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@HarryStevens
Last active Oct 31, 2016
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What would you like to do?
Fun with Linear Gradients I
license: gpl-3.0
<html>
<head>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/spectrum/1.8.0/spectrum.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/fonts/FontAwesome.otf" />
<link rel="stylesheet" href="styles.css" />
</head>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/spectrum/1.8.0/spectrum.min.js"></script>
<script src="scripts.js"></script>
</body>
</html>
var width = window.innerWidth, height = window.innerHeight;
var colors = ["#00fdff", "#ff0083"];
var position = [[.25, .25],[.75, .75]];
d3.select("body").append("div")
.attr("class","controls");
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
svg.append("rect")
.attr("class", "gradient-rectangle")
.attr("x", "0")
.attr("y", "0")
.attr("width", width)
.attr("height", height);
var defs = svg.append("defs");
var gradient = defs.append("linearGradient")
.attr("id", "linear-gradient");
// change orientation
changeOrientation(position);
var radius = 20;
position.forEach(function(d, i){
var offset = [];
i == 0 ? offset = [radius,-radius/2] : offset = [-radius,-radius/2];
svg.append("circle")
.attr("class", "position-circle")
.attr("data-which", i)
.attr("cx", width * position[i][0] + offset[0])
.attr("cy", height * position[i][1] + offset[1])
.attr("r", radius)
.call(d3.drag(d)
.on("drag", function(){
var x = d3.event.x, y = d3.event.y;
d3.select(this).attr("cx", x);
d3.select(this).attr("cy", y);
if (d3.select(this).attr("data-which") == 0) {
position[0][0] = x / width;
position[0][1] = y / height;
} else {
position[1][0] = x / width;
position[1][1] = y / height;
}
changeOrientation(position);
}));
});
//change colors
colors.forEach(function(d, i){
gradient.append("stop")
.attr("class", "stop-" + i);
$(".controls").append("<div class='spectrum' id='spectrum-" + i + "'></div>");
$("#spectrum-" + i).spectrum({
flat: true,
color: colors[i],
preferredFormat: "hex",
showInitial: true,
showInput: true,
move: function(color){
colors[i] = color;
changeColors(colors);
}
});
});
changeColors(colors);
$(".controls").css("left", width / 2 - $(".sp-container").width());
$(".sp-container").hide();
$(".controls").append("<div class='hide-show'><i class='fa fa-caret-down' aria-hidden='true'></i></div>");
$(".hide-show").css({
"top": $(".controls").height(),
"left": $(".sp-container").width() - ( $(".hide-show").width() / 2 )
});
$(".hide-show").click(function(){
if ($(".sp-container").hasClass("show")){
$(".sp-container").hide().removeClass("show");
$(this).html("<i class='fa fa-caret-down' aria-hidden='true'></i>").css("top", 0);
} else {
$(".sp-container").show().addClass("show");
$(this).html("<i class='fa fa-caret-up' aria-hidden='true'></i>").css("top", $(".controls").height());
}
});
// functions
function changeOrientation(position){
gradient
.attr("x1", position[0][0] * 100 + "%")
.attr("y1", position[0][1] * 100 + "%")
.attr("x2", position[1][0] * 100 + "%")
.attr("y2", position[1][1] * 100 + "%");
}
function changeColors(colors){
colors.forEach(function(d, i){
d3.select(".stop-" + i)
.attr("offset", i * 100 + "%")
.attr("stop-color", colors[i]);
});
d3.select(".gradient-rectangle")
.style("fill", "url(#linear-gradient)");
}
body {
margin: 0;
}
.controls, .hide-show {
position: absolute;
}
.hide-show {
width: 30px;
text-align: center;
cursor: pointer;
}
.hide-show, .sp-container {
border: 1px solid #eee;
background-color: #fff;
}
.sp-palette-row-initial span.sp-thumb-el:first-of-type, .sp-button-container {
display: none !important;
}
.sp-initial span {
width: 170px;
}
.sp-input-container {
width: 172px;
}
.sp-container input {
font-family: "Helvetica Neue", sans-serif;
}
.position-circle {
stroke: #000;
stroke-width: 2px;
fill: #3a403d;
cursor: all-scroll;
}
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