[nostalgia/core/studio] Add palette picker combo box

src/nostalgia/core/studio/tilesheeteditormodel.cpp

@@ -57,6 +57,7 @@ enum class CommandId {
 	RmSubSheet  = 3,
 	UpdateSubSheet  = 4,
 	Paste = 5,
+	PaletteChange = 6,
 };
 
 constexpr bool operator==(CommandId c, int i) noexcept {
@@ -322,6 +323,34 @@ class UpdateSubSheetCommand: public studio::UndoCommand {
 
 };
 
+class PaletteChangeCommand: public studio::UndoCommand {
+	private:
+		TileSheet *m_img = nullptr;
+		ox::FileAddress m_oldPalette;
+		ox::FileAddress m_newPalette;
+
+	public:
+		constexpr PaletteChangeCommand(TileSheet *img, const ox::String &newPalette) noexcept {
+			m_img = img;
+			m_oldPalette = m_img->defaultPalette;
+			m_newPalette = newPalette;
+		}
+
+		void redo() noexcept final {
+			m_img->defaultPalette = m_newPalette;
+		}
+
+		void undo() noexcept final {
+			m_img->defaultPalette = m_oldPalette;
+		}
+
+		[[nodiscard]]
+		int commandId() const noexcept final {
+			return static_cast<int>(CommandId::PaletteChange);
+		}
+
+};
+
 
 TileSheetEditorModel::TileSheetEditorModel(Context *ctx, const ox::String &path) {
 	m_ctx = ctx;
@@ -378,6 +407,15 @@ void TileSheetEditorModel::paste() {
 	pushCommand(new PasteCommand(&m_img, m_activeSubsSheetIdx, pt1, pt2, *cb));
 }
 
+const ox::FileAddress &TileSheetEditorModel::palPath() const noexcept {
+	return m_img.defaultPalette;
+}
+
+ox::Error TileSheetEditorModel::setPalette(const ox::String &path) noexcept {
+	pushCommand(new PaletteChangeCommand(&m_img, path));
+	return OxError(0);
+}
+
 void TileSheetEditorModel::drawCommand(const geo::Point &pt, std::size_t palIdx) noexcept {
 	const auto &activeSubSheet = m_img.getSubSheet(m_activeSubsSheetIdx);
 	if (pt.x >= activeSubSheet.columns * TileWidth || pt.y >= activeSubSheet.rows * TileHeight) {
@@ -480,6 +518,9 @@ ox::Error TileSheetEditorModel::markUpdated(int cmdId) noexcept {
 		case CommandId::Paste:
 		case CommandId::UpdateSubSheet:
 			break;
+		case CommandId::PaletteChange:
+			oxReturnError(readObj<Palette>(m_ctx, m_img.defaultPalette.getPath().value).moveTo(&m_pal));
+			break;
 	}
 	return OxError(0);
 }