Bulk Pixel Coloring (Rectangle Drag)

[pexeixv]

Goal:
Allow the user to click and drag over multiple cells to fill a rectangle with the selected color.

Requirements:

• Hold mouse down and drag over cells to select a rectangle.
• Highlight the selection visually while dragging.
• On mouse release, color all selected cells with the current color.
• Must work with Undo/Redo functionality.

Notes:
This enables faster drawing for larger shapes and patterns.