Stefan Hacker
54 lines
1.7 KiB
TypeScript
54 lines
1.7 KiB
TypeScript
import { EventGroup } from '../../Utilities';
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import type { IDragDropHelper, IDragDropOptions } from './interfaces';
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import type { ISelection } from '../../utilities/selection/interfaces';
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export interface IDragDropHelperParams {
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selection: ISelection;
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minimumPixelsForDrag?: number;
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}
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export declare class DragDropHelper implements IDragDropHelper {
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private _dragEnterCounts;
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private _isDragging;
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private _dragData;
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private _selection;
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private _activeTargets;
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private _events;
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private _lastId;
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private _initialized;
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constructor(params: IDragDropHelperParams);
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dispose(): void;
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subscribe(root: HTMLElement, events: EventGroup, dragDropOptions: IDragDropOptions): {
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key: string;
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dispose(): void;
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};
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unsubscribe(root: HTMLElement, key: string): void;
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private _onDragEnd;
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/**
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* clear drag data when mouse up on body
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*/
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private _onMouseUp;
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/**
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* clear drag data when mouse up outside of the document
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*/
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private _onDocumentMouseUp;
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/**
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* when mouse move over a new drop target while dragging some items,
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* fire dragleave on the old target and fire dragenter to the new target
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* The target will handle style change on dragenter and dragleave events.
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*/
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private _onMouseMove;
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/**
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* when mouse leave a target while dragging some items, fire dragleave to the target
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*/
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private _onMouseLeave;
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/**
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* when mouse down on a draggable item, we start to track dragdata.
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*/
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private _onMouseDown;
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/**
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* determine whether the child target is a descendant of the parent
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*/
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private _isChild;
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private _isDraggable;
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private _isDroppable;
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}
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