src/app/CMakeLists.txt

@@ -60,7 +60,8 @@ add_executable(geopro_desktop WIN32
   ImportDatasetDialog.cpp
   ExportDatasetDialog.cpp
   SettingsDialog.cpp
-  Logging.cpp)
+  Logging.cpp
+  DatasetDimension.cpp)
 
 target_include_directories(geopro_desktop PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
 # QtKeychain 经 FetchContent 接入，头文件不随 target 传播，显式加源/构建目录（含生成的 export 头）。

src/app/DatasetDimension.cpp

@@ -0,0 +1,31 @@
+#include "DatasetDimension.hpp"
+
+namespace geopro::app {
+
+namespace {
+// 与 LocalSample3dRepository::dimensionOf 同一映射（spec §6.1）。
+enum class Dim { D3, D2, Analysis, Other };
+Dim dimOf(const std::string& c) {
+    if (c == "dd_voxel" || c == "dd_Structual3D" || c == "dd_Property3D" ||
+        c == "dd_section" || c == "dd_inversion_data")
+        return Dim::D3;
+    if (c == "dd_slice") return Dim::Analysis;
+    if (c == "dd_trajectory_data") return Dim::D2;
+    return Dim::Other;
+}
+}  // namespace
+
+DimBuckets splitByDimension(const std::vector<geopro::data::DsRow>& rows) {
+    DimBuckets b;
+    for (const auto& r : rows) {
+        switch (dimOf(r.ddCode)) {
+            case Dim::D3: b.dim3D.push_back(r); break;
+            case Dim::D2: b.dim2D.push_back(r); break;
+            case Dim::Analysis: b.analysis.push_back(r); break;
+            case Dim::Other: break;
+        }
+    }
+    return b;
+}
+
+}  // namespace geopro::app

src/app/DatasetDimension.hpp

@@ -0,0 +1,17 @@
+#pragma once
+#include <vector>
+#include "repo/RepoTypes.hpp"
+
+namespace geopro::app {
+
+struct DimBuckets {
+    std::vector<geopro::data::DsRow> dim3D;
+    std::vector<geopro::data::DsRow> dim2D;
+    std::vector<geopro::data::DsRow> analysis;
+};
+
+// 按 ddCode 把 ds 分流到 三维数据集 / 二维数据集 / 三维分析 三栏。
+// Other 维度不入任何栏（保留原顺序）。
+DimBuckets splitByDimension(const std::vector<geopro::data::DsRow>& rows);
+
+}  // namespace geopro::app

tests/CMakeLists.txt

@@ -122,6 +122,11 @@ target_sources(geopro_tests PRIVATE
 )
 # 散点 hover 文本格式（inline 纯函数，无需链 qwt/实例化 ScatterHoverTip）。
 target_sources(geopro_tests PRIVATE app/test_scatter_hover.cpp)
+# 维度过滤纯函数（splitByDimension: ddCode -> 三维/二维/分析三栏，无 Qt/VTK 依赖）。
+target_sources(geopro_tests PRIVATE
+    app/test_dataset_dimension.cpp
+    ${CMAKE_SOURCE_DIR}/src/app/DatasetDimension.cpp
+)
 
 # controller 层：DatasetDetailController 编排集成测试（QSignalSpy 验证 datasetOpened/tabReady/loadFailed）。
 find_package(Qt6 COMPONENTS Test REQUIRED)

tests/app/test_dataset_dimension.cpp

@@ -0,0 +1,36 @@
+#include <gtest/gtest.h>
+#include "DatasetDimension.hpp"
+#include "repo/RepoTypes.hpp"
+
+using geopro::data::DsRow;
+using geopro::app::splitByDimension;
+using geopro::app::DimBuckets;
+
+static DsRow row(const char* id, const char* ddCode) {
+    DsRow r; r.id = id; r.ddCode = ddCode; return r;
+}
+
+TEST(DatasetDimension, SplitsByDdCode) {
+    std::vector<DsRow> in{
+        row("a", "dd_section"),          // 3D
+        row("b", "dd_voxel"),            // 3D
+        row("c", "dd_trajectory_data"),  // 2D
+        row("d", "dd_slice"),            // Analysis
+        row("e", "dd_unknownxyz"),       // Other -> not in any bucket
+    };
+    DimBuckets b = splitByDimension(in);
+    ASSERT_EQ(b.dim3D.size(), 2u);
+    EXPECT_EQ(b.dim3D[0].id, "a");
+    EXPECT_EQ(b.dim3D[1].id, "b");
+    ASSERT_EQ(b.dim2D.size(), 1u);
+    EXPECT_EQ(b.dim2D[0].id, "c");
+    ASSERT_EQ(b.analysis.size(), 1u);
+    EXPECT_EQ(b.analysis[0].id, "d");
+}
+
+TEST(DatasetDimension, EmptyInput) {
+    DimBuckets b = splitByDimension({});
+    EXPECT_TRUE(b.dim3D.empty());
+    EXPECT_TRUE(b.dim2D.empty());
+    EXPECT_TRUE(b.analysis.empty());
+}