shell.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

 */
public void close () {
	checkWidget ();
	OS.PostMessage (handle, OS.WM_CLOSE, 0, 0);
}

void createHandle () {
	boolean embedded = handle != 0;
	
	/*
	* On Windows 98 and NT, setting a window to be the
	* top most window using HWND_TOPMOST can result in a
	* parent dialog shell being moved behind its parent
	* if the dialog has a sibling that is currently on top
	* This only occurs using SetWindowPos (), not when the
	* handle is created.
	*/
	/*
	* The following code is intentionally commented.
	*/
//	if ((style & SWT.ON_TOP) != 0) display.lockActiveWindow = true;
	super.createHandle ();
	
	/*
	* The following code is intentionally commented.
	*/
//	if ((style & SWT.ON_TOP) != 0)  display.lockActiveWindow = false;
	
	if (!embedded) {
		int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);	
		bits &= ~(OS.WS_OVERLAPPED | OS.WS_CAPTION);
		if (!OS.IsWinCE) bits |= OS.WS_POPUP;
		if ((style & SWT.TITLE) != 0) bits |= OS.WS_CAPTION;
		if ((style & SWT.NO_TRIM) == 0) {
			if ((style & (SWT.BORDER | SWT.RESIZE)) == 0) bits |= OS.WS_BORDER;
		}
		/*
		* Bug in Windows.  When the WS_CAPTION bits are cleared using
		* SetWindowLong(), Windows does not resize the client area of
		* the window to get rid of the caption until the first resize.
		* The fix is to use SetWindowPos() with SWP_DRAWFRAME to force
		* the frame to be redrawn and resized.
		*/
		OS.SetWindowLong (handle, OS.GWL_STYLE, bits);
		int flags = OS.SWP_DRAWFRAME | OS.SWP_NOMOVE | OS.SWP_NOSIZE | OS.SWP_NOZORDER | OS.SWP_NOACTIVATE;
		SetWindowPos (handle, 0, 0, 0, 0, 0, flags);
		if (OS.IsWinCE) setMaximized (true);
		if (OS.IsPPC) {
			psai = new SHACTIVATEINFO ();
			psai.cbSize = SHACTIVATEINFO.sizeof;
		}
	}
	if (OS.IsDBLocale) {
		hIMC = OS.ImmCreateContext ();
		if (hIMC != 0) OS.ImmAssociateContext (handle, hIMC);
	}
}

public void dispose () {
	/*
	* This code is intentionally commented.  On some
	* platforms, the owner window is repainted right
	* away when a dialog window exits.  This behavior
	* is currently unspecified.
	*/
//	/*
//	* Note:  It is valid to attempt to dispose a widget
//	* more than once.  If this happens, fail silently.
//	*/
//	if (!isValidWidget ()) return;
//	if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
//	Display oldDisplay = display;
	super.dispose ();
	// widget is disposed at this point
//	if (oldDisplay != null) oldDisplay.update ();
}

void enableWidget (boolean enabled) {
	if (enabled) {
		state &= ~DISABLED;
	} else {
		state |= DISABLED;
	}
	if (Display.TrimEnabled) {
		if (isActive ()) setItemEnabled (OS.SC_CLOSE, enabled);
	} else {
		OS.EnableWindow (handle, enabled);
	}
}

int findBrush (int pixel) {
	if (pixel == OS.GetSysColor (OS.COLOR_BTNFACE)) {
		return OS.GetSysColorBrush (OS.COLOR_BTNFACE);
	}
	if (pixel == OS.GetSysColor (OS.COLOR_WINDOW)) {
		return OS.GetSysColorBrush (OS.COLOR_WINDOW);
	}
	if (brushes == null) brushes = new int [4];
	LOGBRUSH logBrush = new LOGBRUSH ();
	for (int i=0; i<brushes.length; i++) {
		int hBrush = brushes [i];
		if (hBrush == 0) break;
		OS.GetObject (hBrush, LOGBRUSH.sizeof, logBrush);
		if (logBrush.lbColor == pixel) return hBrush;
	}
	int length = brushes.length;
	int hBrush = brushes [--length];
	if (hBrush != 0) OS.DeleteObject (hBrush);
	System.arraycopy (brushes, 0, brushes, 1, length);
	brushes [0] = hBrush = OS.CreateSolidBrush (pixel);
	return hBrush;
}

Cursor findCursor () {
	return cursor;
}

void fixShell (Shell newShell, Control control) {
	if (this == newShell) return;
	if (control == lastActive) setActiveControl (null);
	if (toolTipHandle != 0) {
		setToolTipText (control.handle, null);
	}
	newShell.setToolTipText (control.handle, control.toolTipText);
}

/**
 * Moves the receiver to the top of the drawing order for
 * the display on which it was created (so that all other
 * shells on that display, which are not the receiver's
 * children will be drawn behind it) and forces the window
 * manager to make the shell active.
 *
 * @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>
 *
 * @since 2.0
 * @see Control#moveAbove
 * @see Control#setFocus
 * @see Control#setVisible
 * @see Display#getActiveShell
 * @see Decorations#setDefaultButton
 * @see Shell#open
 * @see Shell#setActive
 */
public void forceActive () {
	checkWidget ();
	OS.SetForegroundWindow (handle);
}

void forceResize () {
	/* Do nothing */
}

public Rectangle getBounds () {
	checkWidget ();
	if (!OS.IsWinCE) {
		if (OS.IsIconic (handle)) return super.getBounds ();
	}
	RECT rect = new RECT ();
	OS.GetWindowRect (handle, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	return new Rectangle (rect.left, rect.top, width, height);
}

public boolean getEnabled () {
	checkWidget ();
	return (state & DISABLED) == 0;
}

/**
 * Returns the receiver's input method editor mode. This
 * will be the result of bitwise OR'ing together one or
 * more of the following constants defined in class
 * <code>SWT</code>:
 * <code>NONE</code>, <code>ROMAN</code>, <code>DBCS</code>, 
 * <code>PHONETIC</code>, <code>NATIVE</code>, <code>ALPHA</code>.
 *
 * @return the IME mode
 *
 * @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 SWT
 */
public int getImeInputMode () {
	checkWidget ();
	if (!OS.IsDBLocale) return 0;
	int hIMC = OS.ImmGetContext (handle);
	int [] lpfdwConversion = new int [1], lpfdwSentence = new int [1];
	boolean open = OS.ImmGetOpenStatus (hIMC);
	if (open) open = OS.ImmGetConversionStatus (hIMC, lpfdwConversion, lpfdwSentence);
	OS.ImmReleaseContext (handle, hIMC);
	if (!open) return SWT.NONE;
	int result = 0;
	if ((lpfdwConversion [0] & OS.IME_CMODE_ROMAN) != 0) result |= SWT.ROMAN;
	if ((lpfdwConversion [0] & OS.IME_CMODE_FULLSHAPE) != 0) result |= SWT.DBCS;
	if ((lpfdwConversion [0] & OS.IME_CMODE_KATAKANA) != 0) return result | SWT.PHONETIC;
	if ((lpfdwConversion [0] & OS.IME_CMODE_NATIVE) != 0) return result | SWT.NATIVE;
	return result | SWT.ALPHA;
}

public Point getLocation () {
	checkWidget ();
	if (!OS.IsWinCE) {
		if (OS.IsIconic (handle)) {
			return super.getLocation ();
		}
	}
	RECT rect = new RECT ();
	OS.GetWindowRect (handle, rect);
	return new Point (rect.left, rect.top);
}

/** 
 * Returns the region that defines the shape of the shell,
 * or null if the shell has the default shape.
 *
 * @return the region that defines the shape of the shell (or null)
 *	
 * @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>
 *
 * @since 3.0
 *
 */
public Region getRegion () {
	checkWidget ();
	return region;
}

public Shell getShell () {
	checkWidget ();
	return this;
}

public Point getSize () {
	checkWidget ();
	if (!OS.IsWinCE) {
		if (OS.IsIconic (handle)) return super.getSize ();
	}
	RECT rect = new RECT ();
	OS.GetWindowRect (handle, rect);
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	return new Point (width, height);
}

/**
 * Returns an array containing all shells which are 
 * descendents of the receiver.
 * <p>
 * @return the dialog shells
 *
 * @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 Shell [] getShells () {
	checkWidget ();
	int count = 0;
	Shell [] shells = display.getShells ();
	for (int i=0; i<shells.length; i++) {
		Control shell = shells [i];
		do {
			shell = shell.parent;
		} while (shell != null && shell != this);
		if (shell == this) count++;
	}
	int index = 0;
	Shell [] result = new Shell [count];
	for (int i=0; i<shells.length; i++) {
		Control shell = shells [i];
		do {
			shell = shell.parent;
		} while (shell != null && shell != this);
		if (shell == this) {
			result [index++] = shells [i];
		}
	}
	return result;
}

public boolean isEnabled () {
	checkWidget ();
	return getEnabled ();
}

public boolean isVisible () {
	checkWidget ();
	return getVisible ();
}

int hwndMDIClient () {
	if (hwndMDIClient == 0) {
		int widgetStyle = OS.MDIS_ALLCHILDSTYLES | OS.WS_CHILD | OS.WS_CLIPCHILDREN | OS.WS_CLIPSIBLINGS;
		hwndMDIClient = OS.CreateWindowEx (
			0,
			new TCHAR (0, "MDICLIENT", true),
			null,
			widgetStyle, 
			0, 0, 0, 0,
			handle,
			0,
			OS.GetModuleHandle (null),
			new CREATESTRUCT ());
//		OS.ShowWindow (hwndMDIClient, OS.SW_SHOW);
	}
	return hwndMDIClient;
}

/**
 * Moves the receiver to the top of the drawing order for
 * the display on which it was created (so that all other
 * shells on that display, which are not the receiver's
 * children will be drawn behind it), marks it visible,
 * sets the focus and asks the window manager to make the
 * shell active.
 *
 * @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 Control#moveAbove
 * @see Control#setFocus
 * @see Control#setVisible
 * @see Display#getActiveShell
 * @see Decorations#setDefaultButton
 * @see Shell#setActive
 * @see Shell#forceActive
 */
public void open () {
	checkWidget ();
	bringToTop ();
	/*
	* Feature on WinCE PPC.  A new application becomes
	* the foreground application only if it has at least
	* one visible window before the event loop is started.
	* The workaround is to explicitely force the shell to
	* be the foreground window.
	*/
	if (OS.IsWinCE) OS.SetForegroundWindow (handle);
	OS.SendMessage (handle, OS.WM_CHANGEUISTATE, OS.UIS_INITIALIZE, 0);
	setVisible (true);
	/*
	* Bug in Windows XP.  Despite the fact that an icon has been
	* set for a window, the task bar displays the wrong icon the
	* first time the window is made visible with ShowWindow() after
	* a call to BringToTop(), when a long time elapses between the
	* ShowWindow() and the time the event queue is read.  The icon
	* in the window trimming is correct but the one in the task
	* bar does not get updated.  The fix is to call PeekMessage()
	* with the flag PM_NOREMOVE and PM_QS_SENDMESSAGE to respond
	* to a cross thread WM_GETICON.
	* 
	* NOTE: This allows other cross thread messages to be delivered,
	* most notably WM_ACTIVATE.
	*/
	MSG msg = new MSG ();
	int flags = OS.PM_NOREMOVE | OS.PM_NOYIELD | OS.PM_QS_SENDMESSAGE;
	OS.PeekMessage (msg, 0, 0, 0, flags);
	if (!restoreFocus ()) traverseGroup (true);
}

void releaseChild () {
	/* Do nothing */
}

void releaseHandle () {
	super.releaseHandle ();
	hwndMDIClient = 0;
}

void releaseShells () {
	Shell [] shells = getShells ();
	for (int i=0; i<shells.length; i++) {
		Shell shell = shells [i];
		if (!shell.isDisposed ()) shell.releaseResources ();
	}
}

void releaseWidget () {
	releaseShells ();
	super.releaseWidget ();
	activeMenu = null;
	display.clearModal (this);
	if (lpstrTip != 0) {
		int hHeap = OS.GetProcessHeap ();
		OS.HeapFree (hHeap, 0, lpstrTip);
	}
	lpstrTip = 0;
	toolTipHandle = 0;
	if (brushes != null) {
		for (int i=0; i<brushes.length; i++) {
			int hBrush = brushes [i];
			if (hBrush != 0) OS.DeleteObject (hBrush);
		}
	}
	brushes = null;
	if (OS.IsDBLocale) {
		if (hIMC != 0) OS.ImmDestroyContext (hIMC);
	}
	lastActive = null;
	region = null;
}