/*
* Copyright ( c ) 1995 , 2021 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation . Oracle designates this
* particular file as subject to the " Classpath " exception as provided
* by Oracle in the LICENSE file that accompanied this code .
*
* This code 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
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
package java.awt;
import java.awt.event.KeyEvent;
import java.awt.event.WindowEvent;
import java.awt.peer.FramePeer;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serial;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Vector;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleRole;
import javax.accessibility.AccessibleState;
import javax.accessibility.AccessibleStateSet;
import sun.awt.AWTAccessor;
import sun.awt.SunToolkit;
/**
* A { @ code Frame } is a top - level window with a title and a border .
* < p >
* The size of the frame includes any area designated for the
* border . The dimensions of the border area may be obtained
* using the { @ code getInsets } method , however , since
* these dimensions are platform - dependent , a valid insets
* value cannot be obtained until the frame is made displayable
* by either calling { @ code pack } or { @ code show } .
* Since the border area is included in the overall size of the
* frame , the border effectively obscures a portion of the frame ,
* constraining the area available for rendering and / or displaying
* subcomponents to the rectangle which has an upper - left corner
* location of { @ code ( insets . left , insets . top ) } , and has a size of
* { @ code width - ( insets . left + insets . right ) } by
* { @ code height - ( insets . top + insets . bottom ) } .
* < p >
* The default layout for a frame is { @ code BorderLayout } .
* < p >
* A frame may have its native decorations ( i . e . { @ code Frame }
* and { @ code Titlebar } ) turned off
* with { @ code setUndecorated } . This can only be done while the frame
* is not { @ link Component # isDisplayable ( ) displayable } .
* < p >
* In a multi - screen environment , you can create a { @ code Frame }
* on a different screen device by constructing the { @ code Frame }
* with { @ link # Frame ( GraphicsConfiguration ) } or
* { @ link # Frame ( String title , GraphicsConfiguration ) } . The
* { @ code GraphicsConfiguration } object is one of the
* { @ code GraphicsConfiguration } objects of the target screen
* device .
* < p >
* In a virtual device multi - screen environment in which the desktop
* area could span multiple physical screen devices , the bounds of all
* configurations are relative to the virtual - coordinate system . The
* origin of the virtual - coordinate system is at the upper left - hand
* corner of the primary physical screen . Depending on the location
* of the primary screen in the virtual device , negative coordinates
* are possible , as shown in the following figure .
* < p >
* < img src = " doc - files / MultiScreen . gif " alt = " Diagram of virtual device
* encompassing three physical screens and one primary physical screen . The
* primary physical screen shows ( 0 , 0 ) coords while a different physical screen
* shows ( - 80 , - 100 ) coords . " style = " margin : 7 px 10 px ; " >
* < p >
* In such an environment , when calling { @ code setLocation } ,
* you must pass a virtual coordinate to this method . Similarly ,
* calling { @ code getLocationOnScreen } on a { @ code Frame }
* returns virtual device coordinates . Call the { @ code getBounds }
* method of a { @ code GraphicsConfiguration } to find its origin in
* the virtual coordinate system .
* < p >
* The following code sets the
* location of the { @ code Frame } at ( 10 , 10 ) relative
* to the origin of the physical screen of the corresponding
* { @ code GraphicsConfiguration } . If the bounds of the
* { @ code GraphicsConfiguration } is not taken into account , the
* { @ code Frame } location would be set at ( 10 , 10 ) relative to the
* virtual - coordinate system and would appear on the primary physical
* screen , which might be different from the physical screen of the
* specified { @ code GraphicsConfiguration } .
*
* < pre >
* Frame f = new Frame ( GraphicsConfiguration gc ) ;
* Rectangle bounds = gc . getBounds ( ) ;
* f . setLocation ( 10 + bounds . x , 10 + bounds . y ) ;
* < / pre >
*
* < p >
* Frames are capable of generating the following types of
* { @ code WindowEvent } s :
* < ul >
* < li > { @ code WINDOW_OPENED }
* < li > { @ code WINDOW_CLOSING } :
* < br > If the program doesn ' t
* explicitly hide or dispose the window while processing
* this event , the window close operation is canceled .
* < li > { @ code WINDOW_CLOSED }
* < li > { @ code WINDOW_ICONIFIED }
* < li > { @ code WINDOW_DEICONIFIED }
* < li > { @ code WINDOW_ACTIVATED }
* < li > { @ code WINDOW_DEACTIVATED }
* < li > { @ code WINDOW_GAINED_FOCUS }
* < li > { @ code WINDOW_LOST_FOCUS }
* < li > { @ code WINDOW_STATE_CHANGED }
* < / ul >
*
* @ author Sami Shaio
* @ see WindowEvent
* @ see Window # addWindowListener
* @ since 1 . 0
*/
public class Frame extends Window implements MenuContainer {
/* Note: These are being obsoleted; programs should use the Cursor class
* variables going forward . See Cursor and Component . setCursor .
*/
/**
* @ deprecated replaced by { @ code Cursor . DEFAULT_CURSOR } .
*/
@Deprecated
public static final int DEFAULT_CURSOR = Cursor.DEFAULT_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . CROSSHAIR_CURSOR } .
*/
@Deprecated
public static final int CROSSHAIR_CURSOR = Cursor.CROSSHAIR_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . TEXT_CURSOR } .
*/
@Deprecated
public static final int TEXT_CURSOR = Cursor.TEXT_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . WAIT_CURSOR } .
*/
@Deprecated
public static final int WAIT_CURSOR = Cursor.WAIT_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . SW_RESIZE_CURSOR } .
*/
@Deprecated
public static final int SW_RESIZE_CURSOR = Cursor.SW_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . SE_RESIZE_CURSOR } .
*/
@Deprecated
public static final int SE_RESIZE_CURSOR = Cursor.SE_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . NW_RESIZE_CURSOR } .
*/
@Deprecated
public static final int NW_RESIZE_CURSOR = Cursor.NW_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . NE_RESIZE_CURSOR } .
*/
@Deprecated
public static final int NE_RESIZE_CURSOR = Cursor.NE_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . N_RESIZE_CURSOR } .
*/
@Deprecated
public static final int N_RESIZE_CURSOR = Cursor.N_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . S_RESIZE_CURSOR } .
*/
@Deprecated
public static final int S_RESIZE_CURSOR = Cursor.S_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . W_RESIZE_CURSOR } .
*/
@Deprecated
public static final int W_RESIZE_CURSOR = Cursor.W_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . E_RESIZE_CURSOR } .
*/
@Deprecated
public static final int E_RESIZE_CURSOR = Cursor.E_RESIZE_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . HAND_CURSOR } .
*/
@Deprecated
public static final int HAND_CURSOR = Cursor.HAND_CURSOR;
/**
* @ deprecated replaced by { @ code Cursor . MOVE_CURSOR } .
*/
@Deprecated
public static final int MOVE_CURSOR = Cursor.MOVE_CURSOR;
/**
* Frame is in the " normal " state . This symbolic constant names a
* frame state with all state bits cleared .
* @ see # setExtendedState ( int )
* @ see # getExtendedState
*/
public static final int NORMAL = 0 ;
/**
* This state bit indicates that frame is iconified .
* @ see # setExtendedState ( int )
* @ see # getExtendedState
*/
public static final int ICONIFIED = 1 ;
/**
* This state bit indicates that frame is maximized in the
* horizontal direction .
* @ see # setExtendedState ( int )
* @ see # getExtendedState
* @ since 1 . 4
*/
public static final int MAXIMIZED_HORIZ = 2 ;
/**
* This state bit indicates that frame is maximized in the
* vertical direction .
* @ see # setExtendedState ( int )
* @ see # getExtendedState
* @ since 1 . 4
*/
public static final int MAXIMIZED_VERT = 4 ;
/**
* This state bit mask indicates that frame is fully maximized
* ( that is both horizontally and vertically ) . It is just a
* convenience alias for
* < code > MAXIMIZED_VERT & nbsp ; | & nbsp ; MAXIMIZED_HORIZ < / code > .
*
* < p > Note that the correct test for frame being fully maximized is
* < pre >
* ( state & amp ; Frame . MAXIMIZED_BOTH ) = = Frame . MAXIMIZED_BOTH
* < / pre >
*
* < p > To test is frame is maximized in < em > some < / em > direction use
* < pre >
* ( state & amp ; Frame . MAXIMIZED_BOTH ) ! = 0
* < / pre >
*
* @ see # setExtendedState ( int )
* @ see # getExtendedState
* @ since 1 . 4
*/
public static final int MAXIMIZED_BOTH = MAXIMIZED_VERT | MAXIMIZED_HORIZ;
/**
* Maximized bounds for this frame .
* @ see # setMaximizedBounds ( Rectangle )
* @ see # getMaximizedBounds
* @ serial
* @ since 1 . 4
*/
Rectangle maximizedBounds;
/**
* This is the title of the frame . It can be changed
* at any time . { @ code title } can be null and if
* this is the case the { @ code title } = " " .
*
* @ serial
* @ see # getTitle
* @ see # setTitle ( String )
*/
String title = "Untitled" ;
/**
* The frames menubar . If { @ code menuBar } = null
* the frame will not have a menubar .
*
* @ serial
* @ see # getMenuBar
* @ see # setMenuBar ( MenuBar )
*/
MenuBar menuBar;
/**
* This field indicates whether the frame is resizable .
* This property can be changed at any time .
* { @ code resizable } will be true if the frame is
* resizable , otherwise it will be false .
*
* @ serial
* @ see # isResizable ( )
*/
boolean resizable = true ;
/**
* This field indicates whether the frame is undecorated .
* This property can only be changed while the frame is not displayable .
* { @ code undecorated } will be true if the frame is
* undecorated , otherwise it will be false .
*
* @ serial
* @ see # setUndecorated ( boolean )
* @ see # isUndecorated ( )
* @ see Component # isDisplayable ( )
* @ since 1 . 4
*/
boolean undecorated = false ;
/**
* { @ code mbManagement } is only used by the Motif implementation .
*
* @ serial
*/
boolean mbManagement = false ; /* used only by the Motif impl. */
/**
* The bitwise mask of frame state constants .
*/
// XXX: uwe: abuse old field for now
// will need to take care of serialization
private int state = NORMAL;
/**
* The Windows owned by the Frame .
* Note : in 1 . 2 this has been superseded by Window . ownedWindowList
*
* @ serial
* @ see java . awt . Window # ownedWindowList
*/
Vector<Window> ownedWindows;
private static final String base = "frame" ;
private static int nameCounter = 0 ;
/**
* Use serialVersionUID from JDK 1 . 1 for interoperability .
*/
@Serial
private static final long serialVersionUID = 2673458971256075116 L;
static {
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
if (!GraphicsEnvironment.isHeadless()) {
initIDs();
}
}
/**
* Constructs a new instance of { @ code Frame } that is
* initially invisible . The title of the { @ code Frame }
* is empty .
* @ throws HeadlessException when
* { @ code GraphicsEnvironment . isHeadless ( ) } returns { @ code true }
* @ see java . awt . GraphicsEnvironment # isHeadless ( )
* @ see Component # setSize
* @ see Component # setVisible ( boolean )
*/
public Frame() throws HeadlessException {
this ("" );
}
/**
* Constructs a new , initially invisible { @ code Frame } with the
* specified { @ code GraphicsConfiguration } .
*
* @ param gc the { @ code GraphicsConfiguration }
* of the target screen device . If { @ code gc }
* is { @ code null } , the system default
* { @ code GraphicsConfiguration } is assumed .
* @ throws IllegalArgumentException if
* { @ code gc } is not from a screen device .
* @ throws HeadlessException when
* { @ code GraphicsEnvironment . isHeadless ( ) } returns { @ code true }
* @ see java . awt . GraphicsEnvironment # isHeadless ( )
* @ since 1 . 3
*/
public Frame(GraphicsConfiguration gc) {
this ("" , gc);
}
/**
* Constructs a new , initially invisible { @ code Frame } object
* with the specified title .
* @ param title the title to be displayed in the frame ' s border .
* A { @ code null } value
* is treated as an empty string , " " .
* @ throws HeadlessException when
* { @ code GraphicsEnvironment . isHeadless ( ) } returns { @ code true }
* @ see java . awt . GraphicsEnvironment # isHeadless ( )
* @ see java . awt . Component # setSize
* @ see java . awt . Component # setVisible ( boolean )
* @ see java . awt . GraphicsConfiguration # getBounds
*/
public Frame(String title) throws HeadlessException {
init(title, null );
}
/**
* Constructs a new , initially invisible { @ code Frame } object
* with the specified title and a
* { @ code GraphicsConfiguration } .
* @ param title the title to be displayed in the frame ' s border .
* A { @ code null } value
* is treated as an empty string , " " .
* @ param gc the { @ code GraphicsConfiguration }
* of the target screen device . If { @ code gc } is
* { @ code null } , the system default
* { @ code GraphicsConfiguration } is assumed .
* @ throws IllegalArgumentException if { @ code gc }
* is not from a screen device .
* @ throws HeadlessException when
* { @ code GraphicsEnvironment . isHeadless ( ) } returns { @ code true }
* @ see java . awt . GraphicsEnvironment # isHeadless ( )
* @ see java . awt . Component # setSize
* @ see java . awt . Component # setVisible ( boolean )
* @ see java . awt . GraphicsConfiguration # getBounds
* @ since 1 . 3
*/
public Frame(String title, GraphicsConfiguration gc) {
super (gc);
init(title, gc);
}
private void init(String title, GraphicsConfiguration gc) {
this .title = title;
SunToolkit.checkAndSetPolicy(this );
}
/**
* Construct a name for this component . Called by getName ( ) when the
* name is null .
*/
String constructComponentName() {
synchronized (Frame.class ) {
return base + nameCounter++;
}
}
/**
* Makes this Frame displayable by connecting it to
* a native screen resource . Making a frame displayable will
* cause any of its children to be made displayable .
* This method is called internally by the toolkit and should
* not be called directly by programs .
* @ see Component # isDisplayable
* @ see # removeNotify
*/
public void addNotify() {
synchronized (getTreeLock()) {
if (peer == null ) {
peer = getComponentFactory().createFrame(this );
}
FramePeer p = (FramePeer)peer;
MenuBar menuBar = this .menuBar;
if (menuBar != null ) {
mbManagement = true ;
menuBar.addNotify();
p.setMenuBar(menuBar);
}
p.setMaximizedBounds(maximizedBounds);
super .addNotify();
}
}
/**
* Gets the title of the frame . The title is displayed in the
* frame ' s border .
* @ return the title of this frame , or an empty string ( " " )
* if this frame doesn ' t have a title .
* @ see # setTitle ( String )
*/
public String getTitle() {
return title;
}
/**
* Sets the title for this frame to the specified string .
* @ param title the title to be displayed in the frame ' s border .
* A { @ code null } value
* is treated as an empty string , " " .
* @ see # getTitle
*/
public void setTitle(String title) {
String oldTitle = this .title;
if (title == null ) {
title = "" ;
}
synchronized (this ) {
this .title = title;
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
peer.setTitle(title);
}
}
firePropertyChange("title" , oldTitle, title);
}
/**
* Returns the image to be displayed as the icon for this frame .
* < p >
* This method is obsolete and kept for backward compatibility
* only . Use { @ link Window # getIconImages Window . getIconImages ( ) } instead .
* < p >
* If a list of several images was specified as a Window ' s icon ,
* this method will return the first item of the list .
*
* @ return the icon image for this frame , or { @ code null }
* if this frame doesn ' t have an icon image .
* @ see # setIconImage ( Image )
* @ see Window # getIconImages ( )
* @ see Window # setIconImages
*/
public Image getIconImage() {
java.util.List<Image> icons = this .icons;
if (icons != null ) {
if (icons.size() > 0 ) {
return icons.get(0 );
}
}
return null ;
}
/**
* { @ inheritDoc }
*/
public void setIconImage(Image image) {
super .setIconImage(image);
}
/**
* Gets the menu bar for this frame .
* @ return the menu bar for this frame , or { @ code null }
* if this frame doesn ' t have a menu bar .
* @ see # setMenuBar ( MenuBar )
*/
public MenuBar getMenuBar() {
return menuBar;
}
/**
* Sets the menu bar for this frame to the specified menu bar .
* @ param mb the menu bar being set .
* If this parameter is { @ code null } then any
* existing menu bar on this frame is removed .
* @ see # getMenuBar
*/
public void setMenuBar(MenuBar mb) {
synchronized (getTreeLock()) {
if (menuBar == mb) {
return ;
}
if ((mb != null ) && (mb.parent != null )) {
mb.parent.remove(mb);
}
if (menuBar != null ) {
remove(menuBar);
}
menuBar = mb;
if (menuBar != null ) {
menuBar.parent = this ;
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
mbManagement = true ;
menuBar.addNotify();
invalidateIfValid();
peer.setMenuBar(menuBar);
}
}
}
}
/**
* Indicates whether this frame is resizable by the user .
* By default , all frames are initially resizable .
* @ return { @ code true } if the user can resize this frame ;
* { @ code false } otherwise .
* @ see java . awt . Frame # setResizable ( boolean )
*/
public boolean isResizable() {
return resizable;
}
/**
* Sets whether this frame is resizable by the user .
* @ param resizable { @ code true } if this frame is resizable ;
* { @ code false } otherwise .
* @ see java . awt . Frame # isResizable
*/
public void setResizable(boolean resizable) {
boolean oldResizable = this .resizable;
boolean testvalid = false ;
synchronized (this ) {
this .resizable = resizable;
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
peer.setResizable(resizable);
testvalid = true ;
}
}
// On some platforms, changing the resizable state affects
// the insets of the Frame. If we could, we'd call invalidate()
// from the peer, but we need to guarantee that we're not holding
// the Frame lock when we call invalidate().
if (testvalid) {
invalidateIfValid();
}
firePropertyChange("resizable" , oldResizable, resizable);
}
/**
* Sets the state of this frame ( obsolete ) .
* < p >
* In older versions of JDK a frame state could only be NORMAL or
* ICONIFIED . Since JDK 1 . 4 set of supported frame states is
* expanded and frame state is represented as a bitwise mask .
* < p >
* For compatibility with applications developed
* earlier this method still accepts
* { @ code Frame . NORMAL } and
* { @ code Frame . ICONIFIED } only . The iconic
* state of the frame is only changed , other aspects
* of frame state are not affected by this method . If
* the state passed to this method is neither { @ code
* Frame . NORMAL } nor { @ code Frame . ICONIFIED } the
* method performs no actions at all .
* < p > Note that if the state is not supported on a
* given platform , neither the state nor the return
* value of the { @ link # getState } method will be
* changed . The application may determine whether a
* specific state is supported via the { @ link
* java . awt . Toolkit # isFrameStateSupported } method .
* < p > < b > If the frame is currently visible on the
* screen < / b > ( the { @ link # isShowing } method returns
* { @ code true } ) , the developer should examine the
* return value of the { @ link
* java . awt . event . WindowEvent # getNewState } method of
* the { @ code WindowEvent } received through the
* { @ link java . awt . event . WindowStateListener } to
* determine that the state has actually been
* changed .
* < p > < b > If the frame is not visible on the
* screen < / b > , the events may or may not be
* generated . In this case the developer may assume
* that the state changes immediately after this
* method returns . Later , when the { @ code
* setVisible ( true ) } method is invoked , the frame
* will attempt to apply this state . Receiving any
* { @ link
* java . awt . event . WindowEvent # WINDOW_STATE_CHANGED }
* events is not guaranteed in this case also .
*
* @ param state either { @ code Frame . NORMAL } or
* { @ code Frame . ICONIFIED } .
* @ see # setExtendedState ( int )
* @ see java . awt . Window # addWindowStateListener
*/
public synchronized void setState(int state) {
int current = getExtendedState();
if (state == ICONIFIED && (current & ICONIFIED) == 0 ) {
setExtendedState(current | ICONIFIED);
}
else if (state == NORMAL && (current & ICONIFIED) != 0 ) {
setExtendedState(current & ~ICONIFIED);
}
}
/**
* Sets the state of this frame . The state is
* represented as a bitwise mask .
* < ul >
* < li > { @ code NORMAL }
* < br > Indicates that no state bits are set .
* < li > { @ code ICONIFIED }
* < li > { @ code MAXIMIZED_HORIZ }
* < li > { @ code MAXIMIZED_VERT }
* < li > { @ code MAXIMIZED_BOTH }
* < br > Concatenates { @ code MAXIMIZED_HORIZ }
* and { @ code MAXIMIZED_VERT } .
* < / ul >
* < p > Note that if the state is not supported on a
* given platform , neither the state nor the return
* value of the { @ link # getExtendedState } method will
* be changed . The application may determine whether
* a specific state is supported via the { @ link
* java . awt . Toolkit # isFrameStateSupported } method .
* < p > < b > If the frame is currently visible on the
* screen < / b > ( the { @ link # isShowing } method returns
* { @ code true } ) , the developer should examine the
* return value of the { @ link
* java . awt . event . WindowEvent # getNewState } method of
* the { @ code WindowEvent } received through the
* { @ link java . awt . event . WindowStateListener } to
* determine that the state has actually been
* changed .
* < p > < b > If the frame is not visible on the
* screen < / b > , the events may or may not be
* generated . In this case the developer may assume
* that the state changes immediately after this
* method returns . Later , when the { @ code
* setVisible ( true ) } method is invoked , the frame
* will attempt to apply this state . Receiving any
* { @ link
* java . awt . event . WindowEvent # WINDOW_STATE_CHANGED }
* events is not guaranteed in this case also .
*
* @ param state a bitwise mask of frame state constants
* @ since 1 . 4
* @ see java . awt . Window # addWindowStateListener
*/
public void setExtendedState(int state) {
if ( !isFrameStateSupported( state ) ) {
return ;
}
synchronized (getObjectLock()) {
this .state = state;
}
// peer.setState must be called outside of object lock
// synchronization block to avoid possible deadlock
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
peer.setState(state);
}
}
private boolean isFrameStateSupported(int state) {
if ( !getToolkit().isFrameStateSupported( state ) ) {
// * Toolkit.isFrameStateSupported returns always false
// on compound state even if all parts are supported;
// * if part of state is not supported, state is not supported;
// * MAXIMIZED_BOTH is not a compound state.
if ( ((state & ICONIFIED) != 0 ) &&
!getToolkit().isFrameStateSupported( ICONIFIED )) {
return false ;
}else {
state &= ~ICONIFIED;
}
return getToolkit().isFrameStateSupported( state );
}
return true ;
}
/**
* Gets the state of this frame ( obsolete ) .
* < p >
* In older versions of JDK a frame state could only be NORMAL or
* ICONIFIED . Since JDK 1 . 4 set of supported frame states is
* expanded and frame state is represented as a bitwise mask .
* < p >
* For compatibility with old programs this method still returns
* { @ code Frame . NORMAL } and { @ code Frame . ICONIFIED } but
* it only reports the iconic state of the frame , other aspects of
* frame state are not reported by this method .
*
* @ return { @ code Frame . NORMAL } or { @ code Frame . ICONIFIED } .
* @ see # setState ( int )
* @ see # getExtendedState
*/
public synchronized int getState() {
return (getExtendedState() & ICONIFIED) != 0 ? ICONIFIED : NORMAL;
}
/**
* Gets the state of this frame . The state is
* represented as a bitwise mask .
* < ul >
* < li > { @ code NORMAL }
* < br > Indicates that no state bits are set .
* < li > { @ code ICONIFIED }
* < li > { @ code MAXIMIZED_HORIZ }
* < li > { @ code MAXIMIZED_VERT }
* < li > { @ code MAXIMIZED_BOTH }
* < br > Concatenates { @ code MAXIMIZED_HORIZ }
* and { @ code MAXIMIZED_VERT } .
* < / ul >
*
* @ return a bitwise mask of frame state constants
* @ see # setExtendedState ( int )
* @ since 1 . 4
*/
public int getExtendedState() {
synchronized (getObjectLock()) {
return state;
}
}
static {
AWTAccessor.setFrameAccessor(
new AWTAccessor.FrameAccessor() {
public void setExtendedState(Frame frame, int state) {
synchronized (frame.getObjectLock()) {
frame.state = state;
}
}
public int getExtendedState(Frame frame) {
synchronized (frame.getObjectLock()) {
return frame.state;
}
}
public Rectangle getMaximizedBounds(Frame frame) {
synchronized (frame.getObjectLock()) {
return frame.maximizedBounds;
}
}
}
);
}
/**
* Sets the maximized bounds for this frame .
* < p >
* When a frame is in maximized state the system supplies some
* defaults bounds . This method allows some or all of those
* system supplied values to be overridden .
* < p >
* If { @ code bounds } is { @ code null } , accept bounds
* supplied by the system . If non - { @ code null } you can
* override some of the system supplied values while accepting
* others by setting those fields you want to accept from system
* to { @ code Integer . MAX_VALUE } .
* < p >
* Note , the given maximized bounds are used as a hint for the native
* system , because the underlying platform may not support setting the
* location and / or size of the maximized windows . If that is the case , the
* provided values do not affect the appearance of the frame in the
* maximized state .
*
* @ param bounds bounds for the maximized state
* @ see # getMaximizedBounds ( )
* @ since 1 . 4
*/
public void setMaximizedBounds(Rectangle bounds) {
synchronized (getObjectLock()) {
this .maximizedBounds = bounds;
}
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
peer.setMaximizedBounds(bounds);
}
}
/**
* Gets maximized bounds for this frame .
* Some fields may contain { @ code Integer . MAX_VALUE } to indicate
* that system supplied values for this field must be used .
*
* @ return maximized bounds for this frame ; may be { @ code null }
* @ see # setMaximizedBounds ( Rectangle )
* @ since 1 . 4
*/
public Rectangle getMaximizedBounds() {
synchronized (getObjectLock()) {
return maximizedBounds;
}
}
/**
* Disables or enables decorations for this frame .
* < p >
* This method can only be called while the frame is not displayable . To
* make this frame decorated , it must be opaque and have the default shape ,
* otherwise the { @ code IllegalComponentStateException } will be thrown .
* Refer to { @ link Window # setShape } , { @ link Window # setOpacity } and { @ link
* Window # setBackground } for details
*
* @ param undecorated { @ code true } if no frame decorations are to be
* enabled ; { @ code false } if frame decorations are to be enabled
*
* @ throws IllegalComponentStateException if the frame is displayable
* @ throws IllegalComponentStateException if { @ code undecorated } is
* { @ code false } , and this frame does not have the default shape
* @ throws IllegalComponentStateException if { @ code undecorated } is
* { @ code false } , and this frame opacity is less than { @ code 1 . 0 f }
* @ throws IllegalComponentStateException if { @ code undecorated } is
* { @ code false } , and the alpha value of this frame background
* color is less than { @ code 1 . 0 f }
*
* @ see # isUndecorated
* @ see Component # isDisplayable
* @ see Window # getShape
* @ see Window # getOpacity
* @ see Window # getBackground
* @ see javax . swing . JFrame # setDefaultLookAndFeelDecorated ( boolean )
*
* @ since 1 . 4
*/
public void setUndecorated(boolean undecorated) {
/* Make sure we don't run in the middle of peer creation.*/
synchronized (getTreeLock()) {
if (isDisplayable()) {
throw new IllegalComponentStateException("The frame is displayable." );
}
if (!undecorated) {
if (getOpacity() < 1 .0 f) {
throw new IllegalComponentStateException("The frame is not opaque" );
}
if (getShape() != null ) {
throw new IllegalComponentStateException("The frame does not have a default shape" );
}
Color bg = getBackground();
if ((bg != null ) && (bg.getAlpha() < 255 )) {
throw new IllegalComponentStateException("The frame background color is not opaque" );
}
}
this .undecorated = undecorated;
}
}
/**
* Indicates whether this frame is undecorated .
* By default , all frames are initially decorated .
* @ return { @ code true } if frame is undecorated ;
* { @ code false } otherwise .
* @ see java . awt . Frame # setUndecorated ( boolean )
* @ since 1 . 4
*/
public boolean isUndecorated() {
return undecorated;
}
/**
* { @ inheritDoc }
*/
@Override
public void setOpacity(float opacity) {
synchronized (getTreeLock()) {
if ((opacity < 1 .0 f) && !isUndecorated()) {
throw new IllegalComponentStateException("The frame is decorated" );
}
super .setOpacity(opacity);
}
}
/**
* { @ inheritDoc }
*/
@Override
public void setShape(Shape shape) {
synchronized (getTreeLock()) {
if ((shape != null ) && !isUndecorated()) {
throw new IllegalComponentStateException("The frame is decorated" );
}
super .setShape(shape);
}
}
/**
* { @ inheritDoc }
*/
@Override
public void setBackground(Color bgColor) {
synchronized (getTreeLock()) {
if ((bgColor != null ) && (bgColor.getAlpha() < 255 ) && !isUndecorated()) {
throw new IllegalComponentStateException("The frame is decorated" );
}
super .setBackground(bgColor);
}
}
/**
* Removes the specified menu bar from this frame .
* @ param m the menu component to remove .
* If { @ code m } is { @ code null } , then
* no action is taken
*/
public void remove(MenuComponent m) {
if (m == null ) {
return ;
}
synchronized (getTreeLock()) {
if (m == menuBar) {
menuBar = null ;
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
mbManagement = true ;
invalidateIfValid();
peer.setMenuBar(null );
m.removeNotify();
}
m.parent = null ;
} else {
super .remove(m);
}
}
}
/**
* Makes this Frame undisplayable by removing its connection
* to its native screen resource . Making a Frame undisplayable
* will cause any of its children to be made undisplayable .
* This method is called by the toolkit internally and should
* not be called directly by programs .
* @ see Component # isDisplayable
* @ see # addNotify
*/
public void removeNotify() {
synchronized (getTreeLock()) {
FramePeer peer = (FramePeer)this .peer;
if (peer != null ) {
// get the latest Frame state before disposing
getState();
if (menuBar != null ) {
mbManagement = true ;
peer.setMenuBar(null );
menuBar.removeNotify();
}
}
super .removeNotify();
}
}
void postProcessKeyEvent(KeyEvent e) {
if (menuBar != null && menuBar.handleShortcut(e)) {
e.consume();
return ;
}
super .postProcessKeyEvent(e);
}
/**
* Returns a string representing the state of this { @ code Frame } .
* This method is intended to be used only for debugging purposes , and the
* content and format of the returned string may vary between
* implementations . The returned string may be empty but may not be
* { @ code null } .
*
* @ return the parameter string of this frame
*/
protected String paramString() {
String str = super .paramString();
if (title != null ) {
str += ",title=" + title;
}
if (resizable) {
str += ",resizable" ;
}
int state = getExtendedState();
if (state == NORMAL) {
str += ",normal" ;
}
else {
if ((state & ICONIFIED) != 0 ) {
str += ",iconified" ;
}
if ((state & MAXIMIZED_BOTH) == MAXIMIZED_BOTH) {
str += ",maximized" ;
}
else if ((state & MAXIMIZED_HORIZ) != 0 ) {
str += ",maximized_horiz" ;
}
else if ((state & MAXIMIZED_VERT) != 0 ) {
str += ",maximized_vert" ;
}
}
return str;
}
/**
* Sets the cursor for this frame to the specified type .
*
* @ param cursorType the cursor type
* @ deprecated As of JDK version 1 . 1 ,
* replaced by { @ code Component . setCursor ( Cursor ) } .
*/
@Deprecated
public void setCursor(int cursorType) {
if (cursorType < DEFAULT_CURSOR || cursorType > MOVE_CURSOR) {
throw new IllegalArgumentException("illegal cursor type" );
}
setCursor(Cursor.getPredefinedCursor(cursorType));
}
/**
* @ deprecated As of JDK version 1 . 1 ,
* replaced by { @ code Component . getCursor ( ) } .
* @ return the cursor type for this frame
*/
@Deprecated
public int getCursorType() {
return (getCursor().getType());
}
/**
* Returns an array of all { @ code Frame } s created by this application .
* If called from an applet , the array includes only the { @ code Frame } s
* accessible by that applet .
* < p >
* < b > Warning : < / b > this method may return system created frames , such
* as a shared , hidden frame which is used by Swing . Applications
* should not assume the existence of these frames , nor should an
* application assume anything about these frames such as component
* positions , { @ code LayoutManager } s or serialization .
* < p >
* < b > Note < / b > : To obtain a list of all ownerless windows , including
* ownerless { @ code Dialog } s ( introduced in release 1 . 6 ) , use { @ link
* Window # getOwnerlessWindows Window . getOwnerlessWindows } .
*
* @ return the array of all { @ code Frame } s created by this application
*
* @ see Window # getWindows ( )
* @ see Window # getOwnerlessWindows
*
* @ since 1 . 2
*/
public static Frame[] getFrames() {
Window[] allWindows = Window.getWindows();
int frameCount = 0 ;
for (Window w : allWindows) {
if (w instanceof Frame) {
frameCount++;
}
}
Frame[] frames = new Frame[frameCount];
int c = 0 ;
for (Window w : allWindows) {
if (w instanceof Frame) {
frames[c++] = (Frame)w;
}
}
return frames;
}
/* Serialization support. If there's a MenuBar we restore
* its ( transient ) parent field here . Likewise for top level
* windows that are " owned " by this frame .
*/
/**
* { @ code Frame } ' s Serialized Data Version .
*
* @ serial
*/
private int frameSerializedDataVersion = 1 ;
/**
* Writes default serializable fields to stream . Writes
* an optional serializable icon { @ code Image } , which is
* available as of 1 . 4 .
*
* @ param s the { @ code ObjectOutputStream } to write
* @ throws IOException if an I / O error occurs
* @ serialData an optional icon { @ code Image }
* @ see java . awt . Image
* @ see # getIconImage
* @ see # setIconImage ( Image )
* @ see # readObject ( ObjectInputStream )
*/
@Serial
private void writeObject(ObjectOutputStream s)
throws IOException
{
s.defaultWriteObject();
if (icons != null && icons.size() > 0 ) {
Image icon1 = icons.get(0 );
if (icon1 instanceof Serializable) {
s.writeObject(icon1);
return ;
}
}
s.writeObject(null );
}
/**
* Reads the { @ code ObjectInputStream } . Tries
* to read an icon { @ code Image } , which is optional
* data available as of 1 . 4 . If an icon { @ code Image }
* is not available , but anything other than an EOF
* is detected , an { @ code OptionalDataException }
* will be thrown .
* Unrecognized keys or values will be ignored .
*
* @ param s the { @ code ObjectInputStream } to read
* @ throws ClassNotFoundException if the class of a serialized object could
* not be found
* @ throws java . io . OptionalDataException if an icon { @ code Image } is not
* available , but anything other than an EOF is detected
* @ throws HeadlessException if { @ code GraphicsEnvironment . isHeadless ( ) }
* returns { @ code true }
* @ see java . awt . GraphicsEnvironment # isHeadless ( )
* @ see java . awt . Image
* @ see # getIconImage
* @ see # setIconImage ( Image )
* @ see # writeObject ( ObjectOutputStream )
*/
@Serial
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException, HeadlessException
{
// HeadlessException is thrown by Window's readObject
s.defaultReadObject();
try {
Image icon = (Image) s.readObject();
if (icons == null ) {
icons = new ArrayList<Image>();
icons.add(icon);
}
} catch (java.io.OptionalDataException e) {
// pre-1.4 instances will not have this optional data.
// 1.6 and later instances serialize icons in the Window class
// e.eof will be true to indicate that there is no more
// data available for this object.
// If e.eof is not true, throw the exception as it
// might have been caused by unrelated reasons.
if (!e.eof) {
throw (e);
}
}
if (menuBar != null )
menuBar.parent = this ;
// Ensure 1.1 serialized Frames can read & hook-up
// owned windows properly
//
if (ownedWindows != null ) {
for (int i = 0 ; i < ownedWindows.size(); i++) {
connectOwnedWindow(ownedWindows.elementAt(i));
}
ownedWindows = null ;
}
}
/**
* Initialize JNI field and method IDs
*/
private static native void initIDs();
/*
* - - - Accessibility Support - - -
*
*/
/**
* Gets the AccessibleContext associated with this Frame .
* For frames , the AccessibleContext takes the form of an
* AccessibleAWTFrame .
* A new AccessibleAWTFrame instance is created if necessary .
*
* @ return an AccessibleAWTFrame that serves as the
* AccessibleContext of this Frame
* @ since 1 . 3
*/
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null ) {
accessibleContext = new AccessibleAWTFrame();
}
return accessibleContext;
}
/**
* This class implements accessibility support for the
* { @ code Frame } class . It provides an implementation of the
* Java Accessibility API appropriate to frame user - interface elements .
* @ since 1 . 3
*/
protected class AccessibleAWTFrame extends AccessibleAWTWindow
{
/**
* Use serialVersionUID from JDK 1 . 3 for interoperability .
*/
@Serial
private static final long serialVersionUID = -6172960752956030250 L;
/**
* Constructs an { @ code AccessibleAWTFrame } .
*/
protected AccessibleAWTFrame() {}
/**
* Get the role of this object .
*
* @ return an instance of AccessibleRole describing the role of the
* object
* @ see AccessibleRole
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.FRAME;
}
/**
* Get the state of this object .
*
* @ return an instance of AccessibleStateSet containing the current
* state set of the object
* @ see AccessibleState
*/
public AccessibleStateSet getAccessibleStateSet() {
AccessibleStateSet states = super .getAccessibleStateSet();
if (getFocusOwner() != null ) {
states.add(AccessibleState.ACTIVE);
}
if (isResizable()) {
states.add(AccessibleState.RESIZABLE);
}
return states;
}
} // inner class AccessibleAWTFrame
}
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