added drawing rectangles and min bar heights

Example/WaveformScrubberExample/ContentView.swift

@@ -27,7 +27,7 @@ struct ContentView: View {
                         Section("Audio") {
                             WaveformScrubber(
                                 config: scrubberConfig,
-                                drawer: BarDrawer(config: .init(barWidth: 2, spacing: 2), upsampleStrategy: .smooth),
+                                drawer: BarDrawer(config: .init(barWidth: 2, spacing: 2, minBarHeight: 4, cornerRadius: 2), upsampleStrategy: .smooth),
                                 url: audioURL,
                                 progress: $progress
                             ) { info in

README.md

@@ -84,7 +84,7 @@ A "Drawer" defines the geometric shape of the waveform. You can choose from seve
 The classic bar graph style.
 ```swift
 WaveformScrubber(
-    drawer: BarDrawer(config: .init(barWidth: 3, spacing: 5)),
+    drawer: BarDrawer(config: .init(barWidth: 4, spacing: 5, minBarHeight: 4, cornerRadius: 2)),
     url: audioURL,
     progress: $progress
 )

Sources/WaveformScrubber/Domain/Shapes/BarDrawer/BarDrawer+Config.swift

@@ -9,19 +9,31 @@ import SwiftUI
 
 extension BarDrawer {
     public struct Config: Sendable {
-        public let barWidth: CGFloat
-        public let spacing: CGFloat
+        /// Width of each bar.
+        public var barWidth: CGFloat
+        /// Spacing between bars.
+        public var spacing: CGFloat
+        /// Minimum height for each bar (to ensure visibility).
+        public var minBarHeight: CGFloat
+        /// Corner radius for rounding bar edges.
+        public var cornerRadius: CGFloat
 
         /// Creates a new configuration for the `BarDrawer`'s appearance.
         /// - Parameters:
         ///   - spacing: The distance between each waveform bar. Defaults to `2`.
         ///   - barWidth: The width of each waveform bar. Defaults to `2`.
+        ///   - minBarHeight: Minimum height for each bar (to ensure visibility). Defaults to `1`.
+        ///   - cornerRadius: Corner radius for rounding bar edges. Defaults to `0`.
         public init(
             barWidth: CGFloat = 2,
-            spacing: CGFloat = 2
+            spacing: CGFloat = 2,
+            minBarHeight: CGFloat = 1,
+            cornerRadius: CGFloat = 0
         ) {
             self.barWidth = barWidth
             self.spacing = spacing
+            self.minBarHeight = minBarHeight
+            self.cornerRadius = cornerRadius
         }
     }
 }

Sources/WaveformScrubber/Domain/Shapes/BarDrawer/BarDrawer.swift

@@ -29,16 +29,20 @@ public struct BarDrawer: WaveformDrawing {
 
             for (index, sample) in samples.enumerated() {
                 let x = CGFloat(index) * totalBarWidth
-                // Ensure height is at least 1 to be visible
-                let height = max(1, CGFloat(sample) * rect.height)
+                let rawHeight = CGFloat(sample) * rect.height
+                // Ensure height is at least minBarHeight to be visible
+                let height = max(config.minBarHeight, rawHeight)
 
                 let barRect = CGRect(
                     x: x,
                     y: midY - height / 2,
                     width: config.barWidth,
                     height: height
                 )
-                path.addRect(barRect)
+                path.addRoundedRect(
+                    in: barRect,
+                    cornerSize: CGSize(width: config.cornerRadius, height: config.cornerRadius)
+                )
             }
         }
     }