paintGrid method

@override void paintGrid(Canvas canvas, NodeFlowTheme theme, ({double bottom, double left, double right, double top}) gridArea)

Renders the style-specific grid pattern.

Each grid style implements this method to draw its specific pattern (lines, dots, crosses, etc.) using the pre-calculated gridArea.

Parameters:

• canvas: The canvas to paint on
• theme: Theme containing grid configuration
• gridArea: Pre-calculated grid-aligned area covering the visible region

Implementation

@override
void paintGrid(
  Canvas canvas,
  NodeFlowTheme theme,
  ({double left, double top, double right, double bottom}) gridArea,
) {
  // Intentionally empty - render nothing
}