NSImage's drawingHandler and retina screens -

-

I understand that to use the following snippet to create images and to assign the contents of the layer of the view , The render block is executed automatically, then when the backing properties of the view were changed, i.e. the window was moved to or from the retina display. 

  [Size with NSI image image: Size is flipped: No drawing handler: ^ BOOL (NSRKR) {CGContextRef const context = NSGraphicsContext.currentContext.graphicsPort; .... back yes; }];   
 Inside this rendering block, I am trying for another NSIMage center standing. I want to focus it on focusing on the high resolution display, but non-retina does not want to fade on the screen. So I would like to know what is the way to know whether the image is being presented with content scalefactor.  
 It should really be straightforward, but I did not find even after the internet efforts and hours of searching to find out if the image is being provided for retina screen or not.   
 
 
 From:  
 
 CGContextRef  
 The preferred way of obtaining scaling information for the CGContext object is to call the conversion function:  
  deviceRect = CGContextConvertRectToDeviceSpace (reference, userArt);   
 Then you can divide  userRect.size.height  by  deviceRect.size.height . It works for implicitly scaled window references and clearly small bitmap references.   
 I do not really think you should count on the scale, though. I think converting the device space from your user space to your Drawing handler and an arbitrary root ( NSZeroPoint ), in a rescript created in both the  rect  parameters With the size and size of the image you are trying to center, adjust the origin of the latter mathematically to adjust it in the device space in the past. Using the result to integrate the result Then, convert it back to the user space. Drag the image into resultant texture.

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: < P> Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i
Read more

java - Why my included JSP file won't get processed correctly? -

-
I am trying to create Java web framework (and learning), and on the basis of 'Code Generator In the process of making the material view of the database in the process of development, I stumbled into a difficulty, which I do not know how to solve it. First of all, I want the following index.jsp : & lt; Body & gt; Use all pages to be created. & Lt;% @ include file = "header.jsp"% & gt; & Lt; Hours / & gt; & Lt;% @ included file = "body.jsp"%> & Lt; Hours / & gt; & Lt;% @ include file = "footer.jsp"% & gt; & Lt; / Body & gt; And, in body.jsp , I should have it like this: & lt; Jsp: include page = "$ {Application_modul}"%> Where application_modul is an attribute defined in its controller: request.setAttribute ("application_modul", "USER_ACCOUNT \\ ' View_user_account.jsp "); This file can be found properly, but the processed JSP does
Read more