Fix - correctly identify horizontal TGaxis with reverse scale

Author: linev

changes.md

@@ -3,6 +3,7 @@
 ## Changes in 5.2.x
 1. Fix - support pow(x,n) function in formula
 2. Fix - use pad.fFillColor for frame when fFrameFillColor==0
+3. Fix - correctly identify horizontal TGaxis with reverse scale 
 
 
 ## Changes in 5.2.3

scripts/JSRootPainter.js

@@ -6146,7 +6146,8 @@
           x2 = this.AxisToSvg("x", gaxis.fX2),
           y2 = this.AxisToSvg("y", gaxis.fY2),
           w = x2 - x1, h = y1 - y2,
-          vertical = w < 5, kind = "normal", func = null,
+          vertical = Math.abs(w) < Math.abs(h),
+          kind = "normal", func = null,
           min = gaxis.fWmin, max = gaxis.fWmax, reverse = false;
 
       if (gaxis.fChopt.indexOf("G")>=0) {