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// 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 UI_VIEWS_CONTROLS_BUTTON_BUTTON_CONTROLLER_H_
#define UI_VIEWS_CONTROLS_BUTTON_BUTTON_CONTROLLER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "ui/events/event.h"
#include "ui/views/controls/button/button.h"
namespace views {
// Handles logic not related to the visual aspects of a Button such as event
// handling and state changes.
class VIEWS_EXPORT ButtonController {
public:
ButtonController(Button* button,
std::unique_ptr<ButtonControllerDelegate> delegate);
ButtonController(const ButtonController&) = delete;
ButtonController& operator=(const ButtonController&) = delete;
virtual ~ButtonController();
// An enum describing the events on which a button should notify its listener.
enum class NotifyAction {
kOnPress,
kOnRelease,
};
Button* button() { return button_; }
// Sets the event on which the button's listener should be notified.
void set_notify_action(NotifyAction notify_action) {
notify_action_ = notify_action;
}
NotifyAction notify_action() const { return notify_action_; }
// Methods that parallel View::On<Event> handlers:
virtual bool OnMousePressed(const ui::MouseEvent& event);
virtual void OnMouseReleased(const ui::MouseEvent& event);
virtual void OnMouseMoved(const ui::MouseEvent& event);
virtual void OnMouseEntered(const ui::MouseEvent& event);
virtual void OnMouseExited(const ui::MouseEvent& event);
virtual bool OnKeyPressed(const ui::KeyEvent& event);
virtual bool OnKeyReleased(const ui::KeyEvent& event);
virtual void OnGestureEvent(ui::GestureEvent* event);
// Cause the button to notify the listener that a click occurred.
virtual void NotifyClick();
virtual void UpdateButtonAccessibleDefaultActionVerb();
// Methods that parallel respective methods in Button:
virtual bool IsTriggerableEvent(const ui::Event& event);
protected:
ButtonControllerDelegate* delegate() {
return button_controller_delegate_.get();
}
private:
const raw_ptr<Button> button_;
// TODO(cyan): Remove |button_| and access everything via the delegate.
std::unique_ptr<ButtonControllerDelegate> button_controller_delegate_;
// The event on which the button's listener should be notified.
NotifyAction notify_action_ = NotifyAction::kOnRelease;
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_BUTTON_BUTTON_CONTROLLER_H_
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