gesture drawing app

need a real machine to test. Check the log information of the real machine. In changedTouches, the touch point data is stored sequentially, so the applet itself supports multi-touch gestures. Conclusion Imagine: Since the gesture of a applet supports multi-touch and relevant paths can be obtained, it is also feasible to calculate the related paths. Scenario: multi-touch interaction, finger drawing, etc. S

position (upper-left corner), or use Drawinrect toF. Drawing picturesUIImage *image =[UIImage imagenamed:@ "foo.jpg"];//UIImage *image = [[UIImage alloc] Initwithcontentsoffile: (NSString *) FullPath];//UIImage *image = [[UIImage alloc] Initwithdata: (NSData *) imageData];//Drawing with ContextUigraphicsbeginimagecontext (cgsize);//draw with Cgcontext functionsUIImage *myimage =Uigraphicsgetimagefromcurren

Before writing the article received a lot of praise, mainly to help everyone to learn the new ideas. Since the release of the first article, I began to prepare the second article, the final plan to start in 07v8, this article I can guarantee that you can learn a lot of ideas. Before want to prepare an example video, request a lot of manufacturers to authorize, but involved in the vulnerability information, the manufacturers are very rigorous, so the whole process does not have relevant practical

For the touch screen, its original message is nothing more than press, lift, move these several, we only need to simply overload Ontouch or set the touch listener Setontouchlistener can be processed. However, in order to improve the user experience of our app, sometimes we need to identify the user's gestures, and Android gives us the gesture recognition tool gesturedetector can be very helpful. Base Ges

Recognition in Activity:Copy codeThe Code is as follows: package noodies.blog.csdn.net;Import android. app. Activity;Import android. OS. Bundle;Import android. view. GestureDetector;Import android. view. MotionEvent;Public class GestureTestActivity extends Activity {Private GestureDetector mGestureDetector;@ OverridePublic void onCreate (Bundle savedInstanceState ){Super. onCreate (savedInstanceState );SetContentView (R. layout. main );MGestureDetect

three-finger drag and zoom). Most remain in the conceptual and exploratory stages. Problems caused by gesture manipulation 1. The invisible of the operation Can you operate it? How to operate? Results? IPhone: Slide from left to right on items such as mail, memo, etc. to delete the entry, but there is no such action on some of the other applications, and the user has no expectation. 2 lack of uniform specifications and design guidelines Each

corresponding file, so the installation method is a bit cumbersome in this I only provide links on the above has a detailed introduction, is only English, test the English level.Installation link http://phone.codeplex.com/releases/view/107923This is the installation instructions to install the NuGet after installing the Windows Phone Toolkit package method is to open the VS's in the Assembly manager ConsoleEnter Install-package Wptoolkit. Last install multilingual

//Show Next viewMviewflipper.shownext ();return true;74}All else if ((E2.getx ()-e1.getx ()) >distance)76 {77//Show Previous viewMviewflipper.showprevious ();return true;80}Bayi return false;82}83@Overrideonlongpress void (motionevent e)86 {/TODO auto-generated Method stub8889}90@OverrideOnscroll Public Boolean (Motionevent E1, motionevent E2,Distancex float, float distancey)94 {Up//TODO auto-generated method stub--return false;97}98@Overridepublic void Onshowpress (Motionevent e)101 {102//TODO

(swip.direction==uiswipegesturerecognizerdirectionleft) {NSLog (@ "picture movement");}}Rotation Gesture Method-(void) Rotationp: (Uirotationgesturerecognizer *) Rotationp{Rotationp.view.transform=cgaffinetransformrotate (RotationP.view.transform, rotationp.rotation);rotationp.rotation = 0;}Drag gesture Method-(void) Handlepan: (uipangesturerecognizer*) recognizer{Cgpoint translation = [recognizer Translat

; }Else if (angle >= -135 Angle -45) { result = 2; } Else if ((Angle >= 135 angle 180) | | (Angle >= -180 Angle -135)) { result = 3; } Returnresult; } //Sliding handling var startX, Starty; Document.addeventlistener (' touchstart ',function (ev) { StartX = ev.touches[0].pagex; Starty = ev.touches[0].pagey; }, false); Document.addeventlistener (' touchend ',function (ev) { var endx, EndY; EndX = ev.changedtouches[0].pagex; EndY = ev.chang

Use a simple drawing app to illustrate Android's graphics-processing class with its own view-defining application.For example, there is an app for users to draw and doodle at their own discretion.It's not so fancy here, it's only available in black and white. But it can change the thickness of the nib.Essentially the eraser here is a white brush, without using th

First, the Android side of the lagThe Android app is prone to lag during specific use, such as having a meal when viewing a page, a slow response after switching tabs, or a slow operation when it comes to sliding.Second, the reasons for the lagThere may be many reasons for the lag, such as:1. High CPU2. Memory Overflow3. Main thread processing IO operation, etc....Where over-drawn, is an easy to ignore but also best to modify and can see the effect of

supports the brush, such as spritevisual. Remember, be sure to set the object's Size property , because the default value is 0, otherwise it will not be displayed, here, I directly with an expression animation, let its size follow the size of the Canvas.This method is encapsulated so that it can be called in the appropriate place to draw the content, such as in the constructor of the page class. Public MainPage () { this. InitializeComponent (); drawsomethin

them, Nnibsize is what I call a dot pixel (100*100). An example would be clearer:* My device is 5.7inch, resolution is 1920*1080 (PX), calculate the device PPIThis is to get my device PPI. And my device was filed near the drawable? I debug my Code, I found 800*800 picture placed under-HDPI, get the size of the figure for 1467*1467, why this is the value. In the above code, I obtained a nearest pixel density, found that dm.density obtained a value of 2.75, that is, our 386 pixel density near the

Drag a polygon from the toolbar, draw a hexagon, press and hold down the shortcut key to reduce the number of sides of the polygon, thus drawing a triangle, fill the color. Select a triangle with the selection tool to change the shape of the triangle by stretchingHover the cursor over the corner of the triangle, and an arc will rotate the moving triangle.Overlap The two triangles and place the inverted triangles at the top level. If the inverted trian

(image:didFinishSavingWithError:contextInfo:), nil);}-(void) Image: (UIImage *) image didfinishsavingwitherror: (nserror *) error ContextInfo: (void *) ContextInfo{if (Error) {[Mbprogresshud showerror:@ "Save failed, please check if the app has access to the album"];} else {[Mbprogresshud showsuccess:@ "save Success"];}}8. Create a new class for Captureview(used to, only need to send in the required view)In the CaptureView.h+ (UIImage *) Captureimage

; pathfigure> pathfigurecollection> pathgeometry.figures> pathgeometry> geometrygroup> path.data> Path> This picture took me a long time, I hope you will also draw, although the role is not small, but it is good to spend fun.I've probably added some markup on the graph, and the RectangleGeometry rect attribute has 2 va

as the rectangle we were allow to draw on. * We do this to chache the bitmap so We don ' t need to * Recreate it each time draw () is called since it * Takes a few milliseconds. */ private void Generatepatternbitmap () { if (getbounds (). Width () 0 | | getbounds (). Height () 0) { return; } Mbitmap = Bitmap.createbitmap (GetBounds (). Width (), getbounds (). Height (), config.argb_8888); Canvas canvas = new Canvas (MBITMAP); Rect r = new Rect (); Boolean