fix

1、基于新框架实现点击显示光谱;
2、影像拉伸显示优化；
3、右键菜单新增：移除所有栅格图层；

HPPA/RasterDataProvider.cpp

@@ -1,6 +1,9 @@
 #include "RasterDataProvider.h"
 #include <QString>
 #include <QDebug>
+#include <QFile>
+#include <QFileInfo>
+#include <QRegularExpression>
 
 #if HPPA_HAVE_GDAL
 #include <gdal_priv.h>
@@ -79,27 +82,126 @@ int RasterDataProvider::height() const
 #endif
 }
 
+bool RasterDataProvider::isValidPixel(int x, int y) const
+{
+    const int w = width();
+    const int h = height();
+    return x >= 0 && y >= 0 && x < w && y < h;
+}
+
+std::vector<double> RasterDataProvider::parseEnviHdrWavelengths() const
+{
+    std::vector<double> res;
+
+    QFileInfo fi(m_uri);
+    QString hdrPath = fi.path() + "/" + fi.completeBaseName() + ".hdr";
+    QFile hdr(hdrPath);
+    if (!hdr.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        return res;
+    }
+
+    QString text = QString::fromLocal8Bit(hdr.readAll());
+    hdr.close();
+
+    QRegularExpression rx("wavelength\\s*=\\s*\\{([^}]*)\\}", QRegularExpression::CaseInsensitiveOption | QRegularExpression::DotMatchesEverythingOption);
+    QRegularExpressionMatch m = rx.match(text);
+    if (!m.hasMatch()) {
+        return res;
+    }
+
+    const QString body = m.captured(1);
+    const QStringList parts = body.split(',', QString::SkipEmptyParts);
+    res.reserve(parts.size());
+    for (const QString& p : parts) {
+        bool ok = false;
+        double v = p.trimmed().toDouble(&ok);
+        if (ok) {
+            res.push_back(v);
+        }
+    }
+
+    return res;
+}
+
 std::vector<double> RasterDataProvider::bandWavelengths() const
 {
     std::vector<double> res;
 #if HPPA_HAVE_GDAL
     if (!m_dataset) return res;
+
+    // 1) Try ENVI dataset-level metadata first: wavelength = { ... }
+    const char* dsWave = m_dataset->GetMetadataItem("wavelength", "ENVI");
+    if (!dsWave) dsWave = m_dataset->GetMetadataItem("Wavelength", "ENVI");
+    if (dsWave) {
+        QString dsWaveStr = QString::fromLocal8Bit(dsWave);
+        dsWaveStr.remove('{').remove('}');
+        const QStringList parts = dsWaveStr.split(',', QString::SkipEmptyParts);
+        res.reserve(parts.size());
+        for (const QString& p : parts) {
+            bool ok = false;
+            double v = p.trimmed().toDouble(&ok);
+            if (ok) res.push_back(v);
+        }
+        if (!res.empty()) return res;
+    }
+
+    // 2) Try per-band metadata
     for (int i = 1; i <= m_dataset->GetRasterCount(); ++i) {
         GDALRasterBand* band = m_dataset->GetRasterBand(i);
         if (!band) continue;
-        // Attempt to read wavelength from metadata (commonly "Wavelength" or "wavelength")
         const char* val = band->GetMetadataItem("Wavelength");
         if (!val) val = band->GetMetadataItem("wavelength");
         if (val) {
-            double v = atof(val);
-            res.push_back(v);
+            bool ok = false;
+            double v = QString::fromLocal8Bit(val).trimmed().toDouble(&ok);
+            res.push_back(ok ? v : -1.0);
         } else {
-            // push a negative to indicate unknown
             res.push_back(-1.0);
         }
     }
+    if (!res.empty()) return res;
+#endif
+
+    // 3) Fallback: parse ENVI .hdr directly
+    return parseEnviHdrWavelengths();
+}
+
+bool RasterDataProvider::readPixelSpectrum(int x, int y, std::vector<double>& outSpectrum) const
+{
+#if HPPA_HAVE_GDAL
+    outSpectrum.clear();
+    if (!m_dataset) return false;
+    if (!isValidPixel(x, y)) return false;
+
+    const int bands = m_dataset->GetRasterCount();
+    if (bands <= 0) return false;
+
+    outSpectrum.resize(bands);
+    for (int i = 0; i < bands; ++i) {
+        GDALRasterBand* band = m_dataset->GetRasterBand(i + 1);
+        if (!band) return false;
+
+        float value = 0.0f;
+        CPLErr err = band->RasterIO(
+            GF_Read,
+            x, y,
+            1, 1,
+            &value,
+            1, 1,
+            GDT_Float32,
+            0, 0);
+
+        if (err != CE_None) return false;
+        outSpectrum[i] = static_cast<double>(value);
+    }
+
+    return true;
+#else
+    Q_UNUSED(x);
+    Q_UNUSED(y);
+    Q_UNUSED(outSpectrum);
+    return false;
 #endif
-    return res;
 }
 
 bool RasterDataProvider::readBandAsFloat(int bandIndex, std::vector<float>& outBuffer) const