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javaeclipseeclipse-pluginxtext

How to show print margin/vertical line in EmbeddedEditor?

I want to show a vertical line (print margin in eclipse wording) after 120 characters in my org.eclipse.xtext.ui.editor.embedded.EmbeddedEditor. Is this supported somehow or is there some underlying editor available where I could create such a line?

Solution

  • Answer from greg-449s comment:

        final EmbeddedEditor editor = ...;
    editor.createPartialEditor();

    MarginPainter marginPainter = new MarginPainter(editor.getViewer());
    marginPainter.setMarginRulerColumn(120);
    marginPainter.setMarginRulerColor(Display.getDefault().getSystemColor(SWT.COLOR_GRAY));
    editor.getViewer().addPainter(marginPainter);

    You have to set the color, otherwise the next call to paint() will throw.