This is the code for Chapter 12, Figure 2 from D3.js in Action which requires a touch interface (or emulator) to see any effect. This example uses d3.touches() to list the XY coordinates of the touch events.
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Ch. 12, Fig. 2 - D3.js in Action
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<html> | |
<head> | |
<title>D3 in Action Chapter 12 - Example 1</title> | |
<meta charset="utf-8" /> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
</head> | |
<style> | |
body, html { | |
width: 100%; | |
height: 100%; | |
} | |
#vizcontainer { | |
width: 100%; | |
height: 100%; | |
} | |
#touchStatus { | |
position: absolute; | |
top: 0px; | |
left: 0px; | |
} | |
svg { | |
width: 100%; | |
height: 100%; | |
} | |
</style> | |
<body> | |
<div id="vizcontainer"> | |
<svg></svg> | |
</div> | |
</body> | |
<footer> | |
<script> | |
d3.select("#vizcontainer").append("div").attr("id", "touchStatus").append("p").html("Touch Status:").append("ol"); | |
d3.select("svg").on("touchstart", touchStatus); | |
d3.select("svg").on("touchmove", touchStatus); | |
function touchStatus() { | |
d3.event.preventDefault(); | |
d3.event.stopPropagation(); //#c | |
d = d3.touches(this); | |
d3.select("#touchStatus").select("ol").selectAll("li").data(d).enter() //#d | |
.append("li"); | |
d3.select("#touchStatus").select("ol").selectAll("li").data(d).exit() //#e | |
.remove(); | |
d3.select("#touchStatus").select("ol").selectAll("li").html(function(d) { | |
return d3.event.type + d; | |
}); //#f | |
}; | |
</script> | |
</footer> | |
</html> |
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