From d77af13521217a2bb134a33a7b0db59a78e35f1c Mon Sep 17 00:00:00 2001
From: Kolan Sh <backbone@backbone.ws>
Date: Fri, 19 Jan 2018 14:25:53 +0300
Subject: [PATCH] OK In progress...

---
 src/Chart.vala | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Chart.vala b/src/Chart.vala
index 744ccfe..ef1ac7c 100644
--- a/src/Chart.vala
+++ b/src/Chart.vala
@@ -278,10 +278,12 @@ namespace CairoChart {
 
 			d.x *= x1 - x0; d.y *= y1 - y0;
 
+			var px1 = plarea.x + plarea.width;
+			var py1 = plarea.y + plarea.height;
 			if (xmin + d.x < plarea.x) d.x = plarea.x - xmin;
-			if (xmax + d.x > plarea.x + plarea.width) d.x = plarea.x + plarea.width - xmax;
+			if (xmax + d.x > px1) d.x = px1 - xmax;
 			if (ymin + d.y < plarea.y) d.y = plarea.y - ymin;
-			if (ymax + d.y > plarea.y + plarea.height) d.y = plarea.y + plarea.height - ymax;
+			if (ymax + d.y > py1) d.y = py1 - ymax;
 
 			zoom_in (Cairo.Rectangle(){x = xmin + d.x, y = ymin + d.y, width = xmax - xmin, height = ymax - ymin});
 		}