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GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Work fast with our official CLI. Learn more. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again.

If nothing happens, download the GitHub extension for Visual Studio and try again. Node Editor Winforms is a Windows Forms class library project, that provides nodal editor control for general usage - e. It contains Windows Forms user control that after referencing it to your project could be added via UI designer in Visual Studio.

To use Node Editor first obtain source code from here, then open it in Visual Studio and finally build. The Release configuration may be considered when using in production - it really has much better rendering speed. Also good information here is that the Nodes Editor is written on top only. NET Framework 4. Within the Winforms designer right click on the Toolbox and select Choose Items In the Choose Toolbox Items dialog window choose. After accepting there should be User Control named NodesControl somewhere in the toolbox.

Now you can easily drag-drop the control into your UI. When you have NodesControl in your form or user control you should do first some minimal preparation. This step involves creating special context class that should implement INodesContext interface. In this context class you can put methods that will be exposed automatically as nodes by adding Node attribute to each method. Look at the example:. Now you have right setup and during application runtime, there context menu will appear after right clicking on NodesControl.

NodesControl has byte[] Serialize and Deserialize byte[] data methods that allow you to save and load node graph state. If you are unable to follow this rules e.

Custom node editor can be any object that is subclass of System. Control class. It is maintained automatically created and handled by NodesControl. You can specify custom editor for each node by giving its type as customEditor parameter of Node attribute. Keep in mind that custom editor will get NodeVisual object on its Tag property, so you can easily interact with node state.

NodeVisual object has a method named GetNodeContext by which you can obtain current node state - which is dynamic object, so you can just type member name and if it is not present, the member will be created property. Node state is a set of properties related to its inputs and outputs.

To start execution just simply call nodesControl1. Execute without parameterswhich will call the starter node the node you had marked as isExecutionInitiator:true. After that, the graph will execute through execution path yellow connections.

While the execution process is running, each node that is being actually executed will be put into the CurrentProcessingNode property of your context. To resolve any node just call nodesControl1. Resolving differs from execution, that it not need execution path to be provided.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

Work fast with our official CLI. Learn more. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again.

A more realistic use case of this library could be a shader editor. Here is a demo of a shader editor example made using NodeNetwork:.

These example applications are available for download here and their source is included in the repository. Binary releases of the library are available on NuGet. For an easy quickstart guide to using this library, see the cookbook chapters on this page. The documentation includes setup information, cookbook chapters, examples and an API reference. This library is licensed under the Apache License 2. See choosealicense. Documentation is available here. If you want to make changes to the documentation, you can do so by making a pull-request to the gh-pages branch.

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How to: Use the WPF Tree Visualizer

We use analytics cookies to understand how you use our websites so we can make them better, e. Skip to content. Dismiss Join GitHub today GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Wouterdek Bump version.

How to add, read, clear text or content in RichTexBox in WPF

Bump version. Git stats commits. Failed to load latest commit information. View code. NodeNetwork NodeNetwork is a. Here is a demo of a calculator example application: A more realistic use case of this library could be a shader editor. Here is a demo of a shader editor example made using NodeNetwork: These example applications are available for download here and their source is included in the repository.

Features Built for. NET Framework 4. NET Core 3. Interactive, robust controls build using modern reactive MVVM code. Proper panning, zooming controls Automatic layout system Highly customizable, but easy to use by default.This article examines the use and implementation of a WPF custom control that is used to display and edit networks, graphs and flow-charts.

Part 1 examines NetworkView usage with walkthroughs of the two sample projects. This part and the reference section are enough if you just want to use NetworkView. Part 2 goes into detail on the implementation. This will be useful if you want to make your own modifications to NetworkView or if you want to understand my approach to developing a complex WPF custom control.

At the end of the article is a reference section that describes the public properties, methods and commands exposed by NetworkView. In previous articles I have covered a number of WPF techniques: use of adornerszooming and panningbinding to UI element positions and most recently drag-selection of multiple items.

NetworkView: A WPF custom control for visualizing and editing networks, graphs and flow-charts

NetworkView and the sample applications make use of all these techniques. I won't be covering these techniques in detail here. Instead, where appropriate, I'll refer back to previous articles. NetworkView is intended to be backed with an application-specific view-model. This is similar to other WPF controls such as TreeView where you can also get by without a view-model.

Using a view-model is the way it is intended to be used, so this is what we will be looking at. The simple sample uses a simple view-model while the advanced sample extends the view-model and adds new features. This screenshot shows a simple graph created in the advanced sample. The main window shows a viewport onto the graph and beneath it the overview window shows the entire canvas.

An understanding of MVVMWPF stylescontrol templates and data-templates will also help, although I'll do my best to fill in some of the details along the way and provide links to learning resources.

I created the NetworkView control for a hobby project that required graph editing. I had hardly used WPF previously and so wanted to use it for the learning experience. In many ways it was easier, although it took me much longer than I anticipated to get WPF right in my head and that was mostly about coming to understand the WPF design philosophy. As I climbed the learning curve I realised that WPF is complicated, and at times makes your head want to explode, but much of it makes good sense.

WPF is a complex and powerful beast and in my view still needs many refinements, but so far it is the best way to develop a UI that I have tried. My first attempt at NetworkView was accomplished by hacking together a combination of a UserControl and various custom UI elements derived from FrameworkElement. The code for this article is my second attempt at NetworkView although development of it has been in progress for sometime and has been through much evolution, refactoring and improvement.

node editor wpf

The purpose of NetworkView is to visualize and edit graphs, flow-charts and networks. It almost goes without saying that you should be able to add and delete nodes, move nodes about, create connections between nodes and more.

node editor wpf

I wanted it to have high reusability and be customizable in the same manner as other WPF controls. This includes use of data-bindingdata-templates and styling to customize a the network's content.

However it is different in several key ways, but wherever possible it follows established conventions.

Node editing in WPF TreeView (TreeViewAdv)

To keep things simple I have not attempted to implement any kind of UI virtualisation.For more information about visual trees, see Trees in WPF. For more information about dependency properties, see Dependency Properties Overview. Select any object in the Visual Tree pane, and the Properties of Name : Type pane is automatically updated to show the properties for that object. In the Visual Tree pane, type the string you want to search for in the Search box.

The WPF Tree visualizer immediately finds the first object in the visual tree that matches the string you have typed. Type more characters to find a more accurate match. In the Properties of Name : Type pane, type the string you want to search for in the Filter box.

NodeNetwork

The WPF Tree visualizer immediately finds the properties that match the string you have typed; now, the list displays only those properties matching the string you have typed. Type more characters to find a more-accurate match.

Skip to main content. Contents Exit focus mode. Is this page helpful? Yes No. Any additional feedback? Skip Submit. Submit and view feedback for This product This page. View all page feedback.The default is false. The following code example lets the user edit nonroot tree nodes by using a ContextMenu.

When the user right clicks the mouse, the TreeNode at that position is determined and stored in a variable named mySelectedNode. If a nonroot tree node was selected, it is put into an editable state, which allows the user to edit the node label. After the user stops editing the tree node label, the new label text is evaluated and saved.

For this example, several characters are considered not valid in the label text. If one of the invalid characters is in the label string, or the string is empty, the user is notified of the error and the label is returned to its previous text.

node editor wpf

The BeginEdit method works only if the LabelEdit property is true. If LabelEdit is false when you attempt to edit the label, an exception will be thrown and the tree node will not be put in to an editable state. Skip to main content. Contents Exit focus mode. Tree View. Forms Assembly: System. Gets or sets a value indicating whether the label text of the tree nodes can be edited.

Is this page helpful? Yes No. Any additional feedback? Skip Submit.In order to understand the code and documentation, it is important to understand the naming scheme for the GUI controls.

The general hierarchy is as follows:. Outputs can also have an editor to configure the output, but keep in mind that it might be better to configure the output using inputs. A picture is worth a thousand words, so here is a more visual diagram of a node and its contents:.

Connections can only be formed between different nodes. By default, each input can only have 1 associated connection, while outputs can have unlimited. This can be changed using the MaxConnections property. While it has an input and an output property, either can be null depending on where the user clicked down and what the cursor is currently over. All connections that intersect with the line are highlighted and are removed on mouseup. The selection rectangle is shown when the user holds shift and left clicks and drags.

Any node that intersects or is contained in the rectangle is selected, while all others are unselected.Designing a user interface, I came across a need of editing the headers of items in a tree-like hierarchical data structure, like this:. Certainly, it should be easy when one has WPF at his disposal! But it took me surprisingly long time to achieve this goal, and that is why I decided to share my findings with the colleagues here.

The solution appears to be simple and does the expected job. Suppose that we have a tree-like data structure, which is presented to the user in a TreeView control:. A document is an ObservableCollectionwhich features several parent items with editable names. Parents have children, which are just fixed strings in this simple example.

Our aim is to show this hierarchical collection in a TreeView such, that the user may edit the names of the parent items as in the figure above. The edit mode shall be activated by clicking a selected item with the mouse or by pressing F2, which I regard as being the expected behavior of the control. And last but not least MVVM!!! Having seen this simple example of exposing a hierarchical collection in a TreeView using HierarchicalDataTemplate for objects of different data types, I quickly handcrafted a simple solution:.

Certainly, the data context of the control shall be set to an instance of TreeViewDocument. But selecting the parent items and navigating through the tree using the keyboard is impossible.

One wishes a possibility to switch between the viewing mode and editing the headers. The problem is discussed for example here. A general suggestion is to use data triggers and switch the data presentation in a HierarchicalDataTemplate from static text to an editable text box based on the IsSelected property of the corresponding TreeViewItem.

As many poing out, this does not solve the problem, as editing starts as soon as the user selects the item. Googling, I found something. There is a solution in an "essential objects" bundle of WPF controls, which is, however, not available for free. I have also checked this solutionthis control and this projectand was not satisfied: one needs to link to external libraries, and the resulting behavior was not quite as expected. A simpler solution is presented below. We again use HierarchicalDataTemplatewhich switches the presentation of parent items to the editing mode when two conditions are met:.

The control switches to edit mode when the user clicks on a selected item remember, that only particular data types are covered by the data template, such that nothing would happen if an item is not editableor the user presses F2.


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