updated slider

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDSSample/Classes/Slider.swift

@@ -6,3 +6,49 @@
 //
 
 import Foundation
+import UIKit
+import VDS
+
+class Slider: Control, UITextFieldDelegate {
+    var textField = NumericField().with { $0.translatesAutoresizingMaskIntoConstraints = false }
+    var range = UISlider().with { $0.translatesAutoresizingMaskIntoConstraints = false }
+    var maximumValue: Float = 0.0  { didSet { range.maximumValue = maximumValue }}
+    var minimumValue: Float = 0.0 { didSet { range.minimumValue = minimumValue }}
+    var value: Float = 0.0 { didSet { range.value = value; setNeedsUpdate() }}
+    override func setup() {
+        addSubview(textField)
+        addSubview(range)
+        textField.delegate = self
+        textField.pinTop()
+        textField.pinBottom()
+        textField.pinLeading()
+        textField.heightAnchor.constraint(equalToConstant: 44).isActive = true
+        textField.widthAnchor.constraint(equalToConstant: 75).isActive = true
+        textField.pinTrailing(range.leadingAnchor, 10)
+        range.pinTop()
+        range.pinBottom()
+        range.pinTrailing()
+        
+        range.thumbTintColor = .systemBlue
+        range.publisher(for: .valueChanged).sink { [weak self] slider in
+            self?.valueChanged(newValue: slider.value)
+        }.store(in: &subscribers)
+    }
+    
+    override func updateView() {
+        textField.text = String(format: "%.2f", value)
+    }
+    
+    private func valueChanged(newValue: Float) {
+        value = newValue
+        sendActions(for: .valueChanged)
+    }
+    
+    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+        textField.resignFirstResponder()
+        if let text = textField.text, let n = NumberFormatter().number(from: text) {
+            valueChanged(newValue: n.floatValue)
+        }
+        return true
+    }
+}