How to use HTML in the JavaFX controls?

JavaFX supports using HTML in the text of the JavaFX controls? For example, in the Swing components:

button = new JButton("<html><font face=arial size=16><center><b><u>E</u>nable</b></font><br>"
  + "<font face=cambria size=12 color=#ffffdd>middle button</font></html>");

If not, we could find a workaround?

Incorporating a WebView in a label for the HTML rendering


A WebView is a node that displays HTML.

Most of the controls implement labelled, or have elements that are labeled.

One labeled has a method setGraphic (node) that allows you to establish the chart attached to the label of a node given (including a WebView).

For example:

WebView webview = new WebView();
webview.getEngine().loadContent("
Enable
middle button"); webview.setPrefSize(150, 50); Button buttonWithHTML = new Button("", webview);

need to create a button with html in there (I didn't actually try running the example above).

Aside time to start relatively slow on first use and overhead costs (which I can't quantify) to use WebView in this way, there are a couple of jira exceptional applications that are a bit annoying.

RT-25004 allow transparent backgrounds in WebView

RT-25005 favorite auto sizing for WebView

You can vote for applications above jira or comment if such a feature is important to you.

FXML/TextFlow/CSS Alternative

Rather than using html in the labelled, TextFlow control support was introduced in Java 8, so that could be used instead.

TextFlow also works well with FXML and css if you prefer to have the stuff in the TextFlow handled via a markup and a declarative style language.

Open feature request

There is a feature open request RT-2160 HTML support for text , which is currently scheduled for implementation in the initial release of Java 8.  I think the likelihood of it actually included it is zero percent, if it can be considered for a future version.  You can vote for the issue or add comments to it or provide an implementation if you are so inclined.

Implementation considerations

A possible implementation would be something that analyzes the HTML and then built a TextFlow HTML parsed according to the rules that are set out laborious mind-numbing detail in the specification HTML5 treatment.

You can use an HTML parser relaxed such as the analysis of validator.nur (even though there may be others who would be a better fit).

A simple implementation would be just to use the Analyzer in the jdk that is used for the swing controls, but that is hopelessly outdated.

Perhaps, even simpler would be to accept only html strict entry and just use SAX to parse out, although things like validator.nu are too difficult to work with.

Then, to the limited number of analyzed tags that you want to support (and you don't want to really not compatible with HTML5 all for something like this - otherwise use just WebView), create your TextFlow of the DOM who created your Analyzer.

I wouldn't even both trying to handle most of the things in your html string in your application, stuff to do with style, fonts, colors, etc. These things were never in any case any good html and css is better for their handling, so just support things commonly used in modern day regular html (take a look at the HTML source "bootstrap" for example to see what it might be - if bootstrap uses her, I don't think not that you support it).  Things will support you are things around structure of document as lists, headings, etc. div blocks and cover the nodes - so only to implement this kind of important things and delegate all the rest to css where it belongs.

Also, make sure that your implementation is part of the FXML so that you can easily integrate your html subset in a doc FXML.

Tags: Java

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