Mercurial > public > stock-charts

annotate InteractiveCharts/LineChart/Helpers/LinePath.swift @ 5:f828c7c408d4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add source code
author Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
date Mon, 26 Apr 2021 19:02:46 +0200
parents
children 959175ee5ebd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
1 //
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
2 // LinePath.swift
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
3 // InteractiveCharts
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
4 //
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
5 // Created by Dennis Concepción Martín on 26/4/21.
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
6 //
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
7
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
8 import SwiftUI
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
9
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
10 struct LinePath: Shape {
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
11 var data: [Double]
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
12 var (width, height): (CGFloat, CGFloat)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
13
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
14 func path(in rect: CGRect) -> Path {
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
15 var path = Path()
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
16
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
17 let normalizedData = normalize(data)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
18 let widthBetweenDataPoints = Double(width) / Double(normalizedData.count - 1) // Remove first point
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
19 let initialPoint = normalizedData[0] * Double(height)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
20 var x: Double = 0
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
21
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
22 var pathPoints = [CGPoint]()
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
23
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
24 path.move(to: CGPoint(x: x, y: initialPoint))
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
25 for y in normalizedData {
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
26 if normalizedData.firstIndex(of: y) != 0 { // Skip first point
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
27 x += widthBetweenDataPoints
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
28 let y = y * Double(height)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
29 path.addLine(to: CGPoint(x: x, y: y))
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
30 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
31
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
32 // Append current point to an array. Later will be used for Drag Gesture
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
33 pathPoints.append(path.currentPoint!)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
34 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
35
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
36 return path
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
37 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
38
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
39 /*
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
40 Get data -> normalize it -> 0 <= output <= 1
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
41 */
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
42 func normalize(_ data: [Double]) -> [Double] {
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
43 var normalData = [Double]()
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
44 let min = data.min()!
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
45 let max = data.max()!
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
46
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
47 for value in data {
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
48 let normal = (value - min) / (max - min)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
49 normalData.append(normal)
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
50 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
51
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
52 return normalData
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
53 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
54 }
f828c7c408d4 Add source code
Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
parents:
diff changeset
55