![]() ![]() A view also incorporates all kinds of graphical details, such as the background color of each box or the canvas, the line widths, the coordinate, margin or padding of each box, the font type and size, etc. For instance, for a class model, it would decide that each class is represented by a box, and relations are drawn as arrows. At this level the software producing the view decides (or lets the user decide) how the graphical representation of the model looks like, to minute detail. A concrete example would be a class model that models the different (souce-code-level) classes, including their name, description, attributes, and methods.Ī view makes a model tangible, by visually expressing it. Markup languages in-between those two extremes, which let you define objects in a model-like way, but also influence view-related aspects.īefore we take a closer look at these tools, let’s take a step back and try to understand the terms model and view I used above.Ī model describes the individual components of your system (including various attributes) and their relations to other components, using some kind of meta-language as notation.These editors store the view / diagram in a plain text format such as JSON, WYSIWYG editors which let you create views (without a backing model) by clicking buttons in a GUI.Model-based languages where you define abstract models and concrete views which reference model elements,.In a nutshell, there are three types of plain text markup languages (with respective generator tools): In that case, you need to spend additional time to learn about layout tricks the markup language offers, such as special constraint constructs. basic.The automatic layout chosen by the image generator is sometimes not optimal. ![]() For instance, my Markdown doc is named basic.md and when I export all diagrams (there are three) as SVG, three image files are generated: You also have the option to export all diagrams within a Markdown document (command palette option "PlantUML: Export Current File Diagrams"), which will create separate image files for each diagram. You can choose PNG, SVG, or other formats.** Here's the PNG and SVG versions of the diagram shown in the Preview pane, above: PNG SVG Choose "PlantUML: Export Current Diagram".open the command palette (Ctrl-Shift-P on my PC) or right click and select Command Palette.place your cursor within the desired PlantUML text,.Unlike plantuml, it is not a VS Code extension, but an executable. It works in conjunction with the plantuml extension installed earlier. In order to export individual diagrams, I need to install GraphViz, which is "open source graph visualization software". That's great, but what if you want to export a diagram from within the Markdown? For that you'll need a little help from your friends. What's more, the diagram in the Preview pane is kept in sync with the UML as described the Markdown document. I can include as many plantuml segments as I want in my Markdown, and the diagrams can be of any type supported by backgroundColor #EEEBDCĬustomer -> "login()" : username & passwordĬustomer -> "placeOrder()" : session token, order infoĭeactivate now when I open the VS Code's Preview pane: Markdown document on left, Preview on right Here I will embed PlantUML markup to generate a sequence diagram. With the extension installed, you can now insert UML diagrams using PlantUML language. You'll also need to have some version of Java installed, with JAVA_HOME environment variable set or an executable path with the java binary location in it.ĪDVERTISEMENT Adding PlantUML to your Markdown Then clicking install, or simply by running the following from a terminal pane (Ctrl+' gets you one): That extension is called plantuml, and you can install it either by searching for it in the extensions panel (click on the extension icon): With a single extension, you can visualize UML diagrams in VS Code's preview panel. VS Code) has become a popular editor for various computer languages, including Markdown. Drawing UML diagrams is tedious, but what if you could instead describe a UML diagram textually, in a way that you could include it directly in a Markdown-based document, see both diagrams and formatted text in a preview as your are editing it, and in addition can export the Markdown as HTML or PDF? Your text and diagrams are seamlessly integrated in one file.
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