[ HasEmitter ]
public virtual signal void query_data (TextIter start, TextIter end, SourceGutterRendererState state)
The query_data signal is emitted when the renderer needs to be filled with data just before a cell is drawn.
This can be used by general renderer implementations to allow render data to be filled in externally.
| start |
a TextIter |
| end |
a TextIter |
| state |
the renderer state |