| // Copyright 2019 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ASH_SHELF_SHELF_BUTTON_DELEGATE_H_ |
| #define ASH_SHELF_SHELF_BUTTON_DELEGATE_H_ |
| |
| #include "ui/events/event.h" |
| |
| namespace ui { |
| class Event; |
| } |
| |
| namespace views { |
| class Button; |
| class InkDrop; |
| } // namespace views |
| |
| namespace ash { |
| class ShelfButton; |
| |
| // ShelfButtonDelegate is an interface to allow ShelfButtons to notify their |
| // host view when they are pressed. |
| // TODO(mohsen): A better approach would be to return a value indicating the |
| // type of action performed such that the button can animate the ink drop. |
| // Currently, it is not possible because showing menu is synchronous and blocks |
| // the call. Fix this after menu is converted to asynchronous. |
| class ShelfButtonDelegate { |
| public: |
| class ScopedActiveInkDropCount { |
| public: |
| virtual ~ScopedActiveInkDropCount() = default; |
| }; |
| |
| ShelfButtonDelegate() {} |
| |
| ShelfButtonDelegate(const ShelfButtonDelegate&) = delete; |
| ShelfButtonDelegate& operator=(const ShelfButtonDelegate&) = delete; |
| |
| ~ShelfButtonDelegate() = default; |
| |
| // Used to let the host view redirect focus. |
| virtual void OnShelfButtonAboutToRequestFocusFromTabTraversal( |
| ShelfButton* button, |
| bool reverse) = 0; |
| |
| // Notify the host view that the button was pressed. |ink_drop| is used to do |
| // appropriate ink drop animation based on the action performed. |
| virtual void ButtonPressed(views::Button* sender, |
| const ui::Event& event, |
| views::InkDrop* ink_drop) = 0; |
| |
| // Called when the shelf button handles the accessible action with type of |
| // kScrollToMakeVisible. |button| is the view receiving the accessibility |
| // focus. |
| virtual void HandleAccessibleActionScrollToMakeVisible(ShelfButton* button) {} |
| |
| // Returns a scoped count that indicates whether |button| has an active ink |
| // drop. |button| calls this to get the scoped count when its ink drop is |
| // activated. It holds on to the scoped count until the ink drop is no longer |
| // active. |
| virtual std::unique_ptr<ScopedActiveInkDropCount> |
| CreateScopedActiveInkDropCount(const ShelfButton* button); |
| |
| // Notifies the host view that one button will be removed. |
| virtual void OnButtonWillBeRemoved() {} |
| |
| // Notifies the host view that the app button `button` is activated. |
| virtual void OnAppButtonActivated(const ShelfButton* button) {} |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_SHELF_SHELF_BUTTON_DELEGATE_H_ |