Done axis and hover details

d3-tip.js

@@ -0,0 +1,320 @@
+// d3.tip
+// Copyright (c) 2013 Justin Palmer
+// ES6 / D3 v4 Adaption Copyright (c) 2016 Constantin Gavrilete
+// Removal of ES6 for D3 v4 Adaption Copyright (c) 2016 David Gotz
+//
+// Tooltips for d3.js SVG visualizations
+
+d3.functor = function functor(v) {
+  return typeof v === "function" ? v : function() {
+    return v;
+  };
+};
+
+d3.tip = function() {
+
+  var direction = d3_tip_direction,
+      offset    = d3_tip_offset,
+      html      = d3_tip_html,
+      node      = initNode(),
+      svg       = null,
+      point     = null,
+      target    = null
+
+  function tip(vis) {
+    svg = getSVGNode(vis)
+    point = svg.createSVGPoint()
+    document.body.appendChild(node)
+  }
+
+  // Public - show the tooltip on the screen
+  //
+  // Returns a tip
+  tip.show = function() {
+    var args = Array.prototype.slice.call(arguments)
+    if(args[args.length - 1] instanceof SVGElement) target = args.pop()
+
+    var content = html.apply(this, args),
+        poffset = offset.apply(this, args),
+        dir     = direction.apply(this, args),
+        nodel   = getNodeEl(),
+        i       = directions.length,
+        coords,
+        scrollTop  = document.documentElement.scrollTop || document.body.scrollTop,
+        scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft
+
+    nodel.html(content)
+      .style('position', 'absolute')
+      .style('opacity', 1)
+      .style('pointer-events', 'all')
+
+    while(i--) nodel.classed(directions[i], false)
+    coords = direction_callbacks[dir].apply(this)
+    nodel.classed(dir, true)
+      .style('top', (coords.top +  poffset[0]) + scrollTop + 'px')
+      .style('left', (coords.left + poffset[1]) + scrollLeft + 'px')
+
+    return tip
+  }
+
+  // Public - hide the tooltip
+  //
+  // Returns a tip
+  tip.hide = function() {
+    var nodel = getNodeEl()
+    nodel
+      .style('opacity', 0)
+      .style('pointer-events', 'none')
+    return tip
+  }
+
+  // Public: Proxy attr calls to the d3 tip container.  Sets or gets attribute value.
+  //
+  // n - name of the attribute
+  // v - value of the attribute
+  //
+  // Returns tip or attribute value
+  tip.attr = function(n, v) {
+    if (arguments.length < 2 && typeof n === 'string') {
+      return getNodeEl().attr(n)
+    } else {
+      var args =  Array.prototype.slice.call(arguments)
+      d3.selection.prototype.attr.apply(getNodeEl(), args)
+    }
+
+    return tip
+  }
+
+  // Public: Proxy style calls to the d3 tip container.  Sets or gets a style value.
+  //
+  // n - name of the property
+  // v - value of the property
+  //
+  // Returns tip or style property value
+  tip.style = function(n, v) {
+    // debugger;
+    if (arguments.length < 2 && typeof n === 'string') {
+      return getNodeEl().style(n)
+    } else {
+      var args = Array.prototype.slice.call(arguments);
+      if (args.length === 1) {
+        var styles = args[0];
+        Object.keys(styles).forEach(function(key) {
+          return d3.selection.prototype.style.apply(getNodeEl(), [key, styles[key]]);
+        });
+      }
+    }
+
+    return tip
+  }
+
+  // Public: Set or get the direction of the tooltip
+  //
+  // v - One of n(north), s(south), e(east), or w(west), nw(northwest),
+  //     sw(southwest), ne(northeast) or se(southeast)
+  //
+  // Returns tip or direction
+  tip.direction = function(v) {
+    if (!arguments.length) return direction
+    direction = v == null ? v : d3.functor(v)
+
+    return tip
+  }
+
+  // Public: Sets or gets the offset of the tip
+  //
+  // v - Array of [x, y] offset
+  //
+  // Returns offset or
+  tip.offset = function(v) {
+    if (!arguments.length) return offset
+    offset = v == null ? v : d3.functor(v)
+
+    return tip
+  }
+
+  // Public: sets or gets the html value of the tooltip
+  //
+  // v - String value of the tip
+  //
+  // Returns html value or tip
+  tip.html = function(v) {
+    if (!arguments.length) return html
+    html = v == null ? v : d3.functor(v)
+
+    return tip
+  }
+
+  // Public: destroys the tooltip and removes it from the DOM
+  //
+  // Returns a tip
+  tip.destroy = function() {
+    if(node) {
+      getNodeEl().remove();
+      node = null;
+    }
+    return tip;
+  }
+
+  function d3_tip_direction() { return 'n' }
+  function d3_tip_offset() { return [0, 0] }
+  function d3_tip_html() { return ' ' }
+
+  var direction_callbacks = {
+    n:  direction_n,
+    s:  direction_s,
+    e:  direction_e,
+    w:  direction_w,
+    nw: direction_nw,
+    ne: direction_ne,
+    sw: direction_sw,
+    se: direction_se
+  };
+
+  var directions = Object.keys(direction_callbacks);
+
+  function direction_n() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.n.y - node.offsetHeight,
+      left: bbox.n.x - node.offsetWidth / 2
+    }
+  }
+
+  function direction_s() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.s.y,
+      left: bbox.s.x - node.offsetWidth / 2
+    }
+  }
+
+  function direction_e() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.e.y - node.offsetHeight / 2,
+      left: bbox.e.x
+    }
+  }
+
+  function direction_w() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.w.y - node.offsetHeight / 2,
+      left: bbox.w.x - node.offsetWidth
+    }
+  }
+
+  function direction_nw() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.nw.y - node.offsetHeight,
+      left: bbox.nw.x - node.offsetWidth
+    }
+  }
+
+  function direction_ne() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.ne.y - node.offsetHeight,
+      left: bbox.ne.x
+    }
+  }
+
+  function direction_sw() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.sw.y,
+      left: bbox.sw.x - node.offsetWidth
+    }
+  }
+
+  function direction_se() {
+    var bbox = getScreenBBox()
+    return {
+      top:  bbox.se.y,
+      left: bbox.e.x
+    }
+  }
+
+  function initNode() {
+    var node = d3.select(document.createElement('div'))
+    node
+      .style('position', 'absolute')
+      .style('top', 0)
+      .style('opacity', 0)
+      .style('pointer-events', 'none')
+      .style('box-sizing', 'border-box')
+
+    return node.node()
+  }
+
+  function getSVGNode(el) {
+    el = el.node()
+    if(el.tagName.toLowerCase() === 'svg')
+      return el
+
+    return el.ownerSVGElement
+  }
+
+  function getNodeEl() {
+    if(node === null) {
+      node = initNode();
+      // re-add node to DOM
+      document.body.appendChild(node);
+    };
+    return d3.select(node);
+  }
+
+  // Private - gets the screen coordinates of a shape
+  //
+  // Given a shape on the screen, will return an SVGPoint for the directions
+  // n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
+  // sw(southwest).
+  //
+  //    +-+-+
+  //    |   |
+  //    +   +
+  //    |   |
+  //    +-+-+
+  //
+  // Returns an Object {n, s, e, w, nw, sw, ne, se}
+  function getScreenBBox() {
+    var targetel   = target || d3.event.target;
+
+    while ('undefined' === typeof targetel.getScreenCTM && 'undefined' === targetel.parentNode) {
+        targetel = targetel.parentNode;
+    }
+
+    var bbox       = {},
+        matrix     = targetel.getScreenCTM(),
+        tbbox      = targetel.getBBox(),
+        width      = tbbox.width,
+        height     = tbbox.height,
+        x          = tbbox.x,
+        y          = tbbox.y
+
+    point.x = x
+    point.y = y
+    bbox.nw = point.matrixTransform(matrix)
+    point.x += width
+    bbox.ne = point.matrixTransform(matrix)
+    point.y += height
+    bbox.se = point.matrixTransform(matrix)
+    point.x -= width
+    bbox.sw = point.matrixTransform(matrix)
+    point.y -= height / 2
+    bbox.w  = point.matrixTransform(matrix)
+    point.x += width
+    bbox.e = point.matrixTransform(matrix)
+    point.x -= width / 2
+    point.y -= height / 2
+    bbox.n = point.matrixTransform(matrix)
+    point.y += height
+    bbox.s = point.matrixTransform(matrix)
+
+    return bbox
+  }
+
+  return tip
+};

index.css

@@ -28,7 +28,11 @@ body
     background-color: rgba(0,0,0,0.1);
 }
 
-line-chart
+.d3-tip
 {
+    background-color: rgba(255,255,255,0.85);
+    font-size: 1.2em;
+    padding: 0 .35em;
 
+    border-radius: .5em;
 }

index.html

@@ -6,6 +6,7 @@
     <link rel="stylesheet" href="index.css">
     <script type="text/javascript" src="d3.v4.min.js"></script>
     <script type="text/javascript" src="d3-selection-multi.v0.4.min.js"></script>
+    <script type="text/javascript" src="d3-tip.js"></script>
     <script type="text/javascript" src="jquery.min.js"></script>
 </head>
 <body>

index.js

@@ -1,6 +1,10 @@
 
 var all_data_points = []; // all_data_points = [ [[x1,y1],[x2,y2],[another point]], [another chart] ]
 
+var axisTickPadding = 25;
+var axisLabelPadding = 25;
+var axisPadding = axisTickPadding + axisLabelPadding;
+
 // gather all data
 d3.selectAll("line-chart").each( function () {
     var ele = d3.select(this)
@@ -34,40 +38,40 @@ list_line_chart.each( function (data_chart, index_chart) {
         }
     }
 
+    var drawing_width = parent_width - axisPadding;
+    var drawing_height =  parent_height - axisPadding;
+
     // prepare scales
     var xscale = d3.scaleLinear().
     // set domain with an immediately invoked function
     domain(function (arr_point) {
         var max_val = d3.max(arr_point,function (point) {
             return point[0];
-        })
+        }) * 1.1;
         var min_val = 0;
         return [min_val,max_val];
     }(data_chart)).
-    // set region to svg width and height
+    range([0,drawing_width])
-    range([0,parent_width])
 
     var yscale = d3.scaleLinear().
-    // set domain with an immediately invoked function
     domain(function (arr_point) {
         var max_val = d3.max(arr_point,function (point) {
             return point[1];
-        })
+        }) * 1.1;
         var min_val = 0;
         return [min_val,max_val];
     }(data_chart)).
-    // set region to svg width and height
+    range([drawing_height,0])
-    range([parent_height,0])
 
-	var ele_svg = ele_chart.append("svg");
+	var ele_svg = ele_chart.append("svg").attr("width",parent_width).attr("height",parent_height);
 
-    ele_svg.attr("width",parent_width).attr("height",parent_height).
+	var ele_drawingArea = ele_svg.append("g").
-    selectAll("circle").data(function(d) {return d;}).enter().append("circle").
+		attr("width",drawing_width).attr("height",drawing_height).
-        attr("r",5).
+		attr("transform","translate("+axisPadding+",0)")
-        attr("cx",function (d) {return xscale(d[0]);}).
-        attr("cy",function (d) {return yscale(d[1]);})
 
-    ele_svg.selectAll("line").data(function(d){
+	// draw the lines
+    var arr_ele_lines = ele_drawingArea.
+    selectAll("line").data(function(d){
         return d.map(function (val,index,arr) {
             if (index < arr.length - 1)
             {
@@ -94,4 +98,106 @@ list_line_chart.each( function (data_chart, index_chart) {
         "stroke-width":"2"
     })
 
+    // draw the points
+	var arr_ele_points = ele_drawingArea.
+    selectAll("circle").data(function(d) {return d;}).enter().append("circle").
+        attr("r",5).
+        attr("cx",function (d) {return xscale(d[0]);}).
+        attr("cy",function (d) {return yscale(d[1]);})
+
+    // create axis objects
+    var xaxis = d3.axisBottom()
+		.scale(xscale)
+		.ticks(10);
+	var yaxis = d3.axisLeft()
+		.scale(yscale)
+		.ticks(10);
+
+	// add axis to svg
+	ele_svg.
+	append("g").classed("xaxis",true).
+	call(xaxis).
+	attr("transform","translate("+axisPadding+","+drawing_height+")")
+
+	ele_svg.
+	append("g").classed("yaxis",true).
+	call(yaxis).
+	attr("transform","translate("+axisPadding+","+"0)")
+
+	// create, add and show tip on mouseover
+	var tip_points = d3.tip()
+	  .attr('class', 'd3-tip')
+	  .html(function(d) { return "("+d[0]+","+d[1]+")"; })
+
+	var vis = ele_drawingArea
+	  // REQUIRED:  Call the tooltip on the context of the visualization
+	  .call(tip_points)
+
+	 arr_ele_points.
+	 on('mouseover', function () {
+	 	tip_points.show.apply(this,arguments);
+
+	 	var ele_point = d3.select(this);
+	 	ele_point.
+	 	transition().
+	 	duration(.5).
+	 	attrs({
+	 		"fill":"rgb(128,128,128)",
+	 		"r":7
+	 	})
+	 }).
+	 on('mouseout', function () {
+	 	tip_points.hide.apply(this,arguments);
+
+	 	var ele_point = d3.select(this);
+	 	ele_point.
+	 	transition().
+	 	duration(.5).
+	 	attrs({
+	 		"fill":"black",
+	 		"r":5
+	 	})
+	 })
+
+	 arr_ele_lines.
+	 on('mouseover', function () {
+	 	var ele_line = d3.select(this);
+	 	ele_line.
+	 	transition().
+	 	duration(.5).
+	 	attrs({
+	 		"stroke":"rgb(128,128,128)",
+	 		"stroke-width":4
+	 	})
+	 }).
+	 on('mouseout', function () {
+	 	var ele_line = d3.select(this);
+	 	ele_line.
+	 	transition().
+	 	duration(.5).
+	 	attrs({
+	 		"stroke":"black",
+	 		"stroke-width":2
+	 	})
+	 })
+
+	// axis legend
+	ele_svg
+    .append('g').classed("x-label",true)
+    .attr('transform', 'translate(' + (axisPadding+(parent_width - axisPadding)/2) + ', ' + (parent_height - axisLabelPadding/2) + ')')
+    .append('text')
+    .attr('text-anchor', 'middle')
+    // .attr('transform', 'rotate(-90)')
+    .text('X Axis Label')
+    ;
+    ele_svg
+    .append('g').classed("y-label",true)
+    .attr('transform', 'translate(' + (axisLabelPadding) + ', ' + (parent_height - axisPadding)/2 + ')')
+    .append('text')
+    .attr('text-anchor', 'middle')
+    .attr('transform', 'rotate(-90)')
+    .attr("shape-rendering","crispEdges")
+    .text('Y Axis Label')
+    ;
+
 })