negative frame fix (#23)

Examples/SlidersExamples.xcodeproj/project.pbxproj

@@ -213,7 +213,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1100;
-				LastUpgradeCheck = 1120;
+				LastUpgradeCheck = 1200;
 				TargetAttributes = {
 					FA61E9B2231365E3006A5B6B = {
 						CreatedOnToolsVersion = 11.0;
@@ -384,7 +384,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.15;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MARKETING_VERSION = 1.0.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -456,7 +456,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.15;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MARKETING_VERSION = 1.0.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
@@ -484,6 +484,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -498,6 +499,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				ONLY_ACTIVE_ARCH = YES;
 			};
 			name = Debug;
@@ -517,6 +520,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -530,6 +534,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				MACOSX_DEPLOYMENT_TARGET = 11.0;
 			};
 			name = Release;
 		};
@@ -592,7 +598,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = "SlidersExamples iOS/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -608,7 +614,7 @@
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
+				TARGETED_DEVICE_FAMILY = "1,2,6";
 			};
 			name = Debug;
 		};
@@ -665,7 +671,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = "SlidersExamples iOS/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -680,7 +686,7 @@
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
+				TARGETED_DEVICE_FAMILY = "1,2,6";
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;

Examples/SlidersExamples.xcodeproj/xcshareddata/xcschemes/SlidersExamples iOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1120"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Examples/SlidersExamples.xcodeproj/xcshareddata/xcschemes/SlidersExamples macOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1120"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Package.swift

@@ -1,12 +1,12 @@
-// swift-tools-version:5.2
+// swift-tools-version:5.3
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "Sliders",
     platforms: [
-        .iOS(.v13), .macOS(.v10_15)
+        .iOS(.v14), .macOS(.v11)
     ],
     products: [
         .library(name: "Sliders", targets: ["Sliders"])

Sources/Sliders/Base/LinearRangeMath.swift

@@ -5,5 +5,5 @@ import SwiftUI
 @inlinable func rangeDistance(overallLength: CGFloat, range: ClosedRange<CGFloat>, bounds: ClosedRange<CGFloat> = 0.0...1.0, lowerStartOffset: CGFloat = 0, lowerEndOffset: CGFloat = 0, upperStartOffset: CGFloat = 0, upperEndOffset: CGFloat = 0) -> CGFloat {
     let offsetLowerValue = distanceFrom(value: range.lowerBound, availableDistance: overallLength, bounds: bounds, leadingOffset: lowerStartOffset, trailingOffset: lowerEndOffset)
     let offsetUpperValue = distanceFrom(value: range.upperBound, availableDistance: overallLength, bounds: bounds, leadingOffset: upperStartOffset, trailingOffset: upperEndOffset)
-    return offsetUpperValue - offsetLowerValue
+    return max(0, offsetUpperValue - offsetLowerValue)
 }

Sources/Sliders/Base/LinearValueMath.swift

@@ -5,6 +5,7 @@ import SwiftUI
 
 /// Calculates distance from zero in points
 @inlinable func distanceFrom(value: CGFloat, availableDistance: CGFloat, bounds: ClosedRange<CGFloat> = 0.0...1.0, leadingOffset: CGFloat = 0, trailingOffset: CGFloat = 0) -> CGFloat {
+    guard availableDistance > leadingOffset + trailingOffset else { return 0 }
     let boundsLenght = bounds.upperBound - bounds.lowerBound
     let relativeValue = (value - bounds.lowerBound) / boundsLenght
     let offset = (leadingOffset - ((leadingOffset + trailingOffset) * relativeValue))
@@ -20,43 +21,3 @@ import SwiftUI
     let validatedValue = min(bounds.upperBound, max(bounds.lowerBound, steppedNewValue))
     return validatedValue
 }
-
-
-
-
-
-
-//// Deprications
-
-/// Return a relative value for value in bounds
-/// Example: For value 3.0 in bounds 2.0...4.0 returns 0.5
-@inlinable func relativeValueFrom(value: CGFloat, bounds: ClosedRange<CGFloat> = 0.0...1.0) -> CGFloat {
-    let boundsLenght = bounds.upperBound - bounds.lowerBound
-    return (value - bounds.lowerBound) / boundsLenght
-}
-
-/// Calculates relative position from 0.0 to 1.0 in given lenght where zero offset is in the center.
-/// Example: For offset 0 in lenght 100 returns 0.5
-@inlinable func relativeValueFrom(overallLength: CGFloat, centerOffset: CGFloat) -> CGFloat {
-    (centerOffset + (overallLength / 2)) / overallLength
-}
-
-/// Calculates value for relative point in bounds with step.
-/// Example: For relative value 0.5 in range 2.0..4.0 produces 3.0
-@inlinable func valueFrom(relativeValue: CGFloat, bounds: ClosedRange<CGFloat> = 0.0...1.0, step: CGFloat = 0.001) -> CGFloat {
-    let newValue = bounds.lowerBound + (relativeValue * (bounds.upperBound - bounds.lowerBound))
-    let steppedNewValue = (round(newValue / step) * step)
-    let validatedValue = min(bounds.upperBound, max(bounds.lowerBound, steppedNewValue))
-    return validatedValue
-}
-
-/// Available length should pass width minus slider length.
-@inlinable func offsetFromCenterToValue(overallLength: CGFloat, value: CGFloat, bounds: ClosedRange<CGFloat> = 0.0...1.0, startOffset: CGFloat = 0, endOffset: CGFloat = 0) -> CGFloat {
-    let computedRelativeValue = relativeValueFrom(value: value, bounds: bounds)
-    let offset = (startOffset - ((startOffset + endOffset) * computedRelativeValue))
-    return offset + (computedRelativeValue * overallLength) - (overallLength / 2)
-}
-
-/// Range
-
-