Правки по работе DnD по передаче объектов.

Project/src/FormPlaneConfig.form

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <form xmlns="http://www.intellij.com/uidesigner/form/" version="1" bind-to-class="FormPlaneConfig">
-  <grid id="27dc6" binding="MainPanel" layout-manager="GridLayoutManager" row-count="4" column-count="4" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
+  <grid id="27dc6" binding="MainPanel" layout-manager="GridLayoutManager" row-count="4" column-count="5" same-size-horizontally="false" same-size-vertically="false" hgap="-1" vgap="-1">
     <margin top="0" left="0" bottom="0" right="0"/>
     <constraints>
       <xy x="20" y="20" width="1067" height="400"/>
@@ -335,16 +335,6 @@
               <text value="Доп. цвет"/>
             </properties>
           </component>
-          <component id="da776" class="javax.swing.JLabel" binding="LabelTypeWindow">
-            <constraints>
-              <grid row="0" column="1" row-span="1" col-span="1" vsize-policy="0" hsize-policy="0" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
-            </constraints>
-            <properties>
-              <horizontalAlignment value="0"/>
-              <horizontalTextPosition value="0"/>
-              <text value="Форма"/>
-            </properties>
-          </component>
           <grid id="f0d81" binding="PictureBoxPlane" layout-manager="BorderLayout" hgap="0" vgap="0">
             <constraints>
               <grid row="1" column="0" row-span="1" col-span="3" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false"/>
@@ -397,7 +387,7 @@
           </grid>
         </constraints>
       </vspacer>
-      <hspacer id="296b8">
+      <hspacer id="f542d">
         <constraints>
           <grid row="1" column="0" row-span="1" col-span="1" vsize-policy="1" hsize-policy="6" anchor="0" fill="1" indent="0" use-parent-layout="false">
             <minimum-size width="5" height="-1"/>
@@ -406,6 +396,15 @@
           </grid>
         </constraints>
       </hspacer>
+      <hspacer id="2e630">
+        <constraints>
+          <grid row="1" column="4" row-span="1" col-span="1" vsize-policy="1" hsize-policy="6" anchor="0" fill="1" indent="0" use-parent-layout="false">
+            <minimum-size width="5" height="-1"/>
+            <preferred-size width="5" height="-1"/>
+            <maximum-size width="5" height="-1"/>
+          </grid>
+        </constraints>
+      </hspacer>
     </children>
   </grid>
   <buttonGroups>

Project/src/FormPlaneConfig.java

@@ -35,7 +35,6 @@ public class FormPlaneConfig extends JFrame{
     private JPanel GroubBoxSelectedCountWindow;
     private JSpinner NumericUpDownCountWindow;
     private JPanel MainPanel;
-    private JLabel LabelTypeWindow;
     private JLabel LabelSimpleWindow;
     private JLabel LabelRectWindow;
     private JLabel LabelTriangleWindow;
@@ -47,7 +46,14 @@ public class FormPlaneConfig extends JFrame{
     //событие
     Consumer<DrawingPlane> EventAddPlane;
 
-    public void AddEvent(Consumer<DrawingPlane> ev){
+    //объект для контролирования работы DnD
+    Object dragObject;
+
+    //хранит в себе объект иллюминатор
+    Object enterObject;
+
+    public void AddEvent(Consumer<DrawingPlane> ev)
+    {
         EventAddPlane = ev;
     }
 
@@ -86,7 +92,6 @@ public class FormPlaneConfig extends JFrame{
 
         //рамки у Label
         LabelAddColor.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
-        LabelTypeWindow.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
         LabelBaseColor.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
         LabelModifiedObject.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
         LabelSimpleObject.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
@@ -123,7 +128,6 @@ public class FormPlaneConfig extends JFrame{
         PictureBoxPlane.addMouseListener(defCursor);
         LabelBaseColor.addMouseListener(defCursor);
         LabelAddColor.addMouseListener(defCursor);
-        LabelTypeWindow.addMouseListener(defCursor);
 
         PanelBlack.addMouseListener(drag);
         PanelPurple.addMouseListener(drag);
@@ -140,12 +144,20 @@ public class FormPlaneConfig extends JFrame{
         LabelRectWindow.addMouseListener(drag);
         LabelTriangleWindow.addMouseListener(drag);
 
+        //передача объекта через событие
         ButtonAddObject.addActionListener(e -> {
             EventAddPlane.accept(_plane);
             dispose();
         });
 
+        //лямбда-выражение для закрытия формы
         ButtonCancel.addActionListener(e -> dispose());
+
+        AdditWindowDropObject(LabelSimpleWindow);
+        AdditWindowDropObject(LabelRectWindow);
+        AdditWindowDropObject(LabelTriangleWindow);
+
+        AdditWindowDropTarget(PictureBoxPlane);
     }
 
     public void Drop(JComponent dropItem)
@@ -215,27 +227,84 @@ public class FormPlaneConfig extends JFrame{
                 revalidate();
             }
         }
-        else if(dropItem instanceof JLabel label && LabelTypeWindow.getMousePosition() != null && _plane!=null)
-        {
-            if(label == LabelSimpleWindow)
-            {
-                _plane.SetTypeWindow((int)NumericUpDownCountWindow.getValue(), new DrawingAirplaneWindow());
-                Draw(_plane);
     }
 
-            if(label == LabelRectWindow)
+    void AdditWindowDropTarget(JComponent obj)
     {
-                _plane.SetTypeWindow((int)NumericUpDownCountWindow.getValue(), new DrawingRectAirplaneWindow());
+        obj.addMouseListener(new MouseAdapter() {
-                Draw(_plane);
+            @Override
+            public void mouseEntered(MouseEvent e) {super.mouseEntered(e);
+                Paddle_DragEnter(obj);
+            }
+            @Override
+            public void mouseExited(MouseEvent e) {super.mouseExited(e);
+                DragExit();
+            }
+        });
     }
 
-            if(label == LabelTriangleWindow)
+    void AdditWindowDropObject(JComponent obj)
     {
-                _plane.SetTypeWindow((int)NumericUpDownCountWindow.getValue(), new DrawingTriangleAirplaneWindow());
+        obj.addMouseListener(new MouseAdapter() {
-                Draw(_plane);
+            @Override
+            public void mousePressed(MouseEvent e) {super.mousePressed(e);
+                Paddle_MouseDown(obj);
+            }
+            @Override
+            public void mouseReleased(MouseEvent e) {super.mouseReleased(e);
+                Paddle_DragDrop();
+            }
+        });
     }
 
-            repaint();
+    void Paddle_MouseDown(Object sender)
+    {
+        IAdditionalDrawingObject windows;
+        switch (((JLabel)sender).getText()){
+            case "Простая":
+                windows = new DrawingAirplaneWindow();
+                break;
+            case "Треугольная":
+                windows = new DrawingTriangleAirplaneWindow();
+                break;
+            case "Квадратная":
+                windows = new DrawingRectAirplaneWindow();
+                break;
+            default:
+                return;
+        }
+
+        enterObject = windows;
+    }
+
+    void Paddle_DragEnter(Object sender)
+    {
+        if(enterObject != null && IAdditionalDrawingObject.class.isAssignableFrom(enterObject.getClass()) && _plane != null)
+        {
+            setCursor(new Cursor(Cursor.HAND_CURSOR));
+            dragObject = sender;
+        }
+    }
+
+    void Paddle_DragDrop()
+    {
+        if(dragObject == null)
+        {
+            return;
+        }
+
+        _plane.SetTypeWindow((int)NumericUpDownCountWindow.getValue(), (IAdditionalDrawingObject)enterObject);
+        DragExit();
+        enterObject = null;
+    }
+
+    void DragExit()
+    {
+        if(enterObject != null && dragObject != null)
+        {
+            setCursor(Cursor.getDefaultCursor());
+            Draw(_plane);
+            dragObject = null;
         }
     }
 }