From 46224ce156a9a2782a21172c39c40968db7f89e0 Mon Sep 17 00:00:00 2001
From: Gertjan van den Burg <gertjanvandenburg@gmail.com>
Date: Mon, 25 Mar 2019 19:36:38 +0000
Subject: first working version of pan + zoom + click

---
 app/static/annotate.css           |  27 +--
 app/templates/annotate/index.html | 361 +++++++++++++-------------------------
 2 files changed, 125 insertions(+), 263 deletions(-)

diff --git a/app/static/annotate.css b/app/static/annotate.css
index d6e30fc..0ee40f6 100644
--- a/app/static/annotate.css
+++ b/app/static/annotate.css
@@ -3,25 +3,6 @@
 	text-align: center;
 }
 
-/*
-path {
-  stroke-width: 2;
-  fill: none;
-}
-
-.axis path, .axis line {
-  fill: none;
-  stroke: grey;
-  stroke-width: 1;
-  shape-rendering: crispEdges;
-}
-
-#changepoint-table {
-	margin: 0 auto;
-}
-
-*/
-
 .line {
 	fill: none;
 	stroke: blue;
@@ -33,8 +14,8 @@ circle {
 	fill: blue;
 }
 
-.zoom {
-	cursor: move;
-	fill: none;
-	pointer-events: fill;
+rect {
+	fill: white;
+	opacity: 0;
 }
+
diff --git a/app/templates/annotate/index.html b/app/templates/annotate/index.html
index b605dc3..1805d95 100644
--- a/app/templates/annotate/index.html
+++ b/app/templates/annotate/index.html
@@ -24,204 +24,139 @@
 
 
 {# Based on: https://github.com/benalexkeen/d3-flask-blog-post/blob/master/templates/index.html #}
+{# And: https://bl.ocks.org/mbostock/35964711079355050ff1 #}
 <script src="http://d3js.org/d3.v5.min.js"></script>
 <script>
-	var graphData = {{ data.chart_data | safe }};
+var data = {{ data.chart_data | safe }};
+var n = 0;
+data.forEach(function(d) {
+	d.X = n++;
+	d.Y = d.value;
+});
+
+var divWidth = 1000;
+var divHeight = 480;
+
+var svg = d3.select("#graph")
+	.on("touchstart", nozoom)
+	.on("touchmove", nozoom)
+	.append("svg")
+	.attr("width", divWidth)
+	.attr("height", divHeight);
+
+var margin = {top: 20, right: 20, bottom: 100, left: 100};
+var width = +svg.attr("width") - margin.left - margin.right;
+var height = +svg.attr("height") - margin.top - margin.bottom;
 
-/**** Starting the alternative in this block:
-  https://bl.ocks.org/mbostock/34f08d5e11952a80609169b7917d4172
- **/
-var svg = d3.select("#graph").append("svg").attr("width", 960).attr("height", 500),
-	margin = {top: 20, right: 20, bottom: 110, left: 40},
-	margin2 = {top: 430, right: 20, bottom: 30, left: 40},
-	width = +svg.attr("width") - margin.left - margin.right,
-	height = +svg.attr("height") - margin.top - margin.bottom,
-	height2 = +svg.attr("height") - margin2.top - margin2.bottom;
+var zoom = d3.zoom()
+  .scaleExtent([1, 10])
+  .translateExtent([[0, 0], [width, height]])
+  .extent([[0, 0], [width, height]])
+  .on("zoom", zoomed);
 
-var x = d3.scaleLinear().range([0, width]),
-	y = d3.scaleLinear().range([height, 0]),
-	x2 = d3.scaleLinear().range([0, width]);
+var x = d3.scaleLinear().range([0, width]);
+var x2 = d3.scaleLinear().range([0, width]);
+var y = d3.scaleLinear().range([height, 0]);
 
-var xAxis = d3.axisBottom(x),
-	yAxis = d3.axisLeft(y);
+var xAxis = d3.axisBottom(x);
+var yAxis = d3.axisLeft(y);
 
-var zoom = d3.zoom()
-	.scaleExtent([1, 10])
-	.translateExtent([[0, 0], [width, height]])
-	.extent([[0, 0], [width, height]])
-	.on("zoom", zoomed);
+var xExtent = d3.extent(data, function(d) { return d.X; });
+var xRange = xExtent[1] - xExtent[0];
+var xDomainMin = xExtent[0] - xRange * 0.02;
+var xDomainMax = xExtent[1] + xRange * 0.02;
 
-var line = d3.line()
-	.x(function(d) { return x(d.X); })
-	.y(function(d) { return y(d.Y); });
+var yExtent = d3.extent(data, function(d) { return d.Y; });
+var yRange = yExtent[1] - yExtent[0];
+var yDomainMin = yExtent[0] - yRange * 0.05;
+var yDomainMax = yExtent[1] + yRange * 0.05;
+
+x.domain([xDomainMin, xDomainMax]);
+y.domain([yDomainMin, yDomainMax]);
+x2.domain(x.domain());
 
-// used for clipping the path outside the graph
 svg.append("defs").append("clipPath")
-	.attr("id", "clip")
-	.append("rect")
-	.attr("width", width)
-	.attr("height", height);
+  .attr("id", "clip")
+  .append("rect")
+  .attr("width", width - 30)
+  .attr("height", height)
+  .attr("transform", "translate(" + 30 + ",0)");
+
+svg.append("g")
+  .attr("class", "axis axis--y")
+  .attr("transform", "translate(" + 30 + ",0)")
+  .call(yAxis);
+
+svg.append("g")
+  .attr("class", "axis axis--x")
+  .attr("transform", "translate(0," + height + ")")
+  .call(xAxis);
+
+svg.append("text")
+  .attr("text-anchor", "middle")
+  .attr("class", "axis-label")
+  .attr("transform", "translate(" + (width - 20) + "," + (height + 50) + ")")
+  .text("Time");
 
-var focus = svg.append("g")
-	.attr("class", "focus")
-	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
+var line = d3.line()
+  .x(function(d) { return x(d.X); })
+  .y(function(d) { return y(d.Y); });
+
+var g = svg.append("g")
+    .call(zoom);
+
+g.append("rect")
+    .attr("width", width)
+    .attr("height", height);
+
+var view = g.append("g")
+    .attr("class", "view");
+
+view.append("path")
+  .datum(data)
+  .attr("class", "line")
+  .attr("d", line);
+
+var points = view.selectAll("circle")
+    .data(data)
+  .enter().append("circle")
+    .attr("cx", function(d) { return x(d.X); })
+    .attr("cy", function(d) { return y(d.Y); })
+    .attr("data_X", function(d) { return d.X; })
+    .attr("data_Y", function(d) { return d.Y; })
+    .attr("r", 5)
+    .on("click", clicked);
 
 function zoomed() {
-	/*
-	if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush")
-		return; // ignore zoom-by-brush
-		*/
-	var t = d3.event.transform;
-	x.domain(t.rescaleX(x2).domain());
-	// redraw
-	focus.select(".line").attr("d", line);
-	points.data(graphData)
-		.attr("cx", function(d) { return x(d.X) })
-		.attr("cy", function(d) { return y(d.Y) });
-	// update axis
-	focus.select(".axis--x").call(xAxis);
+  t = d3.event.transform;
+  x.domain(t.rescaleX(x2).domain());
+  svg.select(".line").attr("d", line);
+  points.data(data)
+    .attr("cx", function(d) { return x(d.X); })
+    .attr("cy", function(d) { return y(d.Y); });
+  svg.select(".axis--x").call(xAxis);
 }
 
-function draw(data) {
-	var n = 0;
-	data.forEach(function(d) {
-		d.X = n++;
-		d.Y = d.value;
-	});
-
-	var yExtent = d3.extent(data, function(d) { return d.Y; }),
-		yRange = yExtent[1] - yExtent[0];
-
-	x.domain(d3.extent(data, function(d) { return d.X; }));
-	y.domain([yExtent[0] - (yRange * 0.05), yExtent[1] + (yRange * 
-		0.05)]);
-	x2.domain(x.domain());
-
-	focus.append("path")
-		.datum(data)
-		.attr("class", "line")
-		.attr("d", line);
-
-	focus.append("g")
-		.attr("class", "axis axis--x")
-		.attr("transform", "translate(0," + height + ")")
-		.call(xAxis);
-
-	focus.append("g")
-		.attr("class", "axis axis--y")
-		.call(yAxis);
-
-	var points = focus.append("g")
-		.selectAll("dot")
-		.data(data)
-		.enter()
-		.append("circle")
-		.attr("cx", function(d) { return x(d.X); } )
-		.attr("cy", function(d) { return y(d.Y); } )
-		.attr("data_X", function(d) { return d.X; } )
-		.attr("data_Y", function(d) { return d.Y; } )
-		.attr("r", 4)
-		.attr("fill", "blue")
-		.on("click", function(d, i) {
-			// this function handles changepoint marking
-			var elem = d3.select(d);
-			if (elem.classed("changepoint")) {
-				elem.style("fill", "blue");
-				elem.classed("changepoint", false);
-			} else {
-				elem.style("fill", "red");
-				elem.classed("changepoint", true);
-			}
-			// updateTable();
-		});
-
-	var layer = svg.append("rect")
-		.attr("class", "zoom")
-		.attr("width", width)
-		.attr("height", height)
-		.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
-		.call(zoom);
-
-	return(points);
-};
-
-var points = draw(graphData);
-
-
-
-
-
-
-
-/***** END ALTERNATIVE **/
-
-
-/*
-	// Set the dimension of the svg
-  var margin = {top: 30, right: 50, bottom: 30, left: 50};
-  var svgWidth = 800;
-  var svgHeight = 400;
-  var graphWidth = svgWidth - margin.left - margin.right;
-  var graphHeight = svgHeight - margin.top - margin.bottom;
-
-  var xAxisScale = d3.scaleLinear().range([0, graphWidth]);
-  var yAxisScale = d3.scaleLinear().range([graphHeight, 0]);
-
-  var xAxis = d3.axisBottom(xAxisScale).ticks(5);
-  var yAxis = d3.axisLeft(yAxisScale).ticks(5);
-
-  var line = d3.line()
-    .x(function(d) { return xAxisScale(d.X); })
-    .y(function(d) { return yAxisScale(d.Y); });
-
-  var svg = d3.select("#graph")
-    .append("svg")
-      .attr("width", svgWidth)
-      .attr("height", svgHeight)
-
-  var zoom = d3.zoom()
-    .scaleExtent([1, 5])
-    .on("zoom", zoomFunction);
-
-  var innerSpace = svg
-    .append("g")
-    .attr("class", "inner_space")
-    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
-
-// Add the X Axis
-  var gX = innerSpace.append("g")
-    .attr("class", "axis axis--x")
-    .attr("transform", "translate(0," + graphHeight + ")")
-    .call(xAxis);
-
-// Add the Y Axis
-  var gY = innerSpace.append("g")
-    .attr("class", "axis axis--y")
-    .call(yAxis);
-
-  var view = innerSpace.append("rect")
-    .attr("class", "zoom")
-    .attr("width", graphWidth)
-    .attr("height", graphHeight)
-    .call(zoom)
-
-  function zoomFunction() {
-
-	  var e = d3.event,
-		  tx = Math.min(0, Math.max(e.transform.x, graphWidth - 
-			  graphWidth * e.scale)),
-		  ty = Math.min(0, Math.max(e.transform.y, graphHeight - 
-			  graphHeight * e.scale));
-	  zoom.translateBy([tx, ty]);
-
-	  theline.attr("transform", [
-		  "translate(" + [tx, ty] + ")",
-		  "scale(" + e.scale + ")"
-		  ].join(" "));
+function clicked(d, i) {
+	if (d3.event.defaultPrevented) return; // zoomed
+
+	// this function handles changepoint marking
+	var elem = d3.select(this);
+	if (elem.classed("changepoint")) {
+		elem.style("fill", "blue");
+		elem.classed("changepoint", false);
+	} else {
+		elem.style("fill", "red");
+		elem.classed("changepoint", true);
+	}
+	updateTable();
+}
 
-  }
+function nozoom() {
+  d3.event.preventDefault();
+}
 
-  function updateTable() {
+function updateTable() {
 	var changepoints = document.getElementsByClassName("changepoint");
 
 	var myTableDiv = document.getElementById("changepoint-table");
@@ -238,7 +173,7 @@ var points = draw(graphData);
 	heading[1] = "X";
 	heading[2] = "Y";
 
-	  // TABLE COLUMNS
+	// TABLE COLUMNS
 	var thead = document.createElement('THEAD');
 	thead.className = "thead-dark";
 	table.appendChild(thead);
@@ -250,7 +185,7 @@ var points = draw(graphData);
 	}
 	var body = document.createElement("TBODY");
 
-//TABLE ROWS
+	//TABLE ROWS
 	for (i = 0; i < changepoints.length; i++) {
 		cp = changepoints[i];
 
@@ -277,61 +212,7 @@ var points = draw(graphData);
 	}
 	table.appendChild(body);
 	myTableDiv.appendChild(table);
-  }
-
-  function draw(data) {
-    var n = 0;
-    data.forEach(function(d) {
-      d.X = n++;
-      d.Y = d.value;
-    });
-
-    xAxisScale.domain(d3.extent(data, function(d) { return d.X; }));
-    yAxisScale.domain([
-      d3.min(data, function(d) {
-	return Math.min(d.Y)
-      }),
-      d3.max(data, function(d) {
-	return Math.max(d.Y)
-      })]);
-
-	  // the line
-    var theline = innerSpace.append("path")
-      .style("stroke", "blue")
-      .style("fill", "none")
-      .attr("class", "line")
-      .attr("d", line(data));
-
-// the points
-    var thepoints = innerSpace.append("g")
-	.selectAll("dot")
-	.data(data)
-	.enter()
-	.append("circle")
-	.attr("cx", function(d) { return xAxisScale(d.X) } )
-	.attr("cy", function(d) { return yAxisScale(d.Y) } )
-	.attr("data_X", function(d) { return d.X } )
-	.attr("data_Y", function(d) { return d.Y } )
-	.attr("r", 4)
-	.attr("fill", "blue")
-	.on("click", function(d, i) {
-		// this function handles changepoint marking
-		var elem = d3.select(this);
-		if (elem.classed("changepoint")) {
-			elem.style("fill", "blue");
-			elem.classed("changepoint", false);
-		} else {
-			elem.style("fill", "red");
-			elem.classed("changepoint", true);
-		}
-		updateTable();
-	});
-    return [theline, thepoints];
-  };
-
-  var out = draw(graphData);
-  var theline = out[0]
-  var thepoints = out[1];
-  */
+}
+
 </script>
 {% endblock %}
-- 
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