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/RasterLayer.cpp

@@ -36,6 +36,40 @@ bool RasterLayer::openDataProvider()
     return ok;
 }
 
+bool RasterLayer::isValidPixel(int x, int y)
+{
+    if (!m_provider) {
+        if (!openDataProvider()) return false;
+    }
+    return m_provider->isValidPixel(x, y);
+}
+
+bool RasterLayer::readPixelSpectrum(int x, int y, QVector<double>& wavelengths, QVector<double>& spectrum)
+{
+    if (!m_provider) {
+        if (!openDataProvider()) return false;
+    }
+
+    std::vector<double> wl;
+    std::vector<double> sp;
+
+    if (!m_provider->readPixelSpectrum(x, y, sp)) return false;
+
+    wl = m_provider->bandWavelengths();
+
+    wavelengths = QVector<double>::fromStdVector(wl);
+    spectrum = QVector<double>::fromStdVector(sp);
+
+    if (wavelengths.size() != spectrum.size()) {
+        wavelengths.resize(spectrum.size());
+        for (int i = 0; i < wavelengths.size(); ++i) {
+            wavelengths[i] = i;
+        }
+    }
+
+    return true;
+}
+
 QImage RasterLayer::render(const RenderParams& params)
 {
     if (!m_provider) {