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70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
/**
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* dd-base-impl.ts 12.6.0
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* Copyright (c) 2021-2025 Alain Dumesny - see GridStack root license
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*/
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/**
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* Abstract base class for all drag & drop implementations.
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* Provides common functionality for event handling, enable/disable state,
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* and lifecycle management used by draggable, droppable, and resizable implementations.
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*/
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export class DDBaseImplement {
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constructor() {
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/** @internal */
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this._eventRegister = {};
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}
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/**
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* Returns the current disabled state.
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* Note: Use enable()/disable() methods to change state as other operations need to happen.
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*/
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get disabled() { return this._disabled; }
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/**
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* Register an event callback for the specified event.
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*
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* @param event - Event name to listen for
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* @param callback - Function to call when event occurs
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*/
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on(event, callback) {
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this._eventRegister[event] = callback;
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}
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/**
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* Unregister an event callback for the specified event.
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*
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* @param event - Event name to stop listening for
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*/
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off(event) {
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delete this._eventRegister[event];
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}
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/**
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* Enable this drag & drop implementation.
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* Subclasses should override to perform additional setup.
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*/
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enable() {
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this._disabled = false;
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}
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/**
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* Disable this drag & drop implementation.
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* Subclasses should override to perform additional cleanup.
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*/
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disable() {
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this._disabled = true;
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}
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/**
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* Destroy this drag & drop implementation and clean up resources.
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* Removes all event handlers and clears internal state.
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*/
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destroy() {
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delete this._eventRegister;
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}
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/**
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* Trigger a registered event callback if one exists and the implementation is enabled.
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*
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* @param eventName - Name of the event to trigger
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* @param event - DOM event object to pass to the callback
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* @returns Result from the callback function, if any
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*/
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triggerEvent(eventName, event) {
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if (!this.disabled && this._eventRegister && this._eventRegister[eventName])
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return this._eventRegister[eventName](event);
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}
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}
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//# sourceMappingURL=dd-base-impl.js.map |