mirror of https://github.com/placeAtlas/atlas.git
425 lines
9.3 KiB
JavaScript
425 lines
9.3 KiB
JavaScript
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/*
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========================================================================
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The /r/place Atlas
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An Atlas of Reddit's /r/place, with information to each
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artwork of the canvas provided by the community.
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Copyright (C) 2017 Roland Rytz <roland@draemm.li>
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Licensed under the GNU Affero General Public License Version 3
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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For more information, see:
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https://draemm.li/various/place-atlas/license.txt
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========================================================================
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*/
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var innerContainer = document.getElementById("innerContainer");
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var container = document.getElementById("container");
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var canvas = document.getElementById("highlightCanvas");
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var context = canvas.getContext("2d");
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var zoom = 1;
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if(window.devicePixelRatio){
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zoom = 1/window.devicePixelRatio;
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}
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var maxZoom = 128;
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var minZoom = 0.1;
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var zoomOrigin = [0, 0];
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var scaleZoomOrigin = [0, 0];
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var dragging = false;
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var lastPosition = [0, 0];
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var viewportSize = [0, 0];
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document.getElementById("donateButton").addEventListener("click", function(e){
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document.getElementById("bitcoinQR").src = "./_img/bitcoinQR.png?from=index";
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document.getElementById("donateOverlay").style.display = "flex";
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});
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document.getElementById("closeBitcoinButton").addEventListener("click", function(e){
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document.getElementById("donateOverlay").style.display = "none";
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});
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function applyView(){
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//console.log(zoomOrigin, scaleZoomOrigin);
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//console.log(scaleZoomOrigin[0]);
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scaleZoomOrigin[0] = Math.max(-500, Math.min(500, scaleZoomOrigin[0]));
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scaleZoomOrigin[1] = Math.max(-500, Math.min(500, scaleZoomOrigin[1]));
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zoomOrigin = [scaleZoomOrigin[0]*zoom, scaleZoomOrigin[1]*zoom];
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innerContainer.style.height = (~~(zoom*1000))+"px";
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innerContainer.style.width = (~~(zoom*1000))+"px";
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innerContainer.style.left = ~~(container.clientWidth/2 - innerContainer.clientWidth/2 + zoomOrigin[0] + container.offsetLeft)+"px";
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innerContainer.style.top = ~~(container.clientHeight/2 - innerContainer.clientHeight/2 + zoomOrigin[1] + container.offsetTop)+"px";
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}
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init();
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function init(){
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//console.log(document.documentElement.clientWidth, document.documentElement.clientHeight);
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zoomOrigin = [0, 0];
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applyView();
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var initialPinchDistance = 0;
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var initialPinchZoom = 0;
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var initialPinchZoomOrigin = [0, 0];
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var desiredZoom;
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var zoomAnimationFrame;
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var mode = "view";
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var args = window.location.search;
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if(args){
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mode = args.split("mode=")[1];
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if(mode){
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mode = mode.split("&")[0];
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} else {
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mode = "view";
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}
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}
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if(mode == "view"){
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wrapper.className = wrapper.className.replace(/ drawMode/g, "");
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initView();
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} else if(mode=="draw"){
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wrapper.className += " draw";
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initDraw();
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} else if(mode=="about"){
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window.location = "./about.html";
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} else if(mode=="overlap"){
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wrapper.className = wrapper.className.replace(/ drawMode/g, "");
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if(initOverlap){
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initOverlap();
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}
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}
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document.getElementById("loading").style.display = "none";
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document.getElementById("zoomInButton").addEventListener("click", function(e){
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/*if(zoomAnimationFrame){
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window.cancelAnimationFrame(zoomAnimationFrame);
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}*/
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var x = container.clientWidth/2;
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var y = container.clientHeight/2;
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initialPinchZoomOrigin = [
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scaleZoomOrigin[0],
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scaleZoomOrigin[1]
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];
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initialPinchZoom = zoom;
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lastPosition = [x, y];
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zoom = zoom * 2;
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zoom = Math.max(minZoom, Math.min(maxZoom, zoom));
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applyZoom(x, y, zoom);
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});
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document.getElementById("zoomOutButton").addEventListener("click", function(e){
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/*if(zoomAnimationFrame){
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window.cancelAnimationFrame(zoomAnimationFrame);
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}*/
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var x = container.clientWidth/2;
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var y = container.clientHeight/2;
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initialPinchZoomOrigin = [
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scaleZoomOrigin[0],
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scaleZoomOrigin[1]
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];
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initialPinchZoom = zoom;
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lastPosition = [x, y];
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zoom = zoom / 2;
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zoom = Math.max(minZoom, Math.min(maxZoom, zoom));
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applyZoom(x, y, zoom);
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});
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document.getElementById("zoomResetButton").addEventListener("click", function(e){
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zoom = 1;
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zoomOrigin = [0, 0];
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scaleZoomOrigin = [0, 0];
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updateLines();
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applyView();
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});
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container.addEventListener("dblclick", function(e){
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/*if(zoomAnimationFrame){
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window.cancelAnimationFrame(zoomAnimationFrame);
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}*/
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var x = e.clientX - container.offsetLeft;
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var y = e.clientY - container.offsetTop;
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initialPinchZoomOrigin = [
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scaleZoomOrigin[0],
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scaleZoomOrigin[1]
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];
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initialPinchZoom = zoom;
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lastPosition = [x, y];
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if(e.ctrlKey){
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zoom = zoom / 2;
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} else {
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zoom = zoom * 2;
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}
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zoom = Math.max(minZoom, Math.min(maxZoom, zoom));
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applyZoom(x, y, zoom);
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e.preventDefault();
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});
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container.addEventListener("wheel", function(e){
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/*if(zoomAnimationFrame){
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window.cancelAnimationFrame(zoomAnimationFrame);
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}*/
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var x = e.clientX - container.offsetLeft;
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var y = e.clientY - container.offsetTop;
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initialPinchZoomOrigin = [
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scaleZoomOrigin[0],
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scaleZoomOrigin[1]
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];
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initialPinchZoom = zoom;
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lastPosition = [x, y];
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if(e.deltaY > 0){
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zoom = zoom / 2;
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} else if(e.deltaY < 0){
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zoom = zoom * 2;
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}
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zoom = Math.max(minZoom, Math.min(maxZoom, zoom));
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applyZoom(x, y, zoom);
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e.preventDefault();
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});
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/*function setDesiredZoom(x, y, target){
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zoom = (zoom*2 + target)/3;
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//console.log(zoom);
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if(Math.abs(1 - zoom/target) <= 0.01){
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zoom = target;
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}
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applyZoom(x, y, zoom);
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if(zoom != target){
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zoomAnimationFrame = window.requestAnimationFrame(function(){
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setDesiredZoom(x, y, target);
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});
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}
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}*/
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container.addEventListener("mousedown", function(e){
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mousedown(e.clientX, e.clientY);
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e.preventDefault();
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});
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container.addEventListener("touchstart", function(e){
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if(e.touches.length == 2){
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e.preventDefault();
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}
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touchstart(e);
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});
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function mousedown(x, y){
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lastPosition = [x, y];
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dragging = true;
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}
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function touchstart(e){
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if(e.touches.length == 1){
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mousedown(e.touches[0].clientX, e.touches[0].clientY);
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} else if(e.touches.length == 2){
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initialPinchDistance = Math.sqrt(
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Math.pow(e.touches[0].clientX - e.touches[1].clientX, 2)
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+ Math.pow(e.touches[0].clientY - e.touches[1].clientY, 2)
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);
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initialPinchZoom = zoom;
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initialPinchZoomOrigin = [
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scaleZoomOrigin[0],
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scaleZoomOrigin[1]
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];
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mousedown(
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(e.touches[0].clientX + e.touches[1].clientX)/2,
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(e.touches[0].clientY + e.touches[1].clientY)/2
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);
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}
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}
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window.addEventListener("mousemove", function(e){
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updateLines();
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mousemove(e.clientX, e.clientY);
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if(dragging){
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e.preventDefault();
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}
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});
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window.addEventListener("touchmove", function(e){
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if(e.touches.length == 2 || e.scale > 1){
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e.preventDefault();
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}
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touchmove(e);
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},
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{passive: false}
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);
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function mousemove(x, y){
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if(dragging){
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var deltaX = x - lastPosition[0];
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var deltaY = y - lastPosition[1];
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lastPosition = [x, y];
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zoomOrigin[0] += deltaX;
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zoomOrigin[1] += deltaY;
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scaleZoomOrigin[0] += deltaX/zoom;
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scaleZoomOrigin[1] += deltaY/zoom;
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previousZoomOrigin = [zoomOrigin[0], zoomOrigin[1]];
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previousScaleZoomOrigin = [scaleZoomOrigin[0], scaleZoomOrigin[1]];
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updateLines();
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applyView();
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}
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}
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function touchmove(e){
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updateLines();
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if(e.touches.length == 1){
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mousemove(e.touches[0].clientX, e.touches[0].clientY);
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} else if(e.touches.length == 2){
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var newPinchDistance = Math.sqrt(
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Math.pow(e.touches[0].clientX - e.touches[1].clientX, 2)
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+ Math.pow(e.touches[0].clientY - e.touches[1].clientY, 2)
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);
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zoom = initialPinchZoom * newPinchDistance / initialPinchDistance;
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var x = (e.touches[0].clientX + e.touches[1].clientX)/2 - container.offsetLeft;
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var y = (e.touches[0].clientY + e.touches[1].clientY)/2 - container.offsetTop;
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applyZoom(x, y, zoom);
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}
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}
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function applyZoom(x, y, zoom){
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var deltaX = x - lastPosition[0];
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var deltaY = y - lastPosition[1];
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var pinchTranslateX = (x - container.clientWidth/2 - deltaX);
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var pinchTranslateY = (y - container.clientHeight/2 - deltaY);
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scaleZoomOrigin[0] = initialPinchZoomOrigin[0] + deltaX/zoom + pinchTranslateX/zoom - pinchTranslateX/initialPinchZoom;
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scaleZoomOrigin[1] = initialPinchZoomOrigin[1] + deltaY/zoom + pinchTranslateY/zoom - pinchTranslateY/initialPinchZoom;
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zoomOrigin[0] = scaleZoomOrigin[0]*zoom;
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zoomOrigin[1] = scaleZoomOrigin[1]*zoom;
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applyView();
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updateLines();
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}
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window.addEventListener("mouseup", function(e){
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if(dragging){
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e.preventDefault();
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}
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mouseup(e.clientX, e.clientY);
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});
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window.addEventListener("touchend", touchend);
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function mouseup(x, y){
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if(dragging){
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dragging = false;
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}
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}
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function touchend(e){
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if(e.touches.length == 0){
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mouseup();
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} else if(e.touches.length == 1){
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initialPinchZoom = zoom;
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lastPosition = [e.touches[0].clientX, e.touches[0].clientY];
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}
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}
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window.addEventListener("resize", function(){
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//console.log(document.documentElement.clientWidth, document.documentElement.clientHeight);
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applyView();
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});
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}
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