From 42b1c8148883844cf80b70a3096e6ee67be01f61 Mon Sep 17 00:00:00 2001
From: "Huy Bui (Kevin)" <2992996+huybuidev@users.noreply.github.com>
Date: Sat, 11 Jul 2020 01:07:41 +0800
Subject: Resolve #661 Add Logarithmic scale option support on Y axis (#662)

* Resolve #661 Add Logarithmic scale option support on Y axis

Example usage:
Add the following option into the format string when using AddChart:

"y_axis":{"scaling":{"logbase":"10"}}

* Change type of LogBase from attrValString to attrVarFloat

* Add test case for testing Logarithmic Option in Y axis of charts

* Move field `LogBase` in the format string up one level (remove `Scaling`) as suggested the owner

Test cases are updated accordingly.
---
 xmlChart.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'xmlChart.go')

diff --git a/xmlChart.go b/xmlChart.go
index 6f800d7..fae5426 100644
--- a/xmlChart.go
+++ b/xmlChart.go
@@ -380,6 +380,7 @@ type cChartLines struct {
 // cScaling directly maps the scaling element. This element contains
 // additional axis settings.
 type cScaling struct {
+	LogBase     *attrValFloat  `xml:"logBase"`
 	Orientation *attrValString `xml:"orientation"`
 	Max         *attrValFloat  `xml:"max"`
 	Min         *attrValFloat  `xml:"min"`
@@ -544,6 +545,7 @@ type formatChartAxis struct {
 		Italic    bool   `json:"italic"`
 		Underline bool   `json:"underline"`
 	} `json:"num_font"`
+	LogBase    float64      `json:"logbase"`
 	NameLayout formatLayout `json:"name_layout"`
 }
 
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