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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/Window.java
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diff --git a/libjava/classpath/java/awt/Window.java b/libjava/classpath/java/awt/Window.java
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+/* Window.java --
+ Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005 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;
+
+import java.awt.event.ComponentEvent;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowFocusListener;
+import java.awt.event.WindowListener;
+import java.awt.event.WindowStateListener;
+import java.awt.image.BufferStrategy;
+import java.awt.peer.WindowPeer;
+import java.lang.ref.Reference;
+import java.lang.ref.WeakReference;
+import java.util.EventListener;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import java.util.Vector;
+
+import javax.accessibility.Accessible;
+import javax.accessibility.AccessibleContext;
+import javax.accessibility.AccessibleRole;
+import javax.accessibility.AccessibleState;
+import javax.accessibility.AccessibleStateSet;
+
+/**
+ * This class represents a top-level window with no decorations.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @author Warren Levy (warrenl@cygnus.com)
+ */
+public class Window extends Container implements Accessible
+{
+ private static final long serialVersionUID = 4497834738069338734L;
+
+ // Serialized fields, from Sun's serialization spec.
+ private String warningString = null;
+ private int windowSerializedDataVersion = 0; // FIXME
+ /** @since 1.2 */
+ // private FocusManager focusMgr; // FIXME: what is this?
+ /** @since 1.2 */
+ private int state = 0;
+ /** @since 1.4 */
+ private boolean focusableWindowState = true;
+ /** @since 1.5 */
+ private boolean alwaysOnTop = false;
+
+ // A list of other top-level windows owned by this window.
+ private transient Vector ownedWindows = new Vector();
+
+ private transient WindowListener windowListener;
+ private transient WindowFocusListener windowFocusListener;
+ private transient WindowStateListener windowStateListener;
+
+ private transient boolean shown;
+
+ // This is package-private to avoid an accessor method.
+ transient Component windowFocusOwner;
+
+ /*
+ * The number used to generate the name returned by getName.
+ */
+ private static transient long next_window_number;
+
+ protected class AccessibleAWTWindow extends AccessibleAWTContainer
+ {
+ private static final long serialVersionUID = 4215068635060671780L;
+
+ public AccessibleRole getAccessibleRole()
+ {
+ return AccessibleRole.WINDOW;
+ }
+
+ public AccessibleStateSet getAccessibleStateSet()
+ {
+ AccessibleStateSet states = super.getAccessibleStateSet();
+ if (isActive())
+ states.add(AccessibleState.ACTIVE);
+ return states;
+ }
+ }
+
+ /**
+ * This (package access) constructor is used by subclasses that want
+ * to build windows that do not have parents. Eg. toplevel
+ * application frames. Subclasses cannot call super(null), since
+ * null is an illegal argument.
+ */
+ Window()
+ {
+ visible = false;
+ // Windows are the only Containers that default to being focus
+ // cycle roots.
+ focusCycleRoot = true;
+ setLayout(new BorderLayout());
+
+ GraphicsEnvironment g = GraphicsEnvironment.getLocalGraphicsEnvironment();
+ graphicsConfig = g.getDefaultScreenDevice().getDefaultConfiguration();
+ }
+
+ Window(GraphicsConfiguration gc)
+ {
+ this();
+ graphicsConfig = gc;
+ }
+
+ /**
+ * Initializes a new instance of <code>Window</code> with the specified
+ * parent. The window will initially be invisible.
+ *
+ * @param owner The owning <code>Frame</code> of this window.
+ *
+ * @exception IllegalArgumentException If the owner's GraphicsConfiguration
+ * is not from a screen device, or if owner is null; this exception is always
+ * thrown when GraphicsEnvironment.isHeadless returns true.
+ */
+ public Window(Frame owner)
+ {
+ this (owner, owner.getGraphicsConfiguration ());
+ }
+
+ /**
+ * Initializes a new instance of <code>Window</code> with the specified
+ * parent. The window will initially be invisible.
+ *
+ * @exception IllegalArgumentException If the owner's GraphicsConfiguration
+ * is not from a screen device, or if owner is null; this exception is always
+ * thrown when GraphicsEnvironment.isHeadless returns true.
+ *
+ * @since 1.2
+ */
+ public Window(Window owner)
+ {
+ this (owner, owner.getGraphicsConfiguration ());
+ }
+
+ /**
+ * Initializes a new instance of <code>Window</code> with the specified
+ * parent. The window will initially be invisible.
+ *
+ * @exception IllegalArgumentException If owner is null or if gc is not from a
+ * screen device; this exception is always thrown when
+ * GraphicsEnvironment.isHeadless returns true.
+ *
+ * @since 1.3
+ */
+ public Window(Window owner, GraphicsConfiguration gc)
+ {
+ this ();
+
+ synchronized (getTreeLock())
+ {
+ if (owner == null)
+ throw new IllegalArgumentException ("owner must not be null");
+
+ parent = owner;
+ owner.ownedWindows.add(new WeakReference(this));
+ }
+
+ // FIXME: make this text visible in the window.
+ SecurityManager s = System.getSecurityManager();
+ if (s != null && ! s.checkTopLevelWindow(this))
+ warningString = System.getProperty("awt.appletWarning");
+
+ if (gc != null
+ && gc.getDevice().getType() != GraphicsDevice.TYPE_RASTER_SCREEN)
+ throw new IllegalArgumentException ("gc must be from a screen device");
+
+ if (gc == null)
+ graphicsConfig = GraphicsEnvironment.getLocalGraphicsEnvironment()
+ .getDefaultScreenDevice()
+ .getDefaultConfiguration();
+ else
+ graphicsConfig = gc;
+ }
+
+ /**
+ * Creates the native peer for this window.
+ */
+ public void addNotify()
+ {
+ if (peer == null)
+ peer = getToolkit().createWindow(this);
+ super.addNotify();
+ }
+
+ /**
+ * Relays out this window's child components at their preferred size.
+ *
+ * @specnote pack() doesn't appear to be called internally by show(), so
+ * we duplicate some of the functionality.
+ */
+ public void pack()
+ {
+ if (parent != null && !parent.isDisplayable())
+ parent.addNotify();
+ if (peer == null)
+ addNotify();
+
+ setSize(getPreferredSize());
+
+ validate();
+ }
+
+ /**
+ * Shows on-screen this window and any of its owned windows for whom
+ * isVisible returns true.
+ * @specnote: Deprecated starting in 1.5.
+ */
+ @Deprecated
+ public void show()
+ {
+ synchronized (getTreeLock())
+ {
+ if (peer == null)
+ addNotify();
+
+ validate();
+ if (visible)
+ toFront();
+ else
+ {
+ super.show();
+ // Show visible owned windows.
+ Iterator e = ownedWindows.iterator();
+ while (e.hasNext())
+ {
+ Window w = (Window) (((Reference) e.next()).get());
+ if (w != null)
+ {
+ if (w.isVisible())
+ w.getPeer().setVisible(true);
+ }
+ else
+ // Remove null weak reference from ownedWindows.
+ // Unfortunately this can't be done in the Window's
+ // finalize method because there is no way to guarantee
+ // synchronous access to ownedWindows there.
+ e.remove();
+ }
+ }
+ KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
+ manager.setGlobalFocusedWindow(this);
+
+ if (! shown)
+ {
+ FocusTraversalPolicy policy = getFocusTraversalPolicy();
+ Component initialFocusOwner = null;
+
+ if (policy != null)
+ initialFocusOwner = policy.getInitialComponent(this);
+
+ if (initialFocusOwner != null)
+ initialFocusOwner.requestFocusInWindow();
+
+ // Post WINDOW_OPENED from here.
+ if (windowListener != null
+ || (eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0)
+ {
+ WindowEvent ev = new WindowEvent(this,
+ WindowEvent.WINDOW_OPENED);
+ Toolkit tk = Toolkit.getDefaultToolkit();
+ tk.getSystemEventQueue().postEvent(ev);
+ }
+ shown = true;
+ }
+ }
+ }
+
+ /**
+ * @specnote: Deprecated starting in 1.5.
+ */
+ @Deprecated
+ public void hide()
+ {
+ // Hide visible owned windows.
+ synchronized (getTreeLock ())
+ {
+ Iterator e = ownedWindows.iterator();
+ while(e.hasNext())
+ {
+ Window w = (Window)(((Reference) e.next()).get());
+ if (w != null)
+ {
+ if (w.isVisible() && w.getPeer() != null)
+ w.getPeer().setVisible(false);
+ }
+ else
+ e.remove();
+ }
+ }
+ super.hide();
+ }
+
+ /**
+ * Destroys any resources associated with this window. This includes
+ * all components in the window and all owned top-level windows.
+ */
+ public void dispose()
+ {
+ hide();
+
+ synchronized (getTreeLock ())
+ {
+ Iterator e = ownedWindows.iterator();
+ while(e.hasNext())
+ {
+ Window w = (Window)(((Reference) e.next()).get());
+ if (w != null)
+ w.dispose();
+ else
+ // Remove null weak reference from ownedWindows.
+ e.remove();
+ }
+
+ for (int i = 0; i < ncomponents; ++i)
+ component[i].removeNotify();
+ this.removeNotify();
+
+ // Post WINDOW_CLOSED from here.
+ if (windowListener != null
+ || (eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0)
+ {
+ WindowEvent ev = new WindowEvent(this,
+ WindowEvent.WINDOW_CLOSED);
+ Toolkit tk = Toolkit.getDefaultToolkit();
+ tk.getSystemEventQueue().postEvent(ev);
+ }
+ }
+ }
+
+ /**
+ * Sends this window to the back so that all other windows display in
+ * front of it.
+ *
+ * If the window is set to be always-on-top, this will remove its
+ * always-on-top status.
+ */
+ public void toBack()
+ {
+ if (peer != null)
+ {
+ if( alwaysOnTop )
+ setAlwaysOnTop( false );
+ ( (WindowPeer) peer ).toBack();
+ }
+ }
+
+ /**
+ * Brings this window to the front so that it displays in front of
+ * any other windows.
+ */
+ public void toFront()
+ {
+ if (peer != null)
+ ( (WindowPeer) peer ).toFront();
+ }
+
+ /**
+ * Returns the toolkit used to create this window.
+ *
+ * @return The toolkit used to create this window.
+ *
+ * @specnote Unlike Component.getToolkit, this implementation always
+ * returns the value of Toolkit.getDefaultToolkit().
+ */
+ public Toolkit getToolkit()
+ {
+ return Toolkit.getDefaultToolkit();
+ }
+
+ /**
+ * Returns the warning string that will be displayed if this window is
+ * popped up by an unsecure applet or application.
+ *
+ * @return The unsecure window warning message.
+ */
+ public final String getWarningString()
+ {
+ return warningString;
+ }
+
+ /**
+ * Returns the locale that this window is configured for.
+ *
+ * @return The locale this window is configured for.
+ */
+ public Locale getLocale()
+ {
+ return locale == null ? Locale.getDefault() : locale;
+ }
+
+ /*
+ /** @since 1.2
+ public InputContext getInputContext()
+ {
+ // FIXME
+ }
+ */
+
+ /**
+ * Sets the cursor for this window to the specifiec cursor.
+ *
+ * @param cursor The new cursor for this window.
+ */
+ public void setCursor(Cursor cursor)
+ {
+ super.setCursor(cursor);
+ }
+
+ public Window getOwner()
+ {
+ return (Window) parent;
+ }
+
+ /** @since 1.2 */
+ public Window[] getOwnedWindows()
+ {
+ Window [] trimmedList;
+ synchronized (getTreeLock ())
+ {
+ // Windows with non-null weak references in ownedWindows.
+ Window [] validList = new Window [ownedWindows.size()];
+
+ Iterator e = ownedWindows.iterator();
+ int numValid = 0;
+ while (e.hasNext())
+ {
+ Window w = (Window)(((Reference) e.next()).get());
+ if (w != null)
+ validList[numValid++] = w;
+ else
+ // Remove null weak reference from ownedWindows.
+ e.remove();
+ }
+
+ if (numValid != validList.length)
+ {
+ trimmedList = new Window [numValid];
+ System.arraycopy (validList, 0, trimmedList, 0, numValid);
+ }
+ else
+ trimmedList = validList;
+ }
+ return trimmedList;
+ }
+
+ /**
+ * Adds the specified listener to the list of <code>WindowListeners</code>
+ * that will receive events for this window.
+ *
+ * @param listener The <code>WindowListener</code> to add.
+ */
+ public synchronized void addWindowListener(WindowListener listener)
+ {
+ if (listener != null)
+ {
+ newEventsOnly = true;
+ windowListener = AWTEventMulticaster.add(windowListener, listener);
+ }
+ }
+
+ /**
+ * Removes the specified listener from the list of
+ * <code>WindowListeners</code> that will receive events for this window.
+ *
+ * @param listener The <code>WindowListener</code> to remove.
+ */
+ public synchronized void removeWindowListener(WindowListener listener)
+ {
+ windowListener = AWTEventMulticaster.remove(windowListener, listener);
+ }
+
+ /**
+ * Returns an array of all the window listeners registered on this window.
+ *
+ * @since 1.4
+ */
+ public synchronized WindowListener[] getWindowListeners()
+ {
+ return (WindowListener[])
+ AWTEventMulticaster.getListeners(windowListener,
+ WindowListener.class);
+ }
+
+ /**
+ * Returns an array of all the window focus listeners registered on this
+ * window.
+ *
+ * @since 1.4
+ */
+ public synchronized WindowFocusListener[] getWindowFocusListeners()
+ {
+ return (WindowFocusListener[])
+ AWTEventMulticaster.getListeners(windowFocusListener,
+ WindowFocusListener.class);
+ }
+
+ /**
+ * Returns an array of all the window state listeners registered on this
+ * window.
+ *
+ * @since 1.4
+ */
+ public synchronized WindowStateListener[] getWindowStateListeners()
+ {
+ return (WindowStateListener[])
+ AWTEventMulticaster.getListeners(windowStateListener,
+ WindowStateListener.class);
+ }
+
+ /**
+ * Adds the specified listener to this window.
+ */
+ public void addWindowFocusListener (WindowFocusListener wfl)
+ {
+ if (wfl != null)
+ {
+ newEventsOnly = true;
+ windowFocusListener = AWTEventMulticaster.add (windowFocusListener,
+ wfl);
+ }
+ }
+
+ /**
+ * Adds the specified listener to this window.
+ *
+ * @since 1.4
+ */
+ public void addWindowStateListener (WindowStateListener wsl)
+ {
+ if (wsl != null)
+ {
+ newEventsOnly = true;
+ windowStateListener = AWTEventMulticaster.add (windowStateListener,
+ wsl);
+ }
+ }
+
+ /**
+ * Removes the specified listener from this window.
+ */
+ public void removeWindowFocusListener (WindowFocusListener wfl)
+ {
+ windowFocusListener = AWTEventMulticaster.remove (windowFocusListener, wfl);
+ }
+
+ /**
+ * Removes the specified listener from this window.
+ *
+ * @since 1.4
+ */
+ public void removeWindowStateListener (WindowStateListener wsl)
+ {
+ windowStateListener = AWTEventMulticaster.remove (windowStateListener, wsl);
+ }
+
+ /**
+ * Returns an array of all the objects currently registered as FooListeners
+ * upon this Window. FooListeners are registered using the addFooListener
+ * method.
+ *
+ * @exception ClassCastException If listenerType doesn't specify a class or
+ * interface that implements java.util.EventListener.
+ *
+ * @since 1.3
+ */
+ public <T extends EventListener> T[] getListeners(Class<T> listenerType)
+ {
+ if (listenerType == WindowListener.class)
+ return (T[]) getWindowListeners();
+ return super.getListeners(listenerType);
+ }
+
+ void dispatchEventImpl(AWTEvent e)
+ {
+ if (e.getID() == ComponentEvent.COMPONENT_RESIZED)
+ {
+ invalidate();
+ validate();
+ }
+ super.dispatchEventImpl(e);
+ }
+
+ /**
+ * Processes the specified event for this window. If the event is an
+ * instance of <code>WindowEvent</code>, then
+ * <code>processWindowEvent()</code> is called to process the event,
+ * otherwise the superclass version of this method is invoked.
+ *
+ * @param evt The event to process.
+ */
+ protected void processEvent(AWTEvent evt)
+ {
+ if (evt instanceof WindowEvent)
+ {
+ WindowEvent we = (WindowEvent) evt;
+ switch (evt.getID())
+ {
+ case WindowEvent.WINDOW_OPENED:
+ case WindowEvent.WINDOW_CLOSED:
+ case WindowEvent.WINDOW_CLOSING:
+ case WindowEvent.WINDOW_ICONIFIED:
+ case WindowEvent.WINDOW_DEICONIFIED:
+ case WindowEvent.WINDOW_ACTIVATED:
+ case WindowEvent.WINDOW_DEACTIVATED:
+ processWindowEvent(we);
+ break;
+ case WindowEvent.WINDOW_GAINED_FOCUS:
+ case WindowEvent.WINDOW_LOST_FOCUS:
+ processWindowFocusEvent(we);
+ break;
+ case WindowEvent.WINDOW_STATE_CHANGED:
+ processWindowStateEvent(we);
+ break;
+ }
+ }
+ else
+ super.processEvent(evt);
+ }
+
+ /**
+ * Dispatches this event to any listeners that are listening for
+ * <code>WindowEvents</code> on this window. This method only gets
+ * invoked if it is enabled via <code>enableEvents()</code> or if
+ * a listener has been added.
+ *
+ * @param evt The event to process.
+ */
+ protected void processWindowEvent(WindowEvent evt)
+ {
+ if (windowListener != null)
+ {
+ switch (evt.getID())
+ {
+ case WindowEvent.WINDOW_ACTIVATED:
+ windowListener.windowActivated(evt);
+ break;
+ case WindowEvent.WINDOW_CLOSED:
+ windowListener.windowClosed(evt);
+ break;
+ case WindowEvent.WINDOW_CLOSING:
+ windowListener.windowClosing(evt);
+ break;
+ case WindowEvent.WINDOW_DEACTIVATED:
+ windowListener.windowDeactivated(evt);
+ break;
+ case WindowEvent.WINDOW_DEICONIFIED:
+ windowListener.windowDeiconified(evt);
+ break;
+ case WindowEvent.WINDOW_ICONIFIED:
+ windowListener.windowIconified(evt);
+ break;
+ case WindowEvent.WINDOW_OPENED:
+ windowListener.windowOpened(evt);
+ break;
+ }
+ }
+ }
+
+ /**
+ * Identifies if this window is active. The active window is a Frame or
+ * Dialog that has focus or owns the active window.
+ *
+ * @return true if active, else false.
+ * @since 1.4
+ */
+ public boolean isActive()
+ {
+ KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager ();
+ return manager.getActiveWindow() == this;
+ }
+
+ /**
+ * Identifies if this window is focused. A window is focused if it is the
+ * focus owner or it contains the focus owner.
+ *
+ * @return true if focused, else false.
+ * @since 1.4
+ */
+ public boolean isFocused()
+ {
+ KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager ();
+ return manager.getFocusedWindow() == this;
+ }
+
+ /**
+ * Returns the child window that has focus if this window is active.
+ * This method returns <code>null</code> if this window is not active
+ * or no children have focus.
+ *
+ * @return The component that has focus, or <code>null</code> if no
+ * component has focus.
+ */
+ public Component getFocusOwner ()
+ {
+ KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager ();
+
+ Window activeWindow = manager.getActiveWindow ();
+
+ // The currently-focused Component belongs to the active Window.
+ if (activeWindow == this)
+ return manager.getFocusOwner ();
+ else
+ return null;
+ }
+
+ /**
+ * Returns the child component of this window that would receive
+ * focus if this window were to become focused. If the window
+ * already has the top-level focus, then this method returns the
+ * same component as getFocusOwner. If no child component has
+ * requested focus within the window, then the initial focus owner
+ * is returned. If this is a non-focusable window, this method
+ * returns null.
+ *
+ * @return the child component of this window that most recently had
+ * the focus, or <code>null</code>
+ * @since 1.4
+ */
+ public Component getMostRecentFocusOwner ()
+ {
+ return windowFocusOwner;
+ }
+
+ /**
+ * Set the focus owner for this window. This method is used to
+ * remember which component was focused when this window lost
+ * top-level focus, so that when it regains top-level focus the same
+ * child component can be refocused.
+ *
+ * @param windowFocusOwner the component in this window that owns
+ * the focus.
+ */
+ void setFocusOwner (Component windowFocusOwner)
+ {
+ this.windowFocusOwner = windowFocusOwner;
+ }
+
+ /**
+ * Post a Java 1.0 event to the event queue.
+ *
+ * @param e The event to post.
+ *
+ * @deprecated
+ */
+ public boolean postEvent(Event e)
+ {
+ return handleEvent (e);
+ }
+
+ /**
+ * Tests whether or not this window is visible on the screen.
+ *
+ * In contrast to the normal behaviour of Container, which is that
+ * a container is showing if its parent is visible and showing, a Window
+ * is even showing, if its parent (i.e. an invisible Frame) is not showing.
+ *
+ * @return <code>true</code> if this window is visible, <code>false</code>
+ * otherwise.
+ */
+ public boolean isShowing()
+ {
+ return isVisible();
+ }
+
+ public void setLocationRelativeTo(Component c)
+ {
+ int x = 0;
+ int y = 0;
+
+ if (c == null || !c.isShowing())
+ {
+ GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+ Point center = ge.getCenterPoint();
+ x = center.x - (width / 2);
+ y = center.y - (height / 2);
+ }
+ else
+ {
+ int cWidth = c.getWidth();
+ int cHeight = c.getHeight();
+ Dimension screenSize = getToolkit().getScreenSize();
+
+ x = c.getLocationOnScreen().x;
+ y = c.getLocationOnScreen().y;
+
+ // If bottom of component is cut off, window placed
+ // on the left or the right side of component
+ if ((y + cHeight) > screenSize.height)
+ {
+ // If the right side of the component is closer to the center
+ if ((screenSize.width / 2 - x) <= 0)
+ {
+ if ((x - width) >= 0)
+ x -= width;
+ else
+ x = 0;
+ }
+ else
+ {
+ if ((x + cWidth + width) <= screenSize.width)
+ x += cWidth;
+ else
+ x = screenSize.width - width;
+ }
+
+ y = screenSize.height - height;
+ }
+ else if (cWidth > width || cHeight > height)
+ {
+ // If right side of component is cut off
+ if ((x + width) > screenSize.width)
+ x = screenSize.width - width;
+ // If left side of component is cut off
+ else if (x < 0)
+ x = 0;
+ else
+ x += (cWidth - width) / 2;
+
+ y += (cHeight - height) / 2;
+ }
+ else
+ {
+ // If right side of component is cut off
+ if ((x + width) > screenSize.width)
+ x = screenSize.width - width;
+ // If left side of component is cut off
+ else if (x < 0 || (x - (width - cWidth) / 2) < 0)
+ x = 0;
+ else
+ x -= (width - cWidth) / 2;
+
+ if ((y - (height - cHeight) / 2) > 0)
+ y -= (height - cHeight) / 2;
+ else
+ y = 0;
+ }
+ }
+
+ setLocation(x, y);
+ }
+
+ /**
+ * A BltBufferStrategy for windows.
+ */
+ private class WindowBltBufferStrategy extends BltBufferStrategy
+ {
+ /**
+ * Creates a block transfer strategy for this window.
+ *
+ * @param numBuffers the number of buffers in this strategy
+ * @param accelerated true if the buffer should be accelerated,
+ * false otherwise
+ */
+ WindowBltBufferStrategy(int numBuffers, boolean accelerated)
+ {
+ super(numBuffers,
+ new BufferCapabilities(new ImageCapabilities(accelerated),
+ new ImageCapabilities(accelerated),
+ BufferCapabilities.FlipContents.COPIED));
+ }
+ }
+
+ /**
+ * A FlipBufferStrategy for windows.
+ */
+ private class WindowFlipBufferStrategy extends FlipBufferStrategy
+ {
+ /**
+ * Creates a flip buffer strategy for this window.
+ *
+ * @param numBuffers the number of buffers in this strategy
+ *
+ * @throws AWTException if the requested number of buffers is not
+ * supported
+ */
+ WindowFlipBufferStrategy(int numBuffers)
+ throws AWTException
+ {
+ super(numBuffers,
+ new BufferCapabilities(new ImageCapabilities(true),
+ new ImageCapabilities(true),
+ BufferCapabilities.FlipContents.COPIED));
+ }
+ }
+
+ /**
+ * Creates a buffering strategy that manages how this window is
+ * repainted. This method attempts to create the optimum strategy
+ * based on the desired number of buffers. Hardware or software
+ * acceleration may be used.
+ *
+ * createBufferStrategy attempts different levels of optimization,
+ * but guarantees that some strategy with the requested number of
+ * buffers will be created even if it is not optimal. First it
+ * attempts to create a page flipping strategy, then an accelerated
+ * blitting strategy, then an unaccelerated blitting strategy.
+ *
+ * Calling this method causes any existing buffer strategy to be
+ * destroyed.
+ *
+ * @param numBuffers the number of buffers in this strategy
+ *
+ * @throws IllegalArgumentException if requested number of buffers
+ * is less than one
+ * @throws IllegalStateException if this window is not displayable
+ *
+ * @since 1.4
+ */
+ public void createBufferStrategy(int numBuffers)
+ {
+ if (numBuffers < 1)
+ throw new IllegalArgumentException("Window.createBufferStrategy: number"
+ + " of buffers is less than one");
+
+ if (!isDisplayable())
+ throw new IllegalStateException("Window.createBufferStrategy: window is"
+ + " not displayable");
+
+ BufferStrategy newStrategy = null;
+
+ // try a flipping strategy
+ try
+ {
+ newStrategy = new WindowFlipBufferStrategy(numBuffers);
+ }
+ catch (AWTException e)
+ {
+ }
+
+ // fall back to an accelerated blitting strategy
+ if (newStrategy == null)
+ newStrategy = new WindowBltBufferStrategy(numBuffers, true);
+
+ bufferStrategy = newStrategy;
+ }
+
+ /**
+ * Creates a buffering strategy that manages how this window is
+ * repainted. This method attempts to create a strategy based on
+ * the specified capabilities and throws an exception if the
+ * requested strategy is not supported.
+ *
+ * Calling this method causes any existing buffer strategy to be
+ * destroyed.
+ *
+ * @param numBuffers the number of buffers in this strategy
+ * @param caps the requested buffering capabilities
+ *
+ * @throws AWTException if the requested capabilities are not
+ * supported
+ * @throws IllegalArgumentException if requested number of buffers
+ * is less than one or if caps is null
+ *
+ * @since 1.4
+ */
+ public void createBufferStrategy(int numBuffers, BufferCapabilities caps)
+ throws AWTException
+ {
+ if (numBuffers < 1)
+ throw new IllegalArgumentException("Window.createBufferStrategy: number"
+ + " of buffers is less than one");
+
+ if (caps == null)
+ throw new IllegalArgumentException("Window.createBufferStrategy:"
+ + " capabilities object is null");
+
+ // a flipping strategy was requested
+ if (caps.isPageFlipping())
+ bufferStrategy = new WindowFlipBufferStrategy(numBuffers);
+ else
+ bufferStrategy = new WindowBltBufferStrategy(numBuffers, true);
+ }
+
+ /**
+ * Returns the buffer strategy used by the window.
+ *
+ * @return the buffer strategy.
+ * @since 1.4
+ */
+ public BufferStrategy getBufferStrategy()
+ {
+ return bufferStrategy;
+ }
+
+ /**
+ * @since 1.2
+ *
+ * @deprecated replaced by Component.applyComponentOrientation.
+ */
+ public void applyResourceBundle(ResourceBundle rb)
+ {
+ applyComponentOrientation(ComponentOrientation.getOrientation(rb));
+ }
+
+ /**
+ * @since 1.2
+ *
+ * @deprecated
+ */
+ public void applyResourceBundle(String rbName)
+ {
+ ResourceBundle rb = ResourceBundle.getBundle(rbName, Locale.getDefault(),
+ ClassLoader.getSystemClassLoader());
+ if (rb != null)
+ applyResourceBundle(rb);
+ }
+
+ /**
+ * Gets the AccessibleContext associated with this <code>Window</code>.
+ * The context is created, if necessary.
+ *
+ * @return the associated context
+ */
+ public AccessibleContext getAccessibleContext()
+ {
+ /* Create the context if this is the first request */
+ if (accessibleContext == null)
+ accessibleContext = new AccessibleAWTWindow();
+ return accessibleContext;
+ }
+
+ /**
+ * Get graphics configuration. The implementation for Window will
+ * not ask any parent containers, since Window is a toplevel
+ * window and not actually embedded in the parent component.
+ */
+ public GraphicsConfiguration getGraphicsConfiguration()
+ {
+ GraphicsConfiguration conf = graphicsConfig;
+ if (conf == null)
+ {
+ conf = GraphicsEnvironment.getLocalGraphicsEnvironment()
+ .getDefaultScreenDevice().getDefaultConfiguration();
+ graphicsConfig = conf;
+ }
+ return conf;
+ }
+
+ protected void processWindowFocusEvent(WindowEvent event)
+ {
+ if (windowFocusListener != null)
+ {
+ switch (event.getID ())
+ {
+ case WindowEvent.WINDOW_GAINED_FOCUS:
+ windowFocusListener.windowGainedFocus (event);
+ break;
+
+ case WindowEvent.WINDOW_LOST_FOCUS:
+ windowFocusListener.windowLostFocus (event);
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ /**
+ * @since 1.4
+ */
+ protected void processWindowStateEvent(WindowEvent event)
+ {
+ if (windowStateListener != null
+ && event.getID () == WindowEvent.WINDOW_STATE_CHANGED)
+ windowStateListener.windowStateChanged (event);
+ }
+
+ /**
+ * Returns whether this <code>Window</code> can get the focus or not.
+ *
+ * @since 1.4
+ */
+ public final boolean isFocusableWindow ()
+ {
+ if (getFocusableWindowState () == false)
+ return false;
+
+ if (this instanceof Dialog
+ || this instanceof Frame)
+ return true;
+
+ // FIXME: Implement more possible cases for returning true.
+
+ return false;
+ }
+
+ /**
+ * Returns the value of the focusableWindowState property.
+ *
+ * @since 1.4
+ */
+ public boolean getFocusableWindowState ()
+ {
+ return focusableWindowState;
+ }
+
+ /**
+ * Sets the value of the focusableWindowState property.
+ *
+ * @since 1.4
+ */
+ public void setFocusableWindowState (boolean focusableWindowState)
+ {
+ this.focusableWindowState = focusableWindowState;
+ }
+
+ /**
+ * Check whether this Container is a focus cycle root.
+ * Returns always <code>true</code> as Windows are the
+ * root of the focus cycle.
+ *
+ * @return Always <code>true</code>.
+ *
+ * @since 1.4
+ */
+ public final boolean isFocusCycleRoot()
+ {
+ return true;
+ }
+
+ /**
+ * Set whether or not this Container is the root of a focus
+ * traversal cycle. Windows are the root of the focus cycle
+ * and therefore this method does nothing.
+ *
+ * @param focusCycleRoot ignored.
+ *
+ * @since 1.4
+ */
+ public final void setFocusCycleRoot(boolean focusCycleRoot)
+ {
+ // calls to the method are ignored
+ }
+
+ /**
+ * Returns the root container that owns the focus cycle where this
+ * component resides. Windows have no ancestors and this method
+ * returns always <code>null</code>.
+ *
+ * @return Always <code>null</code>.
+ * @since 1.4
+ */
+ public final Container getFocusCycleRootAncestor()
+ {
+ return null;
+ }
+
+ /**
+ * Returns whether the Windows is an always-on-top window,
+ * meaning whether the window can be obscured by other windows or not.
+ *
+ * @return <code>true</code> if the windows is always-on-top,
+ * <code>false</code> otherwise.
+ * @since 1.5
+ */
+ public final boolean isAlwaysOnTop()
+ {
+ return alwaysOnTop;
+ }
+
+ /**
+ * Sets the always-on-top state of this window (if supported).
+ *
+ * Setting a window to always-on-top means it will not be obscured
+ * by any other windows (with the exception of other always-on-top
+ * windows). Not all platforms may support this.
+ *
+ * If an window's always-on-top status is changed to false, the window
+ * will remain at the front but not be anchored there.
+ *
+ * Calling toBack() on an always-on-top window will change its
+ * always-on-top status to false.
+ *
+ * @since 1.5
+ */
+ public final void setAlwaysOnTop(boolean alwaysOnTop)
+ {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null)
+ sm.checkPermission( new AWTPermission("setWindowAlwaysOnTop") );
+
+ if( this.alwaysOnTop == alwaysOnTop )
+ return;
+
+ if( alwaysOnTop )
+ toFront();
+
+ firePropertyChange("alwaysOnTop", this.alwaysOnTop, alwaysOnTop );
+ this.alwaysOnTop = alwaysOnTop;
+
+ if (peer != null)
+ ( (WindowPeer) peer).updateAlwaysOnTop();
+ else
+ System.out.println("Null peer?!");
+ }
+
+ /**
+ * Generate a unique name for this window.
+ *
+ * @return A unique name for this window.
+ */
+ String generateName()
+ {
+ return "win" + getUniqueLong();
+ }
+
+ /**
+ * Overridden to handle WindowEvents.
+ *
+ * @return <code>true</code> when the specified event type is enabled,
+ * <code>false</code> otherwise
+ */
+ boolean eventTypeEnabled(int type)
+ {
+ boolean enabled = false;
+ switch (type)
+ {
+ case WindowEvent.WINDOW_OPENED:
+ case WindowEvent.WINDOW_CLOSED:
+ case WindowEvent.WINDOW_CLOSING:
+ case WindowEvent.WINDOW_ICONIFIED:
+ case WindowEvent.WINDOW_DEICONIFIED:
+ case WindowEvent.WINDOW_ACTIVATED:
+ case WindowEvent.WINDOW_DEACTIVATED:
+ enabled = ((eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0)
+ || windowListener != null;
+ break;
+ case WindowEvent.WINDOW_GAINED_FOCUS:
+ case WindowEvent.WINDOW_LOST_FOCUS:
+ enabled = ((eventMask & AWTEvent.WINDOW_FOCUS_EVENT_MASK) != 0)
+ || windowFocusListener != null;
+ break;
+ case WindowEvent.WINDOW_STATE_CHANGED:
+ enabled = ((eventMask & AWTEvent.WINDOW_STATE_EVENT_MASK) != 0)
+ || windowStateListener != null;
+ break;
+ default:
+ enabled = super.eventTypeEnabled(type);
+ }
+ return enabled;
+ }
+
+ private static synchronized long getUniqueLong()
+ {
+ return next_window_number++;
+ }
+}