paint-ui/tools/base-tool.ts

import type { PointerState } from '@/types';

/**
 * Abstract base class for all tools
 */
export abstract class BaseTool {
  protected isActive = false;
  protected isDrawing = false;

  constructor(public name: string) {}

  /**
   * Called when tool is activated
   */
  onActivate(): void {
    this.isActive = true;
  }

  /**
   * Called when tool is deactivated
   */
  onDeactivate(): void {
    this.isActive = false;
    this.isDrawing = false;
  }

  /**
   * Called on pointer down
   */
  abstract onPointerDown(
    pointer: PointerState,
    ctx: CanvasRenderingContext2D,
    settings: any
  ): void;

  /**
   * Called on pointer move
   */
  abstract onPointerMove(
    pointer: PointerState,
    ctx: CanvasRenderingContext2D,
    settings: any
  ): void;

  /**
   * Called on pointer up
   */
  abstract onPointerUp(
    pointer: PointerState,
    ctx: CanvasRenderingContext2D,
    settings: any
  ): void;

  /**
   * Get cursor style for this tool
   */
  getCursor(settings: any): string {
    return 'crosshair';
  }
}