WIP: auto-pan map to selected counter

node_modules/pan-zoom/index.js

@@ -0,0 +1,2 @@
+export { default as pan, manualPan } from './src/modules/pan.js';
+export { default as zoom } from './src/modules/zoom.js';

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 }
+  );
+}

src/modules/gameboard.js

@@ -1,15 +1,14 @@
 import * as firingArc from './game/firing_arc.js';
 import * as sightLine from './game/sight_line.js';
 import * as soldier from './game/soldier.js';
-import { Observable } from "./observable";
+import { Observable } from './observable';
+
+
+import { manualPan } from 'pan-zoom';
 
 let svg,
   placing = [];
 
-const top = {
-  collection: new Map()
-};
-
 const frontmostStore = new Map();
 
 function getCellContents(cell) {
@@ -194,6 +193,11 @@ function select(data) {
   if (isSelected || !data) return;
 
   counter.classList.add(soldier.getSelectedClass());
+  const gb = svg.querySelector('.gameboard');
+
+  // TODO check if counter is on board before calling
+  manualPan(gb, counter);
+
   firingArc.get(svg, counter).forEach(el => el.removeAttribute('clip-path'));
   placing.push(counter);
 }
@@ -215,8 +219,8 @@ export function start(el) {
   // For when the pointer leaves the window
   document.querySelector('object').addEventListener('pointerout', e => {
     if (clearHexDialog.open) return;
-    console.log('object pointerout');
-    console.log('Left map... CLEARING HOVERS');
+    //console.log('object pointerout');
+    //console.log('Left map... CLEARING HOVERS');
     svg.querySelectorAll('.hover').forEach(el => el.classList.remove('hover'));
 
     [...frontmost.children].forEach(child => {
@@ -236,7 +240,7 @@ export function start(el) {
 
     // Pointer moves outside the edge of the grid
     if (!targetCell) {
-      console.log('No target cell... CLEARING HOVERS');
+      //console.log('No target cell... CLEARING HOVERS');
       svg.querySelectorAll('.hover').forEach(el => el.classList.remove('hover'));
 
       [...frontmost.children].forEach(child => {
@@ -257,7 +261,7 @@ export function start(el) {
         // 's contents that is in frontmost, whose parent cell is not already highlighted
         !(targetCell.classList.contains('frontmost') && frontmostStore.get(e.target.closest('.frontmost > *')).classList.contains('hover'))
       ].every(e => e)) {
-        console.log('Target cell missing hover... CLEARING HOVERS AND ADDING TO TARGET CELL');
+        //console.log('Target cell missing hover... CLEARING HOVERS AND ADDING TO TARGET CELL');
         svg.querySelectorAll('.hover').forEach(el => el.classList.remove('hover'));
 
         if (placing[0]?.getAttributeNS(null, 'class') === 'mech-template') {
@@ -299,7 +303,7 @@ export function start(el) {
       getActiveSightLine(svg) && clearSightLine();
     }
 
-    console.log('frontmost contents', frontmost.children);
+    //console.log('frontmost contents', frontmost.children);
   });
 
   grid.addEventListener('click', clickHandler);
@@ -378,17 +382,24 @@ export function start(el) {
   //cell2.classList.add('hover');
   //
 
-  //soldier.place(
-  //  svg,
-  //  soldier.createCounter({ dataset: { allegiance: 'attacker', number: 2, squad: 1 }}, 'hsplaser'),
-  //  getCell(-2, 3, -1, 0)
-  //);
-  //
-  //soldier.place(
-  //  svg,
-  //  soldier.createCounter({ dataset: { allegiance: 'attacker', number: 2, squad: 5 }}, 'rifle'),
-  //  getCell(-3, 3, 0, 0)
-  //);
+  const trooper1 = soldier.createCounter({ dataset: { allegiance: 'attacker', number: 1, squad: 1 }}, 'blazer');
+
+
+  soldier.place(svg, trooper1, getCell(-3, 9, -6, 0));
+
+  soldier.place(
+    svg,
+    soldier.createCounter({ dataset: { allegiance: 'defender', number: 1, squad: 1 }}, 'blazer'),
+    getCell(1, -8, 7, 0)
+  );
+
+  const t1Rect = trooper1.getBoundingClientRect();
+
+  setTimeout(() => {
+    const t1Rect = trooper1.getBoundingClientRect();
+    console.log('trooper', trooper1, trooper1.getBoundingClientRect());
+
+  }, 10);
 
   // Add some counters in an unoccupied cell
   //const countersCell = getCell(-1, 1, 0, 0);

src/modules/pan-zoom.js

@@ -19,6 +19,9 @@ function addEventListeners(svg, el) {
       pan(svg, el, e), { passive: false };
     }
   });
+  svg.addEventListener('pointermove', e => {
+    console.log('clientX,clientY', `${e.clientX},${e.clientY}`);
+  });
 }
 
 function storePanZoomVal(transformMatrix) {