Add explicit initializers

[rbdr/patterns] / Sources / Patterns / PatternView.swift

diff --git a/Sources/Patterns/PatternView.swift b/Sources/Patterns/PatternView.swift
new file mode 100644 (file)
index 0000000..be78bde
--- /dev/null
+++ b/Sources/Patterns/PatternView.swift
@@ -0,0 +1,47 @@
+import SwiftUI
+
+public struct PatternView: View {
+
+  @Binding public var design: TileDesign
+  public var pixelSize: CGFloat
+  public var foregroundColor: Color
+  public var backgroundColor: Color
+  
+  private var patternSize: CGFloat {
+    pixelSize * 8.0;
+  }
+  
+  public init(design: Binding<TileDesign>, pixelSize: CGFloat = 2.0, foregroundColor: Color = .black, backgroundColor: Color = .white) {
+    self._design = design
+    self.pixelSize = pixelSize
+    self.foregroundColor = foregroundColor
+    self.backgroundColor = backgroundColor
+  }
+  
+  public var body: some View {
+    GeometryReader { gr in
+      VStack(spacing: 0) {
+        ForEach(0 ..< 1 + Int(ceil(gr.size.height / patternSize)), id: \.self) { i in
+          HStack(spacing: 0) {
+            ForEach(0 ..< Int(ceil(gr.size.width / patternSize)), id: \.self) { j in
+              Tile(design: design, pixelSize: pixelSize, foregroundColor: foregroundColor, backgroundColor: backgroundColor)
+            }
+          }
+        }
+      }
+    }.drawingGroup()
+  }
+}
+
+struct Pattern_Previews: PreviewProvider {
+    static var previews: some View {
+      VStack {
+        Text("Default")
+        PatternView(design: .constant(TileDesign.grid))
+        Text("Color override")
+        PatternView(design: .constant(TileDesign.balls), foregroundColor: .pink, backgroundColor: .cyan)
+        Text("Pixel size override")
+        PatternView(design: .constant(TileDesign.shingles), pixelSize: 8.0)
+      }
+    }
+}