S283 Planetary Science &… the Search for Life CD 3/0_CD-ROM.iso/install/jre1_3/lib/rt.jar/java/awt/dnd/DropTarget.class

Java Class File | 1979-12-31 | 4.8 KB | 270 lines

package java.awt.dnd;

import java.awt.Component;
import java.awt.Point;
import java.awt.datatransfer.FlavorMap;
import java.awt.datatransfer.SystemFlavorMap;
import java.awt.dnd.peer.DropTargetPeer;
import java.awt.peer.ComponentPeer;
import java.awt.peer.LightweightPeer;
import java.io.Serializable;
import java.util.TooManyListenersException;

public class DropTarget implements DropTargetListener, Serializable {
   static final long serialVersionUID = -6283860791671019047L;
   private static final FlavorMap defaultFlavorMap = SystemFlavorMap.getDefaultFlavorMap();
   private transient DropTargetContext dropTargetContext;
   private Component component;
   private transient ComponentPeer componentPeer;
   private transient ComponentPeer nativePeer;
   int actions;
   boolean active;
   private transient DropTargetAutoScroller autoScroller;
   private DropTargetListener dtListener;
   private transient FlavorMap flavorMap;

   public DropTarget(Component var1, int var2, DropTargetListener var3, boolean var4, FlavorMap var5) {
      this.actions = 3;
      this.active = true;
      this.flavorMap = defaultFlavorMap;
      this.component = var1;
      this.setDefaultActions(var2);
      if (var3 != null) {
         try {
            this.addDropTargetListener(var3);
         } catch (TooManyListenersException var7) {
         }
      }

      if (var1 != null) {
         var1.setDropTarget(this);
         this.setActive(var4);
      }

      if (var5 != null) {
         this.flavorMap = var5;
      }

   }

   public DropTarget(Component var1, int var2, DropTargetListener var3, boolean var4) {
      this(var1, var2, var3, var4, (FlavorMap)null);
   }

   public DropTarget() {
      this((Component)null, 3, (DropTargetListener)null, true, (FlavorMap)null);
   }

   public DropTarget(Component var1, DropTargetListener var2) {
      this(var1, 3, var2, true, (FlavorMap)null);
   }

   public DropTarget(Component var1, int var2, DropTargetListener var3) {
      this(var1, var2, var3, true);
   }

   public synchronized void setComponent(Component var1) {
      if (this.component != var1 && (this.component == null || !this.component.equals(var1))) {
         ComponentPeer var3 = null;
         Component var2;
         if ((var2 = this.component) != null) {
            this.clearAutoscroll();
            this.component = null;
            if (this.componentPeer != null) {
               var3 = this.componentPeer;
               this.removeNotify(this.componentPeer);
            }

            var2.setDropTarget((DropTarget)null);
         }

         if ((this.component = var1) != null) {
            try {
               var1.setDropTarget(this);
            } catch (Exception var5) {
               if (var2 != null) {
                  var2.setDropTarget(this);
                  this.addNotify(var3);
               }
            }
         }

      }
   }

   public synchronized Component getComponent() {
      return this.component;
   }

   public synchronized void setDefaultActions(int var1) {
      this.actions = var1 & 1073741827;
      if (this.dropTargetContext != null) {
         this.dropTargetContext.setTargetActions(this.actions);
      }

   }

   public synchronized int getDefaultActions() {
      return this.actions;
   }

   public synchronized void setActive(boolean var1) {
      if (var1 != this.active) {
         this.active = var1;
      }

      if (!this.active) {
         this.clearAutoscroll();
      }

   }

   public synchronized boolean isActive() {
      return this.active;
   }

   public synchronized void addDropTargetListener(DropTargetListener var1) throws TooManyListenersException {
      if (var1 != null) {
         if (this.equals(var1)) {
            throw new IllegalArgumentException("DropTarget may not be its own Listener");
         } else if (this.dtListener == null) {
            this.dtListener = var1;
         } else {
            throw new TooManyListenersException();
         }
      }
   }

   public synchronized void removeDropTargetListener(DropTargetListener var1) {
      if (var1 != null && this.dtListener != null) {
         if (!this.dtListener.equals(var1)) {
            throw new IllegalArgumentException("listener mismatch");
         }

         this.dtListener = null;
      }

   }

   public synchronized void dragEnter(DropTargetDragEvent var1) {
      if (this.active) {
         if (this.dtListener != null) {
            this.dtListener.dragEnter(var1);
         } else {
            ((DropTargetEvent)var1).getDropTargetContext().setTargetActions(0);
         }

         this.initializeAutoscrolling(var1.getLocation());
      }
   }

   public synchronized void dragOver(DropTargetDragEvent var1) {
      if (this.active) {
         if (this.dtListener != null && this.active) {
            this.dtListener.dragOver(var1);
         }

         this.updateAutoscroll(var1.getLocation());
      }
   }

   public void dropActionChanged(DropTargetDragEvent var1) {
      if (this.active) {
         if (this.dtListener != null) {
            this.dtListener.dropActionChanged(var1);
         }

         this.updateAutoscroll(var1.getLocation());
      }
   }

   public synchronized void dragExit(DropTargetEvent var1) {
      if (this.active) {
         if (this.dtListener != null && this.active) {
            this.dtListener.dragExit(var1);
         }

         this.clearAutoscroll();
      }
   }

   public synchronized void drop(DropTargetDropEvent var1) {
      if (this.dtListener != null && this.active) {
         this.dtListener.drop(var1);
      } else {
         var1.rejectDrop();
      }

   }

   public FlavorMap getFlavorMap() {
      return this.flavorMap;
   }

   public void setFlavorMap(FlavorMap var1) {
      this.flavorMap = var1 == null ? defaultFlavorMap : var1;
   }

   public void addNotify(ComponentPeer var1) {
      if (var1 != this.componentPeer) {
         this.componentPeer = var1;

         for(Object var2 = this.component; var1 instanceof LightweightPeer; var2 = ((Component)var2).getParent()) {
            var1 = ((Component)var2).getPeer();
         }

         try {
            ((DropTargetPeer)(this.nativePeer = var1)).addDropTarget(this);
         } catch (ClassCastException var4) {
            this.nativePeer = null;
         }

      }
   }

   public void removeNotify(ComponentPeer var1) {
      if (this.nativePeer != null) {
         ((DropTargetPeer)this.nativePeer).removeDropTarget(this);
      }

      this.componentPeer = this.nativePeer = null;
   }

   public DropTargetContext getDropTargetContext() {
      if (this.dropTargetContext == null) {
         this.dropTargetContext = this.createDropTargetContext();
      }

      return this.dropTargetContext;
   }

   protected DropTargetContext createDropTargetContext() {
      return new DropTargetContext(this);
   }

   protected DropTargetAutoScroller createDropTargetAutoScroller(Component var1, Point var2) {
      return new DropTargetAutoScroller(var1, var2);
   }

   protected void initializeAutoscrolling(Point var1) {
      if (this.component != null && this.component instanceof Autoscroll) {
         this.autoScroller = this.createDropTargetAutoScroller(this.component, var1);
      }
   }

   protected void updateAutoscroll(Point var1) {
      if (this.autoScroller != null) {
         this.autoScroller.updateLocation(var1);
      }

   }

   protected void clearAutoscroll() {
      if (this.autoScroller != null) {
         this.autoScroller.stop();
         this.autoScroller = null;
      }

   }
}