import { MonitorBase } from './monitor-base';
/** The monitor available in {@link DragSource}'s listen method. */
export interface DragSourceMonitor<Item = unknown, DropResult = unknown> extends MonitorBase<Item> {
    /**
     * Returns `true` if **NO drag operation is in progress**, and the owner's
     * `canDrag()` returns `true` or is not defined.
     *
     * Note that `canDrag` doesn't blindly return what you supplied in
     * {@link DragSourceSpec#canDrag}, so it isn't very useful as a general
     * source-is-enabled/disabled flag.
     *
     * Instead, keep your `canDrag` logic simple, and replicate it in your template.
     *
     * ```html
     * <div [style.background]="someProperty ? 'yellow' : 'grey'"> content </div>
     * ```
     *
     * ```typescript
     * {
     *   canDrag: () => this.someProperty
     * }
     * ```
     */
    canDrag(): boolean;
    /**
     * Returns `true` if a drag operation is in progress, and either the owner
     * initiated the drag, or its `isDragging()` is defined and returns true.
     */
    isDragging(): boolean;
    /**
     * Returns a plain object representing the last recorded drop result. The
     * drop targets may optionally specify it by returning an object from their
     * `drop()` methods. When a chain of `drop()` is dispatched for the nested
     * targets, bottom up, any parent that explicitly returns its own result from
     * `drop()` overrides the child drop result previously set by the child.
     * Returns `null` if called outside `endDrag()`.
     */
    getDropResult(): DropResult;
    /**
     * Returns `true` if some drop target handled the `drop` event; `false`
     * otherwise. Even if a target did not return a drop result, `didDrop()`
     * returns true. Use it inside `endDrag()` to test whether any drop target
     * has handled the drop. Returns `false` if called outside `endDrag()`.
     */
    didDrop(): boolean;
}