问题
I am making a pascal code editor in Mono in MonoDevelop. I am using Mono.TextEditor as a code editor widget. However, I cannot find how to highlight a line in the widget.
After compilation, I collect line numbers where errors occur, and so I want to highlight them in red. I found
Mono.TextEditor.LineBackgroundMarker
which seems to relate to what I want to do, but I cannot find where and how to use it.
Another option I was looking into was ViBuilder, but I don't even know how to use that. I can think of two ways to solve this problem:
- Simply make highlight
Mark a line as error, as default style includes:
{ "name": "Underline(Error)", "color":"invalid-red" }
which also seems to be a possible solution.
回答1:
You can highlight lines in the text editor by adding markers to the underlying document. Use the TextDocument.AddMarker method, as follows:
TextEditor textEditor;
var marker = new Mono.TextEditor.LineBackgroundMarker();
int lineNumber = ...;
textEditor.Document.AddMarker(lineNumber, marker);
textEditor.QueueDraw();
Also have a look at the Mono.TextEditor.StyleTextMarker class. This class has already the properties "BackgroundColor" / "Color" that you are looking for. Underlining may have to be done manually (for example by inheriting from StyleTextMarker and overriding the Draw method).
来源：https://stackoverflow.com/questions/15660859/mono-texteditor-highlight-line