Support SPM

.gitignore

@@ -0,0 +1,33 @@
+# Mac OS X
+.DS_Store
+
+# SPM
+.swiftpm
+
+## Build generated
+build/
+DerivedData
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+
+## Other
+*.xccheckout
+*.moved-aside
+*.xcuserstate
+*.xcscmblueprint
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+
+# Swift Package Manager
+.build/

Package.swift

@@ -0,0 +1,21 @@
+// swift-tools-version: 5.9
+
+import PackageDescription
+
+let package = Package(
+    name: "RHLinePlot",
+    platforms: [.iOS(.v13)],
+    products: [
+        .library(
+            name: "RHLinePlot",
+            targets: ["RHLinePlot"]),
+    ],
+    targets: [
+        .target(
+            name: "RHLinePlot"),
+        .testTarget(
+            name: "RHLinePlotTests",
+            dependencies: ["RHLinePlot"]
+        ),
+    ]
+)

README.md

@@ -33,6 +33,10 @@ Play around with the example app to see possible customizations and the Robinhoo
 ## Installation
 ### Cocoapods
 `pod install RHLinePlot`
+### Swift Package Manager
+```swift
+.package(url: "https://github.com/aunnnn/RHLinePlot.git", .upToNextMajor(from: "0.1.1")),
+```
 
 Or just use the source however you like. The library is in folder `RHLinePlot`.
 

RHLinePlot.podspec

@@ -16,7 +16,7 @@ A line plot library inspired by the Robinhood app.
   s.author           = { 'Wirawit Rueopas' => '[email protected]' }
   s.source           = { :git => 'https://github.com/aunnnn/RHLinePlot.git', :tag => s.version.to_s }
 
-  s.source_files     = 'RHLinePlot/*.swift'
+  s.source_files     = 'Sources/RHLinePlot/*.swift'
   s.swift_version    = '5.0'
 
   s.ios.deployment_target = '13.0'

RHLinePlot.xcodeproj/project.pbxproj

@@ -87,8 +87,8 @@
 		30C49EA6243F0E1A005D2B54 = {
 			isa = PBXGroup;
 			children = (
-				30C49EB2243F0E1A005D2B54 /* RHLinePlot */,
-				30C49EBD243F0E1A005D2B54 /* RHLinePlotTests */,
+				A3B7489A2D3FF1D500C0E7C1 /* Sources */,
+				A3B7489B2D3FF1DD00C0E7C1 /* Tests */,
 				30A9089924403AF40094A1FC /* RHLinePlotStatic */,
 				30C49EB1243F0E1A005D2B54 /* Products */,
 				30A9089F24403B090094A1FC /* Frameworks */,
@@ -131,6 +131,22 @@
 			path = RHLinePlotTests;
 			sourceTree = "<group>";
 		};
+		A3B7489A2D3FF1D500C0E7C1 /* Sources */ = {
+			isa = PBXGroup;
+			children = (
+				30C49EB2243F0E1A005D2B54 /* RHLinePlot */,
+			);
+			path = Sources;
+			sourceTree = "<group>";
+		};
+		A3B7489B2D3FF1DD00C0E7C1 /* Tests */ = {
+			isa = PBXGroup;
+			children = (
+				30C49EBD243F0E1A005D2B54 /* RHLinePlotTests */,
+			);
+			path = Tests;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -399,11 +415,11 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = B786UKMNU5;
+				DEVELOPMENT_TEAM = X7NSG6U2E5;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
-				INFOPLIST_FILE = RHLinePlot/Info.plist;
+				INFOPLIST_FILE = Sources/RHLinePlot/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -429,11 +445,11 @@
 				"CODE_SIGN_IDENTITY[sdk=macosx*]" = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				DEFINES_MODULE = YES;
-				DEVELOPMENT_TEAM = B786UKMNU5;
+				DEVELOPMENT_TEAM = X7NSG6U2E5;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
-				INFOPLIST_FILE = RHLinePlot/Info.plist;
+				INFOPLIST_FILE = Sources/RHLinePlot/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
 				LD_RUNPATH_SEARCH_PATHS = (

Sources/RHLinePlot/GlowingIndicator.swift

@@ -0,0 +1,58 @@
+//
+//  GlowingIndicator.swift
+//  RHLinePlot
+//
+//  Created by Wirawit Rueopas on 4/9/20.
+//  Copyright © 2020 Wirawit Rueopas. All rights reserved.
+//
+
+import SwiftUI
+
+/// Default indicator with glowing effect. Used to show latest value in a line plot.
+public struct GlowingIndicator: View {
+
+    @State var isGlowing: Bool = false
+    @Environment(\.rhLinePlotConfig) var rhLinePlotConfig
+
+    public init() {}
+
+    private var glowingAnimation: Animation {
+        Animation
+            .easeInOut(duration: rhLinePlotConfig.glowingIndicatorGlowAnimationDuration)
+            .delay(rhLinePlotConfig.glowingIndicatorDelayBetweenGlow)
+            .repeatForever(autoreverses: false)
+    }
+
+    private var glowingBackground: some View {
+        Circle()
+            .scaleEffect(isGlowing ? rhLinePlotConfig.glowingIndicatorBackgroundScaleEffect : 1)
+            .opacity(isGlowing ? 0.0 : 1)
+            .animation(glowingAnimation, value: self.isGlowing)
+            .frame(width: rhLinePlotConfig.glowingIndicatorWidth, height: rhLinePlotConfig.glowingIndicatorWidth)
+    }
+
+    public var body: some View {
+        Circle()
+            .frame(width: rhLinePlotConfig.glowingIndicatorWidth, height: rhLinePlotConfig.glowingIndicatorWidth)
+            .background(glowingBackground)
+            .onAppear {
+                withAnimation {
+                    self.isGlowing = true
+                }
+            }
+            .onDisappear {
+                withAnimation {
+                    self.isGlowing = false
+                }
+        }
+    }
+}
+
+
+struct GlowingIndicator_Previews: PreviewProvider {
+    static var previews: some View {
+        Group {
+            GlowingIndicator()
+        }.previewLayout(.fixed(width: 200, height: 200))
+    }
+}

Sources/RHLinePlot/Info.plist

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(MARKETING_VERSION)</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+</dict>
+</plist>

Sources/RHLinePlot/LinePlotValueStick.swift

@@ -0,0 +1,20 @@
+//
+//  LinePlotValueStick.swift
+//  RHLinePlot
+//
+//  Created by Wirawit Rueopas on 4/9/20.
+//  Copyright © 2020 Wirawit Rueopas. All rights reserved.
+//
+
+import SwiftUI
+
+/// Vertical thin line to show currently selected value within a line plot
+struct LinePlotValueStick: View {
+
+    var lineWidth: CGFloat = 1
+
+    var body: some View {
+        Rectangle()
+            .frame(maxWidth: self.lineWidth, maxHeight: .infinity)
+    }
+}

Sources/RHLinePlot/Misc.swift

@@ -0,0 +1,91 @@
+//
+//  Misc.swift
+//  RHLinePlot
+//
+//  Created by Wirawit Rueopas on 4/9/20.
+//  Copyright © 2020 Wirawit Rueopas. All rights reserved.
+//
+
+import SwiftUI
+
+/// Find highest and lowest values
+func findHighestAndLowest<V: Comparable>(values: [V]) -> (highest: V, lowest: V) {
+    precondition(values.count > 0, "values must not be empty")
+    var highest = values[0]
+    var lowest = values[0]
+    for v in values {
+        if v > highest {
+            highest = v
+        }
+        if v < lowest {
+            lowest = v
+        }
+    }
+    return (highest, lowest)
+}
+
+/// Find the index of `value` on a **sorted** `array`. If not found, return the index to the left.
+///
+/// I.e. for `[1, 3, 5, 10, 30, 55]
+///
+/// Search for `5`  will return `2`. Search for `10` will return `3`. Search for `9` (or any between `5-9`) will return `2` since it's the index on the left.
+///
+/// In other words, segments of this array are: `1-2`, `3-4`, `5-9`, `10-29`, `30-54`, `55-inf`.
+/// and this function will return the active segment in log(N).
+func binarySearchOrIndexToTheLeft<A: RandomAccessCollection, T: Comparable>(array: A, value: T) -> Int? where A.Element == T, A.Index == Int {
+    if array.isEmpty { return nil }
+
+    func search(from: Int, to: Int) -> Int? {
+        let middle = (to + from)/2
+
+        // Base case: middle is exactly the one
+        if array[middle] == value {
+            return middle
+        }
+
+            // Base case: Down to final one,
+            // Return only if value is more than itself ("Nearest smaller")
+        else if from == to {
+            if value >= array[from] {
+                return from
+            } else { // Nope
+                return nil
+            }
+        }
+        else if from > to {
+            return nil
+        }
+        else if value < array[middle] {
+            return search(from: from, to: middle-1)
+        }
+        else {
+            // value > array[middle]
+            // If right side is nil, should return middle
+            return search(from: middle+1, to: to) ?? middle
+        }
+    }
+    return search(from: 0, to: array.count-1)
+}
+
+extension Comparable {
+    func clamp(low: Self, high: Self) -> Self {
+        return min(max(low, self), high)
+    }
+}
+
+extension Path {
+    /// Apply laser light style to the shape
+    func laserLightStroke(lineWidth: CGFloat) -> some View {
+        let content = self
+        return ZStack {
+            content.stroke(lineWidth: lineWidth*3)
+                .blur(radius: 3*lineWidth)
+            content.stroke(lineWidth: lineWidth*2)
+                .blur(radius: 2*lineWidth)
+            content.stroke(Color.white, style: StrokeStyle(
+                lineWidth: lineWidth,
+                lineCap: .round,
+                lineJoin: .round))
+        }
+    }
+}