From 34b0353797a0d24c309139034918ad2060f504f5 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Tue, 07 Jun 2022 15:43:52 +0000
Subject: [PATCH] Merge pull request #140 from DhammaCharts/hugo

---
 assets/js/graph.js |   40 +++++++++++++++++++++++++++++++---------
 1 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/assets/js/graph.js b/assets/js/graph.js
index c7634cf..174d494 100644
--- a/assets/js/graph.js
+++ b/assets/js/graph.js
@@ -1,4 +1,15 @@
-async function drawGraph(baseUrl, pathColors, depth, enableDrag, enableLegend, enableZoom) {
+async function drawGraph(baseUrl, isHome, pathColors, graphConfig) {
+
+  let {
+  depth,
+  enableDrag,
+  enableLegend,
+  enableZoom,
+  opacityScale,
+  scale,
+  repelForce,
+  fontSize} = graphConfig;
+
   const container = document.getElementById("graph-container")
   const { index, links, content } = await fetchData
 
@@ -82,12 +93,12 @@
       .on("end", enableDrag ? dragended : noop)
   }
 
-  const height = Math.max(container.offsetHeight, 250)
+  const height = Math.max(container.offsetHeight, isHome ? 500 : 250)
   const width = container.offsetWidth
 
   const simulation = d3
     .forceSimulation(data.nodes)
-    .force("charge", d3.forceManyBody().strength(-30))
+    .force("charge", d3.forceManyBody().strength(-100 * repelForce))
     .force(
       "link",
       d3
@@ -102,7 +113,7 @@
     .append("svg")
     .attr("width", width)
     .attr("height", height)
-    .attr("viewBox", [-width / 2, -height / 2, width, height])
+    .attr('viewBox', [-width / 2 * 1 / scale, -height / 2 * 1 / scale, width * 1 / scale, height * 1 / scale])
 
   if (enableLegend) {
     const legend = [{ Current: "var(--g-node-active)" }, { Note: "var(--g-node)" }, ...pathColors]
@@ -179,13 +190,18 @@
       // highlight links
       linkNodes.transition().duration(200).attr("stroke", "var(--g-link-active)")
 
+      const bigFont = fontSize*1.5
+
       // show text for self
       d3.select(this.parentNode)
         .raise()
         .select("text")
         .transition()
         .duration(200)
-        .style("opacity", 1)
+        .attr('opacityOld', d3.select(this.parentNode).select('text').style("opacity"))
+        .style('opacity', 1)
+        .style('font-size', bigFont+'em')
+        .attr('dy', d => nodeRadius(d) + 20 + 'px') // radius is in px
     })
     .on("mouseleave", function (_, d) {
       d3.selectAll(".node").transition().duration(200).attr("fill", color)
@@ -197,7 +213,13 @@
 
       linkNodes.transition().duration(200).attr("stroke", "var(--g-link)")
 
-      d3.select(this.parentNode).select("text").transition().duration(200).style("opacity", 0)
+      d3.select(this.parentNode)
+      .select("text")
+      .transition()
+      .duration(200)
+      .style('opacity', d3.select(this.parentNode).select('text').attr("opacityOld"))
+      .style('font-size', fontSize+'em')
+      .attr('dy', d => nodeRadius(d) + 8 + 'px') // radius is in px
     })
     .call(drag(simulation))
 
@@ -208,9 +230,9 @@
     .attr("dy", (d) => nodeRadius(d) + 8 + "px")
     .attr("text-anchor", "middle")
     .text((d) => content[d.id]?.title || d.id.replace("-", " "))
-    .style("opacity", 0)
+    .style('opacity', (opacityScale - 1) / 3.75)
     .style("pointer-events", "none")
-    .style("font-size", "0.4em")
+    .style('font-size', fontSize+'em')
     .raise()
     .call(drag(simulation))
 
@@ -228,7 +250,7 @@
         .on("zoom", ({ transform }) => {
           link.attr("transform", transform)
           node.attr("transform", transform)
-          const scale = transform.k
+          const scale = transform.k * opacityScale;
           const scaledOpacity = Math.max((scale - 1) / 3.75, 0)
           labels.attr("transform", transform).style("opacity", scaledOpacity)
         }),

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