英文:
How to show print margin/vertical line in EmbeddedEditor?
问题
我想在我的org.eclipse.xtext.ui.editor.embedded.EmbeddedEditor中的每 120 个字符后显示一条垂直线（在 Eclipse 的术语中称为打印边距）。是否支持这样做，或者是否有某个基础编辑器可用，我可以在其中创建这样的线？
英文:
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?
答案1
得分: 0
从 greg-449s 的评论中得到的回答：
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);
必须设置颜色，否则下一次对 `paint()` 的调用会抛出异常。
英文:
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.
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