feat(ui): DatasetChartView 散点/等值面/异常叠加(QGraphicsView)

src/app/CMakeLists.txt

@@ -26,6 +26,7 @@ add_executable(geopro_desktop WIN32
   panels/ObjectTreePanel.cpp
   panels/DynamicFormView.cpp
   panels/ObjectExceptionPanel.cpp
+  panels/chart/DatasetChartView.cpp
   CentralScene.cpp
   ProjectListDialog.cpp
   SettingsDialog.cpp)

src/app/panels/chart/DatasetChartView.cpp

@@ -0,0 +1,216 @@
+#include "panels/chart/DatasetChartView.hpp"
+#include <QGraphicsScene>
+#include <QGraphicsPathItem>
+#include <QGraphicsRectItem>
+#include <QPainterPath>
+#include <QPen>
+#include <QBrush>
+#include <QColor>
+#include <QWheelEvent>
+#include <QPainter>
+#include <QFontMetrics>
+namespace geopro::app {
+using geopro::core::Rgba;
+
+static QColor toQ(const Rgba& c) { return QColor(c.r, c.g, c.b, c.a); }
+
+DatasetChartView::DatasetChartView(QWidget* parent)
+    : QGraphicsView(parent), scene_(new QGraphicsScene(this)) {
+    setScene(scene_);
+    setRenderHint(QPainter::Antialiasing, true);
+    setDragMode(QGraphicsView::ScrollHandDrag);
+    // 场景 y 向上为正：用 y 翻转的变换（QGraphicsView 默认 y 向下）。
+    scale(1, -1);
+}
+
+void DatasetChartView::clearChart() {
+    scene_->clear(); anomalyItems_.clear();
+}
+
+void DatasetChartView::showScatter(const geopro::core::ScatterField& f, const geopro::core::ColorScale& cs) {
+    clearChart();
+    const double sz = 0.6;  // 方块边长（数据单位，近似 web 方点）
+    for (size_t i = 0; i < f.v.size(); ++i) {
+        auto* r = scene_->addRect(f.x[i] - sz / 2, f.y[i] - sz / 2, sz, sz,
+                                  QPen(Qt::white, 0), QBrush(toQ(cs.colorAt(f.v[i]))));
+        r->setPen(QPen(Qt::white, 0));  // 白描边
+    }
+    rebuildAnomalyItems();
+    setLegend(cs);
+    viewport()->update();
+    fitInView(scene_->itemsBoundingRect(), Qt::KeepAspectRatio);  // x:y 等比
+}
+
+void DatasetChartView::showContour(const geopro::core::Grid& g, const geopro::core::ColorScale& cs,
+                                   const geopro::render::ContourOptions& opt) {
+    clearChart();
+    const auto r = geopro::render::buildContourBands(g, cs, opt);
+    for (const auto& b : r.bands) {
+        QPainterPath path; if (b.ring.empty()) continue;
+        path.moveTo(b.ring[0].x, b.ring[0].y);
+        for (size_t k = 1; k < b.ring.size(); ++k) path.lineTo(b.ring[k].x, b.ring[k].y);
+        path.closeSubpath();
+        auto* it = scene_->addPath(path, QPen(Qt::NoPen), QBrush(toQ(b.color)));
+        it->setZValue(0);
+    }
+    if (showContourLines_)
+        for (const auto& l : r.lines) {
+            if (l.pts.empty()) continue;
+            QPainterPath path; path.moveTo(l.pts[0].x, l.pts[0].y);
+            for (size_t k = 1; k < l.pts.size(); ++k) path.lineTo(l.pts[k].x, l.pts[k].y);
+            auto* it = scene_->addPath(path, QPen(QColor(0, 0, 0), 0));
+            it->setZValue(1);
+        }
+    rebuildAnomalyItems();
+    setLegend(cs);
+    viewport()->update();
+    fitInView(scene_->itemsBoundingRect(), Qt::IgnoreAspectRatio);  // 剖面 X/Y 各自铺满
+}
+
+void DatasetChartView::setAnomalies(const std::vector<geopro::core::Anomaly>& list) {
+    anomalies_ = list; rebuildAnomalyItems();
+}
+void DatasetChartView::setHiddenAnomalies(const std::set<int>& hidden) { hidden_ = hidden; rebuildAnomalyItems(); }
+void DatasetChartView::setShowAnomalies(bool on) { showAnomalies_ = on; rebuildAnomalyItems(); }
+void DatasetChartView::setShowContourLines(bool on) { showContourLines_ = on; }
+
+void DatasetChartView::rebuildAnomalyItems() {
+    for (auto* it : anomalyItems_) { scene_->removeItem(it); delete it; }
+    anomalyItems_.clear();
+    if (!showAnomalies_) return;
+    for (int i = 0; i < static_cast<int>(anomalies_.size()); ++i) {
+        if (hidden_.count(i)) continue;
+        const auto& a = anomalies_[i];
+        if (a.localPts.size() < 2) continue;
+        QPainterPath path; path.moveTo(a.localPts[0].x, a.localPts[0].y);
+        for (size_t k = 1; k < a.localPts.size(); ++k) path.lineTo(a.localPts[k].x, a.localPts[k].y);
+        if (static_cast<int>(a.markType) == 3) path.closeSubpath();
+        QPen pen(QColor(QString::fromStdString(a.lineColor)), 0);
+        if (a.dashed) pen.setStyle(Qt::DashLine);
+        auto* it = scene_->addPath(path, pen);
+        it->setZValue(2);
+        anomalyItems_.push_back(it);
+    }
+}
+
+void DatasetChartView::wheelEvent(QWheelEvent* e) {
+    const double f = e->angleDelta().y() > 0 ? 1.15 : 1 / 1.15;
+    scale(f, f);
+}
+
+// Task 3.2：坐标轴 overlay + 底部色阶图例。
+// drawForeground 在每次 repaint 时调用（缩放/平移后自动重绘），无需手动更新。
+// 轴线"钉"在 viewport 左/下边：以 viewport()->rect() 为参考，
+// 用 mapToScene / mapFromScene 把场景范围映射到像素位置。
+void DatasetChartView::drawForeground(QPainter* p, const QRectF& /*rect*/) {
+    if (legendScale_.empty()) return;
+
+    p->save();
+    // 重置变换，后续全用视口像素坐标绘制
+    p->resetTransform();
+
+    const QRect vr = viewport()->rect();
+    const int W = vr.width();
+    const int H = vr.height();
+
+    // ── 色阶图例（底部）────────────────────────────────
+    const int legendH = 16;             // 色条高度（px）
+    const int legendMarginB = 20;       // 底部文字留白
+    const int legendMarginL = 50;       // 左侧轴标签留白
+    const int legendMarginR = 10;
+    const int legendY = H - legendMarginB - legendH;
+    const int legendW = W - legendMarginL - legendMarginR;
+
+    const std::vector<double> stops = legendScale_.stopValues();
+    if (stops.size() >= 2 && legendW > 0) {
+        const int nSeg = static_cast<int>(stops.size()) - 1;
+        const double segW = static_cast<double>(legendW) / nSeg;
+        for (int s = 0; s < nSeg; ++s) {
+            // 取该段中点值的颜色（与 web 阶梯色一致）
+            const double midVal = (stops[s] + stops[s + 1]) * 0.5;
+            const QColor c = toQ(legendScale_.colorAt(midVal));
+            const int x0 = legendMarginL + static_cast<int>(s * segW);
+            const int x1 = legendMarginL + static_cast<int>((s + 1) * segW);
+            p->fillRect(QRect(x0, legendY, x1 - x0, legendH), c);
+        }
+        // 边框
+        p->setPen(QPen(QColor(80, 80, 80), 1));
+        p->drawRect(QRect(legendMarginL, legendY, legendW, legendH));
+
+        // 分段值文字（在每个分割点下方）
+        p->setPen(Qt::black);
+        QFont font = p->font();
+        font.setPixelSize(10);
+        p->setFont(font);
+        for (int s = 0; s <= nSeg; ++s) {
+            const int xTick = legendMarginL + static_cast<int>(s * segW);
+            const QString label = QString::number(stops[s], 'g', 4);
+            QRect textR(xTick - 20, legendY + legendH + 2, 40, 14);
+            p->drawText(textR, Qt::AlignCenter, label);
+        }
+    }
+
+    // ── 坐标轴（左/下边钉住视口）────────────────────────
+    // 把视口四个角映射到场景，得到场景可见范围
+    const QPointF sceneTL = mapToScene(vr.topLeft());
+    const QPointF sceneBR = mapToScene(vr.bottomRight());
+
+    // 因为 y 轴翻转（scale(1,-1)），场景坐标 y 向上为正
+    // sceneTL 的 scene-y 可能大于 sceneBR 的 scene-y，需取 min/max
+    const double sceneXMin = qMin(sceneTL.x(), sceneBR.x());
+    const double sceneXMax = qMax(sceneTL.x(), sceneBR.x());
+    const double sceneYMin = qMin(sceneTL.y(), sceneBR.y());
+    const double sceneYMax = qMax(sceneTL.y(), sceneBR.y());
+
+    const int axisLeft = legendMarginL;        // 左轴 x 像素
+    const int axisBottom = legendY - 4;         // 下轴 y 像素（色阶条上方留 4px）
+
+    p->setPen(QPen(QColor(100, 100, 100), 1));
+
+    // 左侧轴线（竖）
+    p->drawLine(axisLeft, 4, axisLeft, axisBottom);
+    // 下轴线（横）
+    p->drawLine(axisLeft, axisBottom, W - legendMarginR, axisBottom);
+
+    // 刻度数（6~8 个）
+    const int nTick = 7;
+    QFont tickFont = p->font();
+    tickFont.setPixelSize(10);
+    p->setFont(tickFont);
+
+    // X 轴刻度（下轴）
+    const double xRange = sceneXMax - sceneXMin;
+    if (xRange > 0) {
+        for (int t = 0; t <= nTick; ++t) {
+            const double sx = sceneXMin + xRange * t / nTick;
+            const QPoint vp = mapFromScene(QPointF(sx, sceneYMin));  // 场景 → 视口像素
+            const int px = vp.x();
+            if (px < axisLeft || px > W - legendMarginR) continue;
+            p->setPen(QPen(QColor(100, 100, 100), 1));
+            p->drawLine(px, axisBottom, px, axisBottom + 4);
+            p->setPen(Qt::black);
+            const QString label = QString::number(sx, 'g', 4);
+            p->drawText(QRect(px - 20, axisBottom + 5, 40, 12), Qt::AlignCenter, label);
+        }
+    }
+
+    // Y 轴刻度（左轴）
+    const double yRange = sceneYMax - sceneYMin;
+    if (yRange > 0) {
+        for (int t = 0; t <= nTick; ++t) {
+            const double sy = sceneYMin + yRange * t / nTick;
+            const QPoint vp = mapFromScene(QPointF(sceneXMin, sy));
+            const int py = vp.y();
+            if (py < 4 || py > axisBottom) continue;
+            p->setPen(QPen(QColor(100, 100, 100), 1));
+            p->drawLine(axisLeft - 4, py, axisLeft, py);
+            p->setPen(Qt::black);
+            const QString label = QString::number(sy, 'g', 4);
+            p->drawText(QRect(0, py - 7, axisLeft - 5, 14), Qt::AlignRight | Qt::AlignVCenter, label);
+        }
+    }
+
+    p->restore();
+}
+
+}  // namespace geopro::app

src/app/panels/chart/DatasetChartView.hpp

@@ -0,0 +1,38 @@
+#pragma once
+#include <set>
+#include <vector>
+#include <QGraphicsView>
+#include "model/Field.hpp"
+#include "model/ColorScale.hpp"
+#include "model/Anomaly.hpp"
+#include "ContourBands.hpp"
+namespace geopro::app {
+
+// 平面图表视图：散点(原数据) / 等值面(网格) + 异常叠加 + 色阶图例。VTK 仅经 ContourBands 算几何。
+class DatasetChartView : public QGraphicsView {
+    Q_OBJECT
+public:
+    explicit DatasetChartView(QWidget* parent = nullptr);
+    void showScatter(const geopro::core::ScatterField& f, const geopro::core::ColorScale& cs);
+    void showContour(const geopro::core::Grid& g, const geopro::core::ColorScale& cs,
+                     const geopro::render::ContourOptions& opt);
+    void setAnomalies(const std::vector<geopro::core::Anomaly>& list);
+    void setHiddenAnomalies(const std::set<int>& hidden);  // 下标=list 序
+    void setShowAnomalies(bool on);
+    void setShowContourLines(bool on);
+    void clearChart();
+protected:
+    void wheelEvent(QWheelEvent* e) override;  // 滚轮缩放
+    void drawForeground(QPainter* p, const QRectF& rect) override;
+private:
+    void rebuildAnomalyItems();
+    void setLegend(const geopro::core::ColorScale& cs) { legendScale_ = cs; }
+    QGraphicsScene* scene_;
+    std::vector<geopro::core::Anomaly> anomalies_;
+    std::set<int> hidden_;
+    bool showAnomalies_ = true;
+    bool showContourLines_ = true;
+    std::vector<class QGraphicsItem*> anomalyItems_;
+    geopro::core::ColorScale legendScale_;
+};
+}  // namespace geopro::app