paint-ui/types/canvas.ts

/**
 * Canvas state interface
 */
export interface CanvasState {
  /** Canvas width in pixels */
  width: number;
  /** Canvas height in pixels */
  height: number;
  /** Current zoom level (1 = 100%) */
  zoom: number;
  /** Pan offset X */
  offsetX: number;
  /** Pan offset Y */
  offsetY: number;
  /** Background color */
  backgroundColor: string;
  /** Show grid overlay */
  showGrid: boolean;
  /** Grid size in pixels */
  gridSize: number;
  /** Show rulers */
  showRulers: boolean;
  /** Snap to grid */
  snapToGrid: boolean;
}

/**
 * Selection interface for selected regions
 */
export interface Selection {
  /** Is there an active selection */
  active: boolean;
  /** Selection bounds */
  x: number;
  y: number;
  width: number;
  height: number;
  /** Selection path (for complex selections) */
  path?: Path2D;
}

/**
 * Mouse/pointer state
 */
export interface PointerState {
  /** Is pointer currently down */
  isDown: boolean;
  /** Current X position (canvas coordinates) */
  x: number;
  /** Current Y position (canvas coordinates) */
  y: number;
  /** Previous X position */
  prevX: number;
  /** Previous Y position */
  prevY: number;
  /** Pressure (0-1, for stylus) */
  pressure: number;
}

/**
 * Viewport transformation
 */
export interface Viewport {
  /** Scale factor */
  scale: number;
  /** Translation X */
  translateX: number;
  /** Translation Y */
  translateY: number;
}

/**
 * Canvas to screen coordinate conversion result
 */
export interface Point {
  x: number;
  y: number;
}