material-components_material-components-ios/components/FeatureHighlight/examples/FeatureHightlightTypicalUseViewController.swift

// Copyright 2018-present the Material Components for iOS authors. All Rights Reserved.
//
// 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 MaterialComponents.MaterialButtons_ButtonThemer
import MaterialComponents.MaterialButtons
import MaterialComponents.MaterialColorScheme
import MaterialComponents.MaterialFeatureHighlight
import MaterialComponents.MaterialFeatureHighlight_ColorThemer
import MaterialComponents.MaterialTypographyScheme

/// Example to show how to use a feature highlight
class FeatureHighlightSwiftViewController: UIViewController {

  let showButton = MDCButton()
  let featureButton = MDCButton()
  @objc var colorScheme = MDCSemanticColorScheme(defaults: .material201804)
  @objc var typographyScheme = MDCTypographyScheme()
  let buttonScheme = MDCButtonScheme()

  override func viewDidLoad() {
    super.viewDidLoad()
    colorScheme.backgroundColor = .white
    view.backgroundColor = colorScheme.backgroundColor

    showButton.setTitle("Show Feature Highlight", for: .normal)
    showButton.addTarget(self, action: #selector(showFeatureHighlight), for: .touchUpInside)
    MDCContainedButtonThemer.applyScheme(buttonScheme, to: showButton)
    self.view.addSubview(showButton)

    featureButton.setTitle("Feature", for: .normal)
    MDCContainedButtonThemer.applyScheme(buttonScheme, to: featureButton)
    self.view.addSubview(featureButton)
  }

  override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    showButton.sizeToFit()
    showButton.frame.origin.y =
      view.bounds.height - (showButton.frame.height + 60)
    showButton.frame.origin.x = view.center.x - showButton.frame.width / 2

    featureButton.sizeToFit()
    featureButton.frame.origin.x = view.center.x - featureButton.frame.width / 2
    featureButton.frame.origin.y = view.bounds.height / 2 - featureButton.frame.height / 2
  }

  @objc func showFeatureHighlight() {
    let vc = MDCFeatureHighlightViewController(highlightedView: featureButton,
                                               completion: nil)
    MDCFeatureHighlightColorThemer.applySemanticColorScheme(colorScheme, to: vc)
    vc.titleFont = typographyScheme.headline6
    vc.bodyFont = typographyScheme.body2
    vc.mdc_adjustsFontForContentSizeCategory = true
    vc.titleText = "Hey this is a title for the Feature Highlight"
    vc.bodyText = "This is the description of the feature highlight view controller"
    self.present(vc, animated: true, completion: nil)
  }
}

extension FeatureHighlightSwiftViewController {

  @objc class func catalogMetadata() -> [String: Any] {
    return [
      "breadcrumbs": ["Feature Highlight", "Feature Highlight (Swift)"],
      "primaryDemo": false,
      "presentable": false,
    ]
  }
}