102 lines
2.9 KiB
Go
102 lines
2.9 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/wcharczuk/go-chart/v2"
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)
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func barChartRender(opt ChartOption, result *basicRenderResult) (*Draw, error) {
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d, err := NewDraw(DrawOption{
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Parent: result.d,
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}, PaddingOption(chart.Box{
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Top: result.titleBox.Height(),
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Left: YAxisWidth,
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}))
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if err != nil {
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return nil, err
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}
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yRange := result.yRange
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xRange := result.xRange
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x0, x1 := xRange.GetRange(0)
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width := int(x1 - x0)
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// 每一块之间的margin
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margin := 10
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// 每一个bar之间的margin
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barMargin := 5
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seriesCount := len(opt.SeriesList)
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// 总的宽度-两个margin-(总数-1)的barMargin
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barWidth := (width - 2*margin - barMargin*(seriesCount-1)) / len(opt.SeriesList)
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barMaxHeight := yRange.Size
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theme := NewTheme(opt.Theme)
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seriesNames := opt.Legend.Data
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r := d.Render
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for i, series := range opt.SeriesList {
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for j, item := range series.Data {
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x0, _ := xRange.GetRange(j)
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x := int(x0)
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x += margin
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if i != 0 {
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x += i * (barWidth + barMargin)
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}
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h := int(yRange.getHeight(item.Value))
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fillColor := theme.GetSeriesColor(i)
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if !item.Style.FillColor.IsZero() {
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fillColor = item.Style.FillColor
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}
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d.Bar(chart.Box{
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Top: barMaxHeight - h,
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Left: x,
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Right: x + barWidth,
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Bottom: barMaxHeight - 1,
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}, BarStyle{
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FillColor: fillColor,
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})
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if !series.Label.Show {
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continue
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}
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text := NewValueLabelFormater(seriesNames, series.Label.Formatter)(i, item.Value, -1)
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labelStyle := chart.Style{
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FontColor: theme.GetTextColor(),
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FontSize: 10,
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Font: opt.Font,
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}
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if !series.Label.Color.IsZero() {
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labelStyle.FontColor = series.Label.Color
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}
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labelStyle.GetTextOptions().WriteToRenderer(r)
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textBox := r.MeasureText(text)
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d.text(text, x+(barWidth-textBox.Width())>>1, barMaxHeight-h-5)
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}
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}
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return result.d, nil
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}
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