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refactor: reset

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This commit is contained in:
vicanso 2022-05-16 20:58:41 +08:00
parent 7e80e9a848
commit c363d1d5e3
50 changed files with 55 additions and 10282 deletions
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226
legend.go
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@ -1,226 +0,0 @@
// 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 (
"strconv"
"strings"
"github.com/wcharczuk/go-chart/v2"
)
type LegendOption struct {
theme string
// Legend show flag, if nil or true, the legend will be shown
Show *bool
// Legend text style
Style chart.Style
// Text array of legend
Data []string
// Distance between legend component and the left side of the container.
// It can be pixel value: 20, percentage value: 20%,
// or position value: right, center.
Left string
// Distance between legend component and the top side of the container.
// It can be pixel value: 20.
Top string
// Legend marker and text aligning, it can be left or right, default is left.
Align string
// The layout orientation of legend, it can be horizontal or vertical, default is horizontal.
Orient string
// Icon of the legend.
Icon string
}
const (
LegendIconRect = "rect"
)
// NewLegendOption creates a new legend option by legend text list
func NewLegendOption(data []string, position ...string) LegendOption {
opt := LegendOption{
Data: data,
}
if len(position) != 0 {
opt.Left = position[0]
}
return opt
}
type legend struct {
d *Draw
opt *LegendOption
}
func NewLegend(d *Draw, opt LegendOption) *legend {
return &legend{
d: d,
opt: &opt,
}
}
func (l *legend) Render() (chart.Box, error) {
d := l.d
opt := l.opt
if len(opt.Data) == 0 || isFalse(opt.Show) {
return chart.BoxZero, nil
}
theme := NewTheme(opt.theme)
padding := opt.Style.Padding
legendDraw, err := NewDraw(DrawOption{
Parent: d,
}, PaddingOption(padding))
if err != nil {
return chart.BoxZero, err
}
r := legendDraw.Render
opt.Style.GetTextOptions().WriteToRenderer(r)
x := 0
y := 0
top := 0
// TODO TOP 暂只支持数值
if opt.Top != "" {
top, _ = strconv.Atoi(opt.Top)
y += top
}
legendWidth := 30
legendDotHeight := 5
textPadding := 5
legendMargin := 10
// 往下移2倍dot的高度
y += 2 * legendDotHeight
widthCount := 0
maxTextWidth := 0
// 文本宽度
for _, text := range opt.Data {
b := r.MeasureText(text)
if b.Width() > maxTextWidth {
maxTextWidth = b.Width()
}
widthCount += b.Width()
}
if opt.Orient == OrientVertical {
widthCount = maxTextWidth + legendWidth + textPadding
} else {
// 加上标记
widthCount += legendWidth * len(opt.Data)
// 文本的padding
widthCount += 2 * textPadding * len(opt.Data)
// margin的宽度
widthCount += legendMargin * (len(opt.Data) - 1)
}
left := 0
switch opt.Left {
case PositionRight:
left = legendDraw.Box.Width() - widthCount
case PositionCenter:
left = (legendDraw.Box.Width() - widthCount) >> 1
default:
if strings.HasSuffix(opt.Left, "%") {
value, _ := strconv.Atoi(strings.ReplaceAll(opt.Left, "%", ""))
left = legendDraw.Box.Width() * value / 100
} else {
value, _ := strconv.Atoi(opt.Left)
left = value
}
}
x = left
for index, text := range opt.Data {
textBox := r.MeasureText(text)
var renderText func()
if opt.Orient == OrientVertical {
// 垂直
// 重置x的位置
x = left
renderText = func() {
x += textPadding
legendDraw.text(text, x, y+legendDotHeight)
x += textBox.Width()
y += (2*legendDotHeight + legendMargin)
}
} else {
// 水平
if index != 0 {
x += legendMargin
}
renderText = func() {
x += textPadding
legendDraw.text(text, x, y+legendDotHeight)
x += textBox.Width()
x += textPadding
}
}
if opt.Align == PositionRight {
renderText()
}
seriesColor := theme.GetSeriesColor(index)
fillColor := seriesColor
if !theme.IsDark() {
fillColor = theme.GetBackgroundColor()
}
style := chart.Style{
StrokeColor: seriesColor,
FillColor: fillColor,
StrokeWidth: 3,
}
if opt.Icon == LegendIconRect {
style.FillColor = seriesColor
style.StrokeWidth = 1
}
style.GetFillAndStrokeOptions().WriteDrawingOptionsToRenderer(r)
if opt.Icon == LegendIconRect {
legendDraw.moveTo(x, y-legendDotHeight)
legendDraw.lineTo(x+legendWidth, y-legendDotHeight)
legendDraw.lineTo(x+legendWidth, y+legendDotHeight)
legendDraw.lineTo(x, y+legendDotHeight)
legendDraw.lineTo(x, y-legendDotHeight)
r.FillStroke()
} else {
legendDraw.moveTo(x, y)
legendDraw.lineTo(x+legendWidth, y)
r.Stroke()
legendDraw.circle(float64(legendDotHeight), x+legendWidth>>1, y)
r.FillStroke()
}
x += legendWidth
if opt.Align != PositionRight {
renderText()
}
}
legendBox := padding.Clone()
// 计算展示区域
if opt.Orient == OrientVertical {
legendBox.Right = legendBox.Left + left + maxTextWidth + legendWidth + textPadding
legendBox.Bottom = legendBox.Top + y
} else {
legendBox.Right = legendBox.Left + x
legendBox.Bottom = legendBox.Top + 2*legendDotHeight + top + textPadding
}
return legendBox, nil
}