| // 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 <UIKit/UIKit.h> |
| |
| /** |
| A protocol view controllers should conform to for enabling the view controller to be |
| used as a drawer header view controller. |
| */ |
| @protocol MDCBottomDrawerHeader |
| |
| @optional |
| /** |
| The drawer header transition to top ratio: zero represents the drawer being |
| fully displayed as part of the content, one represents the drawer being fully |
| displayed as a top header. |
| |
| @param transitionToTopRatio moves between 0 to 1 as the transition of the header view |
| transforms from being above the content to becoming sticky on the top. It is 0 when the drawer |
| is above the content and starts changing as the header view expands to cover the status bar and |
| safe area based on the completion rate. It is 1 once the header finishes its transition to become |
| sticky on the top and it's height is at the size of its preferredContentSize + the safe area. |
| */ |
| - (void)updateDrawerHeaderTransitionRatio:(CGFloat)transitionToTopRatio; |
| |
| @end |
