code - (void)touchesBegan:(NSSet *)touches withEvent

Disable or prevent multitouch in Activity

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I have several Views on an Activity which a user wants to touch quickly in succession and I capture these touches using a TouchListener and handling MotionEvent.ACTION_DOWN . However, if the user is using two hands, it's very likely that the next View will be 'Touch'ed before the user pulls the previous finger up. In this scenario, a MotionEvent.ACTION_MOVE is fired for the first view rather than the desired MotionEvent.ACTION_DOWN for the second view. Is there any way to work around or prevent this behavior? I've tried dispatching a new event with MotionEvent.ACTION_UP and also removing the

Way to make a UIButton continuously fire during a press-and-hold situation?

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You know how Mario just keeps running to the right when you press and hold the right-button on the D-Pad? In the same manner, I want my UIButton to continuously fire its action for the duration that it is held down. Is this possible for a UIButton? If not, is this possible to do with a UIImageView by overriding a touch handling method in a certain way? Actually, before trying to do get this done with UIButton I had some UIImageViews (Arranged to function as a D-Pad) that were checked by touch handling methods but things started to get messy so I thought this could be done easier with UIButton

Is there a way to trigger gesture events on Mac OS X?

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问题 I want to trigger multitouch gesture events on Mac OS X. Is there a way to do this? Mouse or keyboard events can be triggered with CGEventCreateMouseEvent and CGEventCreateKeyboardEvent. Is there similar low level function for multitouch events? Rok Your suggestion is not working. I've tried this code: - (void)rotateWithEvent:(NSEvent *)event { NSLog(@"ROTATE"); } -(IBAction)button:(id)sender { CGEventSourceRef eventSource = CGEventSourceCreate(kCGEventSourceStateCombinedSessionState);

How to develop multi-touch applications in Java?

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问题 Anticipating the day when multi-touch interfaces become more pervasive, are there libraries in Java that can be used for developing touch applications? I'm looking for interfaces similar to MouseListener / MouseMotionListener / MouseWheelListener. 回答1: The MT4j project has everything you need to develop multitouch applications in java. All the well known multitouch gestures are already built in and can be accessed as simple as listening to mouse events (for example: component

Touch Events not working with Google Maps in Angular

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问题 I am using Google Maps javascript API within an angular application. When using the app in Google Chrome on a regular desktop machine with a mouse, various navigation features (pan/zoom) work in the google maps part of the application just fine. However, when I try to use touch gestures on a windows 8.1 screen, the maps do not recognize any of the pan or zoom gestures. If I pinch to zoom, nothing happens. If I double tap on the screen like a mouse, then maps will zoom in. If I drag with a

android: difference between ACTION_UP and ACTION_POINTER_UP

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问题 from the android doc alone i dont really understand the difference between ACTION_UP and ACTION_POINTER_UP. http://developer.android.com/reference/android/view/MotionEvent.html#ACTION_DOWN basically i want to capture the event when one finger is released from the screen (even if another one may still be touching it) thanks! 回答1: I believe it stemmed from Multi-touch being added in, ACTION_UP has been in since API Level 1, but ACTION_POINTER_UP was added in API Level 5 when multi-touch was

Observing pinch multi-touch gestures in a UITableView

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I am looking to implement a pinch in/out on top of a UITableView, I have looked at several methods including this one: Similar question But while I can create a UIViewTouch object and overlay it onto my UITableView, scroll events are not being relayed to my UITableView, I can still select cells, and they respond properly by triggering a transition to a new ViewController object. But I can not scroll the UITableView despite passing the touchesBegan, touchesMoved, and touchesEnded events. This seems to be a classic problem. In my case I wanted to intercept some events over a UIWebView which can

Extending Functionality of Magic Mouse: Do I Need a kext?

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问题 I recently purchased a Magic Mouse. It is fantastic and full of potential. Unfortunately, it is seriously hindered by the software support. I want to fix that. I have done quite a lot of research and these are my findings regarding the event chain thus far: The Magic Mouse sends full multitouch events to the system. Multitouch events are processed in the MultitouchSupport.framework (Carbon) The events are interpreted in the framework and sent up to the system as normal events When you scroll

Android : Multi touch and TYPE_SYSTEM_OVERLAY

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问题 I am trying to get multiple touch events on a system overlay view, but am only receiving the MotionEvent.ACTION_OUTSIDE event. Is there any possible way of getting multiple touch events on a system overlay? Any examples or links would be very helpful. 回答1: To create an overlay view, when setting up the LayoutParams you need to set the type to TYPE_SYSTEM_OVERLAY and use the flag FLAG_WATCH_OUTSIDE_TOUCH . This presents a problem because as the Android documentation states: you will not