feat: support title render function

xaxis.go

@@ -0,0 +1,69 @@
+// 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/wcharczuk/go-chart/v2"
+
+type XAxisOption struct {
+	BoundaryGap *bool
+	Data        []string
+	// TODO split number
+}
+
+// drawXAxis draws x axis, and returns the height, range of if.
+func drawXAxis(d *Draw, opt *XAxisOption, theme *Theme) (int, *Range, error) {
+	dXAxis, err := NewDraw(
+		DrawOption{
+			Parent: d,
+		},
+		PaddingOption(chart.Box{
+			Left: YAxisWidth,
+		}),
+	)
+	if err != nil {
+		return 0, nil, err
+	}
+	data := NewAxisDataListFromStringList(opt.Data)
+	style := AxisStyle{
+		BoundaryGap: opt.BoundaryGap,
+		StrokeColor: theme.GetAxisStrokeColor(),
+		FontColor:   theme.GetAxisStrokeColor(),
+		StrokeWidth: 1,
+	}
+
+	boundary := true
+	max := float64(len(opt.Data))
+	if opt.BoundaryGap != nil && !*opt.BoundaryGap {
+		boundary = false
+		max--
+	}
+
+	dXAxis.Axis(data, style)
+	return d.measureAxis(data, style), &Range{
+		divideCount: len(opt.Data),
+		Min:         0,
+		Max:         max,
+		Size:        dXAxis.Box.Width(),
+		Boundary:    boundary,
+	}, nil
+}