#43: Add the DesignKit package to the project.

* Add ElementTextFieldStyle and static style properties. * Rename button styles, support sizes and simplify colour.
2026-11-02 03:06:37 +00:00 · 2022-06-09 14:44:46 +01:00
parent 7a458377d6
commit 596cf2df0b
16 changed files with 366 additions and 163 deletions
@@ -0,0 +1,95 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+import DesignTokens
+
+public extension ButtonStyle where Self == ElementActionButtonStyle {
+    /// The CTA button style as defined in Compound.
+    /// - Parameter size: The control size to use. Defaults to regular.
+    /// - Parameter color: The color of the button's background. Defaults to the accent color.
+    static func elementAction(_ size: ElementControlSize = .regular,
+                              color: Color = .element.accent) -> ElementActionButtonStyle {
+        ElementActionButtonStyle(size: size, color: color)
+    }
+}
+
+public struct ElementActionButtonStyle: ButtonStyle {
+    @Environment(\.isEnabled) private var isEnabled
+    @Environment(\.colorScheme) private var colorScheme
+    
+    public var size: ElementControlSize
+    public var color: Color
+    
+    private var verticalPadding: CGFloat { size == .xLarge ? 12 : 4 }
+    private var maxWidth: CGFloat? { size == .xLarge ? .infinity : nil }
+    
+    private var fontColor: Color {
+        // Always white unless disabled with a dark theme.
+        .white.opacity(colorScheme == .dark && !isEnabled ? 0.3 : 1.0)
+    }
+    
+    public init(size: ElementControlSize = .regular, color: Color = .element.accent) {
+        self.size = size
+        self.color = color
+    }
+    
+    public func makeBody(configuration: Self.Configuration) -> some View {
+        configuration.label
+            .padding(.horizontal, 12)
+            .padding(.vertical, verticalPadding)
+            .frame(maxWidth: maxWidth)
+            .foregroundColor(fontColor)
+            .font(.element.body)
+            .background(color.opacity(backgroundOpacity(when: configuration.isPressed)))
+            .cornerRadius(8.0)
+    }
+    
+    private func backgroundOpacity(when isPressed: Bool) -> CGFloat {
+        guard isEnabled else { return 0.3 }
+        return isPressed ? 0.6 : 1.0
+    }
+}
+
+public struct ElementActionButtonStyle_Previews: PreviewProvider {
+    public static var states: some View {
+        VStack {
+            Button("Enabled") { /* preview */ }
+                .buttonStyle(ElementActionButtonStyle())
+            
+            Button("Disabled") { /* preview */  }
+                .buttonStyle(ElementActionButtonStyle())
+                .disabled(true)
+            
+            Button { /* preview */  } label: {
+                Text("Clear BG")
+                    .foregroundColor(.element.alert)
+            }
+            .buttonStyle(ElementActionButtonStyle(color: .clear))
+            
+            Button("Red BG") { /* preview */  }
+                .buttonStyle(ElementActionButtonStyle(color: .element.alert))
+        }
+        .padding()
+    }
+    
+    public static var previews: some View {
+        states
+            .preferredColorScheme(.light)
+        states
+            .preferredColorScheme(.dark)
+    }
+}