Add Drag drop zip files and folder

weasis-base/weasis-base-ui/src/main/java/org/weasis/base/ui/gui/WeasisWin.java

@@ -1151,9 +1151,35 @@ protected boolean dropFiles(List<File> files, TransferSupport support) {
           }
         }
 
+        // Separate zip files from regular files
+        List<File> zipFiles = new ArrayList<>();
+        List<File> regularFiles = new ArrayList<>();
+        for (File file : files) {
+          if (!file.isDirectory() && file.getName().toLowerCase().endsWith(".zip")) { // NON-NLS
+            zipFiles.add(file);
+          } else {
+            regularFiles.add(file);
+          }
+        }
+
+        // Process zip files using DicomSeriesHandler if available
+        if (!zipFiles.isEmpty()) {
+
+          try {
+            Class<?> dicomSeriesHandlerClass = Class.forName("org.weasis.dicom.explorer.DicomSeriesHandler"); // NON-NLS
+            java.lang.reflect.Method dropDicomFilesMethod = dicomSeriesHandlerClass.getMethod("dropDicomFiles", List.class);
+            Boolean result = (Boolean) dropDicomFilesMethod.invoke(null, zipFiles);
+            if (Boolean.TRUE.equals(result)) {
+              // Zip files processed successfully
+            }
+          } catch (Exception e) {
+            LOGGER.warn("Cannot process DICOM zip files via DicomSeriesHandler", e);
+          }
+        }
+
         final List<File> dirs = new ArrayList<>();
         Map<Codec, List<File>> codecs = new HashMap<>();
-        for (File file : files) {
+        for (File file : regularFiles) {
           if (file.isDirectory()) {
             dirs.add(file);
             continue;

weasis-dicom/weasis-dicom-explorer/src/main/java/org/weasis/dicom/explorer/DicomSeriesHandler.java

@@ -37,6 +37,7 @@
 import org.weasis.dicom.codec.DicomSeries;
 import org.weasis.dicom.explorer.HangingProtocols.OpeningViewer;
 
+
 public class DicomSeriesHandler extends SequenceHandler {
   private static final Logger LOGGER = LoggerFactory.getLogger(DicomSeriesHandler.class);
   protected final ViewCanvas<DicomImageElement> viewCanvas;
@@ -164,8 +165,28 @@ public static boolean dropDicomFiles(List<File> files) {
       DicomModel model = (DicomModel) dicomView.getDataExplorerModel();
       OpeningViewer openingViewer =
           OpeningViewer.getOpeningViewerByLocalKey(LocalImport.LAST_OPEN_VIEWER_MODE);
-      DicomModel.LOADING_EXECUTOR.execute(
-          new LoadLocalDicom(files.toArray(File[]::new), true, model, openingViewer));
+
+      // Drag and Drop to open zip files
+      List<File> zipFiles = new ArrayList<>();
+      List<File> regularFiles = new ArrayList<>();
+
+      for (File file : files) {
+        if (file.getName().toLowerCase().endsWith(".zip")) { // NON-NLS
+          zipFiles.add(file);
+        } else {
+          regularFiles.add(file);
+        }
+      }
+
+      for (File zipFile : zipFiles) {
+        DicomZipImport.loadDicomZip(
+            zipFile, model, openingViewer, GuiUtils.getUICore().getApplicationWindow());
+      }
+
+      if (!regularFiles.isEmpty()) {
+        DicomModel.LOADING_EXECUTOR.execute(
+            new LoadLocalDicom(regularFiles.toArray(File[]::new), true, model, openingViewer));
+      }
       return true;
     }
     return false;

weasis-dicom/weasis-dicom-explorer/src/main/java/org/weasis/dicom/explorer/ImportDicom.java

@@ -14,5 +14,6 @@
 
 public interface ImportDicom extends PageItem {
 
+
   void importDICOM(DicomModel dicomModel, JProgressBar info);
 }