- Go to Solution Explorer
- Right-click on the Application name
- Select Add-->add new item
- Now in the window that opens, select an HTML page or new Web form
- Rename it to dragdropclippingregion.aspx
![dragndrop.gif]()
Step 2 : In this section we will create the style for the media and create the .css on the media screen. Put the given script in the Head section of the HTML or between the <head>--</head> tags. Here the CSS is used for design purposes.
CSS Script
<style>
body
{
margin: 0px;
padding: 0px;
}
Canvas
{
border: 2px solid #9C9898;
margin-top: 50px;
margin-left: 50px;
background-color: #009999;
box-shadow: 5px 5px 8px #222;
}
.title
{
text-align: center;
font-family: Segoe UI Light, Arial, Helvetica;
font-size: 2.2em;
margin: 1em;
}
.info
{
text-align: center;
font-family: Segoe UI Light, Arial, Helvetica;
font-size: 1.2em;
margin: 0.25em;
}
</style>
Step 3 : In this part we need to work on some JavaScript. To fully understand how JavaScript works, download the attached .rar file and run the canvasclippingregion application.
The whole JavaScript looks as in the following
window.onload = function ()
{
var stage = new Kinetic.Stage("container", 500, 200);
var layer = new Kinetic.Layer();
var draggingShape = undefined;
var draggingRectOffsetX = 0;
var draggingRectOffsetY = 0;
var box = new Kinetic.Shape({
drawFunc: function () {
var context = this.getContext();
context.beginPath();
context.rect(this._x, this._y, 200, 100);
context.fillStyle = "#ddd";
context.fill();
context.closePath();
},
_x: 100,
_y: 50
});
box.on("mousedown", function () {
draggingShape = this;
var mousePos = stage.getMousePosition();
draggingRectOffsetX = mousePos.x - box._x;
draggingRectOffsetY = mousePos.y - box._y;
});
box.on("mouseover", function () {
document.body.style.cursor = "pointer";
});
box.on("mouseout", function () {
document.body.style.cursor = "default";
});
layer.add(box);
var circle = new Kinetic.Shape({
drawFunc: function () {
var context = this.getContext();
context.beginPath();
context.rect(box._x, box._y, 200, 100);
context.clip();
context.beginPath();
context.arc(this._x, this._y, 50, 0, 2 * Math.PI, false);
context.fillStyle = "yellow";
context.fill();
context.closePath();
},
_x: 300,
_y: 50
});
Step 4 : In this section we are going to become familiar with the body part of HTML scripting. Replace this script from the body section of the dragdropclippingregion.aspx page. Here we pass a Canvas in the canvas tag.
<body style="background-color: #FFFFCC">
<center>
<h2>
Canvas Drag and Drop Region
</h2>
</center>
<hr />
<div id="container">
</div>
</body>
Step 5 : The complete code for the canvasclippingregion application:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="dragdropclippingregion.aspx.cs" Inherits="dragdropclippingregion" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<style>
</style>
<script src="jscript.js">
</script>
<script>
</script>
</head>
<body style="background-color: #FFFFCC">
<center>
<h2>
Canvas Drag and Drop Region
</h2>
</center>
<hr />
<div id="container">
</div>
</body>
</html>
Step 6 : Output Press F5
Note : For the accurate output of HTML5 applications, you must have the Google Chrome browser in your PC. You can move the rectangular shape as well as the circle when the application is running in the browser.
![dragndrop1.gif]()
After changing the rectangular and circle shape.
![dragndrop2.gif]()
Here are the some useful resources.
Drag and Drop Title in HTML 5
Working With Canvas Tag in HTML5
Drag and Drop in HTML 5
Drag-and-Drop Operation in Windows Forms and C#