Fix drag and drop

Author: LukeOnuke

src/main/java/com/lukeonuke/lmark/ApplicationConstants.java

@@ -16,5 +16,5 @@ public class ApplicationConstants {
     public static final String MARKDOWN_CACHE_PATH = "markdown-renderer-cache";
     public static final Font FONTS_AWESOME = Font.loadFont(LMark.class.getResourceAsStream("/gui/fa-6-solid.otf"), 12);
     public static final String TMP = "tmp/";
-    public static final String APPDIR = LMark.class.getName();
+    public static final String APPDIR = ".lmark";
 }

src/main/java/com/lukeonuke/lmark/gui/StartWindow.java

@@ -16,6 +16,7 @@
 import javafx.scene.control.ListView;
 import javafx.scene.image.Image;
 import javafx.scene.input.Dragboard;
+import javafx.scene.input.TransferMode;
 import javafx.scene.layout.AnchorPane;
 import javafx.stage.FileChooser;
 import javafx.stage.Stage;
@@ -82,12 +83,19 @@ public void show() {
         });
 
         root.setOnDragOver(dragEvent -> {
+            if (dragEvent.getDragboard().hasFiles()) dragEvent.acceptTransferModes(TransferMode.ANY);
+        });
+
+        root.setOnDragDropped(dragEvent -> {
             Dragboard db = dragEvent.getDragboard();
+            if(!db.hasFiles()) return;
             File file = db.getFiles().get(0);
 
             try {
                 FileUtils.getInstance(file.getPath());
                 hide();
+                dragEvent.setDropCompleted(true);
+                dragEvent.consume();
 
                 FileUtils.addToRecents(file);
 

src/main/java/com/lukeonuke/lmark/util/OSIntegration.java

@@ -143,7 +143,7 @@ public static File getAppData(){
         if(OS.equals(OperatingSystem.MACOS)){
             return new File(File.separator + "Library" +
                     File.separator + "Application Support" +
-                    File.separator + ApplicationConstants.APPDIR + File.separator);
+                    File.separator + LMark.class.getName() + File.separator);
         }
         return new File(System.getProperty("user.home") +
                 File.separator + ApplicationConstants.APPDIR + File.separator);