✨ Add a way to access the touchMap to PixelPerfectTouch

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@shadryx/pptk",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Pixel-Perfect ToolKit, a library to help make pixel-perfect applications on high-DPI devices",
   "keywords": [
     "pixel-perfect",

src/index.js

@@ -175,6 +175,7 @@ export function getContext2D(canvas) {
  * @prop {((touch: Touch[], touches: Map<number, Touch>) => void)=} onMove
  * @prop {((touch: Touch | undefined, touches: Map<number, Touch>) => void)=} onUp
  * @prop {number=} downscale
+ * @prop {boolean=} preventDefault
  **/
 
 /**
@@ -191,11 +192,7 @@ export function attachTouch(element, options = {}) {
     let queued_touches = [];
 
     function get_dpr() {
-        if (options.dpr) {
         return window.devicePixelRatio ?? 1;
-        } else {
-            return 1;
-        }
     }
 
     function onDown(event) {
@@ -233,7 +230,7 @@ export function attachTouch(element, options = {}) {
         let y = (event.clientY - bounding.y) * dpr / downscale;
 
         if (touches.has(event.pointerId)) {
-            let touch = touches.get(event.pointerId);
+            let touch = cloneGet(touches, event.pointerId);
 
             touch.dx = x - touch.x;
             touch.dy = y - touch.y;
@@ -659,3 +656,23 @@ function subpixelPenalty(value) {
 function approxEq(a, b, epsilon = 0) {
     return Math.abs(a - b) <= epsilon;
 }
+
+/**
+ * Performs a shallow clone on `map.get(key)`, and replaces that value in the map.
+ * @template K,V
+ * @param {Map<K, V>} map - The map to get the object from, will be mutated
+ * @param {K} key
+ * @returns {V | undefined}
+ **/
+function cloneGet(map, key) {
+    let value = map.get(key);
+    if (!value) return value;
+    if (typeof value === 'object') {
+        value = {
+            ...value
+        };
+        map.set(key, value);
+    }
+
+    return value;
+}

src/solid/PixelPerfectTouch.tsx

@@ -1,12 +1,16 @@
-import { children, Component, createEffect, JSX, onCleanup } from "solid-js";
-import { attachTouch, AttachTouchOptions, Touch } from "../index.js";
-
-export type TouchHandler<T = Touch> = (touches: Map<number, Touch>, touch: T) => void;
+import { Component, createEffect, createSignal, type JSX, onCleanup } from "solid-js";
+import { attachTouch, type AttachTouchOptions, type Touch } from "../index.js";
 
 export type PixelPefectTouchProps = {
     children: JSX.Element;
 
     onMount?: (element: HTMLDivElement) => void;
+
+    /**
+     * Called whenever the touchMap is updated.
+     * You can safely pass the setter of a solid.js signal to have reactive updates to the touchMap.
+     **/
+    onUpdate?: (touchMap: Map<number, Touch>) => void
 } & AttachTouchOptions;
 
 export const PixelPerfectTouch: Component<PixelPefectTouchProps> = (
@@ -19,7 +23,21 @@ export const PixelPerfectTouch: Component<PixelPefectTouchProps> = (
 
         if (!element) return;
 
-        const cleanup = attachTouch(element, options);
+        const cleanup = attachTouch(element, {
+            ...options,
+            onDown(touch, touchMap) {
+                options.onUpdate?.(new Map(touchMap));
+                options.onDown?.(touch, touchMap);
+            },
+            onUp(touch, touchMap) {
+                options.onUpdate?.(new Map(touchMap));
+                options.onUp?.(touch, touchMap);
+            },
+            onMove(touches, touchMap) {
+                options.onUpdate?.(new Map(touchMap));
+                options.onMove?.(touches, touchMap);
+            }
+        });
 
         onCleanup(cleanup);
     });