80 lines
2.7 KiB
JavaScript
80 lines
2.7 KiB
JavaScript
class ObservablePoint {
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/**
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* Creates a new `ObservablePoint`
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* @param cb - callback function triggered when `x` and/or `y` are changed
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* @param scope - owner of callback
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* @param {number} [x=0] - position of the point on the x axis
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* @param {number} [y=0] - position of the point on the y axis
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*/
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constructor(cb, scope, x = 0, y = 0) {
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this._x = x, this._y = y, this.cb = cb, this.scope = scope;
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}
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/**
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* Creates a clone of this point.
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* The callback and scope params can be overridden otherwise they will default
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* to the clone object's values.
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* @override
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* @param cb - The callback function triggered when `x` and/or `y` are changed
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* @param scope - The owner of the callback
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* @returns a copy of this observable point
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*/
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clone(cb = this.cb, scope = this.scope) {
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return new ObservablePoint(cb, scope, this._x, this._y);
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}
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/**
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* Sets the point to a new `x` and `y` position.
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* If `y` is omitted, both `x` and `y` will be set to `x`.
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* @param {number} [x=0] - position of the point on the x axis
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* @param {number} [y=x] - position of the point on the y axis
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* @returns The observable point instance itself
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*/
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set(x = 0, y = x) {
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return (this._x !== x || this._y !== y) && (this._x = x, this._y = y, this.cb.call(this.scope)), this;
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}
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/**
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* Copies x and y from the given point (`p`)
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* @param p - The point to copy from. Can be any of type that is or extends `IPointData`
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* @returns The observable point instance itself
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*/
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copyFrom(p) {
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return (this._x !== p.x || this._y !== p.y) && (this._x = p.x, this._y = p.y, this.cb.call(this.scope)), this;
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}
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/**
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* Copies this point's x and y into that of the given point (`p`)
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* @param p - The point to copy to. Can be any of type that is or extends `IPointData`
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* @returns The point (`p`) with values updated
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*/
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copyTo(p) {
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return p.set(this._x, this._y), p;
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}
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/**
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* Accepts another point (`p`) and returns `true` if the given point is equal to this point
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* @param p - The point to check
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* @returns Returns `true` if both `x` and `y` are equal
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*/
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equals(p) {
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return p.x === this._x && p.y === this._y;
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}
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/** Position of the observable point on the x axis. */
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get x() {
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return this._x;
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}
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set x(value) {
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this._x !== value && (this._x = value, this.cb.call(this.scope));
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}
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/** Position of the observable point on the y axis. */
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get y() {
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return this._y;
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}
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set y(value) {
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this._y !== value && (this._y = value, this.cb.call(this.scope));
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}
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}
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ObservablePoint.prototype.toString = function() {
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return `[@pixi/math:ObservablePoint x=${this.x} y=${this.y} scope=${this.scope}]`;
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};
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export {
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ObservablePoint
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};
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//# sourceMappingURL=ObservablePoint.mjs.map
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