feat: support mulit y axis

mark_point.go

@@ -0,0 +1,75 @@
+// MIT License
+
+// Copyright (c) 2022 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import (
+	"github.com/golang/freetype/truetype"
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+type markPointRenderOption struct {
+	FillColor drawing.Color
+	Font      *truetype.Font
+	Series    *Series
+	Points    []Point
+}
+
+func markPointRender(d *Draw, opt markPointRenderOption) {
+	s := opt.Series
+	if len(s.MarkPoint.Data) == 0 {
+		return
+	}
+	points := opt.Points
+	summary := s.Summary()
+	symbolSize := s.MarkPoint.SymbolSize
+	if symbolSize == 0 {
+		symbolSize = 30
+	}
+	r := d.Render
+	// 设置填充样式
+	chart.Style{
+		FillColor: opt.FillColor,
+	}.WriteToRenderer(r)
+	// 设置文本样式
+	chart.Style{
+		FontColor:   NewTheme(ThemeDark).GetTextColor(),
+		FontSize:    10,
+		StrokeWidth: 1,
+		Font:        opt.Font,
+	}.WriteTextOptionsToRenderer(r)
+	for _, markPointData := range s.MarkPoint.Data {
+		p := points[summary.MinIndex]
+		value := summary.MinValue
+		switch markPointData.Type {
+		case SeriesMarkPointDataTypeMax:
+			p = points[summary.MaxIndex]
+			value = summary.MaxValue
+		}
+
+		d.pin(p.X, p.Y-symbolSize>>1, symbolSize)
+		text := commafWithDigits(value)
+		textBox := r.MeasureText(text)
+		d.text(text, p.X-textBox.Width()>>1, p.Y-symbolSize>>1-2)
+	}
+}