iphone - Drawing by finger move responding slow in iPad -


below code working responding slow, not draw fast finger movement. think subview “testview” cause of basic requirement of application.

in homeview.h file 

iboutlet uiimageview *imgdraw; iboutlet uiview *testview;  @private     cgpoint currentpoint;     cgpoint previouspoint1;     cgpoint previouspoint2;

here i’m using testview sub view in homeview draw within testview , here imgdraw existing within testview.

in homeview.m file 

- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event  {     mouseswiped = yes;      uitouch *touch = [touches anyobject];        currentpoint = [touch locationinview:testview];      previouspoint2 = previouspoint1;     previouspoint1 = [touch previouslocationinview:self.view];     currentpoint = [touch locationinview:self.view];      // calculate mid point.     cgpoint mid1 = midpoint(previouspoint1, previouspoint2);      cgpoint mid2 = midpoint(currentpoint, previouspoint1);     uigraphicsbeginimagecontext(testview.frame.size);     [imgdrawalphapad.image drawinrect:cgrectmake(0, 0, self.testview.frame.size.width, self.testview.frame.size.height)];     cgcontextsetlinecap(uigraphicsgetcurrentcontext(), kcglinecapround);      //nslog(@"iphone");     //cgcontextsetlinewidth(uigraphicsgetcurrentcontext(), [appdelegate_iphone.strokewidth floatvalue]);     cgcontextsetlinewidth(uigraphicsgetcurrentcontext(), 2);     cgcontextsetrgbstrokecolor(uigraphicsgetcurrentcontext(), 1, 0, 0, 0.9);     cgcontextbeginpath(uigraphicsgetcurrentcontext());      //code smooth drawing.{#dr#-12/05/2012}     cgcontextmovetopoint(uigraphicsgetcurrentcontext(), mid1.x, mid1.y);      // use quadcurve key     cgcontextaddquadcurvetopoint(uigraphicsgetcurrentcontext(), previouspoint1.x, previouspoint1.y, mid2.x, mid2.y);       cgcontextstrokepath(uigraphicsgetcurrentcontext());     //cgcontextflush(uigraphicsgetcurrentcontext());      drawimage.image = uigraphicsgetimagefromcurrentimagecontext();     uigraphicsendimagecontext();     lastpoint = currentpoint; }  cgpoint midpoint(cgpoint p1, cgpoint p2) {     return cgpointmake((p1.x + p2.x) * 0.5, (p1.y + p2.y) * 0.5);    }


Comments

Post a Comment

Popular posts from this blog

java - Play! framework 2.0: How to display multiple image? -

i need display gallery of photos. here template: @(photos: list[photo]) @title = { <bold>gallery</bold> } @main(title,"photo"){ <ul class="thumbnails"> @for(photo <- photos) { <li class="span3"> <a href="#" class="thumbnail"> <img src="@photo.path" alt=""> </a> </li> } </ul> } and here controller method: public static result getphotos() { return ok(views.html.photo.gallery.render(photo.get())); } and here photo bean : @entity public class photo extends model { @id public long id; @required public string label; public string path; public photo(string path, string label) { this.path = path; this.label = label; } private static finder<long, photo> find = new finder<long, photo>( long.class, photo.class); public static list<phot...
Read more

gmail - Is there any documentation for read-only access to the Google Contacts API? -

i want read-only access user's google contacts. there stackoverflow member wanted this, , received following answer : yes, there is, use https://www.googleapis.com/auth/contacts.readonly scope , "view contacts". this exchange reference read-only access google contacts can find using google. simply using access token obtained attempt read usual google contacts api (i.e. https://www.google.com/m8/feeds ) fails insufficient permissions. similarly, using google contacts api on new target fails 404 errors (for example https://www.googleapis.com/auth/contacts.readonly/default/full ). is there documentation anywhere on how use api, or permissible way access google contacts api full read-write access?
Read more

php - Controller/JToolBar not working in Joomla 2.5 -

relevant code: jtoolbarhelper::custom('savecategories', 'save', '', 'save', false, false); ... <input type="hidden" name="controller" value="easyblogcontroller"> according can dig docs , own previous questions, should call savecategories() function in easyblogcontroller . i've tried setting value easyblog , easyblog.php (file name) current easyblogcontroller (class name). clicking on save button refreshes page. not redirect, echo or var_dump test code put in savecategories() function. var_dump ing jrequest::getvar('controller') , 'task' return correct values. creating controller object , using $controller->execute('task'); works. the values going depend on location of controller trying call, , have couple options here. typically there controller in base folder of component (likely components/com_easyblog) in file called controller.php , class name inside ...
Read more