Complete RectangularGridDragSelection implementation

[Copilot]

Brings RectangularGridDragSelection from 66% to 100% complete. Class enables drag-to-select square grid areas with adjustable cell granularity.

Constructors

• Initialize rectangleGranularitySlider and gridGranularitySubmit button with proper positioning
• Set default granularity (10.0f, range 5-50) and call updateGridCells() on construction

Visual States

Enhanced draw() with three rendering modes:

• Dragging: Blue semi-transparent fill during active selection
• Configure: Green outline with visible grid cells and granularity controls
• Idle: Gray outline with cell count display

State Machine

• mousePressed(): Respect configure mode; start new selection only when not configuring
• mouseDragged(): Enforce square bounds during drag; update cells when slider adjusts
• mouseReleased(): Enter configure mode on valid selection (>10px); exit on submit

Helper Methods

void reset();                           // Clear selection and return to initial state
bool isConfiguring() const;             // Query current mode
bool isActive() const;                  // Check if grid is in use
int getCellCount() const;               // Return number of generated cells

Safety

updateGridCells() now validates:

• Granularity > 0 and ≤ 1000 (prevents OOM from excessive cell allocation)
• Grid bounds have positive dimensions (prevents division by zero)
• Loop indices use int instead of float for iteration

Documentation

• Updated class status to COMPLETE (3/3, 100%)
• Completed truncated gridConfigureMode comment
• Added implementation status and feature list to class documentation

Original prompt

On NavigationalComponents.hpp, Complete implementation of class RectangularGridDragSelection

Custom agent used: openframeworks-ui-assistant
A specialized engineering agent that assists with designing, refactoring, documenting, and extending C++ OpenFrameworks user-interface components. Provides bottom-up explanations of architecture, generates clean and idiomatic C++ code, proposes UI interaction patterns, and maintains consistent style and documentation conventions across the library.

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