RenderEditablePainter class abstract

An interface that paints within a RenderEditable's bounds, above or beneath its text content.

This painter is typically used for painting auxiliary content that depends on text layout metrics (for instance, for painting carets and text highlight blocks). It can paint independently from its RenderEditable, allowing it to repaint without triggering a repaint on the entire RenderEditable stack when only auxiliary content changes (e.g. a blinking cursor) are present. It will be scheduled to repaint when:

• It's assigned to a new RenderEditable (replacing a prior RenderEditablePainter) and the shouldRepaint method returns true.
• Any of the RenderEditables it is attached to repaints.
• The notifyListeners method is called, which typically happens when the painter's attributes change.

See also:

• RenderEditable.foregroundPainter, which takes a RenderEditablePainter and sets it as the foreground painter of the RenderEditable.
• RenderEditable.painter, which takes a RenderEditablePainter and sets it as the background painter of the RenderEditable.
• CustomPainter, a similar class which paints within a RenderCustomPaint.