touchpad with multi touch gesture support

From: http://book.51cto.com/art/201110/297453.htm 4.2.2 IOS multi-point touch and gesture IOS provided users with at least 3.5 inch broad perspectives, which was impressive at the time. On this stage, the fingers can beat flexibly. Before that, traditional touch-screen mobile phones can only use single fingers, and m

In the development of Android UI, we often encounter this requirement:Two components that support sliding, such as the ListView nested multiple Listview,listview item is a Viewpager or gallary? or ScrollView nested ScrollView and so on.In general, you may also need to support several features such as:¤ Two-layer components can slide¤ Do not let two components slide at the same time, or let two components sl

I recently wrote a windowphone application with the need for single touch and multi-touch control. such as click, double-click, swipe, two-finger swipe, etc., in this process encountered some problems, here to share my experience.First of all the various methods of Windowphone touch are summarized and analyzed, and I a

loaded correctly all Resources.ready (function);Subscribe for a determinate event$$ (". Tapquo"). On ("tap", function);//Trigger Custom event$$ (". Quojs"). Trigger (" Loaded ");//Loaded Page$$.ready (function () {alert (" Quojs rulz! ");});Gesture EventsAlthough the browser only supports touch events you have a lot of event quojs and gestures to help you make a usable project.Tap event, Common Event.tap (

Currently, capacitive touch screens are generally used for android phones. Therefore, multi-touch is basically supported. In android Systems, Applications can also use multi-touch events to fulfill various gestures and scenarios, the following describes how to use

1Click-UITapGestureRecognizeroverridefuncviewdidload () { super.viewdidload () letrect=cgrect (x:80,y:200,width:200,height:200); varview1=uiview (Frame:rect) view1.backgroundcolor=uicolor.redcolor () self.view.addsubview (View1) NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;//1, creating gesture recognizers vargesture=uitapgesturerecognizer (target:self,action: "viewAction:") # warning If you want the recognizer to recognize a variety of touches,

The previous article has already brought everybody to realize the free enlargement to reduce the picture, introduced the next matrix simply; Please refer to: Android to achieve gesture sliding multi-touch zoom translation Image effect, this article continues to improve our imageview. First add the amplification after the move. 1, free to move We are in the ont

Now in the app, the picture preview function must be indispensable, the user has basically formed conditioned reflex, see Small map, click to see big picture, see big figure two fingers begin to enlarge, enlarge, begin to move to the designated part.I. Overviewwant to do picture support multi-touch, free to zoom, translation, need to know a few knowledge points:

Simple multi-touch gesture Algorithm 1. Zoom action 1) detected dual-fingerDown event. The distance between the two fingers isolddistant; 2) calculate the distance between two fingers in real time when the two fingers movesampledistant; 3) Calculate the scaling ratio:zoom= sampledistant / olddistant; 4) Repeat2，Step 3An up event occurs. 2. Rotate action 1) d

the picture, to find the scaling limit value. /*** * Settings Display picture * * @Override public void Setimagebitmap (Bitmap bm) { super.setimagebitmap (BM); /** Get picture width high **/ bitmap_w = Bm.getwidth (); Bitmap_h = Bm.getheight (); Max_w = Bitmap_w * 3; Max_h = Bitmap_h * 3; Min_w = BITMAP_W/2; Min_h = BITMAP_H/2; } Then we get the initial l,t,r,b in the OnLayout method. @Override protected void OnL

Although I gave up the multi-touch application on the big screen, However, in my business description, many people need to operate this function at the same time. So I came up with the Support for Multiple mouse: Let's take a look at the next example: 1. Put two mouse s on your computer. If you are using a notebook, you can use the

mouse for the selection and drag operation, but for the shape of the free sketch and handwriting operation is not competent. We can write with a Tablet stylus, but it's hard to stretch or move. We are familiar with the touchscreen from ATM and museum outlets, but are usually limited to simple points and press operations. I think this technique, called multi-touch, represents a huge leap forward. As the na

Reprint Please specify source: http://blog.csdn.net/zhaokaiqiang1992The open source project that we are going to introduce to you today is the Photoview project from GitHub, the main function of this project is to achieve the reduction of the image of the common ImageView control, including single touch and multi touch.PhotoView's GitHub project address: Https://github.com/chrisbanes/PhotoViewThe directory

(R.layout.activity_main); img = (ImageView) Findviewbyid (r.id.img);D rawable drawable = Getresources (). getdrawable (R.drawable.ico); Img.setimagedrawable (drawable); attacher = new Photoviewattacher (IMG); attacher.update ();}}Let's say we're in the code behind. Used amimageview.setimagedrawable/setimagebitmap/setimageresource/and so on, we just need to call Attacher.update (). Demo: Https://github.com/ZhaoKaiQiang/PhotoViewDemo Copyright notice: This article Bo Master original articles, blo