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Resizing and Scalable Values #1

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7c42101
Resize; Non 360 Dependent
thuff Dec 12, 2012
751e2fc
Retina Support
thuff Dec 12, 2012
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107 changes: 84 additions & 23 deletions PieChart/piechart.html
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,36 +3,94 @@
<head>
<title>Pie Chart</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<script src="piechart.js"></script>
<style>
<style type="text/css">
.piechart{
display:block;
margin:0 auto;
}
</style>
<script>



// kick things off
window.onload = createPieChart;
window.onresize = createPieChart;

function sizeCanvas(scale){
if(scale == null){scale=100}
winW = window.innerWidth;
winW = winW * (scale/100);

var graphs = document.getElementsByClassName("piechart");
var numberOfGraphs = graphs.length;

if(window.devicePixelRatio == 2) { winW *= 2;
for(var i = 0; i < numberOfGraphs; i++){
graphs[i].style.width = scale + "%";
}
}

for(var i = 0; i < numberOfGraphs; i++){


graphs[i].width = winW;
graphs[i].height = winW;
}
}
function createPieChart() {

sizeCanvas(80);
//
// create a PieChart.
//
var pieChart = new PieChart( "piechart",
var globalMarketShare = new PieChart( "piechart",
{
includeLabels: true,
data: [120, 100, 140],
labels: ["120%", "100%", "140%"],
colors: [
["#FFDAB9", "#FFDAB9"],
["#E6E6FA", "#E6E6FA"],
["#E0FFFF", "#E0FFFF"]
]
data: [2.4, 2.6, 3.0, 5.3, 13.9, 72.4],
labels: ["Microsoft", "Symbian", "Bada", "Blackberry OS", "iOS", "Android", ],
colors: [
["#d37d66", "#ff0000"],
["#d3a166", "#ddeeff"],
["#4e75b5", "#E0FFFF"],
["#9164a4", "#ff0000"],
["#85bbe4", "#E6E6FA"],
["#74b616", "#E0FFFF"]
]

}
);

//
// nothing appears until you call draw().
//
pieChart.draw();
globalMarketShare.draw();
var androidGlobal = new PieChart( "piechart2",
{
includeLabels: true,
data: [10.3, 50.6, 27.5, 6.7],
labels: ["2.2 Froyo", "2.3.3 - 2.3.7 Gingerbread", "4.0.3 - 4.0.4 ICS", "4.1 - 4.2 Jelly Bean" ],
colors: [
["#00cc33", "#ff0000"],
["#00bb05", "#ddeeff"],
["#00aa66", "#E0FFFF"],
["#00dd34", "#ff0000"]
]

}
);
androidGlobal.draw();
var android4Global = new PieChart( "piechart3",
{
includeLabels: true,
data: [27.5, 5.9, .8],
labels: ["4.0 ICS", "4.1 Jelly Bean", "4.2 Jelly Bean" ],
colors: [
["#00cc33", "#ff0000"],
["#00bb05", "#ddeeff"],
["#00aa66", "#E0FFFF"]
]

}
);
android4Global.draw();

/*
* If you want to draw the labels separately, you can set
Expand All @@ -48,25 +106,28 @@
* If you want to select a segment to highight it, you can
* call select() for a given segment. Here's a little snippet
* that animates selecting each segment.
*
**
var segment = 0;
function nextSegment() {
pieChart.select(segment);
globalMarketShare.select(segment);
segment++;
if (segment < pieChart.data.length) {
if (segment < globalMarketShare.data.length) {
setTimeout(nextSegment, 1000);
}
}
setTimeout(nextSegment, 1000);
*/
setTimeout(nextSegment, 1000);*/

}
</script>
</head>
<body>

<canvas id="piechart" width="400" height="400">
<canvas id="piechart" class="piechart">
</canvas>
<canvas id="piechart2" class="piechart">
</canvas>
<canvas id="piechart3" class="piechart">
</canvas>


</body>
</html>
</html>
30 changes: 22 additions & 8 deletions PieChart/piechart.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,16 @@ function PieChart(id, o) {
this.includeLabels = o.includeLabels;
}
this.data = o.data ? o.data : [30, 70, 45, 65, 20, 130]; // in degrees

var dataLength = this.data.length,
totalCount = 0;
for(i = 0; i < dataLength; i++)
{
totalCount += this.data[i]
}
this.multiplier = 360/totalCount;


this.labels = o.labels ? o.labels : ["First", "Second", "Third", "Fourth", "Fifth", "Sixth"];
this.colors = o.colors ? o.colors : [
["#bbddb3", "#1d8e04"], // green
Expand All @@ -36,6 +46,7 @@ function PieChart(id, o) {
];

this.canvas = document.getElementById(id);

}

PieChart.prototype = {
Expand All @@ -49,20 +60,24 @@ PieChart.prototype = {
draw: function() {
var self = this;
var context = this.canvas.getContext("2d");
if(window.devicePixelRatio == 2) {context.scale(1,1);}
for (var i = 0; i < this.data.length; i++) {
this.drawSegment(this.canvas, context, i, this.data[i], false, this.includeLabels);
}
},

drawSegment: function(canvas, context, i, size, isSelected, includeLabels) {
size *= this.multiplier;
var self = this;
context.save();
var centerX = Math.floor(canvas.width / 2);
var centerY = Math.floor(canvas.height / 2);
radius = Math.floor(canvas.width / 2);

var startingAngle = self.degreesToRadians(self.sumTo(self.data, i));
startingAngle *= this.multiplier;
var arcSize = self.degreesToRadians(size);

var endingAngle = startingAngle + arcSize;

context.beginPath();
Expand All @@ -73,7 +88,7 @@ PieChart.prototype = {
isSelected ?
context.fillStyle = self.colors[i][1] :
context.fillStyle = self.colors[i][0];

context.fill();
context.restore();

Expand All @@ -87,16 +102,16 @@ PieChart.prototype = {
context.save();
var x = Math.floor(canvas.width / 2);
var y = Math.floor(canvas.height / 2);
var angle = self.degreesToRadians(self.sumTo(self.data, i));

var angle = self.degreesToRadians(self.sumTo(self.data, i)*this.multiplier);
context.translate(x, y);
context.rotate(angle);
context.textAlign = "right";
var fontSize = Math.floor(canvas.height / 25);
var fontSize = Math.floor(canvas.height / 30);
context.font = fontSize + "pt Helvetica";

var dx = Math.floor(canvas.width * 0.5) - 10;
var dy = Math.floor(canvas.height * 0.05);
var dy = Math.floor(canvas.height * 0.04);
context.fillText(self.labels[i], dx, dy);

context.restore();
Expand All @@ -106,7 +121,7 @@ PieChart.prototype = {
var self = this;
var context = this.canvas.getContext("2d");
var size = self.data[i];

size *= this.multiplier;
self.drawSegmentLabel(this.canvas, context, i, size, false);
},

Expand All @@ -125,4 +140,3 @@ PieChart.prototype = {


}