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test-stacks-2.html
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test-stacks-2.html
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<html>
<head>
<script src="https://cdn.firebase.com/js/client/1.0.15/firebase.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.1/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/ui/1.11.1/jquery-ui.js"></script>
<link rel="stylesheet" type="text/css" href="example.css">
<link href="style.css" rel="stylesheet" type="text/css" media="all">
<style>
#canvasStack {
position: relative;
width: 1080px;
height: 620px;
}
canvas {
position: absolute;
top: 0px;
left: 0px;
}
.hidden {
display:none;
}
</style>
<script>
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
</script>
</head>
<body>
<div id="canvasStack"></div>
<div class="l-demo-container" id='l-demo-container'>
<canvas id="drawing-canvas" width="1080" height="620" style="z-index:0"></canvas>
</div>
<div id="colorholder"></div>
<script>
$(document).ready(function () {
var canvasStack = document.getElementById('l-demo-container');
var count = 0;
var canvasArray = [];
var maxtime = 0;
event.preventDefault();
//Set up some globals
var lastPoint = null;
currentColor = "000";
mouseDown = 0;
xy = "";
brushStyle = "solid";
pixSize = 10;
$(function() {
$( "#slider" ).slider({
value: pixSize,
min:1,
max:50,
orientation: "horizontal",
range: "min",
animate: true,
slide: function( event, ui ) {
pixSize = $( "#slider" ).slider( "value" );
$('#brushWidth').val(pixSize);
}
});
});
//Create a reference to the pixel data for our drawing.
var pixelDataRef = new Firebase('https://draw-with-me.firebaseio.com/');
// Set up our canvas
var initialize = function(){
myCanvas = document.getElementById('drawing-canvas');
myContext = myCanvas.getContext ? myCanvas.getContext('2d') : null;
if (myContext == null) {
alert("You must use a browser that supports HTML5 Canvas to run this demo.");
return;
}
}
initialize();
//Setup each color palette & add it to the screen
var colors = ["fff","000","f00","0f0","00f","88f","f8d","f88","f05","f80","0f8","cf0","08f","408","ff8","8ff"];
for (c in colors) {
var item = $('<div/>').css("background-color", '#' + colors[c]).addClass("colorbox");
item.click((function () {
var col = colors[c];
return function () {
currentColor = col;
};
})());
item.appendTo('#colorholder');
}
//Keep track of if the mouse is up or down
$(document).on('mousedown', '#drawing-canvas', function(){
mouseDown = 1;
});
// myCanvas.onmousedown = function () {mouseDown = 1;};
// Haphazardly declaring variables.
var zindex = 1; // just kidding. Don't delete me.
$(document).on('mouseup', '#drawing-canvas', function(){
// console.log($(this));
// lineVisible++;
// layerid = "layer" + (line_number - 1);
// $('#drawing-canvas').attr('id', layerid);
// canvas = document.createElement('canvas');
// canvasStack.appendChild(canvas);
// var el = $('#l-demo-container').find('canvas').last();
// el.attr('id', "drawing-canvas");
// el.css('z-index',line_number);
// canvas.width = 1080;
// canvas.height = 620;
// zindex += 1;
// last_line_number = line_number;
lineVisible++;
// console.log(lineVisible);
pixelDataRef.child('lineVisible').set(lineVisible);
cur_line_num++;
// console.log(cur_line_num);
pixelDataRef.child('cur_line_num').set(cur_line_num);
// myCanvas.onmouseout = myCanvas.onmouseup = function () {
// Change current canvas id to layerzindex
layerid = "layer" + (last_line_number);
$('#drawing-canvas').attr('id', layerid);
canvas = document.createElement('canvas');
canvasStack.appendChild(canvas);
$('#l-demo-container').find('canvas').last().attr('id', "drawing-canvas");
$('#l-demo-container').find('canvas').last().css('z-index', cur_line_num);
canvas.width = 1080;
canvas.height = 620;
zindex += 1;
myContext = myCanvas.getContext ? myCanvas.getContext('2d') : null;
myCanvas = document.getElementById('drawing-canvas');
mouseDown = 0; lastPoint = null;
pixelDataRef.child('priorityCounter').set(priorityCounter);
/* pixelDataRef.child(cur_line_num).set({color:currentColor, pixSize:pixSize, brushStyle:brushStyle}); */
// myCanvas = document.getElementById('drawing-canvas');
// };
});
pixelDataRef.child('priorityCounter').once('value', function(snapshot) {
if (snapshot.val() === null) {
priorityCounter = 1;
pixelDataRef.child('priorityCounter').set(priorityCounter);
} else {
priorityCounter = snapshot.val();
console.log(priorityCounter);
}
});
pixelDataRef.child('cur_line_num').once('value', function(snapshot) {
if (snapshot.val() === null) {
cur_line_num = 1;
pixelDataRef.child('cur_line_num').set(cur_line_num);
} else {
cur_line_num = snapshot.val();
console.log(cur_line_num);
}
});
pixelDataRef.child('lineVisible').once('value', function(snapshot) {
if (snapshot.val() === null) {
lineVisible = 1;
pixelDataRef.child('lineVisible').set(lineVisible);
} else {
lineVisible = snapshot.val();
console.log(lineVisible);
}
});
/* console.log("a"+ pixSize); */
function getWidthSlider() {
pixSize = $( "#slider" ).slider( "option", "value" );
return pixSize;
};
//Draw a line from the mouse's last position to its current position
var drawLineOnMouseMove = function(e) {
if (!mouseDown) return;
console.log("md "+ mouseDown);
// e.preventDefault();
// Bresenham's line algorithm. We use this to ensure smooth lines are drawn
var offset = $('canvas').offset();
var x1 = Math.floor((e.pageX - offset.left)),
y1 = Math.floor((e.pageY - offset.top));
var x0 = (lastPoint == null) ? x1 : lastPoint[0];
var y0 = (lastPoint == null) ? y1 : lastPoint[1];
var dx = Math.abs(x1 - x0), dy = Math.abs(y1 - y0);
var sx = (x0 < x1) ? 1 : -1, sy = (y0 < y1) ? 1 : -1, err = dx - dy;
while (true) {
//write the pixel into Fi=currebase, or if we are drawing white, remove the pixel
xy = x0 + ":" + y0 + ":" + cur_line_num;
xy = xy.toString();
pixSize = getWidthSlider();
var info_dict = {currentColor:currentColor, pixSize:pixSize, brushStyle:brushStyle, display: "initial"};
/*
console.log("a"+ currentColor);
console.log("a"+ pixSize);
console.log("a"+ brushStyle);
*/
pixelDataRef.child(xy).setWithPriority(info_dict, priorityCounter);
priorityCounter++;
if (x0 == x1 && y0 == y1) break;
var e2 = 2 * err;
if (e2 > -dy) {
err = err - dy;
x0 = x0 + sx;
}
if (e2 < dx) {
err = err + dx;
y0 = y0 + sy;
}
}
lastPoint = [x1, y1];
};
$(document).on('mousemove', '#drawing-canvas', function(e){
drawLineOnMouseMove(e);
});
$(document).on('mousedown', '#drawing-canvas', function(e){
drawLineOnMouseMove(e);
});
// $('#drawing-canvas').mousemove(drawLineOnMouseMove);
// $('#drawing-canvas').mousedown(drawLineOnMouseMove);
// Add callbacks that are fired any time the pixel data changes and adjusts the canvas appropriately.
// Note that child_added events will be fired for initial pixel data as well.
last_line_number = 1;
var drawPixel = function(snapshot) {
if (snapshot.name() === "cur_line_num" && snapshot.val() > 1) {
console.log("b "+snapshot.val());
lineVisible++;
layerid = "layer" + (line_number - 1);
$('#drawing-canvas').attr('id', layerid);
canvas = document.createElement('canvas');
canvasStack.appendChild(canvas);
var el = $('#l-demo-container').find('canvas').last();
el.attr('id', "drawing-canvas");
el.css('z-index',line_number);
canvas.width = 1080;
canvas.height = 620;
zindex += 1;
};
var coords = snapshot.name().split(":");
if (!isNaN(coords[0])) {
line_number = parseInt(coords[2]);
console.log('last '+last_line_number);
console.log('cur '+line_number);
if (line_number > last_line_number) {
lineVisible++;
layerid = "layer" + (line_number - 1);
$('#drawing-canvas').attr('id', layerid);
canvas = document.createElement('canvas');
canvasStack.appendChild(canvas);
var el = $('#l-demo-container').find('canvas').last();
el.attr('id', "drawing-canvas");
el.css('z-index',line_number);
canvas.width = 1080;
canvas.height = 620;
zindex += 1;
if (snapshot.val().display === "hidden") {
el.addClass('hidden');
} else {
el.removeClass('hidden');
};
}
myContext = myCanvas.getContext ? myCanvas.getContext('2d') : null;
myContext.fillStyle = "#" + snapshot.val().currentColor;
pixSize = snapshot.val().pixSize;
brushStyle = snapshot.val().brushStyle;
x00 = parseInt(coords[0]);
y00 = parseInt(coords[1]);
myContext.fillRect(x00, y00, pixSize, pixSize);
myCanvas = document.getElementById('drawing-canvas');
last_line_number = line_number;
}
};
$('#undo').on('click', function() {
// if (lineVisible >= cur_line_num) {
// return;
// }
//line_number = style:display:none
//line_number-- = or into array?
// var layerHide = 'layer' + (lineVisible-2)
hideElement = document.getElementById(('layer' + (lineVisible-1)));
$(hideElement).addClass('hidden');
lineVisible--;
console.log(lineVisible+"-");
pixelDataRef.child('lineVisible').set(lineVisible);
});
$('#redo').on('click', function() {
// if (lineVisible >= cur_line_num) {
// return;
// }
showElement = document.getElementById(('layer' + (lineVisible)));
$(showElement).removeClass('hidden');
lineVisible++;
console.log(lineVisible+"+");
pixelDataRef.child('lineVisible').set(lineVisible);
});
var clearPixel = function(snapshot) {
console.log("shouldn't be here");
var coords = snapshot.name().split(":");
if (isNaN(snapshot.val()[1])) {
pixSize = 1;
} else {
pixSize = snapshot.val()[1];
}
if (pixSize > 1) {
for (var i = 0; i < pixSize; i++) {
for (var j = 0; j < pixSize; j++) {
x0 += i;
y0 += j;
myContext.fillRect(parseInt(coords[0]), parseInt(coords[1]), 1, 1);
}
}
}
myContext.clearRect(parseInt(coords[0]), parseInt(coords[1]), pixSize, pixSize);
};
pixelDataRef.on('child_added', drawPixel);
pixelDataRef.on('child_changed', drawPixel);
pixelDataRef.on('child_removed', clearPixel);
});
</script>
<div id="slider" style="width:250px; margin:15px;"><br>
Brush Width: <input type="text" id="brushWidth" value="1" readonly style="border:0; color:#341f07; font-weight:bold;">
</div>
<button id="undo">Undo</button>
<button id="redo">Redo</button>
</body>
</html>