feat: support between ticks

range.go

@@ -0,0 +1,52 @@
+// MIT License
+
+// Copyright (c) 2021 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 Range struct {
+	TickPosition chart.TickPosition
+	chart.ContinuousRange
+}
+
+func wrapRange(r chart.Range, tickPosition chart.TickPosition) chart.Range {
+	xr, ok := r.(*chart.ContinuousRange)
+	if !ok {
+		return r
+	}
+	return &Range{
+		TickPosition:    tickPosition,
+		ContinuousRange: *xr,
+	}
+}
+
+// Translate maps a given value into the ContinuousRange space.
+func (r Range) Translate(value float64) int {
+	v := r.ContinuousRange.Translate(value)
+	if r.TickPosition == chart.TickPositionBetweenTicks {
+		v -= int(float64(r.Domain) / (r.GetDelta() * 2))
+	}
+	return v
+}