From 0b27586a7f3c45016cab169661d914154a4d81ef Mon Sep 17 00:00:00 2001
From: Catalin Mititiuc
Date: Thu, 8 Aug 2024 13:45:24 -0700
Subject: WIP: auto-pan map to selected counter
---
node_modules/pan-zoom/src/modules/pan.js | 86 ++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
create mode 100644 node_modules/pan-zoom/src/modules/pan.js
(limited to 'node_modules/pan-zoom/src/modules')
diff --git a/node_modules/pan-zoom/src/modules/pan.js b/node_modules/pan-zoom/src/modules/pan.js
new file mode 100644
index 0000000..844524d
--- /dev/null
+++ b/node_modules/pan-zoom/src/modules/pan.js
@@ -0,0 +1,86 @@
+import getComputedTransformMatrix from './utils.js';
+
+const minDistanceThreshold = 5;
+
+function distanceBetween({ x: x1, y: y1 }, { x: x2, y: y2 }) {
+ return Math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2);
+}
+
+function minDistanceThresholdIsMet(startPt, endPt) {
+ return distanceBetween(startPt, endPt) >= minDistanceThreshold;
+}
+
+function stopEventPropagationToChildren(el, type) {
+ el.addEventListener(type, e => e.stopPropagation(), { capture: true, once: true });
+}
+
+function getTranslateMatrix(startPt, movePt) {
+ const translateMatrix = new DOMMatrix();
+
+ return translateMatrix.translate(movePt.x - startPt.x, movePt.y - startPt.y);
+}
+
+export function manualPan(gb, counter) {
+ const mtx = getComputedTransformMatrix(gb),
+ inverseScreenCTM = gb.getScreenCTM().inverse();
+
+ const counterRect = counter.getBoundingClientRect();
+ const mapRect = document.querySelector('object').getBoundingClientRect();
+
+ let startPt = new DOMPoint(counterRect.x, counterRect.y);
+ let movePt = new DOMPoint(mapRect.width / 2, mapRect.height / 2);
+
+ startPt = startPt.matrixTransform(inverseScreenCTM);
+ movePt = movePt.matrixTransform(inverseScreenCTM);
+
+ gb.style.transition = 'transform 0.5s';
+ gb.style.transform = mtx.multiply(getTranslateMatrix(startPt, movePt));
+ gb.addEventListener('transitionend', () => gb.style.transition = '');
+}
+
+export default function (svg, el, e) {
+ e.preventDefault();
+
+ const mtx = getComputedTransformMatrix(el),
+ inverseScreenCTM = el.getScreenCTM().inverse();
+
+ let startPt = new DOMPoint(e.clientX, e.clientY),
+ movePt = new DOMPoint(),
+ isPanning = false;
+
+ function pointerMove(e) {
+ movePt.x = e.clientX;
+ movePt.y = e.clientY;
+
+ if (!isPanning && minDistanceThresholdIsMet(startPt, movePt)) {
+ isPanning = true;
+ //e.target.setPointerCapture(e.pointerId);
+
+ startPt.x = e.clientX;
+ startPt.y = e.clientY;
+ startPt = startPt.matrixTransform(inverseScreenCTM);
+
+ stopEventPropagationToChildren(el, 'click');
+ }
+
+ if (isPanning) {
+ movePt.x = e.clientX;
+ movePt.y = e.clientY;
+ movePt = movePt.matrixTransform(inverseScreenCTM);
+
+ el.style.transform = mtx.multiply(getTranslateMatrix(startPt, movePt));
+ }
+ }
+
+ svg.addEventListener('pointermove', pointerMove);
+
+ svg.addEventListener(
+ 'pointerup',
+ () => {
+ svg.removeEventListener('pointermove', pointerMove);
+ const t1Rect = t1.getBoundingClientRect();
+ console.log('trooper1 DOM x,y', t1Rect.x, t1Rect.y);
+ },
+ { once: true }
+ );
+}
--
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