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Adding canvas dynamically in GWT


Adding canvas dynamically in GWT

By : neradp
Date : November 22 2020, 11:17 AM
may help you . Solved the problem by adding fpCanvas.layout(); to the end of the method. My formpanel just had to be refreshed <.< ....
code :


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Adding a Border Dynamically to an Image on an HTML5 Canvas

Adding a Border Dynamically to an Image on an HTML5 Canvas


By : user121749
Date : March 29 2020, 07:55 AM
With these it helps Yes, all you have to do is draw a path outside the image and call ctx.stroke() to make the border.
So say the image has the coordinates x and y, with a width and height of w and h, you just do:
code :
ctx.rect(x, y, w, h);
ctx.stroke();
ctx.strokeStyle = 'blue';
ctx.lineWidth = 5;
Adding existing canvas to a div dynamically

Adding existing canvas to a div dynamically


By : user2803379
Date : March 29 2020, 07:55 AM
will help you I have a problem with adding existing canvas to a div dynamically via jQuery. Also I try numerous options to append this but any one works. , Four things:
create dynamically widgets python tkinter and adding scroll bar in canvas

create dynamically widgets python tkinter and adding scroll bar in canvas


By : Wolfian TR
Date : March 29 2020, 07:55 AM
With these it helps I am new in Python and stackoverFlow. I am trying to create Checkbox widget automatically from input first column CSV file. How can i get scroll bar in right position. The image below before input the CSV file, scroll bar in the right place , You have
code :
frameCheckBox.bind("<Configure>",self.resize(canvasScroll))
result = self.resize(canvasScroll)
frameCheckBox.bind("<Configure>", result)
frameCheckBox.bind("<Configure>", None)
frameCheckBox.bind("<Configure>", self.resize)
frameCheckBox.bind("<Configure>", lambda event: self.resize(canvasScroll))
Adding a node dynamically in d3 canvas

Adding a node dynamically in d3 canvas


By : user583947
Date : March 29 2020, 07:55 AM
I wish did fix the issue. There are a few thing at play with forces that aren't very obvious:
Upon initializing, the nodes in the original data array gain a bunch of new properties Upon initalizing, the links in the original data array are converted to a new form.
code :
{"source": "Montparnasse", "target": "Babet", "value": 2}
group: 1
id: "Myriel"
index: 0
vx: 0.0026819653036056477
vy: -0.0005005454729913666
x: 306.003096668046
y: 359.07887474183434
  function addNode () {
    var id = graph.nodes.length;
    graph.nodes.push({"id":id, index: id, x: width/2, y: height/2, vx: 0, vy: 0});
  }
  function addNode () {
    var id = graph.nodes.length;
    graph.nodes.push({"id":id, group: 12, x: width/2, y: height/2});
    simulation.nodes(graph.nodes)
  }
{ source: "Napoleon", target: "Myriel", value: 1 }
index: 0
source: Object { id: "Napoleon", group: 1, index: 1, … } 
target: Object { id: "Myriel", group: 1, index: 0, … }
value: 1
  function addNode () {
    var id = graph.nodes.length;
    graph.nodes.push({"id": id, x: width/2, y: height/2});
    graph.links.push({source: "Javert", target: id });

  simulation
      .nodes(graph.nodes)
      .force("link")
      .links(graph.links);  
  }
Dynamically take Width and height of canvas image and also create another canvas using javascript on one page

Dynamically take Width and height of canvas image and also create another canvas using javascript on one page


By : sug
Date : March 29 2020, 07:55 AM
This might help you I am creating a canvas using javascript with a dynamic image. Now I want to take canvas's height and width dynamically depending on the image. And as well as create another canvas on same page. Here I am attaching my code. , Try this below code:
code :
 <!DOCTYPE html>
<html lang="en">
   <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta http-equiv="X-UA-Compatible" content="ie=edge">
      <title>Document</title>
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
      <script>
         var _puzzleWidth = 640;
         var _puzzleHeight = 480;
         var _stage;
         var _stage2;
         function init(){

         var canvas2 = document.createElement('canvas');
             canvas2.id = "CursorLayer2";

             var canvas = document.createElement('canvas');
             canvas.id = "CursorLayer";

             _stage = canvas.getContext('2d');
             canvas.style.border = "1px solid";

             _stage2 = canvas2.getContext('2d');
             canvas2.style.border = "1px solid";

             var img = new Image();
             var img1=new Image();

             img.onload = function(){
                canvas.width  = this.width;
                canvas.height = this.height;
                _stage.drawImage(img, 0, 0);
             }

             img1.onload = function(){
                 canvas2.width  = this.width;
                 canvas2.height = this.height;
                 _stage2.drawImage(img1,0,0);

             }

             img.src = "https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcTfSV9AGQi9c48oRysYiuSs9Bs4J3B2p4R3eh-z1hsS-Z01HD17";
             img1.src = "http://lorempixel.com/output/animals-q-g-640-480-3.jpg";

             var body = document.getElementsByTagName("body")[0];
             body.appendChild(canvas);

             var body1 = document.getElementsByTagName("body")[0];
             body1.appendChild(canvas2);
         }
      </script>
   </head>
   <body onload="init();"></body>
</html>
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