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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_OBSERVER_H_
#define UI_KEYBOARD_KEYBOARD_CONTROLLER_OBSERVER_H_
#include "ui/keyboard/keyboard_controller.h"
#include "ui/keyboard/keyboard_export.h"
namespace gfx {
class Rect;
}
namespace keyboard {
// Describes the various attributes of the keyboard's appearance and usability.
struct KeyboardStateDescriptor {
bool is_available;
bool is_locked;
gfx::Rect visual_bounds;
gfx::Rect occluded_bounds;
gfx::Rect displaced_bounds;
};
// Observers to the KeyboardController are notified of significant events that
// occur with the keyboard, such as the bounds or visiility changing.
class KEYBOARD_EXPORT KeyboardControllerObserver {
public:
virtual ~KeyboardControllerObserver() {}
// Called when the keyboard is shown or closed.
virtual void OnKeyboardAvailabilityChanged(const bool is_available) {}
// Called when the keyboard bounds are changing.
virtual void OnKeyboardVisibleBoundsChanged(const gfx::Rect& new_bounds) {}
// Called when the keyboard bounds have changed in a way that should affect
// the usable region of the workspace.
virtual void OnKeyboardWorkspaceOccludedBoundsChanged(
const gfx::Rect& new_bounds) {}
// Called when the keyboard bounds have changed in a way that affects how the
// workspace should change to not take up the screen space occupied by the
// keyboard.
virtual void OnKeyboardWorkspaceDisplacingBoundsChanged(
const gfx::Rect& new_bounds){};
// Redundant with other various notification methods. Use this if the state of
// multiple properties need to be conveyed simultaneously to observer
// implementations without the need to track multiple stateful properties.
virtual void OnKeyboardAppearanceChanged(
const KeyboardStateDescriptor& state){};
// Called when the keyboard was closed.
virtual void OnKeyboardClosed(){};
// Called when the keyboard has been hidden and the hiding animation finished
// successfully. This is same as |state| == HIDDEN on OnStateChanged.
virtual void OnKeyboardHidden() {}
// Called when the state changed.
virtual void OnStateChanged(const KeyboardControllerState state) {}
// Called when the virtual keyboard IME config changed.
virtual void OnKeyboardConfigChanged() {}
};
} // namespace keyboard
#endif // UI_KEYBOARD_KEYBOARD_CONTROLLER_OBSERVER_H_
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