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Diffstat (limited to 'libjava/classpath/java/awt/dnd/DragSourceContext.java')
| -rw-r--r-- | libjava/classpath/java/awt/dnd/DragSourceContext.java | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/libjava/classpath/java/awt/dnd/DragSourceContext.java b/libjava/classpath/java/awt/dnd/DragSourceContext.java deleted file mode 100644 index e21b4fd..0000000 --- a/libjava/classpath/java/awt/dnd/DragSourceContext.java +++ /dev/null @@ -1,383 +0,0 @@ -/* DragSourceContext.java -- - Copyright (C) 2002 Free Software Foundation - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.awt.dnd; - -import java.awt.Component; -import java.awt.Cursor; -import java.awt.Image; -import java.awt.Point; -import java.awt.datatransfer.Transferable; -import java.awt.dnd.peer.DragSourceContextPeer; -import java.io.Serializable; -import java.util.TooManyListenersException; - -/** - * @since 1.2 - */ -public class DragSourceContext - implements DragSourceListener, DragSourceMotionListener, Serializable -{ - /** - * Compatible with JDK 1.2+ - */ - static final long serialVersionUID = -115407898692194719L; - - protected static final int DEFAULT = 0; - protected static final int ENTER = 1; - protected static final int OVER = 2; - protected static final int CHANGED = 3; - - private DragSourceContextPeer peer; - private Cursor cursor; - private Transferable transferable; - private DragGestureEvent trigger; - private DragSourceListener dragSourceListener; - private boolean useCustomCursor; - private int sourceActions; - private Image image; - private Point offset; - - /** - * Initializes a drag source context. - * - * @exception IllegalArgumentException If Component or DragSource of trigger - * are null, the drag action for the trigger event is DnDConstants.ACTION_NONE - * or if the source actions for the DragGestureRecognizer associated with the - * trigger event are equal to DnDConstants.ACTION_NONE. - * @exception NullPointerException If peer, trans or trigger is null or if the - * image is not null but the offset is. - */ - public DragSourceContext (DragSourceContextPeer peer, - DragGestureEvent trigger, Cursor cursor, - Image image, Point offset, Transferable trans, - DragSourceListener dsl) - { - if (peer == null - || trigger == null || trans == null - || (image != null && offset == null)) - throw new NullPointerException (); - - if (trigger.getComponent () == null - || trigger.getDragSource () == null - || trigger.getDragAction () == DnDConstants.ACTION_NONE - || trigger.getSourceAsDragGestureRecognizer () - .getSourceActions () == DnDConstants.ACTION_NONE) - throw new IllegalArgumentException (); - - this.peer = peer; - this.trigger = trigger; - this.cursor = cursor; - this.image = image; - this.offset = offset; - this.transferable = trans; - this.dragSourceListener = dsl; - this.sourceActions = trigger.getSourceAsDragGestureRecognizer().getSourceActions(); - - setCursor(cursor); - updateCurrentCursor(trigger.getDragAction(), sourceActions, DEFAULT); - } - - /** - * Returns the DragSource object associated with the - * DragGestureEvent. - * - * @return the DragSource associated with the trigger. - */ - public DragSource getDragSource() - { - return trigger.getDragSource (); - } - - /** - * Returns the component associated with this. - * - * @return the component associated with the trigger. - */ - public Component getComponent() - { - return trigger.getComponent (); - } - - /** - * Gets the trigger associated with this. - * - * @return the trigger. - */ - public DragGestureEvent getTrigger() - { - return trigger; - } - - /** - * Returns the source actions for the DragGestureRecognizer. - * - * @return the source actions for DragGestureRecognizer. - */ - public int getSourceActions() - { - if (sourceActions == 0) - sourceActions = trigger.getSourceAsDragGestureRecognizer().getSourceActions(); - return sourceActions; - } - - /** - * Sets the cursor for this drag operation to the specified cursor. - * - * @param cursor c - the Cursor to use, or null to use the default drag - * cursor. - */ - public void setCursor(Cursor cursor) - { - if (cursor == null) - useCustomCursor = false; - else - useCustomCursor = true; - this.cursor = cursor; - peer.setCursor(cursor); - } - - /** - * Returns the current cursor or null if the default - * drag cursor is used. - * - * @return the current cursor or null. - */ - public Cursor getCursor() - { - return cursor; - } - - /** - * Adds a <code>DragSourceListener</code>. - * - * @exception TooManyListenersException If a <code>DragSourceListener</code> - * has already been added. - */ - public void addDragSourceListener (DragSourceListener dsl) - throws TooManyListenersException - { - if (dragSourceListener != null) - throw new TooManyListenersException (); - - dragSourceListener = dsl; - } - - public void removeDragSourceListener (DragSourceListener dsl) - { - if (dragSourceListener == dsl) - dragSourceListener = null; - } - - /** - * This function tells the peer that the DataFlavors have been modified. - */ - public void transferablesFlavorsChanged() - { - peer.transferablesFlavorsChanged(); - } - - /** - * Calls dragEnter on the listeners registered with this - * and with the DragSource. - * - * @param e - the DragSourceDragEvent - */ - public void dragEnter(DragSourceDragEvent e) - { - if (dragSourceListener != null) - dragSourceListener.dragEnter(e); - - DragSource ds = getDragSource(); - DragSourceListener[] dsl = ds.getDragSourceListeners(); - for (int i = 0; i < dsl.length; i++) - dsl[i].dragEnter(e); - - updateCurrentCursor(e.getDropAction(), e.getTargetActions(), ENTER); - } - - /** - * Calls dragOver on the listeners registered with this - * and with the DragSource. - * - * @param e - the DragSourceDragEvent - */ - public void dragOver(DragSourceDragEvent e) - { - if (dragSourceListener != null) - dragSourceListener.dragOver(e); - - DragSource ds = getDragSource(); - DragSourceListener[] dsl = ds.getDragSourceListeners(); - for (int i = 0; i < dsl.length; i++) - dsl[i].dragOver(e); - - updateCurrentCursor(e.getDropAction(), e.getTargetActions(), OVER); - } - - /** - * Calls dragExit on the listeners registered with this - * and with the DragSource. - * - * @param e - the DragSourceEvent - */ - public void dragExit(DragSourceEvent e) - { - if (dragSourceListener != null) - dragSourceListener.dragExit(e); - - DragSource ds = getDragSource(); - DragSourceListener[] dsl = ds.getDragSourceListeners(); - for (int i = 0; i < dsl.length; i++) - dsl[i].dragExit(e); - - updateCurrentCursor(DnDConstants.ACTION_NONE, DnDConstants.ACTION_NONE, - DEFAULT); - } - - /** - * Calls dropActionChanged on the listeners registered with this - * and with the DragSource. - * - * @param e - the DragSourceDragEvent - */ - public void dropActionChanged(DragSourceDragEvent e) - { - if (dragSourceListener != null) - dragSourceListener.dropActionChanged(e); - - DragSource ds = getDragSource(); - DragSourceListener[] dsl = ds.getDragSourceListeners(); - for (int i = 0; i < dsl.length; i++) - dsl[i].dropActionChanged(e); - - updateCurrentCursor(e.getDropAction(), e.getTargetActions(), CHANGED); - } - - /** - * Calls dragDropEnd on the listeners registered with this - * and with the DragSource. - * - * @param e - the DragSourceDropEvent - */ - public void dragDropEnd(DragSourceDropEvent e) - { - if (dragSourceListener != null) - dragSourceListener.dragDropEnd(e); - - DragSource ds = getDragSource(); - DragSourceListener[] dsl = ds.getDragSourceListeners(); - for (int i = 0; i < dsl.length; i++) - dsl[i].dragDropEnd(e); - } - - /** - * Calls dragMouseMoved on the listeners registered with the DragSource. - * - * @param e - the DragSourceDragEvent - */ - public void dragMouseMoved(DragSourceDragEvent e) - { - DragSource ds = getDragSource(); - DragSourceMotionListener[] dsml = ds.getDragSourceMotionListeners(); - for (int i = 0; i < dsml.length; i++) - dsml[i].dragMouseMoved(e); - } - - /** - * Returns the Transferable set with this object. - * - * @return the transferable. - */ - public Transferable getTransferable() - { - return transferable; - } - - /** - * This function sets the drag cursor for the specified operation, actions and - * status if the default drag cursor is active. Otherwise, the cursor is not - * updated in any way. - * - * @param dropOp - the current operation. - * @param targetAct - the supported actions. - * @param status - the status of the cursor (constant). - */ - protected void updateCurrentCursor(int dropOp, int targetAct, int status) - { - if (! useCustomCursor) - { - Cursor newCursor = null; - switch (status) - { - default: - targetAct = DnDConstants.ACTION_NONE; - case ENTER: - case CHANGED: - case OVER: - int action = dropOp & targetAct; - if (action == DnDConstants.ACTION_NONE) - { - if ((dropOp & DnDConstants.ACTION_LINK) != 0) - newCursor = DragSource.DefaultLinkNoDrop; - else if ((dropOp & DnDConstants.ACTION_MOVE) != 0) - newCursor = DragSource.DefaultMoveNoDrop; - else - newCursor = DragSource.DefaultCopyNoDrop; - } - else - { - if ((dropOp & DnDConstants.ACTION_LINK) != 0) - newCursor = DragSource.DefaultLinkDrop; - else if ((dropOp & DnDConstants.ACTION_MOVE) != 0) - newCursor = DragSource.DefaultMoveDrop; - else - newCursor = DragSource.DefaultCopyDrop; - } - } - - if (cursor == null || ! cursor.equals(newCursor)) - { - cursor = newCursor; - DragSourceContextPeer p = peer; - if (p != null) - p.setCursor(cursor); - } - } - } -} // class DragSourceContext |