Add zoom threshold (chartjs#317)

glemiron · May 5, 2020 · 6a7c970 · 6a7c970
1 parent f3e13d6
commit 6a7c970
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -103,6 +103,9 @@ plugins: {
 			// (percentage of zoom on a wheel event)
 			speed: 0.1,
 
+			// Minimal zoom distance required before actually applying zoom
+			threshold: 2,
+
 			// On category scale, minimal zoom level before actually applying zoom
 			sensitivity: 3,
 

diff --git a/src/plugin.js b/src/plugin.js
@@ -482,7 +482,8 @@ var zoomPlugin = {
 			chartInstance.$zoom._dragZoomStart = null;
 			chartInstance.$zoom._dragZoomEnd = null;
 
-			if (dragDistanceX <= 0 && dragDistanceY <= 0) {
+			var zoomThreshold = options.zoom && options.zoom.threshold || 0;
+			if (dragDistanceX <= zoomThreshold && dragDistanceY <= zoomThreshold) {
 				return;
 			}