java.awt

Class Toolkit


public abstract class Toolkit
extends Object

The AWT system uses a set of native peer objects to implement its widgets. These peers are provided by a peer toolkit, that is accessed via a subclass of this superclass. The system toolkit is retrieved by the static methods getDefaultToolkit. This method determines the system toolkit by examining the system property awt.toolkit. That property is set to the name of the Toolkit subclass for the specified peer set. If the awt.toolkit property is not set, then the default toolkit gnu.java.awt.peer.gtk.GtkToolkit is used. This toolkit creates its peers using the GTK+ toolkit.

Field Summary

protected Map
Object>()
protected Map
desktopProperties
protected PropertyChangeSupport
desktopPropsSupport

Constructor Summary

Toolkit()
Default constructor for subclasses.

Method Summary

void
addAWTEventListener(AWTEventListener listener, long eventMask)
Adds an AWTEventListener to this toolkit.
void
addPropertyChangeListener(String name, PropertyChangeListener pcl)
abstract void
beep()
Causes a "beep" tone to be generated.
abstract int
checkImage(Image image, int width, int height, ImageObserver observer)
Checks the status of specified image as it is being readied for rendering.
protected abstract ButtonPeer
createButton(Button target)
Creates a peer object for the specified Button.
protected abstract CanvasPeer
createCanvas(Canvas target)
Creates a peer object for the specified Canvas.
protected abstract CheckboxPeer
createCheckbox(Checkbox target)
Creates a peer object for the specified Checkbox.
protected abstract CheckboxMenuItemPeer
createCheckboxMenuItem(CheckboxMenuItem target)
Creates a peer object for the specified CheckboxMenuItem.
protected abstract ChoicePeer
createChoice(Choice target)
Creates a peer object for the specified Choice.
protected LightweightPeer
createComponent(Component target)
Creates a peer object for the specified Component.
Cursor
createCustomCursor(Image cursor, Point hotSpot, String name)
Creates a new custom cursor object.
protected abstract DesktopPeer
createDesktopPeer(Desktop target)
protected abstract DialogPeer
createDialog(Dialog target)
Creates a peer object for the specified Dialog.
abstract DragSourceContextPeer
createDragSourceContextPeer(DragGestureEvent e)
protected abstract FileDialogPeer
createFileDialog(FileDialog target)
Creates a peer object for the specified FileDialog.
protected abstract FramePeer
createFrame(Frame target)
Creates a peer object for the specified Frame.
Image
createImage(byte[] data)
Creates an image from the specified byte array.
abstract Image
createImage(byte[] data, int offset, int len)
Creates an image from the specified portion of the byte array passed.
abstract Image
createImage(ImageProducer producer)
Creates an image using the specified ImageProducer
abstract Image
createImage(String filename)
abstract Image
createImage(URL url)
protected abstract LabelPeer
createLabel(Label target)
Creates a peer object for the specified Label.
protected abstract ListPeer
createList(List target)
Creates a peer object for the specified List.
protected abstract MenuPeer
createMenu(Menu target)
Creates a peer object for the specified Menu.
protected abstract MenuBarPeer
createMenuBar(MenuBar target)
Creates a peer object for the specified MenuBar.
protected abstract MenuItemPeer
createMenuItem(MenuItem target)
Creates a peer object for the specified MenuItem.
protected abstract PanelPeer
createPanel(Panel target)
Creates a peer object for the specified Panel.
protected abstract PopupMenuPeer
createPopupMenu(PopupMenu target)
Creates a peer object for the specified PopupMenu.
protected abstract ScrollPanePeer
createScrollPane(ScrollPane target)
Creates a peer object for the specified ScrollPane.
protected abstract ScrollbarPeer
createScrollbar(Scrollbar target)
Creates a peer object for the specified Scrollbar.
protected abstract TextAreaPeer
createTextArea(TextArea target)
Creates a peer object for the specified TextArea.
protected abstract TextFieldPeer
createTextField(TextField target)
Creates a peer object for the specified TextField.
protected abstract WindowPeer
createWindow(Window target)
Creates a peer object for the specified Window.
extends DragGestureRecognizer> T createDragGestureRecognizer(Class recognizer, DragSource ds, Component comp, int actions, DragGestureListener l)
AWTEventListener[]
getAWTEventListeners()
Returns all registered AWT event listeners.
AWTEventListener[]
getAWTEventListeners(long mask)
Returns all registered AWT event listeners that listen for events with the specified eventMask.
Dimension
getBestCursorSize(int preferredWidth, int preferredHeight)
Returns the supported cursor dimension which is closest to the desired sizes.
abstract ColorModel
getColorModel()
Returns the color model of the screen.
static Toolkit
getDefaultToolkit()
Returns an instance of the default toolkit.
Object
getDesktopProperty(String propertyName)
abstract String[]
getFontList()
Deprecated.
abstract FontMetrics
getFontMetrics(Font name)
Deprecated.
protected abstract FontPeer
getFontPeer(String name, int style)
Deprecated.
abstract Image
getImage(String name)
Returns an image from the specified file, which must be in a recognized format.
abstract Image
getImage(URL url)
Returns an image from the specified URL, which must be in a recognized format.
boolean
getLockingKeyState(int keyCode)
Returns whether the given locking key on the keyboard is currently in its "on" state.
int
getMaximumCursorColors()
Returns the maximum number of colors the Toolkit supports in a custom cursor palette.
int
getMenuShortcutKeyMask()
Returns the accelerator key mask for menu shortcuts.
protected MouseInfoPeer
getMouseInfoPeer()
Returns a MouseInfoPeer.
protected static Container
getNativeContainer(Component component)
Returns the native container object of the specified component.
PrintJob
getPrintJob(Frame frame, String title, JobAttributes jobAttr, PageAttributes pageAttr)
Returns a instance of PrintJob for the specified arguments.
abstract PrintJob
getPrintJob(Frame frame, String title, Properties props)
Returns a instance of PrintJob for the specified arguments.
static String
getProperty(String key, String def)
Returns the value of the property with the specified name, or the default value if the property does not exist.
PropertyChangeListener[]
getPropertyChangeListeners()
PropertyChangeListener[]
getPropertyChangeListeners(String name)
Insets
getScreenInsets(GraphicsConfiguration gc)
abstract int
getScreenResolution()
Returns the screen resolution in dots per square inch.
abstract Dimension
getScreenSize()
Returns the dimensions of the screen in pixels.
abstract Clipboard
getSystemClipboard()
Returns the system clipboard.
EventQueue
getSystemEventQueue()
Returns the event queue that is suitable for the calling context.
protected abstract EventQueue
getSystemEventQueueImpl()
Returns the event queue that is suitable for the calling context.
Clipboard
getSystemSelection()
Gets the singleton instance of the system selection as a Clipboard object.
protected void
initializeDesktopProperties()
boolean
isDynamicLayoutActive()
protected boolean
isDynamicLayoutSet()
boolean
isFrameStateSupported(int state)
Returns whether Toolkit supports this state for Frames.
abstract boolean
isModalExclusionTypeSupported(Dialog.ModalExclusionType modalExclusionType)
abstract boolean
isModalityTypeSupported(Dialog.ModalityType modalityType)
protected Object
lazilyLoadDesktopProperty(String name)
protected void
loadSystemColors(systemColors[] )
Copies the current system colors into the specified array.
abstract Map
mapInputMethodHighlight(InputMethodHighlight highlight)
abstract boolean
prepareImage(Image image, int width, int height, ImageObserver observer)
Readies an image to be rendered on the screen.
void
removeAWTEventListener(AWTEventListener listener)
Removes an AWT event listener from this toolkit.
void
removePropertyChangeListener(String name, PropertyChangeListener pcl)
protected void
setDesktopProperty(String name, Object newValue)
void
setDynamicLayout(boolean dynamic)
void
setLockingKeyState(int keyCode, boolean on)
Sets the state of the given locking key on the keyboard.
abstract void
sync()
Flushes any buffered data to the screen so that it is in sync with what the AWT system has drawn to it.

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

Object>()

protected final Map Object>()

desktopProperties

protected final Map desktopProperties

desktopPropsSupport

protected final PropertyChangeSupport desktopPropsSupport

Constructor Details

Toolkit

public Toolkit()
Default constructor for subclasses.

Method Details

addAWTEventListener

public void addAWTEventListener(AWTEventListener listener,
                                long eventMask)
Adds an AWTEventListener to this toolkit. This listener is informed about all events that pass the eventqueue that match the specified evenMask. The eventMask is an ORed combination of event masks as defined in AWTEvent. If a security manager is installed, it is asked first if an AWTPermission("listenToAllAWTEvents") is allowed. This may result in a SecurityException beeing thrown. It is not recommended to use this kind of notification for normal applications. It is intended solely for the purpose of debugging and to support special facilities.
Parameters:
listener - the listener to add
eventMask - the event mask of event types which the listener is interested in
Throws:
SecurityException - if there is a SecurityManager that doesn't grant AWTPermission("listenToAllAWTEvents")
Since:
1.2

addPropertyChangeListener

public void addPropertyChangeListener(String name,
                                      PropertyChangeListener pcl)

beep

public abstract void beep()
Causes a "beep" tone to be generated.

checkImage

public abstract int checkImage(Image image,
                               int width,
                               int height,
                               ImageObserver observer)
Checks the status of specified image as it is being readied for rendering.
Parameters:
image - The image to prepare for rendering.
width - The width of the image.
height - The height of the image.
observer - The observer to receive events about the preparation process.
Returns:
A union of the bitmasks from java.awt.image.ImageObserver that indicates the current state of the imaging readying process.

createButton

protected abstract ButtonPeer createButton(Button target)
Creates a peer object for the specified Button.
Parameters:
target - The Button to create the peer for.
Returns:
The peer for the specified Button object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createCanvas

protected abstract CanvasPeer createCanvas(Canvas target)
Creates a peer object for the specified Canvas.
Parameters:
target - The Canvas to create the peer for.
Returns:
The peer for the specified Canvas object.

createCheckbox

protected abstract CheckboxPeer createCheckbox(Checkbox target)
Creates a peer object for the specified Checkbox.
Parameters:
target - The Checkbox to create the peer for.
Returns:
The peer for the specified Checkbox object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createCheckboxMenuItem

protected abstract CheckboxMenuItemPeer createCheckboxMenuItem(CheckboxMenuItem target)
Creates a peer object for the specified CheckboxMenuItem.
Parameters:
target - The CheckboxMenuItem to create the peer for.
Returns:
The peer for the specified CheckboxMenuItem object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createChoice

protected abstract ChoicePeer createChoice(Choice target)
Creates a peer object for the specified Choice.
Parameters:
target - The Choice to create the peer for.
Returns:
The peer for the specified Choice object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createComponent

protected LightweightPeer createComponent(Component target)
Creates a peer object for the specified Component. The peer returned by this method is not a native windowing system peer with its own native window. Instead, this method allows the component to draw on its parent window as a "lightweight" widget.
Parameters:
target - The Component to create the peer for.
Returns:
The peer for the specified Component object.

createCustomCursor

public Cursor createCustomCursor(Image cursor,
                                 Point hotSpot,
                                 String name)
Creates a new custom cursor object.
Throws:
IndexOutOfBoundsException - If the hotSpot values are outside the bounds of the cursor.
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createDesktopPeer

protected abstract DesktopPeer createDesktopPeer(Desktop target)
            throws HeadlessException
Parameters:
target -
Returns:

createDialog

protected abstract DialogPeer createDialog(Dialog target)
Creates a peer object for the specified Dialog.
Parameters:
target - The dialog to create the peer for
Returns:
The peer for the specified font name.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createDragSourceContextPeer

public abstract DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent e)
Since:
1.3

createFileDialog

protected abstract FileDialogPeer createFileDialog(FileDialog target)
Creates a peer object for the specified FileDialog.
Parameters:
target - The FileDialog to create the peer for.
Returns:
The peer for the specified FileDialog object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createFrame

protected abstract FramePeer createFrame(Frame target)
Creates a peer object for the specified Frame.
Parameters:
target - The Frame to create the peer for.
Returns:
The peer for the specified Frame object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createImage

public Image createImage(byte[] data)
Creates an image from the specified byte array. The array must be in a recognized format. Supported formats vary from toolkit to toolkit.
Parameters:
data - The raw image data.
Returns:
The created image.

createImage

public abstract Image createImage(byte[] data,
                                  int offset,
                                  int len)
Creates an image from the specified portion of the byte array passed. The array must be in a recognized format. Supported formats vary from toolkit to toolkit.
Parameters:
data - The raw image data.
offset - The offset into the data where the image data starts.
len - The length of the image data.
Returns:
The created image.

createImage

public abstract Image createImage(ImageProducer producer)
Creates an image using the specified ImageProducer
Parameters:
producer - The ImageProducer to create the image from.
Returns:
The created image.

createImage

public abstract Image createImage(String filename)

createImage

public abstract Image createImage(URL url)

createLabel

protected abstract LabelPeer createLabel(Label target)
Creates a peer object for the specified Label.
Parameters:
target - The Label to create the peer for.
Returns:
The peer for the specified Label object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createList

protected abstract ListPeer createList(List target)
Creates a peer object for the specified List.
Parameters:
target - The List to create the peer for.
Returns:
The peer for the specified List object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createMenu

protected abstract MenuPeer createMenu(Menu target)
Creates a peer object for the specified Menu.
Parameters:
target - The Menu to create the peer for.
Returns:
The peer for the specified Menu object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createMenuBar

protected abstract MenuBarPeer createMenuBar(MenuBar target)
Creates a peer object for the specified MenuBar.
Parameters:
target - The MenuBar to create the peer for.
Returns:
The peer for the specified MenuBar object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createMenuItem

protected abstract MenuItemPeer createMenuItem(MenuItem target)
Creates a peer object for the specified MenuItem.
Parameters:
target - The MenuItem to create the peer for.
Returns:
The peer for the specified MenuItem object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createPanel

protected abstract PanelPeer createPanel(Panel target)
Creates a peer object for the specified Panel.
Parameters:
target - The Panel to create the peer for.
Returns:
The peer for the specified Panel object.

createPopupMenu

protected abstract PopupMenuPeer createPopupMenu(PopupMenu target)
Creates a peer object for the specified PopupMenu.
Parameters:
target - The PopupMenu to create the peer for.
Returns:
The peer for the specified PopupMenu object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createScrollPane

protected abstract ScrollPanePeer createScrollPane(ScrollPane target)
Creates a peer object for the specified ScrollPane.
Parameters:
target - The ScrollPane to create the peer for.
Returns:
The peer for the specified ScrollPane object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createScrollbar

protected abstract ScrollbarPeer createScrollbar(Scrollbar target)
Creates a peer object for the specified Scrollbar.
Parameters:
target - The Scrollbar to create the peer for.
Returns:
The peer for the specified Scrollbar object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createTextArea

protected abstract TextAreaPeer createTextArea(TextArea target)
Creates a peer object for the specified TextArea.
Parameters:
target - The TextArea to create the peer for.
Returns:
The peer for the specified TextArea object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createTextField

protected abstract TextFieldPeer createTextField(TextField target)
Creates a peer object for the specified TextField.
Parameters:
target - The TextField to create the peer for.
Returns:
The peer for the specified TextField object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

createWindow

protected abstract WindowPeer createWindow(Window target)
Creates a peer object for the specified Window.
Parameters:
target - The Window to create the peer for.
Returns:
The peer for the specified Window object.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

extends DragGestureRecognizer> T createDragGestureRecognizer

public extends DragGestureRecognizer> T
    createDragGestureRecognizer(Class recognizer,
                                                                           DragSource ds,
                                                                           Component comp,
                                                                           int actions,
                                                                           DragGestureListener l)
Since:
1.3

getAWTEventListeners

public AWTEventListener[] getAWTEventListeners()
Returns all registered AWT event listeners. This method returns a copy of the listener array, so that application cannot trash the listener list. If a security manager is installed, it is asked first if an AWTPermission("listenToAllAWTEvents") is allowed. This may result in a SecurityException beeing thrown. It is not recommended to use this kind of notification for normal applications. It is intended solely for the purpose of debugging and to support special facilities.
Returns:
all registered AWT event listeners
Throws:
SecurityException - if there is a SecurityManager that doesn't grant AWTPermission("listenToAllAWTEvents")
Since:
1.4

getAWTEventListeners

public AWTEventListener[] getAWTEventListeners(long mask)
Returns all registered AWT event listeners that listen for events with the specified eventMask. This method returns a copy of the listener array, so that application cannot trash the listener list. If a security manager is installed, it is asked first if an AWTPermission("listenToAllAWTEvents") is allowed. This may result in a SecurityException beeing thrown. It is not recommended to use this kind of notification for normal applications. It is intended solely for the purpose of debugging and to support special facilities.
Parameters:
mask - the event mask
Throws:
SecurityException - if there is a SecurityManager that doesn't grant AWTPermission("listenToAllAWTEvents")
Since:
1.4

getBestCursorSize

public Dimension getBestCursorSize(int preferredWidth,
                                   int preferredHeight)
Returns the supported cursor dimension which is closest to the desired sizes.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getColorModel

public abstract ColorModel getColorModel()
Returns the color model of the screen.
Returns:
The color model of the screen.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getDefaultToolkit

public static Toolkit getDefaultToolkit()
Returns an instance of the default toolkit. The default toolkit is the subclass of Toolkit specified in the system property awt.toolkit, or gnu.java.awt.peer.gtk.GtkToolkit if the property is not set.
Returns:
An instance of the system default toolkit.

getDesktopProperty

public final Object getDesktopProperty(String propertyName)

getFontList

public abstract String[] getFontList()

Deprecated.

Returns the names of the available fonts.
Returns:
The names of the available fonts.

getFontMetrics

public abstract FontMetrics getFontMetrics(Font name)

Deprecated.

Return the font metrics for the specified font
Parameters:
name - The name of the font to return metrics for.
Returns:
The requested font metrics.

getFontPeer

protected abstract FontPeer getFontPeer(String name,
                                        int style)

Deprecated.

Creates a peer object for the specified font name.
Parameters:
name - The font to create the peer for.
style - The font style to create the peer for.
Returns:
The peer for the specified font name.

getImage

public abstract Image getImage(String name)
Returns an image from the specified file, which must be in a recognized format. Supported formats vary from toolkit to toolkit.
Returns:
name The name of the file to read the image from.

getImage

public abstract Image getImage(URL url)
Returns an image from the specified URL, which must be in a recognized format. Supported formats vary from toolkit to toolkit.
Returns:
url The URl to read the image from.

getLockingKeyState

public boolean getLockingKeyState(int keyCode)
Returns whether the given locking key on the keyboard is currently in its "on" state.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
IllegalArgumentException - If keyCode is not one of the valid keys.
UnsupportedOperationException - If the host system doesn't allow getting the state of this key programmatically, or if the keyboard doesn't have this key.

getMaximumCursorColors

public int getMaximumCursorColors()
Returns the maximum number of colors the Toolkit supports in a custom cursor palette.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getMenuShortcutKeyMask

public int getMenuShortcutKeyMask()
Returns the accelerator key mask for menu shortcuts. The default is Event.CTRL_MASK. A toolkit must override this method to change the default.
Returns:
The key mask for the menu accelerator key.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getMouseInfoPeer

protected MouseInfoPeer getMouseInfoPeer()
Returns a MouseInfoPeer. The default implementation of this method throws UnsupportedOperationException. Toolkit implementations should overload this if possible, however.

getNativeContainer

protected static Container getNativeContainer(Component component)
Returns the native container object of the specified component. This method is necessary because the parent component might be a lightweight component.
Parameters:
component - The component to fetch the native container for.
Returns:
The native container object for this component.

getPrintJob

public PrintJob getPrintJob(Frame frame,
                            String title,
                            JobAttributes jobAttr,
                            PageAttributes pageAttr)
Returns a instance of PrintJob for the specified arguments.
Parameters:
frame - The window initiating the print job.
title - The print job title.
jobAttr - A set of job attributes which will control the print job.
pageAttr - A set of page attributes which will control the print job.
Throws:
NullPointerException - If frame is null, and either jobAttr is null or jobAttr.getDialog() returns JobAttributes.DialogType.NATIVE.
IllegalArgumentException - If pageAttrspecifies differing cross feed and feed resolutions, or when GraphicsEnvironment.isHeadless() returns true.
SecurityException - If this thread is not allowed to initiate a print job request.
Since:
1.3

getPrintJob

public abstract PrintJob getPrintJob(Frame frame,
                                     String title,
                                     Properties props)
Returns a instance of PrintJob for the specified arguments.
Parameters:
frame - The window initiating the print job.
title - The print job title.
props - The print job properties.
Returns:
The requested print job, or null if the job was cancelled.
Throws:
NullPointerException - If frame is null, or GraphicsEnvironment.isHeadless() returns true.
SecurityException - If this thread is not allowed to initiate a print job request.

getProperty

public static String getProperty(String key,
                                 String def)
Returns the value of the property with the specified name, or the default value if the property does not exist.
Parameters:
key - The name of the property to retrieve.
def - The default value of the property.

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners()
Since:
1.4

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners(String name)
Since:
1.4

getScreenInsets

public Insets getScreenInsets(GraphicsConfiguration gc)
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
Since:
1.4

getScreenResolution

public abstract int getScreenResolution()
Returns the screen resolution in dots per square inch.
Returns:
The screen resolution in dots per square inch.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getScreenSize

public abstract Dimension getScreenSize()
Returns the dimensions of the screen in pixels.
Returns:
The dimensions of the screen in pixels.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getSystemClipboard

public abstract Clipboard getSystemClipboard()
Returns the system clipboard.
Returns:
THe system clipboard.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.

getSystemEventQueue

public final EventQueue getSystemEventQueue()
Returns the event queue that is suitable for the calling context.

Despite the word “System” in the name of this method, a toolkit may provide different event queues for each applet. There is no guarantee that the same queue is shared system-wide.

The implementation first checks whether a SecurityManager has been installed. If so, its SecurityManager.checkAwtEventQueueAccess() method gets called. The security manager will throw a SecurityException if it does not grant the permission to access the event queue.

Next, the call is delegated to getSystemEventQueueImpl().

Returns:
The event queue for this applet (or application).
Throws:
SecurityException - if a security manager has been installed, and it does not grant the permission to access the event queue.

getSystemEventQueueImpl

protected abstract EventQueue getSystemEventQueueImpl()
Returns the event queue that is suitable for the calling context.

Despite the word “System” in the name of this method, a toolkit may provide different event queues for each applet. There is no guarantee that the same queue is shared system-wide.

No security checks are performed, which is why this method may only be called by Toolkits.


getSystemSelection

public Clipboard getSystemSelection()
Gets the singleton instance of the system selection as a Clipboard object. The system selection contains the selected text of the last component/widget that had focus and a text selection. The default implementation returns null.
Returns:
The Clipboard holding the system (text) selection or null if the Toolkit or system doesn't support a selection clipboard.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
SecurityException - If the current security manager checkSystemClipboardAccess() doesn't allow access.
Since:
1.4

initializeDesktopProperties

protected void initializeDesktopProperties()

isDynamicLayoutActive

public boolean isDynamicLayoutActive()
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
Since:
1.4

isDynamicLayoutSet

protected boolean isDynamicLayoutSet()
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
Since:
1.4

isFrameStateSupported

public boolean isFrameStateSupported(int state)
Returns whether Toolkit supports this state for Frames.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
Since:
1.4

isModalExclusionTypeSupported

public abstract boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType modalExclusionType)

isModalityTypeSupported

public abstract boolean isModalityTypeSupported(Dialog.ModalityType modalityType)

lazilyLoadDesktopProperty

protected Object lazilyLoadDesktopProperty(String name)

loadSystemColors

protected void loadSystemColors(systemColors[] )
Copies the current system colors into the specified array. This is the interface used by the SystemColor class. Although this method fills in the array with some default colors a real Toolkit should override this method and provide real system colors for the native GUI platform.
Parameters:
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
See Also:
SystemColor

mapInputMethodHighlight

public abstract Map mapInputMethodHighlight(InputMethodHighlight highlight)
Since:
1.3

prepareImage

public abstract boolean prepareImage(Image image,
                                     int width,
                                     int height,
                                     ImageObserver observer)
Readies an image to be rendered on the screen. The width and height values can be set to the default sizes for the image by passing -1 in those parameters.
Parameters:
image - The image to prepare for rendering.
width - The width of the image.
height - The height of the image.
observer - The observer to receive events about the preparation process.
Returns:
true if the image is already prepared for rendering, false otherwise.

removeAWTEventListener

public void removeAWTEventListener(AWTEventListener listener)
Removes an AWT event listener from this toolkit. This listener is no longer informed of any event types it was registered in. If a security manager is installed, it is asked first if an AWTPermission("listenToAllAWTEvents") is allowed. This may result in a SecurityException beeing thrown. It is not recommended to use this kind of notification for normal applications. It is intended solely for the purpose of debugging and to support special facilities.
Parameters:
listener - the listener to remove
Throws:
SecurityException - if there is a SecurityManager that doesn't grant AWTPermission("listenToAllAWTEvents")
Since:
1.2

removePropertyChangeListener

public void removePropertyChangeListener(String name,
                                         PropertyChangeListener pcl)

setDesktopProperty

protected final void setDesktopProperty(String name,
                                        Object newValue)

setDynamicLayout

public void setDynamicLayout(boolean dynamic)
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
Since:
1.4

setLockingKeyState

public void setLockingKeyState(int keyCode,
                               boolean on)
Sets the state of the given locking key on the keyboard.
Throws:
HeadlessException - If GraphicsEnvironment.isHeadless() is true.
IllegalArgumentException - If keyCode is not one of the valid keys.
UnsupportedOperationException - If the host system doesn't allow getting the state of this key programmatically, or if the keyboard doesn't have this key.

sync

public abstract void sync()
Flushes any buffered data to the screen so that it is in sync with what the AWT system has drawn to it.

Toolkit.java -- AWT Toolkit superclass Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 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.