From 485dc7e8c13f6a7760e5bf73604128e0226f8988 Mon Sep 17 00:00:00 2001
From: crusader <crusader@atgame.net>
Date: Tue, 18 Sep 2018 02:12:35 +0900
Subject: [PATCH] zoom fixed 0.5x ~ 4x

---
 src/app/pages/home/home-page.component.ts | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/app/pages/home/home-page.component.ts b/src/app/pages/home/home-page.component.ts
index 6bf118c..5ad1111 100644
--- a/src/app/pages/home/home-page.component.ts
+++ b/src/app/pages/home/home-page.component.ts
@@ -199,10 +199,12 @@ export class HomePageComponent implements OnInit, OnDestroy {
 
     const svg = d3.select(this.discoveryTargetRef.nativeElement);
 
-    this.zoomBehavior = d3.zoom().on('zoom', () => {
-      const transform = d3.event.transform;
-      svg.select('g').attr('transform', 'translate(' + transform.x + ',' + transform.y + ') scale(' + transform.k + ')');
-    });
+    this.zoomBehavior = d3.zoom()
+      .scaleExtent([0.5, 4])
+      .on('zoom', () => {
+        const transform = d3.event.transform;
+        svg.select('g').attr('transform', 'translate(' + transform.x + ',' + transform.y + ') scale(' + transform.k + ')');
+      });
     svg.call(this.zoomBehavior);
 
     const __this = this;