115 lines
3 KiB
Go
115 lines
3 KiB
Go
// 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 TitleOption struct {
|
|
Text string
|
|
Style chart.Style
|
|
Left string
|
|
Top string
|
|
}
|
|
type titleMeasureOption struct {
|
|
width int
|
|
height int
|
|
text string
|
|
}
|
|
|
|
func drawTitle(d *Draw, opt *TitleOption) (chart.Box, error) {
|
|
if len(opt.Text) == 0 {
|
|
return chart.BoxZero, nil
|
|
}
|
|
|
|
padding := opt.Style.Padding
|
|
titleDraw, err := NewDraw(DrawOption{
|
|
Parent: d,
|
|
}, PaddingOption(padding))
|
|
if err != nil {
|
|
return chart.BoxZero, err
|
|
}
|
|
|
|
r := titleDraw.Render
|
|
opt.Style.GetTextOptions().WriteToRenderer(r)
|
|
arr := strings.Split(opt.Text, "\n")
|
|
textMaxWidth := 0
|
|
textMaxHeight := 0
|
|
width := 0
|
|
measureOptions := make([]titleMeasureOption, len(arr))
|
|
for index, str := range arr {
|
|
textBox := r.MeasureText(str)
|
|
|
|
w := textBox.Width()
|
|
h := textBox.Height()
|
|
if w > textMaxWidth {
|
|
textMaxWidth = w
|
|
}
|
|
if h > textMaxHeight {
|
|
textMaxHeight = h
|
|
}
|
|
measureOptions[index] = titleMeasureOption{
|
|
text: str,
|
|
width: w,
|
|
height: h,
|
|
}
|
|
}
|
|
width = textMaxWidth
|
|
titleX := 0
|
|
b := titleDraw.Box
|
|
switch opt.Left {
|
|
case PositionRight:
|
|
titleX = b.Width() - textMaxWidth
|
|
case PositionCenter:
|
|
titleX = b.Width()>>1 - (textMaxWidth >> 1)
|
|
default:
|
|
if strings.HasSuffix(opt.Left, "%") {
|
|
value, _ := strconv.Atoi(strings.ReplaceAll(opt.Left, "%", ""))
|
|
titleX = b.Width() * value / 100
|
|
} else {
|
|
value, _ := strconv.Atoi(opt.Left)
|
|
titleX = value
|
|
}
|
|
}
|
|
titleY := 0
|
|
// TODO TOP 暂只支持数值
|
|
if opt.Top != "" {
|
|
value, _ := strconv.Atoi(opt.Top)
|
|
titleY += value
|
|
}
|
|
for _, item := range measureOptions {
|
|
x := titleX + (textMaxWidth-item.width)>>1
|
|
titleDraw.text(item.text, x, titleY)
|
|
titleY += textMaxHeight
|
|
}
|
|
height := titleY + padding.Top + padding.Bottom
|
|
box := padding.Clone()
|
|
box.Right = box.Left + width
|
|
box.Bottom = box.Top + height
|
|
|
|
return box, nil
|
|
}
|