67 lines
2.5 KiB
JavaScript
67 lines
2.5 KiB
JavaScript
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var Param = (function () {
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function Param(target, e) {
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this.target = target;
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this.topTarget = e && e.topTarget;
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}
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return Param;
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}());
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var Draggable = (function () {
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function Draggable(handler) {
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this.handler = handler;
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handler.on('mousedown', this._dragStart, this);
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handler.on('mousemove', this._drag, this);
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handler.on('mouseup', this._dragEnd, this);
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}
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Draggable.prototype._dragStart = function (e) {
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var draggingTarget = e.target;
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while (draggingTarget && !draggingTarget.draggable) {
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draggingTarget = draggingTarget.parent || draggingTarget.__hostTarget;
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}
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if (draggingTarget) {
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this._draggingTarget = draggingTarget;
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draggingTarget.dragging = true;
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this._x = e.offsetX;
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this._y = e.offsetY;
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this.handler.dispatchToElement(new Param(draggingTarget, e), 'dragstart', e.event);
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}
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};
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Draggable.prototype._drag = function (e) {
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var draggingTarget = this._draggingTarget;
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if (draggingTarget) {
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var x = e.offsetX;
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var y = e.offsetY;
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var dx = x - this._x;
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var dy = y - this._y;
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this._x = x;
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this._y = y;
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draggingTarget.drift(dx, dy, e);
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this.handler.dispatchToElement(new Param(draggingTarget, e), 'drag', e.event);
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var dropTarget = this.handler.findHover(x, y, draggingTarget).target;
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var lastDropTarget = this._dropTarget;
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this._dropTarget = dropTarget;
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if (draggingTarget !== dropTarget) {
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if (lastDropTarget && dropTarget !== lastDropTarget) {
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this.handler.dispatchToElement(new Param(lastDropTarget, e), 'dragleave', e.event);
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}
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if (dropTarget && dropTarget !== lastDropTarget) {
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this.handler.dispatchToElement(new Param(dropTarget, e), 'dragenter', e.event);
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}
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}
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}
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};
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Draggable.prototype._dragEnd = function (e) {
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var draggingTarget = this._draggingTarget;
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if (draggingTarget) {
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draggingTarget.dragging = false;
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}
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this.handler.dispatchToElement(new Param(draggingTarget, e), 'dragend', e.event);
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if (this._dropTarget) {
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this.handler.dispatchToElement(new Param(this._dropTarget, e), 'drop', e.event);
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}
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this._draggingTarget = null;
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this._dropTarget = null;
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};
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return Draggable;
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}());
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export default Draggable;
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