Initial commit

arm9/source/gui/views/RecyclerView.h

@@ -0,0 +1,112 @@
+#pragma once
+#include <memory>
+#include "View.h"
+#include "RecyclerAdapter.h"
+#include "gui/FocusManager.h"
+#include "animation/Animator.h"
+#include "RecyclerViewBase.h"
+
+class RecyclerView : public RecyclerViewBase
+{
+public:
+    enum class Mode
+    {
+        /// @brief A single row that grows horizontally.
+        HorizontalList,
+        /// @brief A multi-row grid that grows horizontally.
+        HorizontalGrid,
+        /// @brief A single column that grows vertically.
+        VerticalList,
+        /// @brief A multi-column grid that grows vertically.
+        VerticalGrid
+    };
+
+    RecyclerView(int x, int y, int width, int height, Mode mode);
+    ~RecyclerView();
+
+    void SetAdapter(const RecyclerAdapter* adapter, int initialSelectedIndex = 0) override;
+    void InitVram(const VramContext& vramContext) override;
+    void Update() override;
+    void Draw(GraphicsContext& graphicsContext) override;
+    void VBlank() override;
+
+    Rectangle GetBounds() const override
+    {
+        return Rectangle(_position, _width, _height);
+    }
+
+    View* MoveFocus(View* currentFocus, FocusMoveDirection direction, View* source) override;
+
+    bool HandleInput(const InputProvider& inputProvider, FocusManager& focusManager) override;
+
+    void Focus(FocusManager& focusManager) override
+    {
+        if (_selectedItem)
+            focusManager.Focus(_selectedItem->view);
+        else
+            focusManager.Focus(this);
+    }
+
+    int GetSelectedItem() const override
+    {
+        return _selectedItem ? _selectedItem->itemIdx : -1;
+    }
+
+    constexpr Mode GetMode() const { return _mode; }
+
+    void SetPadding(int x, int y)
+    {
+        _xPadding = x;
+        _yPadding = y;
+    }
+
+    void SetItemSpacing(int x, int y)
+    {
+        _xSpacing = x;
+        _ySpacing = y;
+    }
+
+private:
+    struct ViewPoolEntry
+    {
+        View* view;
+        int itemIdx;
+    };
+
+    int _width;
+    int _height;
+    Mode _mode;
+    int _rows;
+    int _columns;
+    std::unique_ptr<ViewPoolEntry[]> _viewPool;
+    u32 _viewPoolFreeCount;
+    u32 _viewPoolTotalCount;
+    int _xOffset;
+    int _yOffset;
+    int _xPadding;
+    int _yPadding;
+    int _xSpacing;
+    int _ySpacing;
+    int _itemWidth;
+    int _itemHeight;
+    u32 _itemCount;
+    ViewPoolEntry* _selectedItem;
+    int _curRangeStart;
+    int _curRangeLength;
+    Animator<int> _scrollOffsetAnimator;
+
+    void UpdatePosition(ViewPoolEntry& viewPoolEntry);
+    ViewPoolEntry* GetViewPoolEntryByItemIndex(int itemIdx);
+    void BindRange(int start, int end);
+    ViewPoolEntry* BindViewPoolEntry(int itemIdx);
+    void ReleaseRange(int start, int end);
+    void ReleaseViewPoolEntry(int itemIdx);
+    void SetSelectedItem(int itemIdx);
+    int GetMaxScrollOffset();
+    void SetScrollOffset(int offset, bool animate);
+    void EnsureVisible(int itemIdx, bool animate);
+    Point GetItemPosition(int itemIdx);
+
+    View* MoveFocusHorizontal(View* currentFocus, FocusMoveDirection direction, View* source);
+    View* MoveFocusVertical(View* currentFocus, FocusMoveDirection direction, View* source);
+};