import { type IComponent } from "../../engine/engine_types.js";
export interface ICanvas extends IComponent {
    get isCanvas(): boolean;
    get screenspace(): boolean;
    registerTransform(rt: IRectTransform): any;
    unregisterTransform(rt: IRectTransform): any;
    registerEventReceiver(receiver: ICanvasEventReceiver): any;
    unregisterEventReceiver(receiver: ICanvasEventReceiver): any;
}
export interface ICanvasGroup {
    get isCanvasGroup(): boolean;
    blocksRaycasts: boolean;
    interactable: boolean;
}
export interface IHasAlphaFactor {
    setAlphaFactor(val: number): any;
}
export interface IGraphic extends IComponent, IHasAlphaFactor {
    get isGraphic(): boolean;
    raycastTarget: boolean;
}
export interface IRectTransform extends IComponent {
    get isDirty(): boolean;
    markDirty(): any;
    updateTransform(): any;
}
export interface IRectTransformChangedReceiver {
    onParentRectTransformChanged(comp: IRectTransform): void;
}
export interface ILayoutGroup extends IComponent {
    get isLayoutGroup(): boolean;
    get isDirty(): boolean;
    updateLayout(): any;
}
export interface ICanvasEventReceiver {
    /** Called before the canvas is rendering */
    onBeforeCanvasRender?(canvas: ICanvas): any;
}