Added a GridComponent skeleton.

es-app/src/views/SystemView.h

@@ -21,6 +21,7 @@
 #include "components/TextComponent.h"
 #include "components/VideoFFmpegComponent.h"
 #include "components/primary/CarouselComponent.h"
+#include "components/primary/GridComponent.h"
 #include "components/primary/TextListComponent.h"
 #include "resources/Font.h"
 

es-core/CMakeLists.txt

@@ -33,6 +33,7 @@ set(CORE_HEADERS
 
     # Primary GUI components
     ${CMAKE_CURRENT_SOURCE_DIR}/src/components/primary/CarouselComponent.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/components/primary/GridComponent.h
     ${CMAKE_CURRENT_SOURCE_DIR}/src/components/primary/PrimaryComponent.h
     ${CMAKE_CURRENT_SOURCE_DIR}/src/components/primary/TextListComponent.h
 

es-core/src/components/primary/GridComponent.h

@@ -0,0 +1,70 @@
+//  SPDX-License-Identifier: MIT
+//
+//  EmulationStation Desktop Edition
+//  GridComponent.h
+//
+//  Grid, usable in both the system and gamelist views.
+//
+
+#ifndef ES_CORE_COMPONENTS_GRID_COMPONENT_H
+#define ES_CORE_COMPONENTS_GRID_COMPONENT_H
+
+#include "components/IList.h"
+#include "components/primary/PrimaryComponent.h"
+
+struct GridEntry {
+    std::shared_ptr<GuiComponent> item;
+    std::string itemPath;
+    std::string defaultItemPath;
+};
+
+template <typename T>
+class GridComponent : public PrimaryComponent<T>, protected IList<GridEntry, T>
+{
+    using List = IList<GridEntry, T>;
+
+protected:
+    using List::mCursor;
+    using List::mEntries;
+
+public:
+    GridComponent();
+
+    void setCancelTransitionsCallback(const std::function<void()>& func) override
+    {
+        mCancelTransitionsCallback = func;
+    }
+    void setCursorChangedCallback(const std::function<void(CursorState state)>& func) override
+    {
+        mCursorChangedCallback = func;
+    }
+    int getCursor() override { return mCursor; }
+    const size_t getNumEntries() override { return mEntries.size(); }
+    const bool getFadeAbovePrimary() const override { return mFadeAbovePrimary; }
+    const LetterCase getLetterCase() const override { return mLetterCase; }
+    virtual const LetterCase getLetterCaseCollections() const = 0;
+    virtual const LetterCase getLetterCaseGroupedCollections() const = 0;
+
+private:
+    Renderer* mRenderer;
+    std::function<void()> mCancelTransitionsCallback;
+    std::function<void(CursorState state)> mCursorChangedCallback;
+
+    bool mFadeAbovePrimary;
+    LetterCase mLetterCase;
+    LetterCase mLetterCaseCollections;
+    LetterCase mLetterCaseGroupedCollections;
+};
+
+template <typename T>
+GridComponent<T>::GridComponent()
+    : IList<GridEntry, T> {}
+    , mRenderer {Renderer::getInstance()}
+    , mFadeAbovePrimary {false}
+    , mLetterCase {LetterCase::NONE}
+    , mLetterCaseCollections {LetterCase::NONE}
+    , mLetterCaseGroupedCollections {LetterCase::NONE}
+{
+}
+
+#endif // ES_CORE_COMPONENTS_GRID_COMPONENT_H