Initial commit

arm9/source/gui/FocusManager.h

@@ -0,0 +1,32 @@
+#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;
+};