vtkjs 事件系统一 vtkRenderWindowInteractor

最新推荐文章于 2025-06-23 17:48:47 发布

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最新推荐文章于 2025-06-23 17:48:47 发布 · 1.2k 阅读

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本文详细介绍了VTK库中RenderWindowInteractor如何通过command/observer设计模式处理事件，包括事件的初始化绑定、事件方法生成、DOM事件的绑定以及macro.event方法在事件系统中的作用。重点展示了如何创建和响应各类事件，如StartAnimation、MouseMove等。

Interactor中的事件系统的使用

vtkRenderWindowInteractor routes events through VTK's command/observer

design pattern. That is, when vtkRenderWindowInteractor (actually, one of

its subclasses) sees an event, it translates it into

a VTK event using the InvokeEvent() method. Afterward, any vtkInteractorObservers

registered for that event are expected to respond appropriately.

1.Interactor首先在初始化中对所有事件进行设计模式相关方法的绑定

const handledEvents = [
  'StartAnimation',
  'Animation',
  'EndAnimation',
  'StartMouseMove',
  'MouseMove',
  'EndMouseMove',
  'LeftButtonPress',
...


export function extend(publicAPI, model, initialValues = {}) {
...
macro.event(publicAPI, model, 'RenderEvent');
  handledEvents.forEach((eventName) =>
    macro.event(publicAPI, model, eventName)
  );
...
}

macro.event注册后会生成invokeEvent(),onEvent(callback,priority),delete()三个方法来分发事件，注册事件钩子，