77 lines
2.5 KiB
Go
77 lines
2.5 KiB
Go
// MIT License
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// Copyright (c) 2022 Tree Xie
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package charts
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import (
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"github.com/dustin/go-humanize"
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"github.com/wcharczuk/go-chart/v2"
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)
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type LabelRenderer struct {
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Options SeriesLabel
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Offset chart.Box
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}
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type LabelValue struct {
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Left int
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Top int
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Text string
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}
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func (l LabelRenderer) Render(r chart.Renderer, canvasBox chart.Box, xrange, yrange chart.Range, style chart.Style, vs chart.ValuesProvider) {
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if !l.Options.Show {
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return
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}
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r.SetFontColor(style.FontColor)
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r.SetFontSize(style.FontSize)
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r.SetFont(style.Font)
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offsetX := l.Options.Offset.Left + l.Offset.Left
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offsetY := l.Options.Offset.Top + l.Offset.Top
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for i := 0; i < vs.Len(); i++ {
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vx, vy := vs.GetValues(i)
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x := canvasBox.Left + xrange.Translate(vx) + offsetX
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y := canvasBox.Bottom - yrange.Translate(vy) + offsetY
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text := humanize.CommafWithDigits(vy, 2)
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// 往左移一半距离
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x -= r.MeasureText(text).Width() >> 1
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r.Text(text, x, y)
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}
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}
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func (l LabelRenderer) CustomizeRender(r chart.Renderer, style chart.Style, values []LabelValue) {
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if !l.Options.Show {
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return
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}
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r.SetFont(style.Font)
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r.SetFontColor(style.FontColor)
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r.SetFontSize(style.FontSize)
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offsetX := l.Options.Offset.Left + l.Offset.Left
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offsetY := l.Options.Offset.Top + l.Offset.Top
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for _, value := range values {
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x := value.Left + offsetX
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y := value.Top + offsetY
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text := value.Text
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x -= r.MeasureText(text).Width() >> 1
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r.Text(text, x, y)
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}
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}
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