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Shapes

Diagram provides support to add different kind of nodes. They are as follows:

  • Text node
  • Image node
  • HTML node
  • Native node
  • Basic shapes
  • Flow shapes

Text

Texts can be added to the diagram as text nodes. The shape property of the node allows you to set the type of node and for text nodes, it should be set as text. In addition, define the content object that is used to define the text to be added and style is used to customize the appearance of that text. The following code illustrates how to create a text node.

tagHelper
text.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Text", content= "Text" },
                    Style = new { color = "White", strokeColor = "None"}
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

Image

Diagram allows to add images as image nodes. The shape property of node allows you to set the type of node and for image nodes, it should be set as image. In addition, the source property of shape enables you to set the image source.

The following code illustrates how an image node is created.

tagHelper
image.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Image", source="/diagram/images/syncfusion.png" },
                    Style = new NodeStyleNodes() {  Fill="None"}
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

Note: Deploy your HTML file in the web application and export the diagram (image node) or else the image node will not be exported in the Chrome and Firefox due to security issues. Refer to the following link.

Link 1: http://asked.online/draw-images-on-canvas-locally-using-chrome/2546077/

Link 2: http://stackoverflow.com/questions/4761711/local-image-in-canvas-in-chrome

Image alignment

Stretch and align the image content anywhere but within the node boundary.

The scale property of the node allows to stretch the image as you desired (either to maintain proportion or to stretch). By default, the scale property of the node is set as meet. The following code illustrates how to scale or stretch the content of the image node.

tagHelper
scale.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Image", source="/diagram/images/syncfusion.png", scale="Meet" },
                    Style = new NodeStyleNodes() {  Fill="None"}
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

The following table illustrates all the possible scale options for the image node.

Values Images
None None Alignment
Meet Meet Alignment
Slice Slice Alignment
Stretch Stretch Alignment

HTML

Html elements can be embedded in the diagram through Html type node. The shape property of node allows you to set the type of node and to create a HTML node it should be set as HTML. The following code illustrates how an Html node is created.

tagHelper
HTML.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "HTML", content= "<div style='background:#6BA5D7;height:100%;width:100%;'><button type='button' style='width:100px'> Button</button></div>" },
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

Note: HTML node cannot be exported to image format, like JPEG, PNG, and BMP. It is by design, while exporting the diagram is drawn in a canvas. Further, this canvas is exported into image formats. Currently, drawing in a canvas equivalent from all possible HTML is not feasible. Hence, this limitation.

Native

Diagram provides support to embed SVG element into a node. The shape property of node allows you to set the type of node. To create a native node, it should be set as native. The following code illustrates how a native node is created.

tagHelper
native.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
        public partial class DiagramController: Controller {
            // GET: Nodes
            public ActionResult Nodes() {
                List < DiagramNode > nodes = new List < DiagramNode > ();
                nodes.Add(new DiagramNode() {
                        Id = "node1",
                            Width = 100,
                            Height = 100,
                            OffsetX = 100,
                            OffsetY = 100,
                            Shape = new {
                                type = "Native",
                                content = "<g xmlns=' http: //www.w3.org/2000/svg'> <g transform='translate(1 1)'><g>	   <path style='fill:#61443C;' d='M61.979,435.057c2.645-0.512,5.291-0.853,7.936-1.109c-2.01,1.33-4.472,             1.791-6.827,1.28 C62.726,435.13,62.354,435.072,61.979,435.057z'/><path style='fill:#61443C;'d='M502.469,502.471h-25.6c0.163-30.757-20.173-57.861-49.749-66.304 c-5.784-1.581-11.753-2.385-17.749-2.389c-2.425-0.028-4.849,0.114-7.253,0.427c1.831-7.63,2.747-15.45,2.731-23.296 c0.377-47.729-34.52-88.418-81.749-95.317c4.274-0.545,8.577-0.83,12.885-0.853c25.285,0.211,49.448,10.466,67.167,28.504 c17.719,18.039,27.539,42.382,27.297,67.666c0.017,7.846-0.9,15.666-2.731,23.296c2.405-0.312,4.829-0.455,7.253-0.427     C472.572,434.123,502.783,464.869,502.469,502.471z'/>		</g>	<path style='fill:#8B685A;' d='M476.869,502.471H7.536c-0.191-32.558,22.574-60.747,54.443-67.413    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                            }); ViewBag.nodes = nodes;


                    return View();
                }
            }
        }

Note: Like HTML node, the native node also cannot be exported to image format. Fill color of native node can be overridden by the inline style or fill of the SVG element specified in the template.

SVG content alignment

Stretch and align the svg content anywhere but within the node boundary.

The scale property of the node allows to stretch the svg content as you desired (either to maintain proportion or to stretch). By default, the scale property of node is set as meet. The following code illustrates how to scale or stretch the content of the node.

The following tables illustrates all the possible scale options for the node.

Values Images
None None SVG Content Alignment
Meet Meet SVG Content Alignment
Slice Slice SVG Content Alignment
Stretch Stretch SVG Content Alignment

Basic shapes

  • The Basic shapes are common shapes that are used to represent the geometrical information visually. To create basic shapes, the type of the shape should be set as basic. Its shape property can be set with any one of the built-in shape.

  • To render a rounded rectangle, you need to set the type as basic and shape as rectangle. Set the cornerRadius property to specify the radius of rounded rectangle.

The following code example illustrates how to create a basic shape.

tagHelper
basic.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Basic", shape = "Rectangle", cornerRadius = 10 },
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

Note: By default, the shape property of the node is set as basic.

Default property for shape is Rectangle.

Note: When the shape is not set for a basic shape, it is considered as a rectangle.

The list of basic shapes are as follows.

BasicShapes

Path

The Path node is a commonly used basic shape that allows visually to represent the geometrical information. To create a path node, specify the shape as path. The path property of node allows you to define the path to be drawn. The following code illustrates how a path node is created.

tagHelper
path.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Path", data = "M35.2441,25 L22.7161,49.9937 L22.7161,0.00657536 L35.2441,25 z M22.7167,25 L-0.00131226,25 M35.2441,49.6337 L35.2441,0.368951 M35.2441,25 L49.9981,25"
                    },
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

Flow Shapes

The flow shapes are used to represent the process flow. It is used for analyzing, designing, and managing for documentation process. To create a flow shape, specify the shape type as flow. Flow shapes and by default, it is considered as process. The following code example illustrates how to create a flow shape.

tagHelper
flow.cs
<ejs-diagram id="container" width="100%" height="700px" nodes="ViewBag.nodes">
</ejs-diagram>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Syncfusion.EJ2.Diagrams;
using System.Drawing;

namespace EJ2MVCSampleBrowser.Controllers.Diagram {
    public partial class DiagramController: Controller {
        // GET: Nodes
        public ActionResult Nodes() {
            List < DiagramNode > nodes = new List < DiagramNode > ();
            nodes.Add(new DiagramNode() {
                Id = "node1",
                    Width = 100,
                    Height = 100,
                    OffsetX = 100,
                    OffsetY = 100,
                    Shape = new { type = "Flow", shape = "DirectData" },
            });
            ViewBag.nodes = nodes;


            return View();
        }
    }
}

The list of flow shapes are as follows.

FlowShapes