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Added Resizing Support #36

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Added Resizing Support #36

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e48357c
Added Resizing Support
Apr 27, 2018
82a3e26
Returning this after resize
Apr 27, 2018
07b8443
Removed auto draw after clear because it was not in scope
Apr 27, 2018
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
node_modules/
38 changes: 28 additions & 10 deletions demo/index.html
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Expand Up @@ -3,28 +3,35 @@
<head>
<title>simpleheat demo</title>
<style>
body { text-align: center; font: 16px/1.4 "Helvetica Neue", Arial, sans-serif; }
body { text-align: center; font: 16px/1.4 "Helvetica Neue", Arial, sans-serif; min-width:600px;}
a { color: #0077ff; }
.container { width: 1000px; height: 600px; margin: 0 auto; position: relative; border: 1px solid #ccc; }
.options { position: absolute; top: 0; right: 0; padding: 10px; background: rgba(255,255,255,0.6);
border-bottom: 1px solid #ccc; border-left: 1px solid #ccc; line-height: 1; }
.options { position: absolute; top: 0; left: 0; padding: 10px; background: rgba(255,255,255,0.6);
border-bottom: 1px solid #ccc; border: 1px solid #ccc; line-height: 1; }
.options input { width: 200px; }
.options label { width: 60px; float: left; text-align: right; margin-right: 10px; color: #555; }
.ghbtns { position: relative; top: 4px; margin-left: 5px; }
.promo {width:40%;float:right;min-height:70px;}
</style>
</head>
<body>
<p>

<p class="promo">
<strong>simpleheat</strong> is a tiny and fast JS heatmap library.
More on <a href="https://github.com/mourner/simpleheat">mourner / simpleheat</a>
<iframe class="ghbtns" src="http://ghbtns.com/github-btn.html?user=mourner&amp;repo=simpleheat&amp;type=watch&amp;count=true"
allowtransparency="true" frameborder="0" scrolling="0" width="90" height="20"></iframe>
</p>
<div class="container">
<div class="options">
<label>Radius </label><input type="range" id="radius" value="25" min="10" max="50" /><br />
<label>Blur </label><input type="range" id="blur" value="15" min="10" max="50" />
</div>
<div style="clear:both"></div>

<div class="options">
<label>Radius </label><input type="range" id="radius" value="25" min="10" max="50" /><br />
<label>Blur </label><input type="range" id="blur" value="15" min="10" max="50" /> <br/>
<label>Width </label><input type="range" id="width" value="1000" min="100" max="2000" /><br/>
<label>Height </label><input type="range" id="height" value="600" min="100" max="2000" />
</div>

<div id="container" class="container">
<canvas id="canvas" width="1000" height="600"></canvas>
</div>

Expand All @@ -48,7 +55,6 @@
console.timeEnd('draw');
frame = null;
}

draw();

get('canvas').onmousemove = function (e) {
Expand All @@ -58,13 +64,25 @@

var radius = get('radius'),
blur = get('blur'),
width = get('width'),
height = get('height'),
changeType = 'oninput' in radius ? 'oninput' : 'onchange';

radius[changeType] = blur[changeType] = function (e) {
heat.radius(+radius.value, +blur.value);
frame = frame || window.requestAnimationFrame(draw);
};

width[changeType] = height[changeType] = function (e) {
var container = get('container');
var canvas = get('canvas');
canvas.width = width.value;
canvas.height = height.value;
container.style.width = width.value + "px";
container.style.height = height.value + "px";
heat.resize();
}

</script>
</body>
</html>
15 changes: 15 additions & 0 deletions simpleheat.js
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Expand Up @@ -70,8 +70,23 @@ simpleheat.prototype = {
},

resize: function () {
var canvasWidth = parseInt(this._canvas.width,10);
var canvasHeight = parseInt(this._canvas.height,10);
var self = this;
if (this._data != null) {
this._data = this._data.map(function(point) {
return [
point[0]*canvasWidth/self._width,
point[1]*canvasHeight/self._height,
point[2]]
})
}

this._width = this._canvas.width;
this._height = this._canvas.height;
this.draw();

return this;
},

gradient: function (grad) {
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