Initial commit

arm9/source/DialogPresenter.h

@@ -0,0 +1,76 @@
+#pragma once
+#include <memory>
+#include "animation/Animator.h"
+#include "gui/views/DialogView.h"
+
+class StackVramManager;
+class FocusManager;
+
+/// @brief Class for displaying dialogs.
+class DialogPresenter
+{
+public:
+    DialogPresenter(FocusManager* focusManager, StackVramManager* vramManager);
+
+    /// @brief Requests to show the given dialog.
+    /// @param dialog The dialog to show.
+    void ShowDialog(std::unique_ptr<DialogView> dialog);
+
+    /// @brief Closes the current dialog.
+    void CloseDialog();
+
+    /// @brief Updates the dialog presenter.
+    void Update();
+
+    /// @brief Applies the clip area of the currently displayed dialog,
+    ///        or does nothing if no dialog is being shown.
+    /// @param graphicsContext The graphics context to apply to.
+    void ApplyClipArea(GraphicsContext& graphicsContext) const;
+
+    /// @brief If a dialog is currently being shown, draws the dialog.
+    /// @param graphicsContext The graphics context to use.
+    void Draw(GraphicsContext& graphicsContext)
+    {
+        if (_currentDialog)
+            _currentDialog->Draw(graphicsContext);
+    }
+
+    /// @brief Performs vblank processes for the displayed dialog.
+    void VBlank();
+
+    /// @brief Initializes vram that is needed for showing dialogs.
+    void InitVram();
+
+    /// @brief Clears the focus that was stored when a dialog was opened.
+    void ClearOldFocus()
+    {
+        _oldFocus = nullptr;
+    }
+
+    /// @brief Gets the focus that was stored when a dialog was opened.
+    /// @return The view that was focused when the current dialog was opened.
+    constexpr View* GetOldFocus() const
+    {
+        return _oldFocus;
+    }
+
+private:
+    enum class State
+    {
+        Idle,
+        BottomSheetVisible,
+        BottomSheetClosing
+    };
+
+    FocusManager* _focusManager;
+    StackVramManager* _vramManager;
+    u32 _baseVramState;
+    std::unique_ptr<DialogView> _currentDialog;
+    std::unique_ptr<DialogView> _nextDialog;
+    bool _initVram = false;
+    View* _oldFocus = nullptr;
+    Animator<int> _scrimAnimator;
+    Animator<int> _yAnimator;
+    State _curState = State::Idle;
+    State _newState = State::Idle;
+};