Drag practice

_.md

[ Launch: Drag practice ] 6192464 by tarvaina

config.json

{"description":"Drag practice","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"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/GyWsjMW.png"}

inlet.js

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

var bg = svg.append("rect")
  .attr({
    x: 0,
    y: 0,
    width: "100%",
    height: "100%"
  });

var crosshairX = 422;
var crosshairY = 352;
var crosshairWidth = 10;
var barColor = "#ABCCBF";
var lightUpDuration = 1000;
var lightDownDuration = 1000;
var lightUpColor = "#355548";

var ybar = svg.append("rect").attr({
  x: crosshairX,
  y: crosshairY,
  width: crosshairWidth,
  height: 0,
  fill: "#000"
});


var xbar = svg.append("rect").attr({
  x: crosshairX,
  y: crosshairY,
  width: 0,
  height: crosshairWidth,
  fill: "#000"
});


var drag = d3.behavior.drag().on("drag", function() {
  var dx = d3.event.dx;
  var dy = d3.event.dy;
  
  if (dy >= 0) {
    ybar.attr({
      y: crosshairY + crosshairWidth,
      height: dy
    });
  } else {
    ybar.attr({
      y: crosshairY + dy,
      height: -dy
    });    
  }

  if (dx >= 0) {
    xbar.attr({
      x: crosshairX + crosshairWidth,
      width: dx
    });
  } else {
    xbar.attr({
      x: crosshairX + dx,
      width: -dx
    });    
  }

}).on("dragstart", function() {
  bg.transition()
    .duration(lightUpDuration)
    .attr({fill: lightUpColor});
  xbar.transition()
    .duration(lightUpDuration)
    .attr({fill: barColor});
  ybar.transition()
    .duration(lightUpDuration)
    .attr({fill: barColor});
}).on("dragend", function() {
  ybar
    .attr({height: 0})
    .transition()
    .duration(lightDownDuration)
    .attr({fill: "#000"});
  xbar
  .attr({width: 0})
    .transition()
    .duration(lightDownDuration)
    .attr({fill: "#000"});
  bg
    .transition()
    .duration(lightDownDuration)
    .attr({fill: "#000"});
});


bg.call(drag);