103 lines
2.5 KiB
JavaScript
103 lines
2.5 KiB
JavaScript
import { app } from "../../scripts/app.js";
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let touchZooming;
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let touchCount = 0;
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app.registerExtension({
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name: "Comfy.SimpleTouchSupport",
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setup() {
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let zoomPos;
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let touchTime;
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let lastTouch;
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function getMultiTouchPos(e) {
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return Math.hypot(e.touches[0].clientX - e.touches[1].clientX, e.touches[0].clientY - e.touches[1].clientY);
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}
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app.canvasEl.addEventListener(
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"touchstart",
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(e) => {
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touchCount++;
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lastTouch = null;
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if (e.touches?.length === 1) {
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// Store start time for press+hold for context menu
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touchTime = new Date();
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lastTouch = e.touches[0];
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} else {
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touchTime = null;
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if (e.touches?.length === 2) {
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// Store center pos for zoom
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zoomPos = getMultiTouchPos(e);
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app.canvas.pointer_is_down = false;
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}
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}
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},
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true
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);
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app.canvasEl.addEventListener("touchend", (e) => {
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touchZooming = false;
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touchCount = e.touches?.length ?? touchCount - 1;
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if (touchTime && !e.touches?.length) {
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if (new Date() - touchTime > 600) {
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try {
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// hack to get litegraph to use this event
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e.constructor = CustomEvent;
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} catch (error) {}
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e.clientX = lastTouch.clientX;
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e.clientY = lastTouch.clientY;
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app.canvas.pointer_is_down = true;
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app.canvas._mousedown_callback(e);
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}
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touchTime = null;
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}
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});
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app.canvasEl.addEventListener(
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"touchmove",
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(e) => {
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touchTime = null;
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if (e.touches?.length === 2) {
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app.canvas.pointer_is_down = false;
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touchZooming = true;
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LiteGraph.closeAllContextMenus();
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app.canvas.search_box?.close();
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const newZoomPos = getMultiTouchPos(e);
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const midX = (e.touches[0].clientX + e.touches[1].clientX) / 2;
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const midY = (e.touches[0].clientY + e.touches[1].clientY) / 2;
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let scale = app.canvas.ds.scale;
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const diff = zoomPos - newZoomPos;
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if (diff > 0.5) {
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scale *= 1 / 1.07;
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} else if (diff < -0.5) {
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scale *= 1.07;
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}
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app.canvas.ds.changeScale(scale, [midX, midY]);
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app.canvas.setDirty(true, true);
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zoomPos = newZoomPos;
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}
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},
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true
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);
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},
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});
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const processMouseDown = LGraphCanvas.prototype.processMouseDown;
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LGraphCanvas.prototype.processMouseDown = function (e) {
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if (touchZooming || touchCount) {
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return;
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}
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return processMouseDown.apply(this, arguments);
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};
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const processMouseMove = LGraphCanvas.prototype.processMouseMove;
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LGraphCanvas.prototype.processMouseMove = function (e) {
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if (touchZooming || touchCount > 1) {
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return;
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}
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return processMouseMove.apply(this, arguments);
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};
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