85 lines
2.3 KiB
Go
85 lines
2.3 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 (
|
||
"math"
|
||
)
|
||
|
||
type Range struct {
|
||
divideCount int
|
||
Min float64
|
||
Max float64
|
||
Size int
|
||
Boundary bool
|
||
}
|
||
|
||
func NewRange(min, max float64, divideCount int) Range {
|
||
r := math.Abs(max - min)
|
||
|
||
// 最小单位计算
|
||
unit := 5
|
||
if r > 100 {
|
||
unit = 20
|
||
}
|
||
unit = int((r/float64(divideCount))/float64(unit))*unit + unit
|
||
|
||
if min != 0 {
|
||
min = float64(int(min/float64(unit)) * unit)
|
||
// 如果是小于0，int的时候向上取整了，因此调整
|
||
if min < 0 {
|
||
min -= float64(unit)
|
||
}
|
||
}
|
||
max = min + float64(unit*divideCount)
|
||
return Range{
|
||
Min: min,
|
||
Max: max,
|
||
divideCount: divideCount,
|
||
}
|
||
}
|
||
|
||
func (r *Range) getHeight(value float64) int {
|
||
v := (value - r.Min) / (r.Max - r.Min)
|
||
return int(v * float64(r.Size))
|
||
}
|
||
|
||
func (r *Range) getRestHeight(value float64) int {
|
||
v := 1 - (value-r.Min)/(r.Max-r.Min)
|
||
return int(v * float64(r.Size))
|
||
}
|
||
|
||
func (r *Range) GetRange(index int) (float64, float64) {
|
||
unit := float64(r.Size) / float64(r.divideCount)
|
||
return unit * float64(index), unit * float64(index+1)
|
||
}
|
||
|
||
func (r *Range) getWidth(value float64) int {
|
||
v := value / (r.Max - r.Min)
|
||
// 移至居中
|
||
if r.Boundary &&
|
||
r.divideCount != 0 {
|
||
v += 1 / float64(r.divideCount*2)
|
||
}
|
||
return int(v * float64(r.Size))
|
||
}
|