feat(app): 网格懒加载「加载中」遮罩(LoadingOverlay) 接 loadStarted/隐藏于就绪或失败

src/app/CMakeLists.txt

@@ -35,6 +35,7 @@ add_executable(geopro_desktop WIN32
   panels/chart/ContourPlotItem.cpp
   panels/chart/LivePanner.cpp
   panels/AnomalyTablePanel.cpp
+  panels/LoadingOverlay.cpp
   panels/DatasetDetailPage.cpp
   panels/DatasetDetailPanel.cpp
   CentralScene.cpp

src/app/main.cpp

@@ -520,8 +520,16 @@ void buildWorkbench(QMainWindow& window, geopro::data::LocalSampleRepository& re
         [detailPanel](const geopro::controller::DatasetDetailController::GridData& d) {
             detailPanel->setGridData(d);
         });
+    QObject::connect(
+        &detailCtrl, &geopro::controller::DatasetDetailController::loadStarted, detailPanel,
+        [detailPanel](const QString& dsId,
+                      geopro::controller::DatasetDetailController::LoadPhase phase) {
+            if (phase == geopro::controller::DatasetDetailController::LoadPhase::Grid)
+                detailPanel->setGridLoading(dsId, true);
+        });
     QObject::connect(&detailCtrl, &geopro::controller::DatasetDetailController::loadFailed, &window,
-                     [&window](const QString& dsId, const QString& msg) {
+                     [&window, detailPanel](const QString& dsId, const QString& msg) {
+                         detailPanel->setGridLoading(dsId, false);
                          window.statusBar()->showMessage(
                              QStringLiteral("数据集 %1 加载失败：%2").arg(dsId, msg), 5000);
                      });

src/app/panels/DatasetDetailPage.cpp

@@ -5,6 +5,7 @@
 
 #include "Glyphs.hpp"
 #include "PanelHeader.hpp"
+#include "panels/LoadingOverlay.hpp"
 #include "panels/chart/GridDataChartView.hpp"
 #include "panels/chart/RawDataChartView.hpp"
 
@@ -21,6 +22,7 @@ DatasetDetailPage::DatasetDetailPage(QWidget* parent) : QWidget(parent) {
 
     rawView_ = new RawDataChartView(this);
     gridView_ = new GridDataChartView(this);
+    gridOverlay_ = new LoadingOverlay(gridView_);  // 父为 gridView_，随其尺寸覆盖网格图区
 
     const QVector<PanelTab> tabs = {
         {Glyph::Detail,  QStringLiteral("原数据"),   rawView_,  false},
@@ -55,6 +57,11 @@ void DatasetDetailPage::setGridData(
         const geopro::controller::DatasetDetailController::GridData& d) {
     gridRequested_ = true;  // 已加载，切回网格页不再重复请求
     gridView_->setGridData(d.grid, d.gridScale, d.anomalies);
+    setGridLoading(false);  // 数据到达，隐藏遮罩
+}
+
+void DatasetDetailPage::setGridLoading(bool on) {
+    if (on) gridOverlay_->showOver(); else gridOverlay_->hide();
 }
 
 }  // namespace geopro::app

src/app/panels/DatasetDetailPage.hpp

@@ -6,6 +6,7 @@ namespace geopro::app {
 
 class RawDataChartView;
 class GridDataChartView;
+class LoadingOverlay;
 
 // 单个数据集详情页：下划线页签「原数据 / 网格数据」+ 右侧「导出」操作。
 // 内部分别由 RawDataChartView / GridDataChartView 实现各自三层布局。
@@ -16,6 +17,8 @@ public:
     void setData(const geopro::controller::DatasetDetailController::ChartData& d);
     // 网格数据到达（懒加载结果）→ 下发给 GridDataChartView 并标记已加载。
     void setGridData(const geopro::controller::DatasetDetailController::GridData& d);
+    // 网格懒加载进行中(true)/结束(false)时切换遮罩显隐。
+    void setGridLoading(bool on);
     QString dsId() const { return dsId_; }
 signals:
     // 「网格数据」页签首次激活且本页网格数据未加载 → 请求懒加载。
@@ -26,6 +29,7 @@ private:
     bool gridRequested_ = false;  // 已请求过（避免重复发信号）
     RawDataChartView* rawView_;
     GridDataChartView* gridView_;
+    LoadingOverlay* gridOverlay_;  // 网格懒加载期间覆盖 gridView_ 的遮罩
 };
 
 }  // namespace geopro::app

src/app/panels/DatasetDetailPanel.cpp

@@ -33,6 +33,9 @@ void DatasetDetailPanel::openOrUpdate(const geopro::controller::DatasetDetailCon
 void DatasetDetailPanel::setGridData(const geopro::controller::DatasetDetailController::GridData& d) {
     if (auto* p = pageFor(d.dsId)) p->setGridData(d);
 }
+void DatasetDetailPanel::setGridLoading(const QString& dsId, bool on) {
+    if (auto* p = pageFor(dsId)) p->setGridLoading(on);
+}
 void DatasetDetailPanel::focusDataset(const QString& dsId) {
     if (auto* p = pageFor(dsId)) setCurrentWidget(p);
 }

src/app/panels/DatasetDetailPanel.hpp

@@ -11,6 +11,7 @@ public:
     explicit DatasetDetailPanel(QWidget* parent = nullptr);
     void openOrUpdate(const geopro::controller::DatasetDetailController::ChartData& d); // 双击/数据到达
     void setGridData(const geopro::controller::DatasetDetailController::GridData& d);   // 网格数据懒加载到达
+    void setGridLoading(const QString& dsId, bool on);  // 网格懒加载进行中/结束 → 转发给对应页
     void focusDataset(const QString& dsId);  // 单击聚焦已开页
 signals:
     void activeDatasetChanged(const QString& dsId);            // 反向联动数据集列表

src/app/panels/LoadingOverlay.cpp

@@ -0,0 +1,33 @@
+#include "panels/LoadingOverlay.hpp"
+#include <QEvent>
+#include <QLabel>
+#include <QResizeEvent>
+#include <QVBoxLayout>
+
+namespace geopro::app {
+
+LoadingOverlay::LoadingOverlay(QWidget* parent) : QWidget(parent), label_(new QLabel(this)) {
+    setAttribute(Qt::WA_StyledBackground, true);
+    setStyleSheet(QStringLiteral("background: rgba(255,255,255,160);"));
+    label_->setText(QStringLiteral("加载中…"));
+    label_->setAlignment(Qt::AlignCenter);
+    auto* lay = new QVBoxLayout(this);
+    lay->addWidget(label_);
+    if (parent) parent->installEventFilter(this);
+    hide();
+}
+
+void LoadingOverlay::showOver() {
+    if (parentWidget()) setGeometry(parentWidget()->rect());
+    raise();
+    show();
+}
+
+bool LoadingOverlay::eventFilter(QObject* obj, QEvent* ev) {
+    if (obj == parentWidget() && ev->type() == QEvent::Resize && isVisible()) {
+        setGeometry(parentWidget()->rect());
+    }
+    return QWidget::eventFilter(obj, ev);
+}
+
+}  // namespace geopro::app

src/app/panels/LoadingOverlay.hpp

@@ -0,0 +1,18 @@
+#pragma once
+#include <QWidget>
+class QLabel;
+namespace geopro::app {
+
+// 半透明「加载中…」遮罩。贴在目标视图上层，showOver()/hide() 切换，几何随父 resize 跟随。
+class LoadingOverlay : public QWidget {
+    Q_OBJECT
+public:
+    explicit LoadingOverlay(QWidget* parent);
+    void showOver();   // 铺满父尺寸、置顶、显示
+protected:
+    bool eventFilter(QObject* obj, QEvent* ev) override;  // 跟随父 resize
+private:
+    QLabel* label_;
+};
+
+}  // namespace geopro::app