Class Action

An action is typically activated when a view receives an input that maps to the action in one of its InputMaps. For example, the action may be added to a view's gesture map with a keyboard shortcut.

Example: Define an action that makes the current selection transparent

class MakeInvisibleAction extends micd.Action {
  canApplyTo(view) {
    return view.editor.hasSelection() && !view.editor.readOnly;
  }
  applyTo(view) {
    const ed = view.editor;
    ed.beginCompoundEdit();
    try {
      const selection = micd.Clip.from(ed);
      ed.apply(micd.EditorCommand.deleteSelection);
      view.type(".RGB0000 ");
      selection.applyTo(ed);
      ed.apply(micd.EditorCommand.forwardEnter);
    } finally {
      ed.endCompoundEdit();
    }
  }
  toString() {
    return "Make invisible";
  }
}

view.gestureMap.put(micd.Keystroke.CtrlI,
    new MakeInvisibleAction());

see

InputMap