| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.win32.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * 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 { |
| int style, state; |
| Display display; |
| EventTable eventTable; |
| Object data; |
| |
| /* Global state flags */ |
| static final int DISPOSED = 1<<0; |
| static final int CANVAS = 1<<1; |
| static final int KEYED_DATA = 1<<2; |
| static final int DISABLED = 1<<3; |
| static final int HIDDEN = 1<<4; |
| |
| /* A layout was requested on this widget */ |
| static final int LAYOUT_NEEDED = 1<<5; |
| |
| /* The preferred size of a child has changed */ |
| static final int LAYOUT_CHANGED = 1<<6; |
| |
| /* A layout was requested in this widget hierachy */ |
| static final int LAYOUT_CHILD = 1<<7; |
| |
| /* More global state flags */ |
| static final int TRANSPARENT = 1<<8; |
| static final int RELEASED = 1<<9; |
| static final int DISPOSE_SENT = 1<<10; |
| |
| /* Default size for widgets */ |
| static final int DEFAULT_WIDTH = 64; |
| static final int DEFAULT_HEIGHT = 64; |
| |
| /* Check and initialize the Common Controls DLL */ |
| static final int MAJOR = 5, MINOR = 80; |
| static { |
| if (!OS.IsWinCE) { |
| if (OS.COMCTL32_VERSION < OS.VERSION (MAJOR, MINOR)) { |
| System.out.println ("***WARNING: SWT requires comctl32.dll version " + MAJOR + "." + MINOR + " or greater"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ |
| System.out.println ("***WARNING: Detected: " + OS.COMCTL32_MAJOR + "." + OS.COMCTL32_MINOR); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| } |
| OS.InitCommonControls (); |
| } |
| |
| /** |
| * Prevents uninitialized instances from being created outside the package. |
| */ |
| Widget () { |
| } |
| |
| /** |
| * 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 |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </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> |
| * <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</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) { |
| checkSubclass (); |
| checkParent (parent); |
| this.style = style; |
| display = parent.display; |
| } |
| |
| /** |
| * 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 |
| * @see #notifyListeners |
| */ |
| public void addListener (int eventType, Listener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) eventTable = new EventTable (); |
| eventTable.hook (eventType, listener); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| int callWindowProc (int hwnd, int msg, int wParam, int lParam) { |
| return 0; |
| } |
| |
| /** |
| * Returns a style with exactly one style bit set out of |
| * the specified set of exclusive style bits. All other |
| * possible bits are cleared when the first matching bit |
| * is found. Bits that are not part of the possible set |
| * are untouched. |
| * |
| * @param style the original style bits |
| * @param int0 the 0th possible style bit |
| * @param int1 the 1st possible style bit |
| * @param int2 the 2nd possible style bit |
| * @param int3 the 3rd possible style bit |
| * @param int4 the 4th possible style bit |
| * @param int5 the 5th possible style bit |
| * |
| * @return the new style bits |
| */ |
| 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 checkOrientation (Widget parent) { |
| style &= ~SWT.MIRRORED; |
| if ((style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT)) == 0) { |
| if (parent != null) { |
| if ((parent.style & SWT.LEFT_TO_RIGHT) != 0) style |= SWT.LEFT_TO_RIGHT; |
| if ((parent.style & SWT.RIGHT_TO_LEFT) != 0) style |= SWT.RIGHT_TO_LEFT; |
| } |
| } |
| style = checkBits (style, SWT.LEFT_TO_RIGHT, SWT.RIGHT_TO_LEFT, 0, 0, 0, 0); |
| } |
| |
| void checkOpened () { |
| /* Do nothing */ |
| } |
| |
| /** |
| * Throws an exception if the specified widget can not be |
| * used as a parent for the receiver. |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * </ul> |
| */ |
| void checkParent (Widget parent) { |
| if (parent == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (parent.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| parent.checkWidget (); |
| parent.checkOpened (); |
| } |
| |
| /** |
| * Checks that this class can be subclassed. |
| * <p> |
| * The SWT class library is intended to be subclassed |
| * only at specific, controlled points (most notably, |
| * <code>Composite</code> and <code>Canvas</code> when |
| * implementing new widgets). This method enforces this |
| * rule unless it is overridden. |
| * </p><p> |
| * <em>IMPORTANT:</em> By providing an implementation of this |
| * method that allows a subclass of a class which does not |
| * normally allow subclassing to be created, the implementer |
| * agrees to be fully responsible for the fact that any such |
| * subclass will likely fail between SWT releases and will be |
| * strongly platform specific. No support is provided for |
| * user-written classes which are implemented in this fashion. |
| * </p><p> |
| * The ability to subclass outside of the allowed SWT classes |
| * is intended purely to enable those not on the SWT development |
| * team to implement patches in order to get around specific |
| * limitations in advance of when those limitations can be |
| * addressed by the team. Subclassing should not be attempted |
| * without an intimate and detailed understanding of the hierarchy. |
| * </p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| */ |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| /** |
| * Throws an <code>SWTException</code> if the receiver can not |
| * be accessed by the caller. This may include both checks on |
| * the state of the receiver and more generally on the entire |
| * execution context. This method <em>should</em> be called by |
| * widget implementors to enforce the standard SWT invariants. |
| * <p> |
| * Currently, it is an error to invoke any method (other than |
| * <code>isDisposed()</code>) on a widget that has had its |
| * <code>dispose()</code> method called. It is also an error |
| * to call widget methods from any thread that is different |
| * from the thread that created the widget. |
| * </p><p> |
| * In future releases of SWT, there may be more or fewer error |
| * checks and exceptions may be thrown for different reasons. |
| * </p> |
| * |
| * @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> |
| */ |
| protected void checkWidget () { |
| Display display = this.display; |
| if (display == null) error (SWT.ERROR_WIDGET_DISPOSED); |
| if (display.thread != Thread.currentThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS); |
| if ((state & DISPOSED) != 0) error (SWT.ERROR_WIDGET_DISPOSED); |
| } |
| |
| /** |
| * Destroys the widget in the operating system and releases |
| * the widget's handle. If the widget does not have a handle, |
| * this method may hide the widget, mark the widget as destroyed |
| * or do nothing, depending on the widget. |
| * <p> |
| * When a widget is destroyed in the operating system, its |
| * descendents are also destroyed by the operating system. |
| * This means that it is only necessary to call <code>destroyWidget</code> |
| * on the root of the widget tree. |
| * </p><p> |
| * This method is called after <code>releaseWidget</code>. |
| * </p> |
| * @see #dispose |
| * @see #releaseChild |
| * @see #releaseWidget |
| * @see #releaseHandle |
| */ |
| void destroyWidget () { |
| releaseHandle (); |
| } |
| |
| int DeferWindowPos(int hWinPosInfo, int hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags){ |
| if (OS.IsWinCE) { |
| /* |
| * Feature in Windows. On Windows CE, DeferWindowPos always causes |
| * a WM_SIZE message, even when the new size is the same as the old |
| * size. The fix is to detect that the size has not changed and set |
| * SWP_NOSIZE. |
| */ |
| if ((uFlags & OS.SWP_NOSIZE) == 0) { |
| RECT lpRect = new RECT (); |
| OS.GetWindowRect (hWnd, lpRect); |
| if (cy == lpRect.bottom - lpRect.top && cx == lpRect.right - lpRect.left) { |
| /* |
| * Feature in Windows. On Windows CE, DeferWindowPos when called |
| * with SWP_DRAWFRAME always causes a WM_SIZE message, even |
| * when SWP_NOSIZE is set and when the new size is the same as the |
| * old size. The fix is to clear SWP_DRAWFRAME when the size is |
| * the same. |
| */ |
| uFlags &= ~OS.SWP_DRAWFRAME; |
| uFlags |= OS.SWP_NOSIZE; |
| } |
| } |
| } |
| return OS.DeferWindowPos (hWinPosInfo, hWnd, hWndInsertAfter, X, Y, cx, cy, uFlags); |
| } |
| |
| /** |
| * 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); |
| release (true); |
| } |
| |
| /** |
| * Does whatever widget specific cleanup is required, and then |
| * uses the code in <code>SWTError.error</code> to handle the error. |
| * |
| * @param code the descriptive error code |
| * |
| * @see SWT#error(int) |
| */ |
| void error (int code) { |
| SWT.error(code); |
| } |
| |
| boolean filters (int eventType) { |
| return display.filters (eventType); |
| } |
| |
| Widget findItem (int id) { |
| return null; |
| } |
| |
| char [] fixMnemonic (String string) { |
| char [] buffer = new char [string.length ()]; |
| string.getChars (0, string.length (), buffer, 0); |
| int i = 0, j = 0; |
| while (i < buffer.length) { |
| if (buffer [i] == '&') { |
| if (i + 1 < buffer.length && buffer [i + 1] == '&') { |
| buffer [j++] = ' '; |
| i++; |
| } |
| i++; |
| } else { |
| buffer [j++] = buffer [i++]; |
| } |
| } |
| while (j < buffer.length) buffer [j++] = 0; |
| return buffer; |
| } |
| |
| /** |
| * 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(Object) |
| */ |
| public Object getData () { |
| checkWidget(); |
| return (state & KEYED_DATA) != 0 ? ((Object []) data) [0] : 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(String, Object) |
| */ |
| public Object getData (String key) { |
| checkWidget(); |
| if (key == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if ((state & KEYED_DATA) != 0) { |
| Object [] table = (Object []) data; |
| for (int i=1; i<table.length; i+=2) { |
| if (key.equals (table [i])) return table [i+1]; |
| } |
| } |
| 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> |
| * </ul> |
| */ |
| public Display getDisplay () { |
| Display display = this.display; |
| if (display == null) error (SWT.ERROR_WIDGET_DISPOSED); |
| return display; |
| } |
| |
| Menu getMenu () { |
| return null; |
| } |
| |
| /** |
| * Returns the name of the widget. This is the name of |
| * the class without the package name. |
| * |
| * @return the name of the widget |
| */ |
| String getName () { |
| String string = getClass ().getName (); |
| int index = string.lastIndexOf ('.'); |
| if (index == -1) return string; |
| return string.substring (index + 1, string.length ()); |
| } |
| |
| /* |
| * Returns a short printable representation for the contents |
| * of a widget. For example, a button may answer the label |
| * text. This is used by <code>toString</code> to provide a |
| * more meaningful description of the widget. |
| * |
| * @return the contents string for the widget |
| * |
| * @see #toString |
| */ |
| String getNameText () { |
| return ""; //$NON-NLS-1$ |
| } |
| |
| /** |
| * 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; |
| } |
| |
| /* |
| * Returns <code>true</code> if the specified eventType is |
| * hooked, and <code>false</code> otherwise. Implementations |
| * of SWT can avoid creating objects and sending events |
| * when an event happens in the operating system but |
| * there are no listeners hooked for the event. |
| * |
| * @param eventType the event to be checked |
| * |
| * @return <code>true</code> when the eventType is hooked and <code>false</code> otherwise |
| * |
| * @see #isListening |
| */ |
| 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 () { |
| return (state & DISPOSED) != 0; |
| } |
| |
| /** |
| * Returns <code>true</code> if there are any listeners |
| * for the specified event type associated with the receiver, |
| * and <code>false</code> otherwise. |
| * |
| * @param eventType the type of event |
| * @return true if the event is hooked |
| * |
| * @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 boolean isListening (int eventType) { |
| checkWidget(); |
| return hooks (eventType); |
| } |
| |
| /* |
| * Returns <code>true</code> when subclassing is |
| * allowed and <code>false</code> otherwise |
| * |
| * @return <code>true</code> when subclassing is allowed and <code>false</code> otherwise |
| */ |
| boolean isValidSubclass () { |
| return Display.isValidClass (getClass ()); |
| } |
| |
| /* |
| * Returns <code>true</code> when the current thread is |
| * the thread that created the widget and <code>false</code> |
| * otherwise. |
| * |
| * @return <code>true</code> when the current thread is the thread that created the widget and <code>false</code> otherwise |
| */ |
| boolean isValidThread () { |
| return getDisplay ().isValidThread (); |
| } |
| |
| void mapEvent (int hwnd, Event event) { |
| } |
| |
| GC new_GC (GCData data) { |
| return null; |
| } |
| |
| /** |
| * 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 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 #addListener |
| * @see #removeListener |
| |
| */ |
| public void notifyListeners (int eventType, Event event) { |
| checkWidget(); |
| if (event == null) event = new Event (); |
| sendEvent (eventType, event); |
| } |
| |
| void postEvent (int eventType) { |
| sendEvent (eventType, null, false); |
| } |
| |
| void postEvent (int eventType, Event event) { |
| sendEvent (eventType, event, false); |
| } |
| |
| /* |
| * Releases the widget hiearchy and optionally destroys |
| * the receiver. |
| * <p> |
| * Typically, a widget with children will broadcast this |
| * message to all children so that they too can release their |
| * resources. The <code>releaseHandle</code> method is used |
| * as part of this broadcast to zero the handle fields of the |
| * children without calling <code>destroyWidget</code>. In |
| * this scenario, the children are actually destroyed later, |
| * when the operating system destroys the widget tree. |
| * </p> |
| * |
| * @param destroy indicates that the receiver should be destroyed |
| * |
| * @see #dispose |
| * @see #releaseHandle |
| * @see #releaseParent |
| * @see #releaseWidget |
| */ |
| void release (boolean destroy) { |
| if ((state & DISPOSE_SENT) == 0) { |
| state |= DISPOSE_SENT; |
| sendEvent (SWT.Dispose); |
| } |
| if ((state & DISPOSED) == 0) { |
| releaseChildren (destroy); |
| } |
| if ((state & RELEASED) == 0) { |
| state |= RELEASED; |
| if (destroy) { |
| releaseParent (); |
| releaseWidget (); |
| destroyWidget (); |
| } else { |
| releaseWidget (); |
| releaseHandle (); |
| } |
| } |
| } |
| |
| void releaseChildren (boolean destroy) { |
| } |
| |
| /* |
| * Releases the widget's handle by zero'ing it out. |
| * Does not destroy or release any operating system |
| * resources. |
| * <p> |
| * This method is called after <code>releaseWidget</code> |
| * or from <code>destroyWidget</code> when a widget is being |
| * destroyed to ensure that the widget is marked as destroyed |
| * in case the act of destroying the widget in the operating |
| * system causes application code to run in callback that |
| * could access the widget. |
| * </p> |
| * |
| * @see #dispose |
| * @see #releaseChildren |
| * @see #releaseParent |
| * @see #releaseWidget |
| */ |
| void releaseHandle () { |
| state |= DISPOSED; |
| display = null; |
| } |
| |
| /* |
| * Releases the receiver, a child in a widget hierarchy, |
| * from its parent. |
| * <p> |
| * When a widget is destroyed, it may be necessary to remove |
| * it from an internal data structure of the parent. When |
| * a widget has no handle, it may also be necessary for the |
| * parent to hide the widget or otherwise indicate that the |
| * widget has been disposed. For example, disposing a menu |
| * bar requires that the menu bar first be released from the |
| * shell when the menu bar is active. |
| * </p> |
| * |
| * @see #dispose |
| * @see #releaseChildren |
| * @see #releaseWidget |
| * @see #releaseHandle |
| */ |
| void releaseParent () { |
| } |
| |
| /* |
| * Releases any internal resources back to the operating |
| * system and clears all fields except the widget handle. |
| * <p> |
| * When a widget is destroyed, resources that were acquired |
| * on behalf of the programmer need to be returned to the |
| * operating system. For example, if the widget made a |
| * copy of an icon, supplied by the programmer, this copy |
| * would be freed in <code>releaseWidget</code>. Also, |
| * to assist the garbage collector and minimize the amount |
| * of memory that is not reclaimed when the programmer keeps |
| * a reference to a disposed widget, all fields except the |
| * handle are zero'd. The handle is needed by <code>destroyWidget</code>. |
| * </p> |
| * |
| * @see #dispose |
| * @see #releaseChildren |
| * @see #releaseHandle |
| * @see #releaseParent |
| */ |
| void releaseWidget () { |
| eventTable = null; |
| data = 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 |
| * @see #notifyListeners |
| */ |
| public void removeListener (int eventType, Listener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (eventType, listener); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notifed when an event of the given type occurs. |
| * <p> |
| * <b>IMPORTANT:</b> This method is <em>not</em> part of the SWT |
| * public API. It is marked public only so that it can be shared |
| * within the packages provided by SWT. It should never be |
| * referenced from application code. |
| * </p> |
| * |
| * @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 |
| */ |
| protected void removeListener (int eventType, SWTEventListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (eventType, listener); |
| } |
| |
| /** |
| * 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 #addDisposeListener |
| */ |
| 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 (Event event) { |
| Display display = event.display; |
| if (!display.filterEvent (event)) { |
| if (eventTable != null) eventTable.sendEvent (event); |
| } |
| } |
| |
| void sendEvent (int eventType) { |
| sendEvent (eventType, null, true); |
| } |
| |
| void sendEvent (int eventType, Event event) { |
| sendEvent (eventType, event, true); |
| } |
| |
| void sendEvent (int eventType, Event event, boolean send) { |
| if (eventTable == null && !display.filters (eventType)) { |
| return; |
| } |
| if (event == null) event = new Event (); |
| event.type = eventType; |
| event.display = display; |
| event.widget = this; |
| if (event.time == 0) { |
| event.time = display.getLastEventTime (); |
| } |
| if (send) { |
| sendEvent (event); |
| } else { |
| display.postEvent (event); |
| } |
| } |
| |
| boolean sendKeyEvent (int type, int msg, int wParam, int lParam) { |
| Event event = new Event (); |
| if (!setKeyState (event, type, wParam, lParam)) return true; |
| return sendKeyEvent (type, msg, wParam, lParam, event); |
| } |
| |
| boolean sendKeyEvent (int type, int msg, int wParam, int lParam, Event event) { |
| sendEvent (type, event); |
| if (isDisposed ()) return false; |
| return event.doit; |
| } |
| |
| boolean sendMouseEvent (int type, int button, int hwnd, int msg, int wParam, int lParam) { |
| return sendMouseEvent (type, button, 0, 0, false, hwnd, msg, wParam, lParam); |
| } |
| |
| boolean sendMouseEvent (int type, int button, int count, int detail, boolean send, int hwnd, int msg, int wParam, int lParam) { |
| if (!hooks (type) && !filters (type)) return true; |
| Event event = new Event (); |
| event.button = button; |
| event.detail = detail; |
| event.count = count; |
| event.x = (short) (lParam & 0xFFFF); |
| event.y = (short) (lParam >> 16); |
| setInputState (event, type); |
| mapEvent (hwnd, event); |
| if (send) { |
| sendEvent (type, event); |
| if (isDisposed ()) return false; |
| } else { |
| postEvent (type, event); |
| } |
| return event.doit; |
| } |
| |
| /** |
| * 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> |
| * |
| * @see #getData() |
| */ |
| public void setData (Object data) { |
| checkWidget(); |
| if ((state & KEYED_DATA) != 0) { |
| ((Object []) this.data) [0] = data; |
| } else { |
| 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(String) |
| */ |
| public void setData (String key, Object value) { |
| checkWidget(); |
| if (key == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int index = 1; |
| Object [] table = null; |
| if ((state & KEYED_DATA) != 0) { |
| table = (Object []) data; |
| while (index < table.length) { |
| if (key.equals (table [index])) break; |
| index += 2; |
| } |
| } |
| if (value != null) { |
| if ((state & KEYED_DATA) != 0) { |
| if (index == table.length) { |
| Object [] newTable = new Object [table.length + 2]; |
| System.arraycopy (table, 0, newTable, 0, table.length); |
| data = table = newTable; |
| } |
| } else { |
| table = new Object [3]; |
| table [0] = data; |
| data = table; |
| state |= KEYED_DATA; |
| } |
| table [index] = key; |
| table [index + 1] = value; |
| } else { |
| if ((state & KEYED_DATA) != 0) { |
| if (index != table.length) { |
| int length = table.length - 2; |
| if (length == 1) { |
| data = table [0]; |
| state &= ~KEYED_DATA; |
| } else { |
| Object [] newTable = new Object [length]; |
| System.arraycopy (table, 0, newTable, 0, index); |
| System.arraycopy (table, index + 2, newTable, index, length - index); |
| data = newTable; |
| } |
| } |
| } |
| } |
| } |
| |
| boolean sendFocusEvent (int type) { |
| sendEvent (type); |
| // widget could be disposed at this point |
| return true; |
| } |
| |
| boolean setInputState (Event event, int type) { |
| if (OS.GetKeyState (OS.VK_MENU) < 0) event.stateMask |= SWT.ALT; |
| if (OS.GetKeyState (OS.VK_SHIFT) < 0) event.stateMask |= SWT.SHIFT; |
| if (OS.GetKeyState (OS.VK_CONTROL) < 0) event.stateMask |= SWT.CONTROL; |
| if (OS.GetKeyState (OS.VK_LBUTTON) < 0) event.stateMask |= SWT.BUTTON1; |
| if (OS.GetKeyState (OS.VK_MBUTTON) < 0) event.stateMask |= SWT.BUTTON2; |
| if (OS.GetKeyState (OS.VK_RBUTTON) < 0) event.stateMask |= SWT.BUTTON3; |
| if (OS.GetKeyState (OS.VK_XBUTTON1) < 0) event.stateMask |= SWT.BUTTON4; |
| if (OS.GetKeyState (OS.VK_XBUTTON2) < 0) event.stateMask |= SWT.BUTTON5; |
| switch (type) { |
| case SWT.MouseDown: |
| case SWT.MouseDoubleClick: |
| if (event.button == 1) event.stateMask &= ~SWT.BUTTON1; |
| if (event.button == 2) event.stateMask &= ~SWT.BUTTON2; |
| if (event.button == 3) event.stateMask &= ~SWT.BUTTON3; |
| if (event.button == 4) event.stateMask &= ~SWT.BUTTON4; |
| if (event.button == 5) event.stateMask &= ~SWT.BUTTON5; |
| break; |
| case SWT.MouseUp: |
| if (event.button == 1) event.stateMask |= SWT.BUTTON1; |
| if (event.button == 2) event.stateMask |= SWT.BUTTON2; |
| if (event.button == 3) event.stateMask |= SWT.BUTTON3; |
| if (event.button == 4) event.stateMask |= SWT.BUTTON4; |
| if (event.button == 5) event.stateMask |= SWT.BUTTON5; |
| break; |
| case SWT.KeyDown: |
| case SWT.Traverse: |
| if (event.keyCode == SWT.ALT) event.stateMask &= ~SWT.ALT; |
| if (event.keyCode == SWT.SHIFT) event.stateMask &= ~SWT.SHIFT; |
| if (event.keyCode == SWT.CONTROL) event.stateMask &= ~SWT.CONTROL; |
| break; |
| case SWT.KeyUp: |
| if (event.keyCode == SWT.ALT) event.stateMask |= SWT.ALT; |
| if (event.keyCode == SWT.SHIFT) event.stateMask |= SWT.SHIFT; |
| if (event.keyCode == SWT.CONTROL) event.stateMask |= SWT.CONTROL; |
| break; |
| } |
| return true; |
| } |
| |
| boolean setKeyState (Event event, int type, int wParam, int lParam) { |
| |
| /* |
| * Feature in Windows. When the user presses Ctrl+Backspace |
| * or Ctrl+Enter, Windows sends a WM_CHAR with Delete (0x7F) |
| * and '\n' instead of '\b' and '\r'. This is the correct |
| * platform behavior but is not portable. The fix is to detect |
| * these cases and convert the character. |
| */ |
| switch (display.lastAscii) { |
| case SWT.DEL: |
| if (display.lastKey == SWT.BS) display.lastAscii = SWT.BS; |
| break; |
| case SWT.LF: |
| if (display.lastKey == SWT.CR) display.lastAscii = SWT.CR; |
| break; |
| } |
| |
| /* |
| * Feature in Windows. When the user presses either the Enter |
| * key or the numeric keypad Enter key, Windows sends a WM_KEYDOWN |
| * with wParam=VK_RETURN in both cases. In order to distinguish |
| * between the keys, the extended key bit is tested. If the bit |
| * is set, assume that the numeric keypad Enter was pressed. |
| */ |
| if (display.lastKey == SWT.CR && display.lastAscii == SWT.CR) { |
| if ((lParam & 0x1000000) != 0) display.lastKey = SWT.KEYPAD_CR; |
| } |
| |
| if (display.lastVirtual) { |
| /* |
| * Feature in Windows. The virtual key VK_DELETE is not |
| * treated as both a virtual key and an ASCII key by Windows. |
| * Therefore, we will not receive a WM_CHAR for this key. |
| * The fix is to treat VK_DELETE as a special case and map |
| * the ASCII value explictly (Delete is 0x7F). |
| */ |
| if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F; |
| |
| /* |
| * Feature in Windows. When the user presses Ctrl+Pause, the |
| * VK_CANCEL key is generated and a WM_CHAR is sent with 0x03, |
| * possibly to allow an application to look for Ctrl+C and the |
| * the Break key at the same time. This is unexpected and |
| * unwanted. The fix is to detect the case and set the character |
| * to zero. |
| */ |
| if (display.lastKey == OS.VK_CANCEL) display.lastAscii = 0x0; |
| |
| event.keyCode = Display.translateKey (display.lastKey); |
| } else { |
| event.keyCode = display.lastKey; |
| } |
| if (display.lastAscii != 0 || display.lastNull) { |
| event.character = Display.mbcsToWcs ((char) display.lastAscii); |
| } |
| if (event.keyCode == 0 && event.character == 0) { |
| if (!display.lastNull) return false; |
| } |
| return setInputState (event, type); |
| } |
| |
| boolean SetWindowPos (int hWnd, int hWndInsertAfter, int X, int Y, int cx, int cy, int uFlags) { |
| if (OS.IsWinCE) { |
| /* |
| * Feature in Windows. On Windows CE, SetWindowPos() always causes |
| * a WM_SIZE message, even when the new size is the same as the old |
| * size. The fix is to detect that the size has not changed and set |
| * SWP_NOSIZE. |
| */ |
| if ((uFlags & OS.SWP_NOSIZE) == 0) { |
| RECT lpRect = new RECT (); |
| OS.GetWindowRect (hWnd, lpRect); |
| if (cy == lpRect.bottom - lpRect.top && cx == lpRect.right - lpRect.left) { |
| /* |
| * Feature in Windows. On Windows CE, SetWindowPos() when called |
| * with SWP_DRAWFRAME always causes a WM_SIZE message, even |
| * when SWP_NOSIZE is set and when the new size is the same as the |
| * old size. The fix is to clear SWP_DRAWFRAME when the size is |
| * the same. |
| */ |
| uFlags &= ~OS.SWP_DRAWFRAME; |
| uFlags |= OS.SWP_NOSIZE; |
| } |
| } |
| } |
| return OS.SetWindowPos (hWnd, hWndInsertAfter, X, Y, cx, cy, uFlags); |
| } |
| |
| boolean showMenu (int x, int y) { |
| Event event = new Event (); |
| event.x = x; |
| event.y = y; |
| sendEvent (SWT.MenuDetect, event); |
| if (!event.doit) return true; |
| Menu menu = getMenu (); |
| if (menu != null && !menu.isDisposed ()) { |
| if (x != event.x || y != event.y) { |
| menu.setLocation (event.x, event.y); |
| } |
| menu.setVisible (true); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * 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*"; //$NON-NLS-1$ |
| if (!isDisposed ()) { |
| string = "*Wrong Thread*"; //$NON-NLS-1$ |
| if (isValidThread ()) string = getNameText (); |
| } |
| return getName () + " {" + string + "}"; //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| LRESULT wmCaptureChanged (int hwnd, int wParam, int lParam) { |
| display.captureChanged = true; |
| return null; |
| } |
| |
| LRESULT wmChar (int hwnd, int wParam, int lParam) { |
| /* |
| * Do not report a lead byte as a key pressed. |
| */ |
| if (!OS.IsUnicode && OS.IsDBLocale) { |
| byte lead = (byte) (wParam & 0xFF); |
| if (OS.IsDBCSLeadByte (lead)) return null; |
| } |
| display.lastAscii = wParam; |
| display.lastNull = wParam == 0; |
| if (!sendKeyEvent (SWT.KeyDown, OS.WM_CHAR, wParam, lParam)) { |
| return LRESULT.ONE; |
| } |
| // widget could be disposed at this point |
| return null; |
| } |
| |
| LRESULT wmContextMenu (int hwnd, int wParam, int lParam) { |
| if (wParam != hwnd) return null; |
| |
| /* |
| * Feature in Windows. SHRecognizeGesture() sends an undocumented |
| * WM_CONTEXTMENU notification when the flag SHRG_NOTIFY_PARENT is |
| * not set. This causes the context menu to be displayed twice, |
| * once by the caller of SHRecognizeGesture() and once from this |
| * method. The fix is to ignore WM_CONTEXTMENU notifications on |
| * all WinCE platforms. |
| * |
| * NOTE: This only happens on WM2003. Previous WinCE versions did |
| * not support WM_CONTEXTMENU. |
| */ |
| if (OS.IsWinCE) return null; |
| |
| /* |
| * Feature in Windows. When the user presses WM_NCRBUTTONUP, |
| * a WM_CONTEXTMENU message is generated. This happens when |
| * the user releases the mouse over a scroll bar. Normally, |
| * window displays the default scrolling menu but applications |
| * can process WM_CONTEXTMENU to display a different menu. |
| * Typically, an application does not want to supply a special |
| * scroll menu. The fix is to look for a WM_CONTEXTMENU that |
| * originated from a mouse event and display the menu when the |
| * mouse was released in the client area. |
| */ |
| int x = 0, y = 0; |
| if (lParam != -1) { |
| POINT pt = new POINT (); |
| x = pt.x = (short) (lParam & 0xFFFF); |
| y = pt.y = (short) (lParam >> 16); |
| OS.ScreenToClient (hwnd, pt); |
| RECT rect = new RECT (); |
| OS.GetClientRect (hwnd, rect); |
| if (!OS.PtInRect (rect, pt)) return null; |
| } else { |
| int pos = OS.GetMessagePos (); |
| x = (short) (pos & 0xFFFF); |
| y = (short) (pos >> 16); |
| } |
| |
| /* Show the menu */ |
| return showMenu (x, y) ? LRESULT.ZERO : null; |
| } |
| |
| LRESULT wmIMEChar (int hwnd, int wParam, int lParam) { |
| Display display = this.display; |
| display.lastKey = 0; |
| display.lastAscii = wParam; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| if (!sendKeyEvent (SWT.KeyDown, OS.WM_IME_CHAR, wParam, lParam)) { |
| return LRESULT.ONE; |
| } |
| sendKeyEvent (SWT.KeyUp, OS.WM_IME_CHAR, wParam, lParam); |
| // widget could be disposed at this point |
| display.lastKey = display.lastAscii = 0; |
| return LRESULT.ONE; |
| } |
| |
| LRESULT wmKeyDown (int hwnd, int wParam, int lParam) { |
| |
| /* Ignore repeating modifier keys by testing key down state */ |
| switch (wParam) { |
| case OS.VK_SHIFT: |
| case OS.VK_MENU: |
| case OS.VK_CONTROL: |
| case OS.VK_CAPITAL: |
| case OS.VK_NUMLOCK: |
| case OS.VK_SCROLL: |
| if ((lParam & 0x40000000) != 0) return null; |
| } |
| |
| /* Clear last key and last ascii because a new key has been typed */ |
| display.lastAscii = display.lastKey = 0; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| |
| /* |
| * Do not report a lead byte as a key pressed. |
| */ |
| if (!OS.IsUnicode && OS.IsDBLocale) { |
| byte lead = (byte) (wParam & 0xFF); |
| if (OS.IsDBCSLeadByte (lead)) return null; |
| } |
| |
| /* Map the virtual key */ |
| /* |
| * Bug in WinCE. MapVirtualKey() returns incorrect values. |
| * The fix is to rely on a key mappings table to determine |
| * whether the key event must be sent now or if a WM_CHAR |
| * event will follow. The key mappings table maps virtual |
| * keys to SWT key codes and does not contain mappings for |
| * Windows virtual keys like VK_A. Virtual keys that are |
| * both virtual and ASCII are a special case. |
| */ |
| int mapKey = 0; |
| if (OS.IsWinCE) { |
| switch (wParam) { |
| case OS.VK_BACK: mapKey = SWT.BS; break; |
| case OS.VK_RETURN: mapKey = SWT.CR; break; |
| case OS.VK_DELETE: mapKey = SWT.DEL; break; |
| case OS.VK_ESCAPE: mapKey = SWT.ESC; break; |
| case OS.VK_TAB: mapKey = SWT.TAB; break; |
| } |
| } else { |
| mapKey = OS.MapVirtualKey (wParam, 2); |
| } |
| |
| /* |
| * Bug in Windows 95 and NT. When the user types an accent key such |
| * as ^ to get an accented character on a German keyboard, the accent |
| * key should be ignored and the next key that the user types is the |
| * accented key. The fix is to detect the accent key stroke (called |
| * a dead key) by testing the high bit of the value returned by |
| * MapVirtualKey(). A further problem is that the high bit on |
| * Windows NT is bit 32 while the high bit on Windows 95 is bit 16. |
| * They should both be bit 32. |
| * |
| * When the user types an accent key that does not correspond to a |
| * virtual key, MapVirtualKey() won't set the high bit to indicate |
| * a dead key. This happens when an accent key, such as '^' is the |
| * result of a modifier such as Shift key and MapVirtualKey() always |
| * returns the unshifted key. The fix is to peek for a WM_DEADCHAR |
| * and avoid issuing the event. |
| */ |
| if (OS.IsWinNT) { |
| if ((mapKey & 0x80000000) != 0) return null; |
| } else { |
| if ((mapKey & 0x8000) != 0) return null; |
| } |
| MSG msg = new MSG (); |
| int flags = OS.PM_NOREMOVE | OS.PM_NOYIELD | OS.PM_QS_INPUT | OS.PM_QS_POSTMESSAGE; |
| if (OS.PeekMessage (msg, hwnd, OS.WM_DEADCHAR, OS.WM_DEADCHAR, flags)) { |
| display.lastDead = true; |
| display.lastVirtual = mapKey == 0; |
| display.lastKey = display.lastVirtual ? wParam : mapKey; |
| return null; |
| } |
| |
| /* |
| * Bug in Windows. Somehow, the widget is becoming disposed after |
| * calling PeekMessage(). In rare cirucmstances, it seems that |
| * PeekMessage() can allow SWT listeners to run that might contain |
| * application code that disposes the widget. It is not exactly |
| * clear how this can happen. PeekMessage() is only looking for |
| * WM_DEADCHAR. It is not dispatching any message that it finds |
| * or removing any message from the queue. Cross-thread messages |
| * are disabled. The fix is to check for a disposed widget and |
| * return without calling the window proc. |
| */ |
| if (isDisposed ()) return LRESULT.ONE; |
| |
| /* |
| * If we are going to get a WM_CHAR, ensure that last key has |
| * the correct character value for the key down and key up |
| * events. It is not sufficient to ignore the WM_KEYDOWN |
| * (when we know we are going to get a WM_CHAR) and compute |
| * the key in WM_CHAR because there is not enough information |
| * by the time we get the WM_CHAR. For example, when the user |
| * types Ctrl+Shift+6 on a US keyboard, we get a WM_CHAR with |
| * wParam=30. When the user types Ctrl+Shift+6 on a German |
| * keyboard, we also get a WM_CHAR with wParam=30. On the US |
| * keyboard Shift+6 is ^, on the German keyboard Shift+6 is &. |
| * There is no way to map wParam=30 in WM_CHAR to the correct |
| * value. Also, on international keyboards, the control key |
| * may be down when the user has not entered a control character. |
| * |
| * NOTE: On Windows 98, keypad keys are virtual despite the |
| * fact that a WM_CHAR is issued. On Windows 2000 and XP, |
| * they are not virtual. Therefore it is necessary to force |
| * numeric keypad keys to be virtual. |
| */ |
| display.lastVirtual = mapKey == 0 || display.numpadKey (wParam) != 0; |
| if (display.lastVirtual) { |
| display.lastKey = wParam; |
| /* |
| * Feature in Windows. The virtual key VK_DELETE is not |
| * treated as both a virtual key and an ASCII key by Windows. |
| * Therefore, we will not receive a WM_CHAR for this key. |
| * The fix is to treat VK_DELETE as a special case and map |
| * the ASCII value explictly (Delete is 0x7F). |
| */ |
| if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F; |
| |
| /* |
| * It is possible to get a WM_CHAR for a virtual key when |
| * Num Lock is on. If the user types Home while Num Lock |
| * is down, a WM_CHAR is issued with WPARM=55 (for the |
| * character 7). If we are going to get a WM_CHAR we need |
| * to ensure that the last key has the correct value. Note |
| * that Ctrl+Home does not issue a WM_CHAR when Num Lock is |
| * down. |
| */ |
| if (OS.VK_NUMPAD0 <= display.lastKey && display.lastKey <= OS.VK_DIVIDE) { |
| /* |
| * Feature in Windows. Calling to ToAscii() or ToUnicode(), clears |
| * the accented state such that the next WM_CHAR loses the accent. |
| * This makes is critical that the accent key is detected. Also, |
| * these functions clear the character that is entered using the |
| * special Windows keypad sequence when NumLock is down (ie. typing |
| * ALT+0231 should gives 'c' with a cedilla when NumLock is down). |
| */ |
| if (display.asciiKey (display.lastKey) != 0) return null; |
| display.lastAscii = display.numpadKey (display.lastKey); |
| } |
| } else { |
| /* |
| * Convert LastKey to lower case because Windows non-virtual |
| * keys that are also ASCII keys, such as like VK_A, are have |
| * upper case values in WM_KEYDOWN despite the fact that the |
| * Shift was not pressed. |
| */ |
| display.lastKey = OS.CharLower ((short) mapKey); |
| |
| /* |
| * Feature in Windows. The virtual key VK_CANCEL is treated |
| * as both a virtual key and ASCII key by Windows. This |
| * means that a WM_CHAR with WPARAM=3 will be issued for |
| * this key. In order to distinguish between this key and |
| * Ctrl+C, mark the key as virtual. |
| */ |
| if (wParam == OS.VK_CANCEL) display.lastVirtual = true; |
| |
| /* |
| * Some key combinations map to Windows ASCII keys depending |
| * on the keyboard. For example, Ctrl+Alt+Q maps to @ on a |
| * German keyboard. If the current key combination is special, |
| * the correct character is placed in wParam for processing in |
| * WM_CHAR. If this is the case, issue the key down event from |
| * inside WM_CHAR. |
| */ |
| int asciiKey = display.asciiKey (wParam); |
| if (asciiKey != 0) { |
| /* |
| * When the user types Ctrl+Space, ToAscii () maps this to |
| * Space. Normally, ToAscii () maps a key to a different |
| * key if both a WM_KEYDOWN and a WM_CHAR will be issued. |
| * To avoid the extra SWT.KeyDown, look for a space and |
| * issue the event from WM_CHAR. |
| */ |
| if (asciiKey == ' ') return null; |
| if (asciiKey != wParam) return null; |
| /* |
| * Feature in Windows. The virtual key VK_CANCEL is treated |
| * as both a virtual key and ASCII key by Windows. This |
| * means that a WM_CHAR with WPARAM=3 will be issued for |
| * this key. To avoid the extra SWT.KeyDown, look for |
| * VK_CANCEL and issue the event from WM_CHAR. |
| */ |
| if (wParam == OS.VK_CANCEL) return null; |
| } |
| |
| /* |
| * If the control key is not down at this point, then |
| * the key that was pressed was an accent key or a regular |
| * key such as 'A' or Shift+A. In that case, issue the |
| * key event from WM_CHAR. |
| */ |
| if (OS.GetKeyState (OS.VK_CONTROL) >= 0) return null; |
| |
| /* |
| * Get the shifted state or convert to lower case if necessary. |
| * If the user types Ctrl+A, LastAscii should be 'a', not 'A'. |
| * If the user types Ctrl+Shift+A, LastAscii should be 'A'. |
| * If the user types Ctrl+Shift+6, the value of LastAscii will |
| * depend on the international keyboard. |
| */ |
| if (OS.GetKeyState (OS.VK_SHIFT) < 0) { |
| display.lastAscii = display.shiftedKey (wParam); |
| if (display.lastAscii == 0) display.lastAscii = mapKey; |
| } else { |
| display.lastAscii = OS.CharLower ((short) mapKey); |
| } |
| |
| /* Note that Ctrl+'@' is ASCII NUL and is delivered in WM_CHAR */ |
| if (display.lastAscii == '@') return null; |
| display.lastAscii = display.controlKey (display.lastAscii); |
| } |
| if (!sendKeyEvent (SWT.KeyDown, OS.WM_KEYDOWN, wParam, lParam)) { |
| return LRESULT.ONE; |
| } |
| // widget could be disposed at this point |
| return null; |
| } |
| |
| LRESULT wmKeyUp (int hwnd, int wParam, int lParam) { |
| Display display = this.display; |
| |
| /* Check for hardware keys */ |
| if (OS.IsWinCE) { |
| if (OS.VK_APP1 <= wParam && wParam <= OS.VK_APP6) { |
| display.lastKey = display.lastAscii = 0; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| Event event = new Event (); |
| event.detail = wParam - OS.VK_APP1 + 1; |
| /* Check the bit 30 to get the key state */ |
| int type = (lParam & 0x40000000) != 0 ? SWT.HardKeyUp : SWT.HardKeyDown; |
| if (setInputState (event, type)) sendEvent (type, event); |
| // widget could be disposed at this point |
| return null; |
| } |
| } |
| |
| /* |
| * If the key up is not hooked, reset last key |
| * and last ascii in case the key down is hooked. |
| */ |
| if (!hooks (SWT.KeyUp) && !display.filters (SWT.KeyUp)) { |
| display.lastKey = display.lastAscii = 0; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| return null; |
| } |
| |
| /* Map the virtual key. */ |
| /* |
| * Bug in WinCE. MapVirtualKey() returns incorrect values. |
| * The fix is to rely on a key mappings table to determine |
| * whether the key event must be sent now or if a WM_CHAR |
| * event will follow. The key mappings table maps virtual |
| * keys to SWT key codes and does not contain mappings for |
| * Windows virtual keys like VK_A. Virtual keys that are |
| * both virtual and ASCII are a special case. |
| */ |
| int mapKey = 0; |
| if (OS.IsWinCE) { |
| switch (wParam) { |
| case OS.VK_BACK: mapKey = SWT.BS; break; |
| case OS.VK_RETURN: mapKey = SWT.CR; break; |
| case OS.VK_DELETE: mapKey = SWT.DEL; break; |
| case OS.VK_ESCAPE: mapKey = SWT.ESC; break; |
| case OS.VK_TAB: mapKey = SWT.TAB; break; |
| } |
| } else { |
| mapKey = OS.MapVirtualKey (wParam, 2); |
| } |
| |
| /* |
| * Bug in Windows 95 and NT. When the user types an accent key such |
| * as ^ to get an accented character on a German keyboard, the accent |
| * key should be ignored and the next key that the user types is the |
| * accented key. The fix is to detect the accent key stroke (called |
| * a dead key) by testing the high bit of the value returned by |
| * MapVirtualKey (). A further problem is that the high bit on |
| * Windows NT is bit 32 while the high bit on Windows 95 is bit 16. |
| * They should both be bit 32. |
| */ |
| if (OS.IsWinNT) { |
| if ((mapKey & 0x80000000) != 0) return null; |
| } else { |
| if ((mapKey & 0x8000) != 0) return null; |
| } |
| if (display.lastDead) return null; |
| |
| /* |
| * NOTE: On Windows 98, keypad keys are virtual despite the |
| * fact that a WM_CHAR is issued. On Windows 2000 and XP, |
| * they are not virtual. Therefore it is necessary to force |
| * numeric keypad keys to be virtual. |
| */ |
| display.lastVirtual = mapKey == 0 || display.numpadKey (wParam) != 0; |
| if (display.lastVirtual) { |
| display.lastKey = wParam; |
| } else { |
| /* |
| * Feature in Windows. The virtual key VK_CANCEL is treated |
| * as both a virtual key and ASCII key by Windows. This |
| * means that a WM_CHAR with WPARAM=3 will be issued for |
| * this key. In order to distingush between this key and |
| * Ctrl+C, mark the key as virtual. |
| */ |
| if (wParam == OS.VK_CANCEL) display.lastVirtual = true; |
| if (display.lastKey == 0) { |
| display.lastAscii = 0; |
| display.lastNull = display.lastDead = false; |
| return null; |
| } |
| } |
| LRESULT result = null; |
| if (!sendKeyEvent (SWT.KeyUp, OS.WM_KEYUP, wParam, lParam)) { |
| result = LRESULT.ONE; |
| } |
| // widget could be disposed at this point |
| display.lastKey = display.lastAscii = 0; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| return result; |
| } |
| |
| LRESULT wmKillFocus (int hwnd, int wParam, int lParam) { |
| int code = callWindowProc (hwnd, OS.WM_KILLFOCUS, wParam, lParam); |
| sendFocusEvent (SWT.FocusOut); |
| // widget could be disposed at this point |
| |
| /* |
| * It is possible (but unlikely), that application |
| * code could have disposed the widget in the focus |
| * or deactivate events. If this happens, end the |
| * processing of the Windows message by returning |
| * zero as the result of the window proc. |
| */ |
| if (isDisposed ()) return LRESULT.ZERO; |
| if (code == 0) return LRESULT.ZERO; |
| return new LRESULT (code); |
| } |
| |
| LRESULT wmLButtonDblClk (int hwnd, int wParam, int lParam) { |
| /* |
| * Feature in Windows. Windows sends the following |
| * messages when the user double clicks the mouse: |
| * |
| * WM_LBUTTONDOWN - mouse down |
| * WM_LBUTTONUP - mouse up |
| * WM_LBUTTONDBLCLK - double click |
| * WM_LBUTTONUP - mouse up |
| * |
| * Applications that expect matching mouse down/up |
| * pairs will not see the second mouse down. The |
| * fix is to send a mouse down event. |
| */ |
| sendMouseEvent (SWT.MouseDown, 1, hwnd, OS.WM_LBUTTONDOWN, wParam, lParam); |
| sendMouseEvent (SWT.MouseDoubleClick, 1, hwnd, OS.WM_LBUTTONDBLCLK, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_LBUTTONDBLCLK, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmLButtonDown (int hwnd, int wParam, int lParam) { |
| boolean dragging = false, mouseDown = true; |
| boolean dragDetect = hooks (SWT.DragDetect); |
| if (dragDetect) { |
| if (!OS.IsWinCE) { |
| /* |
| * Feature in Windows. It's possible that the drag |
| * operation will not be started while the mouse is |
| * down, meaning that the mouse should be captured. |
| * This can happen when the user types the ESC key |
| * to cancel the drag. The fix is to query the state |
| * of the mouse and capture the mouse accordingly. |
| */ |
| POINT pt = new POINT (); |
| pt.x = (short) (lParam & 0xFFFF); |
| pt.y = (short) (lParam >> 16); |
| OS.ClientToScreen (hwnd, pt); |
| dragging = OS.DragDetect (hwnd, pt); |
| mouseDown = OS.GetKeyState (OS.VK_LBUTTON) < 0; |
| } |
| } |
| sendMouseEvent (SWT.MouseDown, 1, hwnd, OS.WM_LBUTTONDOWN, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_LBUTTONDOWN, wParam, lParam); |
| if (OS.IsPPC) { |
| /* |
| * Note: On WinCE PPC, only attempt to recognize the gesture for |
| * a context menu when the control contains a valid menu or there |
| * are listeners for the MenuDetect event. |
| */ |
| Menu menu = getMenu (); |
| boolean hasMenu = menu != null && !menu.isDisposed (); |
| if (hasMenu || hooks (SWT.MenuDetect)) { |
| int x = (short) (lParam & 0xFFFF); |
| int y = (short) (lParam >> 16); |
| SHRGINFO shrg = new SHRGINFO (); |
| shrg.cbSize = SHRGINFO.sizeof; |
| shrg.hwndClient = hwnd; |
| shrg.ptDown_x = x; |
| shrg.ptDown_y = y; |
| shrg.dwFlags = OS.SHRG_RETURNCMD; |
| int type = OS.SHRecognizeGesture (shrg); |
| if (type == OS.GN_CONTEXTMENU) showMenu (x, y); |
| } |
| } |
| if (mouseDown) { |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| } |
| if (dragging) { |
| Event event = new Event (); |
| event.x = (short) (lParam & 0xFFFF); |
| event.y = (short) (lParam >> 16); |
| postEvent (SWT.DragDetect, event); |
| } else { |
| if (dragDetect) { |
| /* |
| * Feature in Windows. DragDetect() captures the mouse |
| * and tracks its movement until the user releases the |
| * left mouse button, presses the ESC key, or moves the |
| * mouse outside the drag rectangle. If the user moves |
| * the mouse outside of the drag rectangle, DragDetect() |
| * returns true and a drag and drop operation can be |
| * started. When the left mouse button is released or |
| * the ESC key is pressed, these events are consumed by |
| * DragDetect() so that application code that matches |
| * mouse down/up pairs or looks for the ESC key will not |
| * function properly. The fix is to send the missing |
| * events when the drag has not started. |
| * |
| * NOTE: For now, don't send a fake WM_KEYDOWN/WM_KEYUP |
| * events for the ESC key. This would require computing |
| * wParam (the key) and lParam (the repeat count, scan code, |
| * extended-key flag, context code, previous key-state flag, |
| * and transition-state flag) which is non-trivial. |
| */ |
| if (OS.GetKeyState (OS.VK_ESCAPE) >= 0) { |
| OS.SendMessage (hwnd, OS.WM_LBUTTONUP, wParam, lParam); |
| } |
| } |
| } |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmLButtonUp (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseUp, 1, hwnd, OS.WM_LBUTTONUP, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_LBUTTONUP, wParam, lParam); |
| int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON | OS.MK_XBUTTON1 | OS.MK_XBUTTON2; |
| if (((wParam & 0xFFFF) & mask) == 0) { |
| if (OS.GetCapture () == hwnd) OS.ReleaseCapture (); |
| } |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmMButtonDblClk (int hwnd, int wParam, int lParam) { |
| /* |
| * Feature in Windows. Windows sends the following |
| * messages when the user double clicks the mouse: |
| * |
| * WM_MBUTTONDOWN - mouse down |
| * WM_MBUTTONUP - mouse up |
| * WM_MLBUTTONDBLCLK - double click |
| * WM_MBUTTONUP - mouse up |
| * |
| * Applications that expect matching mouse down/up |
| * pairs will not see the second mouse down. The |
| * fix is to send a mouse down event. |
| */ |
| sendMouseEvent (SWT.MouseDown, 2, hwnd, OS.WM_MBUTTONDOWN, wParam, lParam); |
| sendMouseEvent (SWT.MouseDoubleClick, 2, hwnd, OS.WM_MBUTTONDBLCLK, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_MBUTTONDBLCLK, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmMButtonDown (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseDown, 2, hwnd, OS.WM_MBUTTONDOWN, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_MBUTTONDOWN, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmMButtonUp (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseUp, 2, hwnd, OS.WM_MBUTTONUP, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_MBUTTONUP, wParam, lParam); |
| int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON | OS.MK_XBUTTON1 | OS.MK_XBUTTON2; |
| if (((wParam & 0xFFFF) & mask) == 0) { |
| if (OS.GetCapture () == hwnd) OS.ReleaseCapture (); |
| } |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmMouseHover (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseHover, 0, hwnd, OS.WM_MOUSEHOVER, wParam, lParam); |
| return null; |
| } |
| |
| LRESULT wmMouseLeave (int hwnd, int wParam, int lParam) { |
| if (!hooks (SWT.MouseExit) && !filters (SWT.MouseExit)) return null; |
| int pos = OS.GetMessagePos (); |
| POINT pt = new POINT (); |
| pt.x = (short) (pos & 0xFFFF); |
| pt.y = (short) (pos >> 16); |
| OS.ScreenToClient (hwnd, pt); |
| lParam = pt.x | (pt.y << 16); |
| sendMouseEvent (SWT.MouseExit, 0, hwnd, OS.WM_MOUSELEAVE, wParam, lParam); |
| return null; |
| } |
| |
| LRESULT wmMouseMove (int hwnd, int wParam, int lParam) { |
| int pos = OS.GetMessagePos (); |
| if (pos != display.lastMouse || display.captureChanged) { |
| if (!OS.IsWinCE) { |
| boolean mouseEnter = hooks (SWT.MouseEnter) || display.filters (SWT.MouseEnter); |
| boolean mouseExit = hooks (SWT.MouseExit) || display.filters (SWT.MouseExit); |
| boolean mouseHover = hooks (SWT.MouseHover) || display.filters (SWT.MouseHover); |
| if (mouseEnter || mouseExit || mouseHover) { |
| TRACKMOUSEEVENT lpEventTrack = new TRACKMOUSEEVENT (); |
| lpEventTrack.cbSize = TRACKMOUSEEVENT.sizeof; |
| lpEventTrack.dwFlags = OS.TME_QUERY; |
| lpEventTrack.hwndTrack = hwnd; |
| OS.TrackMouseEvent (lpEventTrack); |
| if (lpEventTrack.dwFlags == 0) { |
| lpEventTrack.dwFlags = OS.TME_LEAVE | OS.TME_HOVER; |
| lpEventTrack.hwndTrack = hwnd; |
| OS.TrackMouseEvent (lpEventTrack); |
| if (mouseEnter) { |
| /* |
| * Force all outstanding WM_MOUSELEAVE messages to be dispatched before |
| * issuing a mouse enter. This causes mouse exit events to be processed |
| * before mouse enter events. Note that WM_MOUSELEAVE is posted to the |
| * event queue by TrackMouseEvent(). |
| */ |
| MSG msg = new MSG (); |
| int flags = OS.PM_REMOVE | OS.PM_NOYIELD | OS.PM_QS_INPUT | OS.PM_QS_POSTMESSAGE; |
| while (OS.PeekMessage (msg, 0, OS.WM_MOUSELEAVE, OS.WM_MOUSELEAVE, flags)) { |
| OS.TranslateMessage (msg); |
| OS.DispatchMessage (msg); |
| } |
| sendMouseEvent (SWT.MouseEnter, 0, hwnd, OS.WM_MOUSEMOVE, wParam, lParam); |
| } |
| } else { |
| lpEventTrack.dwFlags = OS.TME_HOVER; |
| OS.TrackMouseEvent (lpEventTrack); |
| } |
| } |
| } |
| if (pos != display.lastMouse) { |
| display.lastMouse = pos; |
| sendMouseEvent (SWT.MouseMove, 0, hwnd, OS.WM_MOUSEMOVE, wParam, lParam); |
| } |
| } |
| display.captureChanged = false; |
| return null; |
| } |
| |
| LRESULT wmMouseWheel (int hwnd, int wParam, int lParam) { |
| if (!hooks (SWT.MouseWheel) && !filters (SWT.MouseWheel)) return null; |
| int delta = wParam >> 16; |
| int [] value = new int [1]; |
| int count, detail; |
| OS.SystemParametersInfo (OS.SPI_GETWHEELSCROLLLINES, 0, value, 0); |
| if (value [0] == OS.WHEEL_PAGESCROLL) { |
| detail = SWT.SCROLL_PAGE; |
| count = delta / OS.WHEEL_DELTA; |
| } else { |
| detail = SWT.SCROLL_LINE; |
| count = value [0] * delta / OS.WHEEL_DELTA; |
| } |
| POINT pt = new POINT (); |
| pt.x = (short) (lParam & 0xFFFF); |
| pt.y = (short) (lParam >> 16); |
| OS.ScreenToClient (hwnd, pt); |
| lParam = pt.x | (pt.y << 16); |
| if (!sendMouseEvent (SWT.MouseWheel, 0, count, detail, true, hwnd, OS.WM_MOUSEWHEEL, wParam, lParam)) { |
| return LRESULT.ZERO; |
| } |
| return null; |
| } |
| |
| LRESULT wmPaint (int hwnd, int wParam, int lParam) { |
| |
| /* Exit early - don't draw the background */ |
| if (!hooks (SWT.Paint) && !filters (SWT.Paint)) { |
| return null; |
| } |
| |
| /* Issue a paint event */ |
| int result = 0; |
| if (OS.IsWinCE) { |
| RECT rect = new RECT (); |
| OS.GetUpdateRect (hwnd, rect, false); |
| result = callWindowProc (hwnd, OS.WM_PAINT, wParam, lParam); |
| /* |
| * Bug in Windows. When InvalidateRgn(), InvalidateRect() |
| * or RedrawWindow() with RDW_INVALIDATE is called from |
| * within WM_PAINT to invalidate a region for a further |
| * BeginPaint(), the caret is not properly erased causing |
| * pixel corruption. The fix is to hide and show the |
| * caret. |
| */ |
| OS.HideCaret (hwnd); |
| OS.InvalidateRect (hwnd, rect, false); |
| OS.ShowCaret (hwnd); |
| PAINTSTRUCT ps = new PAINTSTRUCT (); |
| GCData data = new GCData (); |
| data.ps = ps; |
| data.hwnd = hwnd; |
| GC gc = new_GC (data); |
| if (gc != null) { |
| int width = ps.right - ps.left; |
| int height = ps.bottom - ps.top; |
| if (width != 0 && height != 0) { |
| Event event = new Event (); |
| event.gc = gc; |
| event.x = ps.left; |
| event.y = ps.top; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Paint, event); |
| // widget could be disposed at this point |
| event.gc = null; |
| } |
| gc.dispose (); |
| } |
| } else { |
| int rgn = OS.CreateRectRgn (0, 0, 0, 0); |
| OS.GetUpdateRgn (hwnd, rgn, false); |
| result = callWindowProc (hwnd, OS.WM_PAINT, wParam, lParam); |
| GCData data = new GCData (); |
| data.hwnd = hwnd; |
| GC gc = new_GC (data); |
| if (gc != null) { |
| OS.HideCaret (hwnd); |
| RECT rect = new RECT(); |
| OS.GetRgnBox (rgn, rect); |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| if (width != 0 && height != 0) { |
| int hDC = gc.handle; |
| OS.SelectClipRgn (hDC, rgn); |
| OS.SetMetaRgn (hDC); |
| Event event = new Event (); |
| event.gc = gc; |
| event.x = rect.left; |
| event.y = rect.top; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Paint, event); |
| // widget could be disposed at this point |
| event.gc = null; |
| } |
| gc.dispose (); |
| OS.ShowCaret (hwnd); |
| } |
| OS.DeleteObject (rgn); |
| } |
| if (result == 0) return LRESULT.ZERO; |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmRButtonDblClk (int hwnd, int wParam, int lParam) { |
| /* |
| * Feature in Windows. Windows sends the following |
| * messages when the user double clicks the mouse: |
| * |
| * WM_RBUTTONDOWN - mouse down |
| * WM_RBUTTONUP - mouse up |
| * WM_RBUTTONDBLCLK - double click |
| * WM_LBUTTONUP - mouse up |
| * |
| * Applications that expect matching mouse down/up |
| * pairs will not see the second mouse down. The |
| * fix is to send a mouse down event. |
| */ |
| sendMouseEvent (SWT.MouseDown, 3, hwnd, OS.WM_RBUTTONDOWN, wParam, lParam); |
| sendMouseEvent (SWT.MouseDoubleClick, 3, hwnd, OS.WM_RBUTTONDBLCLK, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_RBUTTONDBLCLK, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmRButtonDown (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseDown, 3, hwnd, OS.WM_RBUTTONDOWN, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_RBUTTONDOWN, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmRButtonUp (int hwnd, int wParam, int lParam) { |
| sendMouseEvent (SWT.MouseUp, 3, hwnd, OS.WM_RBUTTONUP, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_RBUTTONUP, wParam, lParam); |
| int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON | OS.MK_XBUTTON1 | OS.MK_XBUTTON2; |
| if (((wParam & 0xFFFF) & mask) == 0) { |
| if (OS.GetCapture () == hwnd) OS.ReleaseCapture (); |
| } |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmSetFocus (int hwnd, int wParam, int lParam) { |
| int code = callWindowProc (hwnd, OS.WM_SETFOCUS, wParam, lParam); |
| sendFocusEvent (SWT.FocusIn); |
| // widget could be disposed at this point |
| |
| /* |
| * It is possible (but unlikely), that application |
| * code could have disposed the widget in the focus |
| * or activate events. If this happens, end the |
| * processing of the Windows message by returning |
| * zero as the result of the window proc. |
| */ |
| if (isDisposed ()) return LRESULT.ZERO; |
| if (code == 0) return LRESULT.ZERO; |
| return new LRESULT (code); |
| } |
| |
| LRESULT wmSysChar (int hwnd, int wParam, int lParam) { |
| Display display = this.display; |
| display.lastAscii = wParam; |
| display.lastNull = wParam == 0; |
| |
| /* Do not issue a key down if a menu bar mnemonic was invoked */ |
| if (!hooks (SWT.KeyDown) && !display.filters (SWT.KeyDown)) { |
| return null; |
| } |
| |
| /* Call the window proc to determine whether it is a system key or mnemonic */ |
| boolean oldKeyHit = display.mnemonicKeyHit; |
| display.mnemonicKeyHit = true; |
| int result = callWindowProc (hwnd, OS.WM_SYSCHAR, wParam, lParam); |
| boolean consumed = false; |
| if (!display.mnemonicKeyHit) { |
| consumed = !sendKeyEvent (SWT.KeyDown, OS.WM_SYSCHAR, wParam, lParam); |
| // widget could be disposed at this point |
| } |
| consumed |= display.mnemonicKeyHit; |
| display.mnemonicKeyHit = oldKeyHit; |
| return consumed ? LRESULT.ONE : new LRESULT (result); |
| } |
| |
| LRESULT wmSysKeyDown (int hwnd, int wParam, int lParam) { |
| /* |
| * Feature in Windows. When WM_SYSKEYDOWN is sent, |
| * the user pressed ALT+<key> or F10 to get to the |
| * menu bar. In order to issue events for F10 but |
| * ignore other key presses when the ALT is not down, |
| * make sure that either F10 was pressed or that ALT |
| * is pressed. |
| */ |
| if (wParam != OS.VK_F10) { |
| /* Make sure WM_SYSKEYDOWN was sent by ALT-<aKey>. */ |
| if ((lParam & 0x20000000) == 0) return null; |
| } |
| |
| /* Ignore well known system keys */ |
| switch (wParam) { |
| case OS.VK_F4: return null; |
| } |
| |
| /* Ignore repeating modifier keys by testing key down state */ |
| switch (wParam) { |
| case OS.VK_SHIFT: |
| case OS.VK_MENU: |
| case OS.VK_CONTROL: |
| case OS.VK_CAPITAL: |
| case OS.VK_NUMLOCK: |
| case OS.VK_SCROLL: |
| if ((lParam & 0x40000000) != 0) return null; |
| } |
| |
| /* Clear last key and last ascii because a new key has been typed */ |
| display.lastAscii = display.lastKey = 0; |
| display.lastVirtual = display.lastNull = display.lastDead = false; |
| |
| /* If are going to get a WM_SYSCHAR, ignore this message. */ |
| /* |
| * Bug in WinCE. MapVirtualKey() returns incorrect values. |
| * The fix is to rely on a key mappings table to determine |
| * whether the key event must be sent now or if a WM_CHAR |
| * event will follow. The key mappings table maps virtual |
| * keys to SWT key codes and does not contain mappings for |
| * Windows virtual keys like VK_A. Virtual keys that are |
| * both virtual and ASCII are a special case. |
| */ |
| int mapKey = 0; |
| if (OS.IsWinCE) { |
| switch (wParam) { |
| case OS.VK_BACK: mapKey = SWT.BS; break; |
| case OS.VK_RETURN: mapKey = SWT.CR; break; |
| case OS.VK_DELETE: mapKey = SWT.DEL; break; |
| case OS.VK_ESCAPE: mapKey = SWT.ESC; break; |
| case OS.VK_TAB: mapKey = SWT.TAB; break; |
| } |
| } else { |
| mapKey = OS.MapVirtualKey (wParam, 2); |
| } |
| display.lastVirtual = mapKey == 0 || display.numpadKey (wParam) != 0; |
| if (display.lastVirtual) { |
| display.lastKey = wParam; |
| /* |
| * Feature in Windows. The virtual key VK_DELETE is not |
| * treated as both a virtual key and an ASCII key by Windows. |
| * Therefore, we will not receive a WM_SYSCHAR for this key. |
| * The fix is to treat VK_DELETE as a special case and map |
| * the ASCII value explictly (Delete is 0x7F). |
| */ |
| if (display.lastKey == OS.VK_DELETE) display.lastAscii = 0x7F; |
| |
| /* When a keypad key is typed, a WM_SYSCHAR is not issued */ |
| if (OS.VK_NUMPAD0 <= display.lastKey && display.lastKey <= OS.VK_DIVIDE) { |
| display.lastAscii = display.numpadKey (display.lastKey); |
| } |
| } else { |
| /* |
| * Convert LastKey to lower case because Windows non-virtual |
| * keys that are also ASCII keys, such as like VK_A, are have |
| * upper case values in WM_SYSKEYDOWN despite the fact that the |
| * Shift was not pressed. |
| */ |
| display.lastKey = OS.CharLower ((short) mapKey); |
| |
| /* |
| * Feature in Windows 98. MapVirtualKey() indicates that |
| * a WM_SYSCHAR message will occur for Alt+Enter but |
| * this message never happens. The fix is to issue the |
| * event from WM_SYSKEYDOWN and map VK_RETURN to '\r'. |
| */ |
| if (OS.IsWinNT) return null; |
| if (wParam != OS.VK_RETURN) return null; |
| display.lastAscii = '\r'; |
| } |
| |
| if (!sendKeyEvent (SWT.KeyDown, OS.WM_SYSKEYDOWN, wParam, lParam)) { |
| return LRESULT.ONE; |
| } |
| // widget could be disposed at this point |
| return null; |
| } |
| |
| LRESULT wmSysKeyUp (int hwnd, int wParam, int lParam) { |
| return wmKeyUp (hwnd, wParam, lParam); |
| } |
| |
| LRESULT wmXButtonDblClk (int hwnd, int wParam, int lParam) { |
| /* |
| * Feature in Windows. Windows sends the following |
| * messages when the user double clicks the mouse: |
| * |
| * WM_XBUTTONDOWN - mouse down |
| * WM_XBUTTONUP - mouse up |
| * WM_XLBUTTONDBLCLK - double click |
| * WM_XBUTTONUP - mouse up |
| * |
| * Applications that expect matching mouse down/up |
| * pairs will not see the second mouse down. The |
| * fix is to send a mouse down event. |
| */ |
| int button = (wParam >> 16 == OS.XBUTTON1) ? 4 : 5; |
| sendMouseEvent (SWT.MouseDown, button, hwnd, OS.WM_XBUTTONDOWN, wParam, lParam); |
| sendMouseEvent (SWT.MouseDoubleClick, button, hwnd, OS.WM_XBUTTONDBLCLK, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_XBUTTONDBLCLK, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmXButtonDown (int hwnd, int wParam, int lParam) { |
| int button = (wParam >> 16 == OS.XBUTTON1) ? 4 : 5; |
| sendMouseEvent (SWT.MouseDown, button, hwnd, OS.WM_XBUTTONDOWN, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_XBUTTONDOWN, wParam, lParam); |
| if (OS.GetCapture () != hwnd) OS.SetCapture (hwnd); |
| return new LRESULT (result); |
| } |
| |
| LRESULT wmXButtonUp (int hwnd, int wParam, int lParam) { |
| int button = (wParam >> 16 == OS.XBUTTON1) ? 4 : 5; |
| sendMouseEvent (SWT.MouseUp, button, hwnd, OS.WM_XBUTTONUP, wParam, lParam); |
| int result = callWindowProc (hwnd, OS.WM_XBUTTONUP, wParam, lParam); |
| int mask = OS.MK_LBUTTON | OS.MK_MBUTTON | OS.MK_RBUTTON | OS.MK_XBUTTON1 | OS.MK_XBUTTON2; |
| if (((wParam & 0xFFFF) & mask) == 0) { |
| if (OS.GetCapture () == hwnd) OS.ReleaseCapture (); |
| } |
| return new LRESULT (result); |
| } |
| } |