Collaborative drawing with MindFusion.Diagramming and SignalR

In this post we’ll show how to use the ASP.NET MVC diagram library and SignalR to implement collaborative drawing of diagrams. This can be useful in visual planning tools where users work together on a task, such as project management or mind-mapping applications.

The complete sample project is available here –
CollabMindMap.zip

Start by creating an ASP.NET MVC application in Visual Studio. Open Tools -> Library Package Manager -> Package Manager Console and install the MindFusion.Diagramming.Mvc package –

Install-Package MindFusion.Diagramming.Mvc 

While we are there, also install the SignalR package –

install-package Microsoft.AspNet.SignalR

From the project’s context menu, Add submenu, select OWIN startup class and add SignalR to the OWIN pipeline by calling –

app.MapSignalR();

Now lets add a diagram view to the home page at Views/Home/Index.cshtml, load the necessary script files and wire up diagram event handlers that will send change notifications to the hub –

@using MindFusion.Diagramming
@using MindFusion.Diagramming.Mvc

@{
    var diagView = new DiagramView("diagramView")
        .NodeCreatedScript("onNodeCreated")
        .NodeModifiedScript("onNodeModified")
        .NodeTextEditedScript("onNodeTextEdited")
        .LinkCreatedScript("onLinkCreated")
        .LinkModifiedScript("onLinkModified")
        .LinkTextEditedScript("onLinkTextEdited")
        .ControlLoadedScript("onDiagramLoaded")
        .SetAllowInplaceEdit(true);

    diagView.Diagram.DefaultShape = Shapes.Ellipse;
}

@Html.DiagramView(diagView, new { style = "width:700px; height:600px;" })

@section scripts
{
    @Scripts.Render("~/Scripts/jquery.signalR-2.0.0.js")
    @Scripts.Render("~/Scripts/MindMap.js")
    @Scripts.Render("~/signalr/hubs")
}

The hub will synchronize operations done on the diagram by one client by sending a notification to all other connected clients. From the project context menu add a SignalR hub class, naming it DiagramHub. The model class we’ll use to describe node changes looks like this –

public class NodeModel
{
    [JsonProperty("x")]
    public double X { get; set; }

    [JsonProperty("y")]
    public double Y { get; set; }

    [JsonProperty("width")]
    public double Width { get; set; }

    [JsonProperty("height")]
    public double Height { get; set; }

    [JsonProperty("id")]
    public string Id { get; set; }

    [JsonProperty("text")]
    public string Text { get; set; }
}

Add these three methods to the hub class to synchronize node creation, move, resize and edit-text operations –

public void NodeCreated(NodeModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).nodeCreated(clientModel);
}
public void NodeModified(NodeModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).nodeModified(clientModel);
}
public void NodeTextEdited(NodeModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).nodeTextEdited(clientModel);
}

The diagram event handlers in MindMap.js fill in the model objects and call respective hub methods –

function onNodeCreated(s, e)
{
    var hubId = $.connection.hub.id;
    e.node.id = hubId + s.getItems().length;

    var r = e.node.bounds;
    var model =
    {
        id: e.node.id,
        x: r.x,
        y: r.y,
        width: r.width,
        height: r.height
    };
    
    diagramHub.server.nodeCreated(model);
}

function onNodeModified(s, e)
{
    var r = e.node.bounds;
    var model =
    {
        id: e.node.id,
        x: r.x,
        y: r.y,
        width: r.width,
        height: r.height
    };
    diagramHub.server.nodeModified(model);
}

function onNodeTextEdited(s, e)
{
    var model =
    {
        id: e.node.id,
        text: e.getNewText()
    };
    diagramHub.server.nodeTextEdited(model);
}

Handle notifications sent from server to clients by updating the diagram from received model objects –

$(function ()
{
    diagramHub = $.connection.diagramHub;
    diagramHub.client.nodeCreated = function (model)
    {
        var node = diagram.factory.createShapeNode(
            model.x, model.y, model.width, model.height);
        node.id = model.id;
    };
    diagramHub.client.nodeModified = function (model)
    {
        var node = findNode(model.id);
        node.setBounds(
            new MindFusion.Drawing.Rect(
                model.x, model.y, model.width, model.height),
            true);
    };
    diagramHub.client.nodeTextEdited = function (model)
    {
        var node = findNode(model.id);
        node.setText(model.text);
    };
    $.connection.hub.start();
});

Finally add these helper functions for finding items and storing a global diagram reference –

function onDiagramLoaded(s, e)
{
    diagram = s;
}

function findNode(id)
{
    for (var i = 0; i < diagram.nodes.length; i++)
    {
        var node = diagram.nodes[i];
        if (id == node.id)
            return node;
    }
    return null;
}

function findLink(id)
{
    for (var i = 0; i < diagram.links.length; i++)
    {
        var link = diagram.links[i];
        if (id == link.id)
            return link;
    }
    return null;
}

Start several copies of the application in separate browser instances on your system (or even on different machines if you publish it on IIS or Azure). Now start drawing nodes, moving them or editing their text – changes done on the diagram in one browser will be immediately reflected in all other browsers connected to the hub. However we aren’t yet synchronizing link operations; lets fix that –

public class LinkModel
{
    [JsonProperty("id")]
    public string Id { get; set; }

    [JsonProperty("originId")]
    public string OriginId { get; set; }

    [JsonProperty("destinationId")]
    public string DestinationId { get; set; }

    [JsonProperty("text")]
    public string Text { get; set; }
}

Add following hub methods in server class –

public void LinkCreated(LinkModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).linkCreated(clientModel);
}
public void LinkModified(LinkModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).linkModified(clientModel);
}
public void LinkTextEdited(LinkModel clientModel)
{
    Clients.AllExcept(Context.ConnectionId).linkTextEdited(clientModel);
}

Call them from respective JavaScript handlers of diagram link events –

function onLinkCreated(s, e)
{
    var hubId = $.connection.hub.id;
    e.link.id = hubId + s.getItems().length;

    var model =
    {
        id: e.link.id,
        originId: e.link.getOrigin().id,
        destinationId: e.link.getDestination().id,
    };
    
    diagramHub.server.linkCreated(model);
}

function onLinkModified(s, e)
{
    var hubId = $.connection.hub.id;
    var model =
    {
        id: e.link.id,
        originId: e.link.getOrigin().id,
        destinationId: e.link.getDestination().id,
    };
    diagramHub.server.linkModified(model);
}

function onLinkTextEdited(s, e)
{
    var model =
    {
        id: e.link.id,
        text: e.getNewText()
    };
    diagramHub.server.linkTextEdited(model);
}

Handle link-related client notifications by creating or modifying links –

diagramHub.client.linkCreated = function (model)
{
    var link = diagram.factory.createDiagramLink(
        findNode(model.originId), findNode(model.destinationId));
    link.id = model.id;
};
diagramHub.client.linkModified = function (model)
{
    var link = findLink(model.id);
    link.setOrigin(findNode(model.originId));
    link.setDestination(findNode(model.destinationId));
};
diagramHub.client.linkTextEdited = function (model)
{
    var link = findLink(model.id);
    link.setText(model.text);
};

Now the application will also synchronize link operations across all connected clients. Here’s a small diagram synchronized between three different browsers –
collaborative mind map

The sample above uses MindFusion’s ASP.NET MVC API. Code for other frameworks will look similar as MindFusion maintains same diagramming model for multiple platforms. You can download the trial version of any MindFusion.Diagramming component from this page.

Enjoy!

JavaScript Diagram Library, V2.8 Released

The new JavaScript library has been released with the following new features:

Fluent API

Builder objects with property setters and shortcut methods for font and brush creation add support for fluent programming style. Static With and instance init methods in DiagramItem, Style and Layout -derived classes return a builder instance that can be used to set up respective new or existing objects.

DiagramLink improvements

  • HeadStroke, HeadStrokeThickness and HeadStrokeDashStyle properties let you customize arrowhead strokes independently of line segments strokes.
  • The AllowSelfLoops property of Diagram class controls whether users are allowed to draw self-loop links.
  • The new Spline element of LinkShape enumeration draws links as interpolating splines that pass through all of their control points.
The new JS Diagram boasts improved DiagramLink-s.

The new JS Diagram boasts improved DiagramLink-s.

Miscellaneous

A trial version is available for download here:

Download MindFusion Diagram Library for JavaScript, V2.8

About Diagramming for JavaScript Library: Written 100% in JavaScript, this tool is a dynamic, browser based visualization library that uses HTML5 Canvas to draw impressive diagrams, schemes, flowcharts, trees and many more. It is browser independent, easy to use and allows you to integrate interactive diagrams for JavaScript and HTML into any web application. This MindFusion graphing library supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The library boasts an elegant API, which is documented in details, numerous step-by-step guides and tutorials. The Diagramming API also provides TypeScript definitions. Various samples are provided to let you learn quickly how to use the most important features of the library – check them here. The JavaScript diagram builder is not only the perfect choice for creating any type of diagram in the browser – it can also arrange it the way you wish with a mouse click using one of its automatic graph layout algorithms. For more details about the features of the component, please visit the Diagram for JavaScript page.

Lane diagram in JavaScript

In this post we will show how to use the JavaScript diagram library to create a lane diagram. The complete example is available here:

Lanes.zip

Create a new HTML page and add references to the jQuery library and to the MindFusion.Diagramming library:

<script src="jquery.min.js" type="text/javascript"></script>
<script src="MindFusion.Common.js" type="text/javascript"></script>
<script src="MindFusion.Diagramming.js" type="text/javascript"></script>

Create shortcuts to some classes from the diagram model:

var Events = MindFusion.Diagramming.Events;
var Diagram = MindFusion.Diagramming.Diagram;
var AnchorPattern = MindFusion.Diagramming.AnchorPattern;
var AnchorPoint = MindFusion.Diagramming.AnchorPoint;
var Alignment = MindFusion.Diagramming.Alignment;
var MarkStyle = MindFusion.Diagramming.MarkStyle;
var Style = MindFusion.Diagramming.Style;
var Theme = MindFusion.Diagramming.Theme;
var LinkShape = MindFusion.Diagramming.LinkShape;
var Shape = MindFusion.Diagramming.Shape;
var LaneGrid = MindFusion.Diagramming.Lanes.Grid;
var LaneHeader = MindFusion.Diagramming.Lanes.Header;
var LaneStyle = MindFusion.Diagramming.Lanes.Style;
var Rect = MindFusion.Drawing.Rect;
var Point = MindFusion.Drawing.Point;
var HandlesStyle = MindFusion.Diagramming.HandlesStyle;

Next, add a canvas the the page and create a diagram from it by using the Diagram.create() method:

diagram = Diagram.create($("#diagram")[0]);

You can obtain a reference to the diagram lane grid by calling the Diagram.getLaneGrid() method. You can use the returned object to add rows and columns to the grid and customize its appearance. Finally, to display the grid, call Diagram.setShowLaneGrid(). The customization is omitted here for brevity, but the full code is available in the associated sample project.

The lane grid implies some restrictions to the node and links inside of it. For example, the nodes can be moved only inside the row lanes of the grid. To enforce those restrictions, we will handle several diagram events:

diagram.addEventListener(Events.nodeCreated, onNodeCreated);
diagram.addEventListener(Events.nodeModified, onNodeModified);
diagram.addEventListener(Events.linkCreated, onLinkCreated);

In the nodeCreated event handler, get the gird cell at the top left of the node’s bounding rectangle and align the node to this cell:

function onNodeCreated(sender, e) {
    var node = e.getNode();
    node.setAnchorPattern(pattern);
    node.setHandlesStyle(HandlesStyle.HatchHandles3);

    // Place the box within the grid
    var bounds = node.getBounds();
    var topLeft = new Point(bounds.x, bounds.y);

    var cellBoundsReciever = {};
    if (!grid.getCellFromPoint(topLeft, cellBoundsReciever))
        return;
    var cellBounds = cellBoundsReciever.cellBounds;

    var pixel = 1;

    bounds.y = cellBounds.y + pixel;
    bounds.height = cellBounds.height - 2 * pixel;
    node.setBounds(bounds);
}

Similar rules can be applied to the links in the linkCreated event handler.

The following image illustrates the grid in action:

JavaScript Swimlane Diagram

For more information on MindFusion JavaScript diagram library, see its help reference and overview page.

Enjoy!

Class inheritance diagram in JavaScript

In this post we will show how to use the JavaScript diagram library to generate a class inheritance diagram. The complete example is available here:

InheritanceDiagram.zip

and a live version here:

http://mindfusion.eu/demos/jsdiagram/Inheritance.html

Let’s start by creating shortcuts to some classes from the diagram model:

var Diagram = MindFusion.Diagramming.Diagram;

var DiagramItem = MindFusion.Diagramming.DiagramItem;
var DiagramLink = MindFusion.Diagramming.DiagramLink;
var DiagramNode = MindFusion.Diagramming.DiagramNode;
var ShapeNode = MindFusion.Diagramming.ShapeNode;
var TableNode = MindFusion.Diagramming.TableNode;
var ContainerNode = MindFusion.Diagramming.ContainerNode;
var FreeFormNode = MindFusion.Diagramming.FreeFormNode;
var SvgNode = MindFusion.Diagramming.SvgNode;

var ScrollBar = MindFusion.Diagramming.ScrollBar;
var Rect = MindFusion.Drawing.Rect;
var Font = MindFusion.Drawing.Font;
var TreeLayout = MindFusion.Graphs.TreeLayout;

Next, create a function that takes a Diagram instance and a list of class names as parameters. It will create a TableNode for each class. Each property of the class prototype is listed in a TableNode cell. If the getBaseType function detects a class inherits another one from the list, we’ll create a link between their nodes. Finally, the diagram is arranged using the TreeLayout algorithm.

function createClassDiagram(diagram, classes)
{
    var classConstructors = [];

    // create a table node for each class
    for (var i = 0; i < classes.length; i++)
    {
        var className = classes[i];
        var node = diagram.getFactory().createTableNode(20, 20, 42, 42);
        node.redimTable(1, 0);
        node.setText(className);
        node.setBrush("white");
        node.setCaptionBackBrush("lightgray");
        node.setCaptionFont(
            new Font("sans-serif", 3, true /*bold*/, true /*italic*/));
        node.setScrollable(true);

        var ctor = eval(className);
        for (var property in ctor.prototype)
        {
            node.addRow();
            node.getCell(0, node.rows.length - 1).setText(property);
        }
        classConstructors.push(ctor);
        ctor.classNode = node;
    }
	
    // create a diagram link for each prototype inheritance
    classConstructors.forEach(function(ctor)
    {
        var base = getBaseType(ctor);
        if (base && base.classNode)
        {
            var link = diagram.factory.createDiagramLink(
                base.classNode,
                ctor.classNode);
            link.setHeadShape(null);
            link.setBaseShape("Triangle");
            link.setBaseShapeSize(3);
        }
    });

    // arrange as a tree
    var treeLayout = new TreeLayout();
    treeLayout.linkType = MindFusion.Graphs.TreeLayoutLinkType.Cascading;
    diagram.arrange(treeLayout);
}

The getBaseType implementation checks if a class was registered as a base for the argument using MindFusion.registerClass method or the common prototype inheritance pattern.

function getBaseType(ctor)
{
    // if class registered using MindFusion.registerClass
    if (ctor.__baseType)
        return ctor.__baseType;

    // if  prototypical inheritance with Child.prototype = new Parent()
    if (ctor.prototype && ctor.prototype.constructor != ctor)
        return ctor.prototype.constructor;
	
    return null;
}

The ready handler creates a Diagram instance binding it to a #diagram canvas element. It then calls createClassDiagram with a list of DiagramItem -derived classes as argument:

$(document).ready(function ()
{
    TableNode.prototype.useScrollBars = true;
    ScrollBar.prototype.background = "Lavender";
    ScrollBar.prototype.foreground = "DarkGray";

    // create a Diagram component that wraps the "diagram" canvas
    var diagram = Diagram.create($("#diagram")[0]);

    createClassDiagram(diagram,
    [
        "DiagramItem",
        "DiagramLink",
        "DiagramNode",
        "ShapeNode",
        "TableNode",
        "ContainerNode",
        "FreeFormNode",
        "SvgNode"
    ]);
});

If you run the sample now, you should see this nice visualization of MindFusion classes 🙂

JavaScript class inheritance diagram

For more information on MindFusion JavaScript diagram library, see its help reference and overview page.

Enjoy!

Node.js diagram module

MindFusion.Diagramming for JavaScript is now also available as a Node.js module, and you can use the diagram API you know and love in server code 🙂 A sample server application and the module script are available here:

diagram_nodejs.zip

For example, you can submit to server a diagram drawn interactively by the user and examine its contents there by iterating over the nodes and links members of the Diagram class:

// on client side
$.ajax(
{
	type: "post",
	url: "http://localhost:1234/diagram", 
	contentType: "application/json",
	data: diagram.toJson(),
	success: function(data)
	{
		console.log('success');
	},
	error: function(jqXHR, textStatus, err)
	{
		console.log(err);
	}
});

// on server side
app.post('/diagram', function(req, res)
{
    // won't be required in final release
    var dummyCanvas = { parentNode:{} };

    // create Diagram instance
    var diagram = new Diagram(dummyCanvas);

    // load diagram elements drawn by user
    diagram.fromJson(req.rawBody);

    // examine diagram contents
    console.log(diagram.nodes.length + " nodes");
    console.log(diagram.links.length + " links");
    diagram.nodes.forEach(function (node, index)
    {
        console.log("node " + index + ": " + node.getText());
    });

    // send some response
    res.send('ok');
});

Or you could build the diagram on server side and send it to the browser to render in client-side Diagram control:

// on server side
app.get('/diagram', function(req, res)
{
    // won't be required in final release
    var dummyCanvas = { parentNode:{} };

    // create Diagram instance
    var diagram = new Diagram(dummyCanvas);

    // create some diagram items
    var node1 = diagram.getFactory().createShapeNode(10, 10, 40, 30);
    var node2 = diagram.getFactory().createShapeNode(60, 10, 40, 30);
    var link = diagram.getFactory().createDiagramLink(node1, node2);

    // set nodes' content
    node1.setText("node.js");
    node1.setBrush("orange");
    node2.setText("hello there");

    // send diagram json
    res.send(
        diagram.toJson());
});

// on client side
$.ajax(
{
	type: "get",
	url: "http://localhost:1234/diagram", 
	success: function(data)
	{
		diagram.fromJson(data);
	},
	error: function(jqXHR, textStatus, err)
	{
		console.log(err);
	}
});

To run the sample Node.js application, run “node server.js” from command line and open http://localhost:1234/client.html in your browser. Draw some nodes and links, edit their text and click Post to see them enumerated in Node’s console. Clicking the Get button will show this diagram built on server side:

diagram built in node.js

For more information on MindFusion’s JavaScript Diagram API, see MindFusion.Diagramming online help

Enjoy!

Diagramming for JavaScript, V2.5

The new release of MindFusion Diagramming library for JavaScript contains some useful new features and improvements. Below are the details:

Resize of table columns and rows

Columns and rows of a TableNode can now be resized interactively if its AllowResizeColumns or AllowResizeRows properties are enabled. In order to resize, move the mouse pointer to the border line on column’s right side or row’s bottom side until it shows resize cursor and start dragging. The control raises tableColumnResizing and tableRowResizing events to let you validate new size or prevent resizing some elements. The tableColumnResized and tableRowResized events are raised after the operation completes.

JavaScript Table Nodes: Resize

JavaScript Table Nodes: Resize

Shape libraries

The ShapeLibrary class lets you use custom geometric shapes created using MindFusion ShapeDesigner tool. Call its loadFromXml method to load a library XML file. getShapes returns an array of the loaded Shape objects. The ShapeLibraryLocation property of NodeListView creates a prototype ShapeNode object for each shape from the specified library.

Miscellaneous

  • TextStroke and TextStrokeThickness properties of DiagramItem let you set color and thickness of text outlines.
  • Items can now be deleted using Backspace key when running on Mac.
  • Caption divider line in TableNode and ContainerNode is now rendered clipped when caption height is smaller than corner radius.
  • The TooltipDelay property specifies the delay in milliseconds before showing tooltips.
  • The Orientation property of NodeListView lets you set the view’s orientation to Horizontal or Vertical .
  • MindFusion.Common.js contains code shared with other JavaScript libraries by MindFusion. It must be loaded before the MindFusion.Diagramming.js script.

Fixed bugs

  • Fixed overlaps in TreeLayout when arranging nodes of different sizes.
  • Anchor points indices were not serialized and could be reset to different values when loading from JSON.
  • Deserialization of custom item classes worked correctly only if their names contained Node or Link suffix.

Registered customers with an active upgrade subscription can download the licensed version from the clients area on our site.

A trial version is available for direct download from the following link:

Download MindFusion Diagramming Library for JavaScript, V2.5

We are glad to receive any comments, suggestions and feedback. You can write us at e-mail support@mindfusion.eu or use the help desk. You can use the JsDiagram section on MindFusion forum to post questions about the tool.

About Diagramming for JavaScript Library: Written 100% in JavaScript, this tool uses HTML5 Canvas to draw impressive diagrams, schemes, flowcharts, trees and many more. It is browser independent, easy to use and integrate into any web application. JsDiagram supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The tool boasts an elegant API, which is documented in details as well numerous step-by-step guides and tutorials. Various samples are provided to let you learn quickly how to use the most important features of the library – check them here. JsDiagram is not only the perfect choice for creating any type of diagram in the browser – it can also arrange it the way you wish with a mouse click using one of its automatic graph layout algorithms. For more details about the features of the component, please visit the Diagram for JavaScript page.

Diagramming for JavaScript, V2.4

The new version of Diagramming for JavaScript library is out! Here is an overview of the new features:

Appearance improvements

  • You can now set the Shape property of tables and containers to RoundedRectangle and render them with rounded corners.
  • It is possible to hide the frames of table cells by setting the CellFrameStyle property to None.
  • You can now set the EnableStyledText property of TableNode class to render styled text in tables.
JavaScript Diagram Library: Table Nodes

JavaScript Diagram Library: Table Nodes

New events

  • The control raises cellTextEdited event when users edit the text of table cells.
  • The createEditControl event lets you create custom DOM element or fragment to use as in-place text editor.
  • NodeListView raises nodeSelected event when the user selects a node.

Miscellaneous

  • jQuery mode is now the default and all sample projects have been updated to use jQuery. To continue using the Microsoft Ajax library, set MindFusionImpl = “MsAjax” before loading Diagramming.js
  • the loadFromXml method of Diagram class lets you load XML files created by MindFusion diagram controls for other platforms.
  • fixed setZoomFactorPivot bug in virtual scroll mode.

Registered customers with an active upgrade subscription can download the licensed version from the clients area on our site.

A trial version is available for direct download from the following link:

Download MindFusion Diagramming Library for JavaScript, V2.4

We are glad to receive any comments, suggestions and feedback. You can write us at e-mail support@mindfusion.eu or use the help desk. You can use the JsDiagram section on MindFusion forum to post questions about the tool.

About Diagramming for JavaScript Library: Written 100% in JavaScript, this tool uses HTML5 Canvas to draw impressive diagrams, schemes, flowcharts, trees and many more. It is browser independent, easy to use and integrate into any web application. JsDiagram supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The tool boasts an elegant API, which is documented in details as well numerous step-by-step guides and tutorials. Various samples are provided to let you learn quickly how to use the most important features of the library – check them here. JsDiagram is not only the perfect choice for creating any type of diagram in the browser – it can also arrange it the way you wish with a mouse click using one of its automatic graph layout algorithms. For more details about the features of the component, please visit the Diagram for JavaScript page.

Diagramming for JavaScript, V2.3

We are happy to share the newly added features to the latest version of MindFusion JavaScript diagramming library:

Styled text in nodes
You can use HTML-like formatting tags with the ShapeNode.EnableStyledText and apply various attributes to the node’s text. Currently JsDiagram supports:

  • <b> specifies bold text
  • <i> specifies italic text
  • <u> specifies underlined text
  • <color=value> specifies text color
  • <br /> specifies line break
Diagramming for JavaScript Library: Styled Text

Diagramming for JavaScript Library: Styled Text

Text rendering improvements

  • We have greatly improved the general text rendering quality. The component now removes scale transformations applied for MeasureUnit and ZoomFactor before drawing text on the canvas, and instead specifies a scaled font size, which helps improve text appearance in Firefox and older versions of Chrome.
  • You can draw the items’ text underlined. To enable this, set the underline attribute of the Font class.
  • You can specify Font styles via the Style instance by calling its setFontStyle() method with a combination of MindFusion.Drawing.FontStyle enumeration members (Bold, Italic, Underline).

Miscellaneous

  • You can draw items with dashed lines in browsers that support the setLineDash function. To enable this, set the StrokeDashStyle property of DiagramItem or Style to a member of the MindFusion.Drawing.DashStyle enumeration (Solid, Dash, Dot, DashDot, DashDotDot).
  • TreeLayout supports organizational charts with assistant nodes as in Microsoft Office diagrams. To mark nodes as assistants, set node.getLayoutTraits().treeLayoutAssistant to a member of the MindFusion.Graphs.AssistantType enumeration (Normal, Left, Right). Set treeLayout.enableAssistants = true; to arrange assistant nodes in a separate branch between the main node levels.
  • You can specify if separate connected components of a graph should be arranged horizontally or vertically relatively to each other by setting the multipleGraphsPlacement attribute of layout classes.
  • The type of LinkLabel.Margin property has been changed from number to Thickness, letting you specify different margin sizes at each side of the label.

You can download the trial version directly from the following link:

Download Diagramming for JavaScript, V2.3 Trial Version

We shall be glad to receive any comments, suggestions and feedback. You can write us at e-mail support@mindfusion.eu or use the help desk. You can use the JsDiagram section on MindFusion forum to post questions about the tool.

About Diagramming for JavaScript Library: Written 100% in JavaScript, this tool uses HTML5 Canvas to draw impressive diagrams, schemes, flowcharts, trees and many more. It is browser independent, easy to use and integrate into any web application. JsDiagram supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The tool boasts an elegant API, which is documented in details as well numerous step-by-step guides and tutorials. Various samples are provided to let you learn quickly how to use the most important features of the library – check them here. JsDiagram is not only the perfect choice for creating any type of diagram in the browser – it can also arrange it the way you wish with a mouse click using one of its automatic graph layout algorithms. For more details about the features of the component, please visit the JsDiagram page.

New Versions for Diagramming for ASP.NET, JavaScript and ASP.NET MVC

MindFusion has released new versions of its diagramming components for JavaScript, ASP.NET and ASP.NET MVC. The new features are almost identical and we list them below:

Zoom control
You can use the ZoomControl class to let users change interactively the current zoom level and scroll position of a DiagramView. First, add a ZoomControl element to the page and set the control’s TargetId property to the id of a DiagramView. Then set the ZoomStep and ScrollStep properties to specify the amount added to diagram’s zoom level or scroll position by ZoomControl’s buttons. You can customize the control’s appearance by setting properties such as Fill, BorderColor, CornerRadius and TickPosition.

Note: The Zoom control is not available in JavaApplet mode in Diagramming for ASP.NET.

The zoom control.

The zoom control.

Shadow styles
The Diagram.ShadowsStyle property and ShadowsStyle enumeration let you switch shadow rendering order between rendering all shadows in a single background layer (OneLevel) and drawing each shadow close to its node, possibly overlapping other nodes (ZOrder). ShadowsStyle.None lets you disable shadows altogether.

Miscellaneous

  • Set the LinkLabel.Brush property to fill the background of link labels.
  • Number of link segments can now be set by calling the DiagramLink.setSegmentCount() method.
  • The BackgroundImageAlign property specifies the alignment of diagram’s BackgroundImage.
  • The TextPadding property specifies the padding distance between the borders of a node and its text.
  • Nodes of all classes can be rotated.

You can download the trie versions of the components from the following links:

Download Diagramming for ASP.NET, V5.4

Download Diagramming for JavaScript, V2.2

Download Diagramming for ASP.NET MVC, V2.3

About Diagramming for JavaScript, ASP.NET and ASP.NET MVC: Web developers can use the tools to draw impressive diagrams, schemes, flowcharts, trees and many more. They are browser independent, easy to use and integrate into any web application. The components supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The tools boast an elegant API, which is documented in details as well numerous step-by-step guides and tutorials. Various samples are provided to let you learn quickly how to use the most important features each library. The diagramming components are not only the perfect choice for creating any type of diagram in the browser – they can also arrange it the way you wish with a mouse click using one of the automatic graph layout algorithms. For more details about the features of each component, please visit its page:

Diagramming for JavaScript, V2.1

MindFusion has just released a beta version of the Diagramming for JavaScript library.

SVG Nodes
The SvgNode class represents nodes that can display SVG drawings. SVG graphics are rendered instead of Image, and on top of the geometry rendered by the base ShapeNode class. You can enable the Transparent property to hide the node’s geometry and leave visible only the drawing.

SVG Nodes built with MindFusion.Diagramming for JavaScript.

SVG Nodes built with MindFusion.Diagramming for JavaScript.

jQuery support
You can now use jQuery for browser abstraction instead of Microsoft Ajax. To enable jQuery support, set MindFusionImpl=”JQuery” before loading the diagram script. Instead of Microsoft Ajax $create function, use the static Diagram.create(element) method to create a Diagram instance for a given Canvas element.

Miscellaneous

  • Set the BackgroundImageUrl property to draw an image as Diagram’s background.
  • The TextStyle property of links provides support for several different text position and orientation styles, defined by the LinkTextStyle enumeration.
  • Set the AllowUnconnectedLinks property to true to let users draw links without connecting them
    to nodes.

You can download the trial version directly from the following link:

Download Diagramming for JavaScript, V2.1 Trial Version

We shall be glad to receive any comments, suggestions and feedback. You can write us at e-mail support@mindfusion.eu or use the help desk. You can use the JsDiagram section on MindFusion forum to post questions about the tool.

About Diagramming for JavaScript Library: Written 100% in JavaScript, this tool uses HTML5 Canvas to draw impressive diagrams, schemes, flowcharts, trees and many more. It is browser independent, easy to use and integrate into any web application. JsDiagram supports a variety of predefined node shapes, customizable links, rich event set and many appearance options.

The user interaction model includes resizing / moving / selecting and modifying any diagram element. The tool boasts an elegant API, which is documented in details as well numerous step-by-step guides and tutorials. Various samples are provided to let you learn quickly how to use the most important features of the library – check them here. JsDiagram is not only the perfect choice for creating any type of diagram in the browser – it can also arrange it the way you wish with a mouse click using one of its automatic graph layout algorithms. For more details about the features of the component, please visit the JsDiagram page.