Tools in Diagram Control
2 Mar 202324 minutes to read
Drawing tools
Drawing tool allows to draw any kind of node or connector during runtime by clicking and dragging on the diagram page.
Shapes
To draw a shape, set the JSON of that shape to the drawType property of the diagram and activate the drawing tool by using the tool property.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var drawingshape = { type: 'Basic', shape: 'Rectangle' };
var node = {
shape: drawingshape
};
diagram.drawingObject = node;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var node = {
id: "Path",
style: { fill: "#fbe172" },
annotations: [{
content: "Path"
}],
shape: {
type:'Path',
data: 'M13.560 67.524 L 21.941 41.731 L 0.000 25.790 L 27.120 25.790 L 35.501 0.000 L 43.882 25.790 L 71.000 25.790 L 49.061 41.731 L 57.441 67.524 L 35.501 51.583 z'
}
};
diagram.drawingObject = node;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Connectors
To draw connectors, set the JSON of the connector to the drawType property. The drawing tool can be activated by using the tool property.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var connectors = {
id: 'connector1',
type: 'Straight',
segments: [{ type: "polyline" }]
}
diagram.drawingObject = connectors;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Text
Diagram allows to create a textNode, when you click on the diagram page.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var node = {
shape: {
type: 'Text',
}
};
diagram.drawingObject = node;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Once you activate the TextTool, perform label editing of a node/connector.
Polygon shape
Diagram allows to create the polygon shape by clicking and moving the mouse at runtime on the diagram page.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var drawingshape = { type: 'Basic', shape: 'Polygon' };
//JSON to create a polygon
var node = {
shape: drawingshape
};
diagram.drawingObject = node;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Polyline Connector
Diagram allows to create the polyline segments with straight lines and angled vertices at the control points by clicking and moving the mouse at runtime on the diagram page.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var connector = { id: 'connector1', type: 'Polyline'};
diagram.drawingObject = connector;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Tool selection
There are some functionalities that can be achieved by clicking and dragging on the diagram surface. They are as follows.
- Draw selection rectangle: MultipleSelect tool
- Pan the diagram: Zoom pan
- Draw nodes/connectors: DrawOnce/DrawOnce
As all the three behaviors are completely different, you can achieve only one behavior at a time, based on the tool that you choose. When more than one of those tools are applied, a tool is activated based on the precedence given in the following table.
| Precedence | Tools | Description |
|---|---|---|
| 1st | ContinuesDraw | Allows you to draw the nodes or connectors continuously. Once it is activated, you cannot perform any other interaction in the diagram. |
| 2nd | DrawOnce | Allows you to draw a single node or connector. Once you complete the DrawOnce action, SingleSelect, and MultipleSelect tools are automatically enabled. |
| 3rd | ZoomPan | Allows you to pan the diagram. When you enable both the SingleSelect and ZoomPan tools, you can perform the basic interaction as the cursor hovers node/connector. Panning is enabled when cursor hovers the diagram. |
| 4th | MultipleSelect | Allows you to select multiple nodes and connectors. When you enable both the MultipleSelect and ZoomPan tools, cursor hovers the diagram. When panning is enabled, you cannot select multiple nodes. |
| 5th | SingleSelect | Allows you to select individual nodes or connectors. |
| 6th | None | Disables all tools. |
Set the desired tool to the tool property of the diagram model.
function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var connectors = {
id: 'connector1',
type: 'Straight',
segments: [{ type: "Straight" }]
}
diagram.drawingObject = connectors;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce | DiagramTools.ZoomPan;
diagram.dataBind();
}Events
elementDraw event is triggered when node or connector is drawn using drawing tool.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var connectors = {
id: 'connector1',
type: 'Straight',
segments: [{ type: "Straight" }]
}
diagram.drawingObject = connectors;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}Freehand Drawing
Diagram has support for free-hand drawing to draw anything on the diagram page independently. Free-hand drawing will be enabled by using the drawingObject property and setting its value to Freehand.
The following code illustrates how to draw a freehand drawing.
<ejs-diagram id="container" width="100%" height="700px" created="Created">
</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 > ();
List < DiagramNodeAnnotation > Node1 = new List < DiagramNodeAnnotation > ();
Node1.Add(new DiagramNodeAnnotation() {
Content = "node1", Style = new DiagramTextStyle() {
Color = "White", StrokeColor = "None"
}
});
nodes.Add(new Node() {
Id = "node1",
Width = 100,
Height = 100,
Style = new NodeStyleNodes() {
Fill = "darkcyan"
},
text = "node1",
OffsetX = 100,
OffsetY = 100,
Annotations = Node1
});
ViewBag.nodes = nodes;
return View();
}
}
public class Node: DiagramNode {
public string text;
}
}function Created() {
var diagram = document.getElementById("container").ej2_instances[0];
var connectors = {
id: 'connector1',
type: 'Freehand',
}
diagram.drawingObject = connectors;
//To draw an object once, activate draw once
diagram.tool = DiagramTools.DrawOnce;
diagram.dataBind();
}