pico-launcher/arm9/source/gui/FocusManager.h

#pragma once

class View;
class InputProvider;

/// @brief Class for managing focus.
class FocusManager
{
public:
    /// @brief Focuses the given view.
    /// @param newFocus The view to focus.
    void Focus(View* newFocus);

    /// @brief Clears the current focus.
    void Unfocus();

    /// @brief Updates the focus using the given input provider.
    /// @param inputProvider The input provider to use.
    void Update(const InputProvider& inputProvider);

    /// @brief Gets the currently focused view.
    /// @return A pointer to the view that is currently focused, or null if none.
    constexpr View* GetCurrentFocus() const { return _currentFocus; }

    /// @brief Checks whether the current focus lies inside the given view.
    /// @param view The view to check for.
    /// @return True if the current focus lies inside the given view, or false otherwise.
    bool IsFocusInside(const View* view) const;

private:
    View* _currentFocus = nullptr;
};