Decreased sensitivity for DnD to start in TabFrames.

src/main/java/com/weis/darklaf/ui/tabframe/DarkTabFrameTabContainerUI.java

@@ -38,7 +38,6 @@ import java.awt.event.ActionEvent;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
-import java.awt.event.MouseMotionListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 
@@ -54,7 +53,7 @@ public class DarkTabFrameTabContainerUI extends DarkPanelUI implements PropertyC
             }
         }
     };
-    private MouseMotionListener dragListener;
+    private TabDragListener dragListener;
     private HoverListener hoverListener;
     private Color selectedColor;
     private Color hoverColor;
@@ -81,11 +80,13 @@ public class DarkTabFrameTabContainerUI extends DarkPanelUI implements PropertyC
         tabContainer.addMouseListener(hoverListener);
         tabContainer.addPropertyChangeListener(this);
         tabContainer.addMouseListener(mouseListener);
+        tabContainer.addMouseListener(dragListener);
         tabContainer.addMouseMotionListener(dragListener);
         var cont = tabContainer.getContent();
         if (cont != null) {
             cont.addMouseListener(hoverListener);
             cont.addMouseListener(mouseListener);
+            cont.addMouseListener(dragListener);
             cont.addMouseMotionListener(dragListener);
         }
     }
@@ -131,12 +132,14 @@ public class DarkTabFrameTabContainerUI extends DarkPanelUI implements PropertyC
     protected void uninstallListeners() {
         tabContainer.removeMouseListener(hoverListener);
         tabContainer.removeMouseListener(mouseListener);
+        tabContainer.removeMouseListener(dragListener);
         tabContainer.removePropertyChangeListener(this);
         tabContainer.removeMouseMotionListener(dragListener);
         var cont = tabContainer.getContent();
         if (cont != null) {
             cont.removeMouseListener(hoverListener);
             cont.removeMouseListener(mouseListener);
+            cont.removeMouseListener(dragListener);
             cont.removeMouseMotionListener(dragListener);
         }
         dragListener = null;
@@ -166,11 +169,13 @@ public class DarkTabFrameTabContainerUI extends DarkPanelUI implements PropertyC
             if (oldVal instanceof Component) {
                 ((Component) oldVal).removeMouseListener(mouseListener);
                 ((Component) oldVal).removeMouseListener(hoverListener);
+                ((Component) oldVal).removeMouseListener(dragListener);
                 ((Component) oldVal).removeMouseMotionListener(dragListener);
             }
             if (newVal instanceof Component) {
                 ((Component) newVal).addMouseListener(mouseListener);
                 ((Component) newVal).addMouseListener(hoverListener);
+                ((Component) newVal).addMouseListener(dragListener);
                 ((Component) newVal).addMouseMotionListener(dragListener);
             }
         } else if ("selected".equals(key)) {

src/main/java/com/weis/darklaf/ui/tabframe/DarkTabFrameTabLabelUI.java

@@ -44,7 +44,6 @@ import java.awt.event.ActionEvent;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
-import java.awt.event.MouseMotionListener;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 
@@ -60,7 +59,7 @@ public class DarkTabFrameTabLabelUI extends DarkLabelUI implements PropertyChang
             }
         }
     };
-    private MouseMotionListener dragListener;
+    private TabDragListener dragListener;
     private HoverListener hoverListener;
     private Color defaultFontColor;
     private Color selectedFontColor;
@@ -153,6 +152,7 @@ public class DarkTabFrameTabLabelUI extends DarkLabelUI implements PropertyChang
         tabComponent.addMouseListener(mouseListener);
         installAccelerator(tabComponent.getTabFrame());
         tabComponent.addMouseMotionListener(dragListener);
+        tabComponent.addMouseListener(dragListener);
     }
 
     @Override
@@ -162,6 +162,7 @@ public class DarkTabFrameTabLabelUI extends DarkLabelUI implements PropertyChang
         tabComponent.removeMouseListener(mouseListener);
         uninstallAccelerator(tabComponent.getTabFrame());
         tabComponent.removeMouseMotionListener(dragListener);
+        tabComponent.removeMouseListener(dragListener);
         dragListener = null;
     }
 

src/main/java/com/weis/darklaf/ui/tabframe/TabDragListener.java

@@ -30,6 +30,7 @@ import org.jdesktop.jxlayer.JXLayer;
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
+import java.awt.*;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 
@@ -41,8 +42,22 @@ public class TabDragListener extends MouseAdapter {
         this.tabComponent = tabComponent;
     }
 
+    protected Point origin;
+
+    @Override
+    public void mousePressed(@NotNull final MouseEvent e) {
+        origin = e.getPoint();
+    }
+
+    @Override
+    public void mouseReleased(final MouseEvent e) {
+        origin = null;
+    }
+
     @Override
     public void mouseDragged(@NotNull final MouseEvent e) {
+        if (origin == null) origin = e.getPoint();
+        if (distance(origin, e.getPoint()) < 100) return;
         var th = tabComponent.getTabFrame().getTransferHandler();
         if (th != null && tabComponent.getTabFrame().isDndEnabled()) {
             var p = e.getPoint();
@@ -57,4 +72,8 @@ public class TabDragListener extends MouseAdapter {
                             TransferHandler.MOVE);
         }
     }
+
+    protected int distance(@NotNull final Point p1, @NotNull final Point p2) {
+        return (p1.x - p2.x) * (p1.x - p2.x) + (p1.y - p2.y) * (p1.y - p2.y);
+    }
 }