Merge pull request #2 from TouchInstinct/block_minimum_reached

Added block call when minimum is reached

GMStepper.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "GMStepper"
-  s.version          = "2.2"
+  s.version          = "2.2.1"
   s.summary          = "A stepper with a sliding label in the middle."
   s.homepage         = "https://github.com/gmertk/GMStepper"
   s.screenshots      = "https://raw.githubusercontent.com/gmertk/GMStepper/master/Screenshots/screenshot_1.gif"

GMStepper/GMStepper.swift

@@ -15,6 +15,8 @@ import UIKit
         didSet {
             value = min(maximumValue, max(minimumValue, value))
 
+            handleIsLimitReached()
+
             label.text = formattedValue
 
             if oldValue != value {
@@ -35,7 +37,6 @@ import UIKit
         }
     }
 
-
     /// Minimum value. Must be less than maximumValue. Defaults to 0.
     @objc @IBInspectable public var minimumValue: Double = 0 {
         didSet {
@@ -67,29 +68,37 @@ import UIKit
         }
     }
 
-    /// Text on the left button. Be sure that it fits in the button. Defaults to "−".
-    @objc @IBInspectable public var leftButtonText: String = "−" {
+    /// Image on the left button. Defaults to nil.
+    @objc @IBInspectable public var leftButtonImage: UIImage? = nil {
         didSet {
-            leftButton.setTitle(leftButtonText, for: .normal)
+            leftButton.setImage(leftButtonImage, for: .normal)
         }
     }
 
-    /// Text on the right button. Be sure that it fits in the button. Defaults to "+".
-    @objc @IBInspectable public var rightButtonText: String = "+" {
+    /// Image on the right button. Defaults to nil.
+    @objc @IBInspectable public var rightButtonImage: UIImage? = nil {
         didSet {
-            rightButton.setTitle(rightButtonText, for: .normal)
+            rightButton.setImage(rightButtonImage, for: .normal)
         }
     }
 
-    /// Text color of the buttons. Defaults to white.
-    @objc @IBInspectable public var buttonsTextColor: UIColor = UIColor.white {
+    /// Left button content insets. Defaults to ".zero".
+    @objc @IBInspectable public var leftButtonContentInsets: UIEdgeInsets = .zero {
         didSet {
-            for button in [leftButton, rightButton] {
-                button.setTitleColor(buttonsTextColor, for: .normal)
-            }
+            leftButton.contentEdgeInsets = leftButtonContentInsets
         }
     }
 
+    /// Right button content insets. Defaults to ".zero".
+    @objc @IBInspectable public var rightButtonContentInsets: UIEdgeInsets = .zero {
+        didSet {
+            rightButton.contentEdgeInsets = rightButtonContentInsets
+        }
+    }
+
+    /// Left button limit opacity. Defaults to "0.4".
+    @objc @IBInspectable public var leftButtonLimitOpacity: CGFloat = 0.4
+
     /// Background color of the buttons. Defaults to dark blue.
     @objc @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {
         didSet {
@@ -100,15 +109,12 @@ import UIKit
         }
     }
 
-    /// Font of the buttons. Defaults to AvenirNext-Bold, 20.0 points in size.
-    @objc public var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)! {
-        didSet {
-            for button in [leftButton, rightButton] {
-                button.titleLabel?.font = buttonsFont
-            }
-        }
-    }
-
+    /// Label tap closure
+    @objc public var didTouchLabel: ((Double) -> Void)?
+    
+    /// Block is called when the minimum is exceeded
+    @objc public var minimumExceeded: (() -> Void)?
+    
     /// Text color of the middle label. Defaults to white.
     @objc @IBInspectable public var labelTextColor: UIColor = UIColor.white {
         didSet {
@@ -188,10 +194,8 @@ import UIKit
 
     lazy var leftButton: UIButton = {
         let button = UIButton()
-        button.setTitle(self.leftButtonText, for: .normal)
-        button.setTitleColor(self.buttonsTextColor, for: .normal)
+        button.setImage(self.leftButtonImage, for: .normal)
         button.backgroundColor = self.buttonsBackgroundColor
-        button.titleLabel?.font = self.buttonsFont
         button.addTarget(self, action: #selector(GMStepper.leftButtonTouchDown), for: .touchDown)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
@@ -201,10 +205,8 @@ import UIKit
 
     lazy var rightButton: UIButton = {
         let button = UIButton()
-        button.setTitle(self.rightButtonText, for: .normal)
-        button.setTitleColor(self.buttonsTextColor, for: .normal)
+        button.setImage(self.rightButtonImage, for: .normal)
         button.backgroundColor = self.buttonsBackgroundColor
-        button.titleLabel?.font = self.buttonsFont
         button.addTarget(self, action: #selector(GMStepper.rightButtonTouchDown), for: .touchDown)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
@@ -225,6 +227,8 @@ import UIKit
         let panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(GMStepper.handlePan))
         panRecognizer.maximumNumberOfTouches = 1
         label.addGestureRecognizer(panRecognizer)
+        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(GMStepper.handleLabelTap))
+        label.addGestureRecognizer(tapRecognizer)
         return label
     }()
 
@@ -296,6 +300,7 @@ import UIKit
         addSubview(rightButton)
         addSubview(label)
 
+        handleIsLimitReached()
         backgroundColor = buttonsBackgroundColor
         layer.cornerRadius = cornerRadius
         clipsToBounds = true
@@ -407,6 +412,10 @@ extension GMStepper {
         }
     }
 
+    @objc func handleLabelTap() {
+        didTouchLabel?(value)
+    }
+
     @objc func reset() {
         panState = .Stable
         stepperState = .Stable
@@ -433,11 +442,11 @@ extension GMStepper {
 
         if value == minimumValue {
             animateLimitHitIfNeeded()
+            minimumExceeded?()
         } else {
             stepperState = .ShouldDecrease
             animateSlideLeft()
         }
-
     }
 
     @objc func rightButtonTouchDown(button: UIButton) {
@@ -519,8 +528,16 @@ extension GMStepper {
     }
 }
 
+private extension GMStepper {
+
+    func handleIsLimitReached() {
+        let isLimitReached = value == minimumValue
+        leftButton.alpha = isLimitReached ? leftButtonLimitOpacity : 1
+    }
+}
 
 extension Decimal {
+    
     var significantFractionalDecimalDigits: Int {
         return max(-exponent, 0)
     }