@ue-too/board / index / PanToHandlerFunction

型別別名: PanToHandlerFunction()

PanToHandlerFunction = (destination, camera, config) => Point

定義於: packages/board/src/camera/camera-rig/pan-handler.ts:160

Handler function type for absolute "pan to" camera operations.

參數

destination

Point

Target camera position in world space

camera

BoardCamera

Current camera instance

config

PanHandlerConfig

Pan behavior configuration

回傳

Point

Transformed destination position (after applying restrictions and clamping)

備註

Pan-to handlers process absolute camera positioning requests. They form a pipeline that can apply restrictions, clamping, and other transformations to the target position.

Handler pipeline pattern:

• Each handler receives the current destination, camera state, and config
• Returns a potentially modified destination point
• Handlers can be chained using createHandlerChain

Common transformations:

• Axis restrictions (prevent movement on specific axes)
• Boundary clamping (keep position within bounds)
• Viewport constraints (ensure entire viewport stays in bounds)

範例

const myPanToHandler: PanToHandlerFunction = (dest, camera, config) => {
  // Custom logic: snap to grid
  return {
    x: Math.round(dest.x / 100) * 100,
    y: Math.round(dest.y / 100) * 100
  };
};

參閱

• createHandlerChain for composing handler pipelines
• createDefaultPanToHandler for the default implementation