From e82fe34a2b8ba38644a541a05cb1fb9f5e122157 Mon Sep 17 00:00:00 2001
From: darcy <yanjiabinchn@outlook.com>
Date: Thu, 19 May 2022 21:58:08 +0800
Subject: [PATCH] docs: add example of using chinese

---
 README_zh.md              |  4 +++-
 examples/basic/chinese.go | 50 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 examples/basic/chinese.go

diff --git a/README_zh.md b/README_zh.md
index 57d9db4..1589923 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -220,4 +220,6 @@ BenchmarkMultiChartSVGRender-8               367           3356325 ns/op
 默认使用的字符为`roboto`为英文字体库，因此如果需要显示中文字符需要增加中文字体库，`InstallFont`函数可添加对应的字体库，成功添加之后则指定`title.textStyle.fontFamily`即可。
 在浏览器中使用`svg`时，如果指定的`fontFamily`不支持中文字符，展示的中文并不会乱码，但是会导致在计算字符宽度等错误。
 
-[中文字库noto-cjk](https://github.com/googlefonts/noto-cjk)
\ No newline at end of file
+字体文件可以在[中文字库noto-cjk](https://github.com/googlefonts/noto-cjk)下载，注意下载时选择字体格式为 `ttf` 格式，如果选用 `otf` 格式可能会加载失败。
+
+示例见 [examples/basic/chinese.go](examples/basic/chinese.go)
\ No newline at end of file
diff --git a/examples/basic/chinese.go b/examples/basic/chinese.go
new file mode 100644
index 0000000..4380349
--- /dev/null
+++ b/examples/basic/chinese.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	charts "github.com/vicanso/go-charts"
+)
+
+func echartsRender() ([]byte, error) {
+	return charts.RenderEChartsToPNG(`{
+		"title": {
+			"text": "用户访问次数",
+			"textStyle": {
+				"fontFamily": "chinese"
+			}
+		},
+		"xAxis": {
+			"data": ["周一", "周二", "周三", "周四", "周五", "周六", "周日"]
+		},
+		"series": [
+			{
+				"data": [150, 230, 224, 218, 135, 147, 260],
+				"label": {
+					"show": true
+				}
+			}
+		]
+	}`)
+}
+
+func main() {
+	fontData, err := os.ReadFile("/Users/darcy/Downloads/NotoSansCJKsc-VF.ttf")
+	if err != nil {
+		log.Fatalln("Error when reading font file:", err)
+	}
+
+	if err := charts.InstallFont("chinese", fontData); err != nil {
+		log.Fatalln("Error when instaling font:", err)
+	}
+
+	fileData, err := echartsRender()
+
+	if err != nil {
+		log.Fatalln("Error when rendering image:", err)
+	}
+	if err := os.WriteFile("chinese.png", fileData, 0644); err != nil {
+		log.Fatalln("Error when save image to chinese.png:", err)
+	}
+}