| package org.eclipse.swt.widgets;
|
|
|
| /*
|
| * (c) Copyright IBM Corp. 2000, 2001.
|
| * All Rights Reserved
|
| */
|
|
|
| import org.eclipse.swt.internal.*;
|
| import org.eclipse.swt.internal.motif.*;
|
| import org.eclipse.swt.*;
|
| import org.eclipse.swt.graphics.*;
|
| import org.eclipse.swt.events.*;
|
| import java.util.EventListener;
|
|
|
| /** |
| * This class is the abstract superclass of all user interface objects. |
| * Widgets are created, disposed and issue notification to listeners |
| * when events occur which affect them. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Dispose</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. However, it has not been marked |
| * final to allow those outside of the SWT development team to implement |
| * patched versions of the class in order to get around specific |
| * limitations in advance of when those limitations can be addressed |
| * by the team. Any class built using subclassing to access the internals |
| * of this class will likely fail to compile or run between releases and |
| * may be strongly platform specific. Subclassing should not be attempted |
| * without an intimate and detailed understanding of the workings of the |
| * hierarchy. No support is provided for user-written classes which are |
| * implemented as subclasses of this class. |
| * </p> |
| * |
| * @see #checkSubclass |
| */ |
| public abstract class Widget {
|
|
|
| public int handle;
|
| int style, state;
|
| EventTable eventTable;
|
| Object data;
|
| String [] keys;
|
| Object [] values;
|
|
|
| /* Global state flags */
|
| // static final int AUTOMATIC = 0x00000001;
|
| // static final int ACTIVE = 0x00000002;
|
| // static final int AUTOGRAB = 0x00000004;
|
| // static final int MULTIEXPOSE = 0x00000008;
|
| // static final int RESIZEREDRAW = 0x00000010;
|
| // static final int WRAP = 0x00000020;
|
| // static final int DISABLED = 0x00000040;
|
| // static final int HIDDEN = 0x00000080;
|
| // static final int FOREGROUND = 0x00000100;
|
| // static final int BACKGROUND = 0x00000200;
|
| static final int DISPOSED = 0x00000400;
|
| static final int HANDLE = 0x00000800;
|
| static final int CANVAS = 0x00001000;
|
|
|
| static final int DEFAULT_WIDTH = 64;
|
| static final int DEFAULT_HEIGHT = 64;
|
|
|
| /* Global widget variables */
|
| static final char Mnemonic = '&';
|
| static final boolean IsAIX, IsSunOS, IsLinux;
|
| static {
|
|
|
| /* Initialize the X/MOTIF flags */
|
| String osName = System.getProperty ("os.name");
|
| if (osName.equals("Linux")) {
|
| IsLinux = true;
|
| IsAIX = IsSunOS = false;
|
| } else {
|
| if (osName.equals("AIX")) {
|
| IsAIX = true;
|
| IsLinux = IsSunOS = false;
|
| } else {
|
| if (osName.equals("Solaris")) {
|
| IsSunOS = true;
|
| IsLinux = IsAIX = false;
|
| } else {
|
| IsLinux = IsSunOS = IsAIX = false;
|
| }
|
| }
|
| }
|
| }
|
| Widget () {
|
| /* Do nothing */
|
| }
|
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * for all SWT widget classes should include a comment which |
| * describes the style constants which are applicable to the class. |
| * </p> |
| * |
| * @param parent a widget which will be the parent of the new instance (cannot be null) |
| * @param style the style of widget to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT |
| * @see #checkSubclass |
| * @see #getStyle |
| */
|
| public Widget (Widget parent, int style) {
|
| if (parent == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (!parent.isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| this.style = style;
|
| }
|
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notifed when an event of the given type occurs. When the |
| * event does occur in the widget, the listener is notified by |
| * sending it the <code>handleEvent()</code> message. |
| * |
| * @param eventType the type of event to listen for |
| * @param listener the listener which should be notified when the event occurs |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see Listener |
| * @see #removeListener |
| */
|
| public void addListener (int eventType, Listener handler) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (handler == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (eventTable == null) eventTable = new EventTable ();
|
| eventTable.hook (eventType, handler);
|
| }
|
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notifed when the widget is disposed. When the widget is |
| * disposed, the listener is notified by sending it the |
| * <code>widgetDisposed()</code> message. |
| * |
| * @param listener the listener which should be notified when the receiver is disposed |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see DisposeListener |
| * @see #removeDisposeListener |
| */
|
| public void addDisposeListener (DisposeListener listener) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| TypedListener typedListener = new TypedListener (listener);
|
| addListener (SWT.Dispose, typedListener);
|
| }
|
| static int checkBits (int style, int int0, int int1, int int2, int int3, int int4, int int5) {
|
| int mask = int0 | int1 | int2 | int3 | int4 | int5;
|
| if ((style & mask) == 0) style |= int0;
|
| if ((style & int0) != 0) style = (style & ~mask) | int0;
|
| if ((style & int1) != 0) style = (style & ~mask) | int1;
|
| if ((style & int2) != 0) style = (style & ~mask) | int2;
|
| if ((style & int3) != 0) style = (style & ~mask) | int3;
|
| if ((style & int4) != 0) style = (style & ~mask) | int4;
|
| if ((style & int5) != 0) style = (style & ~mask) | int5;
|
| return style;
|
| }
|
| void checkParent (Widget parent) {
|
| if (parent == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (!parent.isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| }
|
| /**
|
| * Checks that this class can be subclassed.
|
| * <p>
|
| * IMPORTANT: By providing an implementation of this method that
|
| * allows subclassing in a subclass of this class, you agree to
|
| * be fully responsible for the fact that any such subclass will
|
| * likely fail between releases and will be strongly platform
|
| * specific. No support is provided for classes which are implemented
|
| * as subclasses of this class. The use of subclassing is intended
|
| * purely to enable those outside of the development team to implement
|
| * a patched version of the class in an emergency. Subclassing should
|
| * not be attempted without an intimate and detailed understanding of
|
| * the hierarchy.
|
| *
|
| * @exception SWTError <ul>
|
| * <li>ERROR_ILLEGAL_SUBCLASS when called</li>
|
| * </ul>
|
| */
|
| protected void checkSubclass () {
|
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
|
| }
|
| /**
|
| * Checks access to a widget.
|
| * <p>
|
| * Throws an exception when access to the widget
|
| * is denied.
|
| *
|
| * It is an error to call a method on a widget that
|
| * has been disposed or to call a method on a widget
|
| * from a thread that is different from the thread
|
| * that created the widget. There may be more or
|
| * less error checks in future or different versions
|
| * of SWT may issue different errors.
|
| *
|
| * This method is intended to be called by widget
|
| * implementors to enforce the standard SWT error
|
| * checking prologue in API methods.
|
| *
|
| * @exception SWTError(ERROR_THREAD_INVALID_ACCESS)
|
| * when called from the wrong thread
|
| * @exception SWTError(ERROR_WIDGET_DISPOSED)
|
| * when the widget has been disposed
|
| */
|
| protected void checkWidget () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| }
|
| void createHandle (int index) {
|
| /* Do nothing */
|
| }
|
| void createWidget (int index) {
|
| createHandle (index);
|
| hookEvents ();
|
| register ();
|
| manageChildren ();
|
| }
|
| void deregister () {
|
| if (handle == 0) return;
|
| WidgetTable.remove (handle);
|
| }
|
| void destroyWidget () {
|
| int topHandle = topHandle ();
|
| releaseHandle ();
|
| if (topHandle != 0) {
|
| OS.XtDestroyWidget (topHandle);
|
| }
|
| }
|
| /** |
| * Disposes of the operating system resources associated with |
| * the receiver and all its descendents. After this method has |
| * been invoked, the receiver and all descendents will answer |
| * <code>true</code> when sent the message <code>isDisposed()</code>. |
| * Any internal connections between the widgets in the tree will |
| * have been removed to facilitate garbage collection. |
| * <p> |
| * NOTE: This method is not called recursively on the descendents |
| * of the receiver. This means that, widget implementers can not |
| * detect when a widget is being disposed of by re-implementing |
| * this method, but should instead listen for the <code>Dispose</code> |
| * event. |
| * </p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #addDisposeListener |
| * @see #removeDisposeListener |
| * @see #checkWidget |
| */
|
| public void dispose () {
|
| /*
|
| * Note: It is valid to attempt to dispose a widget
|
| * more than once. If this happens, fail silently.
|
| */
|
| if (!isValidWidget ()) return;
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| releaseChild ();
|
| releaseWidget ();
|
| destroyWidget ();
|
| }
|
| void error (int code) {
|
| SWT.error(code);
|
| }
|
| /** |
| * Returns the application defined widget data associated |
| * with the receiver, or null if it has not been set. The |
| * <em>widget data</em> is a single, unnamed field that is |
| * stored with every widget. |
| * <p> |
| * Applications may put arbitrary objects in this field. If |
| * the object stored in the widget data needs to be notified |
| * when the widget is disposed of, it is the application's |
| * responsibility to hook the Dispose event on the widget and |
| * do so. |
| * </p> |
| * |
| * @return the widget data |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li> |
| * </ul> |
| * |
| * @see #setData |
| */
|
| public Object getData () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| return data;
|
| }
|
|
|
| /** |
| * Returns the application defined property of the receiver |
| * with the specified name, or null if it has not been set. |
| * <p> |
| * Applications may have associated arbitrary objects with the |
| * receiver in this fashion. If the objects stored in the |
| * properties need to be notified when the widget is disposed |
| * of, it is the application's responsibility to hook the |
| * Dispose event on the widget and do so. |
| * </p> |
| * |
| * @param key the name of the property |
| * @return the value of the property or null if it has not been set |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the key is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #setData |
| */
|
| public Object getData (String key) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (keys == null) return null;
|
| for (int i=0; i<keys.length; i++) {
|
| if (keys [i].equals (key)) return values [i];
|
| }
|
| return null;
|
| }
|
|
|
| /** |
| * Returns the <code>Display</code> that is associated with |
| * the receiver. |
| * <p> |
| * A widget's display is either provided when it is created |
| * (for example, top level <code>Shell</code>s) or is the |
| * same as its parent's display. |
| * </p> |
| * |
| * @return the receiver's display |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */
|
| public abstract Display getDisplay ();
|
| String getName () {
|
| String string = getClass ().getName ();
|
| int index = string.lastIndexOf ('.');
|
| if (index == -1) return string;
|
| return string.substring (index + 1, string.length ());
|
| }
|
| String getNameText () {
|
| return "";
|
| }
|
| /** |
| * Returns the receiver's style information. |
| * <p> |
| * Note that the value which is returned by this method <em>may |
| * not match</em> the value which was provided to the constructor |
| * when the receiver was created. This can occur when the underlying |
| * operating system does not support a particular combination of |
| * requested styles. For example, if the platform widget used to |
| * implement a particular SWT widget always has scroll bars, the |
| * result of calling this method would always have the |
| * <code>SWT.H_SCROLL</code> and <code>SWT.V_SCROLL</code> bits set. |
| * </p> |
| * |
| * @return the style bits |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */
|
| public int getStyle () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| return style;
|
| }
|
| void hookEvents () {
|
| /* Do nothing */
|
| }
|
| boolean hooks (int eventType) {
|
| if (eventTable == null) return false;
|
| return eventTable.hooks (eventType);
|
| }
|
| /** |
| * Returns <code>true</code> if the widget has been disposed, |
| * and <code>false</code> otherwise. |
| * <p> |
| * This method gets the dispose state for the widget. |
| * When a widget has been disposed, it is an error to |
| * invoke any other method using the widget. |
| * </p> |
| * |
| * @return <code>true</code> when the widget is disposed and <code>false</code> otherwise |
| */
|
| public boolean isDisposed () {
|
| if (handle != 0) return false;
|
| if ((state & HANDLE) != 0) return true;
|
| return (state & DISPOSED) != 0;
|
| }
|
| /**
|
| * Return the listening state.
|
| * <p>
|
| * Returns true if there is a listener, listening for the eventType.
|
| * Otherwise, returns false.
|
| *
|
| * @param eventType the type of event
|
| * @return true if the event is hooked
|
| *
|
| * @exception SWTError <ul>
|
| * <li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
|
| * <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
|
| * <li>ERROR_NULL_ARGUMENT when the name is null</li>
|
| * </ul>
|
| */
|
| protected boolean isListening (int eventType) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| return hooks (eventType);
|
| }
|
| boolean isValidSubclass () {
|
| return Display.isValidClass (getClass ());
|
| }
|
| boolean isValidThread () {
|
| return getDisplay ().isValidThread ();
|
| }
|
| boolean isValidWidget () {
|
| if (handle != 0) return true;
|
| if ((state & HANDLE) != 0) return false;
|
| return (state & DISPOSED) == 0;
|
| }
|
| void manageChildren () {
|
| /* Do nothing */
|
| }
|
| char mbcsToWcs (char ch) {
|
| int key = ch & 0xFFFF;
|
| if (key <= 0x7F) return ch;
|
| byte [] buffer;
|
| if (key <= 0xFF) {
|
| buffer = new byte [1];
|
| buffer [0] = (byte) key;
|
| } else {
|
| buffer = new byte [2];
|
| buffer [0] = (byte) ((key >> 8) & 0xFF);
|
| buffer [1] = (byte) (key & 0xFF);
|
| }
|
| char [] result = Converter.mbcsToWcs (null, buffer);
|
| if (result.length == 0) return 0;
|
| return result [0];
|
| }
|
| /** |
| * Notifies all of the receiver's listeners for events |
| * of the given type that one such event has occurred by |
| * invoking their <code>handleEvent()</code> method. |
| * |
| * @param eventType the type of event which has occurred |
| * @param event the event data |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the event is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */
|
| public void notifyListeners (int eventType, Event event) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (event == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (eventTable == null) return;
|
| event.type = eventType;
|
| event.widget = this;
|
| eventTable.sendEvent (event);
|
| }
|
| void postEvent (int eventType) {
|
| if (eventTable == null) return;
|
| postEvent (eventType, new Event ());
|
| }
|
| void postEvent (int eventType, Event event) {
|
| if (eventTable == null) return;
|
| event.type = eventType;
|
| event.widget = this;
|
| Display display = getDisplay ();
|
| if (event.time == 0) {
|
| event.time = OS.XtLastTimestampProcessed (display.xDisplay);
|
| }
|
| display.postEvent (event);
|
| }
|
| int processArm (int callData) {
|
| return 0;
|
| }
|
| int processDispose (int callData) {
|
| return 0;
|
| }
|
| int processDefaultSelection (int callData) {
|
| return 0;
|
| }
|
| int processEvent (int eventNumber, int callData) {
|
| switch (eventNumber) {
|
| case SWT.Arm: return processArm (callData);
|
| case SWT.Dispose: return processDispose (callData);
|
| case SWT.DefaultSelection: return processDefaultSelection (callData);
|
| case SWT.FocusIn: return processSetFocus (callData);
|
| case SWT.Help: return processHelp (callData);
|
| case SWT.Hide: return processHide (callData);
|
| case SWT.KeyDown: return processKeyDown (callData);
|
| case SWT.KeyUp: return processKeyUp (callData);
|
| case SWT.Modify: return processModify (callData);
|
| case SWT.MouseDown: return processMouseDown (callData);
|
| case SWT.MouseEnter: return processMouseEnter (callData);
|
| case SWT.MouseExit: return processMouseExit (callData);
|
| case SWT.MouseHover: return processMouseHover (callData);
|
| case SWT.MouseMove: return processMouseMove (callData);
|
| case SWT.MouseUp: return processMouseUp (callData);
|
| case SWT.Paint: return processPaint (callData);
|
| case SWT.Resize: return processResize (callData);
|
| case SWT.Show: return processShow (callData);
|
| case SWT.Selection: return processSelection (callData);
|
| case SWT.Verify: return processVerify (callData);
|
| case -1: return processNonMaskable (callData);
|
| }
|
| return 0;
|
| }
|
| int processHelp (int callData) {
|
| return 0;
|
| }
|
| int processHide (int callData) {
|
| return 0;
|
| }
|
| int processKeyDown (int callData) {
|
| return 0;
|
| }
|
| int processKeyUp (int callData) {
|
| return 0;
|
| }
|
| int processModify (int callData) {
|
| return 0;
|
| }
|
| int processMouseDown (int callData) {
|
| return 0;
|
| }
|
| int processMouseEnter (int callData) {
|
| return 0;
|
| }
|
| int processMouseExit (int callData) {
|
| return 0;
|
| }
|
| int processMouseHover (int id) {
|
| return 0;
|
| }
|
| int processMouseMove (int callData) {
|
| return 0;
|
| }
|
| int processMouseUp (int callData) {
|
| return 0;
|
| }
|
| int processNonMaskable (int callData) {
|
| return 0;
|
| }
|
| int processPaint (int callData) {
|
| return 0;
|
| }
|
| int processResize (int callData) {
|
| return 0;
|
| }
|
| int processSelection (int callData) {
|
| return 0;
|
| }
|
| int processSetFocus (int callData) {
|
| return 0;
|
| }
|
| int processShow (int callData) {
|
| return 0;
|
| }
|
| int processVerify (int callData) {
|
| return 0;
|
| }
|
| void register () {
|
| if (handle == 0) return;
|
| WidgetTable.put (handle, this);
|
| }
|
| void releaseChild () {
|
| /* Do nothing */
|
| }
|
| void releaseHandle () {
|
| handle = 0;
|
| state |= DISPOSED;
|
| }
|
| void releaseWidget () {
|
| sendEvent (SWT.Dispose);
|
| deregister ();
|
| eventTable = null;
|
| data = null;
|
| keys = null;
|
| values = null;
|
| }
|
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notifed when an event of the given type occurs. |
| * |
| * @param eventType the type of event to listen for |
| * @param listener the listener which should no longer be notified when the event occurs |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see Listener |
| * @see #addListener |
| */
|
| public void removeListener (int eventType, Listener handler) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (handler == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (eventTable == null) return;
|
| eventTable.unhook (eventType, handler);
|
| }
|
| /**
|
| * Warning: API under construction.
|
| */
|
| protected void removeListener (int eventType, EventListener handler) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (handler == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (eventTable == null) return;
|
| eventTable.unhook (eventType, handler);
|
| }
|
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notifed when the widget is disposed. |
| * |
| * @param listener the listener which should no longer be notified when the receiver is disposed |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see DisposeListener |
| * @see #removeDisposeListener |
| */
|
| public void removeDisposeListener (DisposeListener listener) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
|
| if (eventTable == null) return;
|
| eventTable.unhook (SWT.Dispose, listener);
|
| }
|
| void sendEvent (int eventType) {
|
| if (eventTable == null) return;
|
| sendEvent (eventType, new Event ());
|
| }
|
| void sendEvent (int eventType, Event event) {
|
| if (eventTable == null) return;
|
| event.type = eventType;
|
| event.widget = this;
|
| if (event.time == 0) {
|
| Display display = getDisplay ();
|
| event.time = OS.XtLastTimestampProcessed (display.xDisplay);
|
| }
|
| eventTable.sendEvent (event);
|
| }
|
| /** |
| * Sets the application defined widget data associated |
| * with the receiver to be the argument. The <em>widget |
| * data</em> is a single, unnamed field that is stored |
| * with every widget. |
| * <p> |
| * Applications may put arbitrary objects in this field. If |
| * the object stored in the widget data needs to be notified |
| * when the widget is disposed of, it is the application's |
| * responsibility to hook the Dispose event on the widget and |
| * do so. |
| * </p> |
| * |
| * @param data the widget data |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li> |
| * </ul> |
| */
|
| public void setData (Object data) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| this.data = data;
|
| }
|
|
|
| /** |
| * Sets the application defined property of the receiver |
| * with the specified name to the given value. |
| * <p> |
| * Applications may associate arbitrary objects with the |
| * receiver in this fashion. If the objects stored in the |
| * properties need to be notified when the widget is disposed |
| * of, it is the application's responsibility to hook the |
| * Dispose event on the widget and do so. |
| * </p> |
| * |
| * @param key the name of the property |
| * @param value the new value for the property |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the key is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getData |
| */
|
| public void setData (String key, Object value) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (key == null) error (SWT.ERROR_NULL_ARGUMENT);
|
|
|
| /* Remove the key/value pair */
|
| if (value == null) {
|
| if (keys == null) return;
|
| int index = 0;
|
| while (index < keys.length && !keys [index].equals (key)) index++;
|
| if (index == keys.length) return;
|
| if (keys.length == 1) {
|
| keys = null;
|
| values = null;
|
| } else {
|
| String [] newKeys = new String [keys.length - 1];
|
| Object [] newValues = new Object [values.length - 1];
|
| System.arraycopy (keys, 0, newKeys, 0, index);
|
| System.arraycopy (keys, index + 1, newKeys, index, newKeys.length - index);
|
| System.arraycopy (values, 0, newValues, 0, index);
|
| System.arraycopy (values, index + 1, newValues, index, newValues.length - index);
|
| keys = newKeys;
|
| values = newValues;
|
| }
|
| return;
|
| }
|
|
|
| /* Add the key/value pair */
|
| if (keys == null) {
|
| keys = new String [] {key};
|
| values = new Object [] {value};
|
| return;
|
| }
|
| for (int i=0; i<keys.length; i++) {
|
| if (keys [i].equals (key)) {
|
| values [i] = value;
|
| return;
|
| }
|
| }
|
| String [] newKeys = new String [keys.length + 1];
|
| Object [] newValues = new Object [values.length + 1];
|
| System.arraycopy (keys, 0, newKeys, 0, keys.length);
|
| System.arraycopy (values, 0, newValues, 0, values.length);
|
| newKeys [keys.length] = key;
|
| newValues [values.length] = value;
|
| keys = newKeys;
|
| values = newValues;
|
| }
|
|
|
| /** |
| * Returns a string containing a concise, human-readable |
| * description of the receiver. |
| * |
| * @return a string representation of the receiver |
| */
|
| public String toString () {
|
| String string = "*Disposed*";
|
| if (!isDisposed ()) {
|
| string = "*Wrong Thread*";
|
| if (isValidThread ()) string = getNameText ();
|
| }
|
| return getName () + " {" + string + "}";
|
| }
|
| int topHandle () {
|
| return handle;
|
| }
|
| char wcsToMbcs (char ch) {
|
| int key = ch & 0xFFFF;
|
| if (key <= 0x7F) return ch;
|
| byte [] buffer = Converter.wcsToMbcs (null, new char [] {ch}, false);
|
| if (buffer.length == 1) return (char) buffer [0];
|
| if (buffer.length == 2) {
|
| return (char) (((buffer [0] & 0xFF) << 8) | (buffer [1] & 0xFF));
|
| }
|
| return 0;
|
| }
|
| }
|