feat: support mark line and mark point render

chart_option.go

@@ -0,0 +1,120 @@
+// 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 (
+	"sort"
+
+	"github.com/golang/freetype/truetype"
+	"github.com/wcharczuk/go-chart/v2"
+)
+
+type ChartOption struct {
+	theme ColorPalette
+	font  *truetype.Font
+	// The output type of chart, "svg" or "png", default value is "svg"
+	Type string
+	// The font family, which should be installed first
+	FontFamily string
+	// The theme of chart, "light" and "dark".
+	// The default theme is "light"
+	Theme string
+	// The title option
+	Title TitleOption
+	// The legend option
+	Legend LegendOption
+	// The x axis option
+	XAxis XAxisOption
+	// The y axis option list
+	YAxisOptions []YAxisOption
+	// The width of chart, default width is 600
+	Width int
+	// The height of chart, default height is 400
+	Height int
+	Parent *Painter
+	// The padding for chart, default padding is [20, 10, 10, 10]
+	Padding Box
+	// The canvas box for chart
+	Box Box
+	// The series list
+	SeriesList SeriesList
+	// The radar indicator list
+	// RadarIndicators []RadarIndicator
+	// The background color of chart
+	BackgroundColor Color
+	// The child charts
+	Children []ChartOption
+}
+
+func (o *ChartOption) fillDefault() {
+	t := NewTheme(o.Theme)
+	o.theme = t
+	// 如果为空，初始化
+	axisCount := 1
+	for _, series := range o.SeriesList {
+		if series.AxisIndex >= axisCount {
+			axisCount++
+		}
+	}
+	o.Width = getDefaultInt(o.Width, defaultChartWidth)
+	o.Height = getDefaultInt(o.Height, defaultChartHeight)
+	yAxisOptions := make([]YAxisOption, axisCount)
+	copy(yAxisOptions, o.YAxisOptions)
+	o.YAxisOptions = yAxisOptions
+	o.font, _ = GetFont(o.FontFamily)
+
+	if o.font == nil {
+		o.font, _ = chart.GetDefaultFont()
+	}
+	if o.BackgroundColor.IsZero() {
+		o.BackgroundColor = t.GetBackgroundColor()
+	}
+	if o.Padding.IsZero() {
+		o.Padding = chart.Box{
+			Top:    10,
+			Right:  10,
+			Bottom: 10,
+			Left:   10,
+		}
+	}
+	// legend与series name的关联
+	if len(o.Legend.Data) == 0 {
+		o.Legend.Data = o.SeriesList.Names()
+	} else {
+		seriesCount := len(o.SeriesList)
+		for index, name := range o.Legend.Data {
+			if index < seriesCount &&
+				len(o.SeriesList[index].Name) == 0 {
+				o.SeriesList[index].Name = name
+			}
+		}
+		nameIndexDict := map[string]int{}
+		for index, name := range o.Legend.Data {
+			nameIndexDict[name] = index
+		}
+		// 保证series的顺序与legend一致
+		sort.Slice(o.SeriesList, func(i, j int) bool {
+			return nameIndexDict[o.SeriesList[i].Name] < nameIndexDict[o.SeriesList[j].Name]
+		})
+	}
+}