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 = '&'; | |
/* DBCS flags */ | |
static final boolean IsDBLocale; | |
static { | |
IsDBLocale = OS.MB_CUR_MAX () != 1; | |
} | |
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) { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
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); | |
if (parent.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT); | |
} | |
/** | |
* 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 (isDisposed ()) 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 (isDisposed()) return; | |
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS); | |
releaseChild (); | |
releaseWidget (); | |
destroyWidget (); | |
} | |
void enableHandle (boolean enabled, int widgetHandle) { | |
int [] argList = {OS.XmNsensitive, enabled ? 1 : 0}; | |
OS.XtSetValues (widgetHandle, argList, argList.length / 2); | |
} | |
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 () { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
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 () { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
return hooks (eventType); | |
} | |
boolean isValidSubclass () { | |
return Display.isValidClass (getClass ()); | |
} | |
boolean isValidThread () { | |
return getDisplay ().isValidThread (); | |
} | |
void manageChildren () { | |
/* Do nothing */ | |
} | |
char mbcsToWcs (char ch) { | |
return mbcsToWcs (ch, null); | |
} | |
char mbcsToWcs (char ch, String codePage) { | |
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 (codePage, 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) { | |
checkWidget(); | |
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 propagateHandle (boolean enabled, int widgetHandle) { | |
int xDisplay = OS.XtDisplay (widgetHandle); | |
if (xDisplay == 0) return; | |
int xWindow = OS.XtWindow (widgetHandle); | |
if (xWindow == 0) return; | |
/* | |
* Get the event mask from the widget. The event mask | |
* returned by XtBuildEventMask () includes the masks | |
* associated with all callbacks and event handlers | |
* that have been hooked on the widget. | |
*/ | |
int event_mask = OS.XtBuildEventMask (widgetHandle); | |
int do_not_propagate_mask = | |
OS.KeyPressMask | OS.KeyReleaseMask | OS.ButtonPressMask | | |
OS.ButtonReleaseMask | OS.PointerMotionMask; | |
if (!enabled) { | |
/* | |
* Attempting to propogate EnterWindowMask and LeaveWindowMask | |
* causes an X error so these must be specially cleared out from | |
* the event mask, not included in the propogate mask. | |
*/ | |
event_mask &= ~(do_not_propagate_mask | OS.EnterWindowMask | OS.LeaveWindowMask); | |
do_not_propagate_mask = 0; | |
} | |
XSetWindowAttributes attributes = new XSetWindowAttributes (); | |
attributes.event_mask = event_mask; | |
attributes.do_not_propagate_mask = do_not_propagate_mask; | |
OS.XChangeWindowAttributes (xDisplay, xWindow, OS.CWDontPropagate | OS.CWEventMask, attributes); | |
int [] argList = {OS.XmNtraversalOn, enabled ? 1 : 0}; | |
OS.XtSetValues (widgetHandle, argList, argList.length / 2); | |
} | |
void redrawHandle (int x, int y, int width, int height, int widgetHandle) { | |
int display = OS.XtDisplay (widgetHandle); | |
if (display == 0) return; | |
int window = OS.XtWindow (widgetHandle); | |
if (window == 0) return; | |
int [] argList = {OS.XmNborderWidth, 0, OS.XmNborderColor, 0}; | |
OS.XtGetValues (widgetHandle, argList, argList.length / 2); | |
if (argList [1] != 0) { | |
/* Force the border to repaint by setting the color */ | |
OS.XtSetValues (widgetHandle, argList, argList.length / 2); | |
} | |
OS.XClearArea (display, window, x, y, width, height, true); | |
} | |
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) { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
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 setInputState (Event event, XInputEvent xEvent) { | |
if ((xEvent.state & OS.Mod1Mask) != 0) event.stateMask |= SWT.ALT; | |
if ((xEvent.state & OS.ShiftMask) != 0) event.stateMask |= SWT.SHIFT; | |
if ((xEvent.state & OS.ControlMask) != 0) event.stateMask |= SWT.CONTROL; | |
if ((xEvent.state & OS.Button1Mask) != 0) event.stateMask |= SWT.BUTTON1; | |
if ((xEvent.state & OS.Button2Mask) != 0) event.stateMask |= SWT.BUTTON2; | |
if ((xEvent.state & OS.Button3Mask) != 0) event.stateMask |= SWT.BUTTON3; | |
} | |
void setKeyState (Event event, XKeyEvent xEvent) { | |
if (xEvent.keycode != 0) { | |
byte [] buffer1 = new byte [1]; | |
int [] keysym = new int [1]; | |
if (OS.XLookupString (xEvent, buffer1, buffer1.length, keysym, null) == 0) { | |
/* | |
* Bug in MOTIF. On Solaris only, XK_F11 and XK_F12 are not | |
* translated correctly by XLookupString(). They are mapped | |
* to 0x1005FF10 and 0x1005FF11 respectively. The fix is to | |
* look for these values explicitly and correct them. | |
*/ | |
if (OS.IsSunOS) { | |
if ((keysym [0] == 0x1005FF10) || (keysym [0] == 0x1005FF11)) { | |
if (keysym [0] == 0x1005FF10) keysym [0] = OS.XK_F11; | |
if (keysym [0] == 0x1005FF11) keysym [0] = OS.XK_F12; | |
} | |
} | |
/* | |
* Bug in MOTIF. On Solaris only, their is garbage in the | |
* high 16-bits for Keysyms such as XK_Down. Since Keysyms | |
* must be 16-bits to fit into a Character, mask away the | |
* high 16-bits on all platforms. | |
*/ | |
event.keyCode = Display.translateKey (keysym [0] & 0xFFFF); | |
} else { | |
event.character = (char) buffer1 [0]; | |
} | |
} | |
setInputState (event, xEvent); | |
} | |
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) { | |
checkWidget(); | |
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) { | |
checkWidget(); | |
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) { | |
return wcsToMbcs (ch, null); | |
} | |
char wcsToMbcs (char ch, String codePage) { | |
int key = ch & 0xFFFF; | |
if (key <= 0x7F) return ch; | |
byte [] buffer = Converter.wcsToMbcs (codePage, 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; | |
} | |
} |