| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| library fuchsia.ui.policy; |
| |
| using fuchsia.ui.views; |
| |
| /// The Presenter service provides a way for applications to ask that a view be |
| /// added to a view tree, leaving any window management concerns up to the |
| /// discretion of the presenter implementation. |
| [Discoverable] |
| protocol Presenter { |
| /// Request that the View's contents be displayed on the screen as a `Presentation`. |
| /// Each call to `PresentView` creates a new `Presentation`. Having more than one simultaneous |
| /// `Presentation` (i.e. calling `PresentView` more than once) is not allowed and will result |
| // in an error and channel closure. |
| PresentView(fuchsia.ui.views.ViewHolderToken view_holder_token, request<Presentation>? presentation_request); |
| |
| /// Request that the View's contents be displayed on the screen as a `Presentation`. |
| /// Destroys any existing presentations and replaces them with the new one. |
| /// This is true whether the existing view was created by a call to |
| /// PresentView, PresentOrReplaceView or PresentOrReplaceView2. |
| PresentOrReplaceView(fuchsia.ui.views.ViewHolderToken view_holder_token, request<Presentation>? presentation_request); |
| |
| // Same as PresentOrReplaceView, except it also takes a ViewRef. |
| // The ViewRef should be referring to the same View as the ViewHolderToken. |
| // The ViewRef is used for transfering focus the View after initialization. |
| PresentOrReplaceView2(fuchsia.ui.views.ViewHolderToken view_holder_token, |
| fuchsia.ui.views.ViewRef view_ref, |
| request<Presentation>? presentation_request); |
| }; |