javascript - Copy user selection from one canvas to another -

-

I am trying to implement a simple, select area on the canvas and then copying it to the area canvasab, Part I work has got the work done, but drawing of the copy area does not work. The idea is that the user will select an area and then that selection will appear on the second canvas, when they will end the selection, i.e. drag the mousewood, rectangular area, mouseup (appears to be copied)

I I agree a front end developer is not so much scared I am missing something about this thing how it works because I am trying to prove only one thing so that one Awadh I can prove Dana and understand the basics right now. JSFiddle is here -

HTML 

  & lt; Canvas ID = "Basic" width = 300 height = 300 & gt; & Lt; / Canvas & gt; & Lt; Canvas ID = "CopyBit" width = 300 height = 300 & gt; & Lt; / Canvas & gt;   
 javascript  
  var original = document.getElementById ("original"); var CTXoriginal = original.getContext ("2D"); var copybit = document.getElementById ("copybit"); var CTXcopybit = copybit.getContext ("2D"); Var background = new image (); Background src = "https://i.imgur.com/F1pJYM1.jpg"; Background.onload = function () {CTXoriginal.drawImage (background, 0, 0)} var imageData = CTXoriginal.getImageData (10, 10, 100, 100); CTXcopybitbit.ImageData (imageData, 0,0);   
 Any indicators appreciated.  
 C   
 
 <
  
  < P>  
  
  
       
 where S is source, and de destination is.  
 From there, you have to determine that click and drag to work co-ordinates and width / heights.  
 I updated your Bella to update it, it is very raw, so click somewhere in the upper left of the image, then click somewhere else at the bottom right.

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