From 166f71b27cd42a70e75ce5c3e274d5b2d4051b37 Mon Sep 17 00:00:00 2001
From: Ehab Wahba <ehab.wahba@persival.de>
Date: Fri, 3 Nov 2023 17:29:21 +0100
Subject: [PATCH] Added +/- icon for expand/collapse button

---
 dag.js    | 27 +++++++++++++++++++++++++++
 style.css |  2 +-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/dag.js b/dag.js
index b2c7ad7..32c8ed7 100644
--- a/dag.js
+++ b/dag.js
@@ -367,6 +367,32 @@ function drawTree(drawData,state)
         .on("mouseout", function () { d3.select(this).attr("r", 12); })
         .on("click", onNodeToggleChildrenClicked);
 
+    nodesHaveChildren.append("text")
+        .attr("class", "iText")
+        .attr("x",function (d) {
+            switch (shownNodeChildrenMap[d.data.id]) {
+                case 1:
+                    return nodeWidth/2 - 4.25;
+                default:
+                    return nodeWidth/2 - 7;
+            }
+        })
+        .attr("y",function (d) {
+            switch (shownNodeChildrenMap[d.data.id]) {
+                case 1:
+                    return nodeHeight + 6;
+                default:
+                    return nodeHeight + 8.5;
+            }
+        })
+        .html(function (d) {
+            switch (shownNodeChildrenMap[d.data.id]) {
+                case 1:
+                    return "-";
+                default:
+                    return "+";
+            }
+        })
 }
 /**
  * Search for nodes children and add them to the currentTree
@@ -402,6 +428,7 @@ function NodeExpand(currentNodeId,data)
             nodeChildren.push(data[i]["id"]);
         }
     }
+    ///Link new nodes (clicked node children) to their existing children
     for(let i = 0;i<nodeChildren.length;i++)
     {
         let nodeGrandChildren = getNodeChildren(nodeChildren[i],data);
diff --git a/style.css b/style.css
index d913a5f..b8b24b5 100644
--- a/style.css
+++ b/style.css
@@ -244,7 +244,7 @@ body {
 /*}*/
 
 .node .iText {
-  font-size: 18px;
+  font-size: 25px;
   fill: var(--main-bg);
   pointer-events: none;
   font-family: Georgia, 'Times New Roman', Times, serif;