limit zoom

_.md

[ Launch: limit zoom ] 5148348 by enjalot
[ Launch: Tributary inlet ] 4617523 by enjalot
[ Launch: Tributary inlet ] 4617513 by enjalot

config.json

{"description":"limit zoom","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"test.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"thumbnail":"http://i.imgur.com/oaqk8dt.png"}

inlet.js

var svg = d3.select("svg");


var box = {
  x: 200,
  y: 200,
  width: 200,
  height: 200
};
//cache the values as starting points;
var x = box.x;
var y = box.y;
var bwidth = box.width;
var bheight = box.height;


var rect = svg.append("rect")
.attr({
  fill:"#A6E6E9",
  "fill-opacity": 0.5,
  stroke: "#1F2D92",
  "stroke-width":3,
  rx: 5
})
.attr(box)

var zoom = d3.behavior.zoom()
.on("zoom", function() {
  var translate = d3.event.translate;
  var scale = d3.event.scale;
  svg.select("text").text(translate + " " + scale)
  box.width = scale * bwidth;
  box.height = scale * bheight;
  
  //limit x in left direction
  var newx = x + translate[0];
  if(newx < 100) {
    newx = 100;
    zoom.translate([0, 0])
  }
  box.x = newx;
  box.y = y + translate[1];
  rect.attr(box);
})
svg.call(zoom);