composite.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

			Control control = tabList [i];
			if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
			if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
			if (control.parent != this) error (SWT.ERROR_INVALID_PARENT);
		}
		Control [] newList = new Control [tabList.length];
		System.arraycopy (tabList, 0, newList, 0, tabList.length);
		tabList = newList;
	} 
	this.tabList = tabList;
}

void setResizeChildren (boolean resize) {
	if (resize) {
		resizeChildren ();
	} else {
		int count = getChildrenCount ();
		if (count > 1 && lpwp == null) {
			lpwp = new WINDOWPOS [count];
		}
	}
}

boolean setTabGroupFocus () {
	if (isTabItem ()) return setTabItemFocus ();
	boolean takeFocus = (style & SWT.NO_FOCUS) == 0;
	if ((state & CANVAS) != 0) {
		takeFocus = hooksKeys ();
		if ((style & SWT.EMBEDDED) != 0) takeFocus = true;
	}
	if (takeFocus && setTabItemFocus ()) return true;
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child.isTabItem () && child.setRadioFocus ()) return true;
	}
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child.isTabItem () && child.setTabItemFocus ()) return true;
	}
	return false;
}

String toolTipText (NMTTDISPINFO hdr) {
	if ((hdr.uFlags & OS.TTF_IDISHWND) == 0) {
		return null;
	}
	int hwnd = hdr.idFrom;
	if (hwnd == 0) return null;
	Control control = display.getControl (hwnd);
	if (control == null) return null;
	return control.toolTipText;
}

boolean translateMnemonic (Event event, Control control) {
	if (super.translateMnemonic (event, control)) return true;
	if (control != null) {
		Control [] children = _getChildren ();
		for (int i=0; i<children.length; i++) {
			Control child = children [i];
			if (child.translateMnemonic (event, control)) return true;
		}
	}
	return false;
}

boolean translateTraversal (MSG msg) {
	if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) return false;
	return super.translateTraversal (msg);
}

void updateFont (Font oldFont, Font newFont) {
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control control = children [i];
		if (!control.isDisposed ()) {
			control.updateFont (oldFont, newFont);
		}
	}
	super.updateFont (oldFont, newFont);
	layout (true);
}

int widgetStyle () {
	/* Force clipping of children by setting WS_CLIPCHILDREN */
	return super.widgetStyle () | OS.WS_CLIPCHILDREN;
}

LRESULT WM_ERASEBKGND (int wParam, int lParam) {
	LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
	if (result != null) return result;
	if ((state & CANVAS) != 0) {
		/* Return zero to indicate that the background was not erased */
		if ((style & SWT.NO_BACKGROUND) != 0) return LRESULT.ZERO;
	}
	return result;
}

LRESULT WM_GETDLGCODE (int wParam, int lParam) {
	LRESULT result = super.WM_GETDLGCODE (wParam, lParam);
	if (result != null) return result;
	if ((state & CANVAS) != 0) {
		if ((style & SWT.NO_FOCUS) != 0) return new LRESULT (OS.DLGC_STATIC);
		if (hooksKeys ()) {
			int flags = OS.DLGC_WANTALLKEYS | OS.DLGC_WANTARROWS | OS.DLGC_WANTTAB;
			return new LRESULT (flags);
		}
		if (OS.GetWindow (handle, OS.GW_CHILD) != 0) return new LRESULT (OS.DLGC_STATIC);
	}
	return result;
}

LRESULT WM_GETFONT (int wParam, int lParam) {
	LRESULT result = super.WM_GETFONT (wParam, lParam);
	if (result != null) return result;
	int code = callWindowProc (OS.WM_GETFONT, wParam, lParam);
	if (code != 0) return new LRESULT (code);
	if (font == 0) font = defaultFont ();
	return new LRESULT (font);
}

LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
	LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);

	/* Set focus for a canvas with no children */
	if ((state & CANVAS) != 0) {
		if ((style & SWT.NO_FOCUS) == 0 && hooksKeys ()) {
			if (OS.GetWindow (handle, OS.GW_CHILD) == 0) setFocus ();
		}
	}
	return result;
}

LRESULT WM_NOTIFY (int wParam, int lParam) {
	if (!OS.IsWinCE) {
		NMHDR hdr = new NMHDR ();
		OS.MoveMemory (hdr, lParam, NMHDR.sizeof);
		switch (hdr.code) {
			/*
			* Feature in Windows.  When the tool tip control is
			* created, the parent of the tool tip is the shell.
			* If SetParent () is used to reparent the tool bar
			* into a new shell, the tool tip is not reparented
			* and pops up underneath the new shell.  The fix is
			* to make sure the tool tip is a topmost window.
			*/
			case OS.TTN_SHOW:
			case OS.TTN_POP: {
				/*
				* Bug in Windows 98 and NT.  Setting the tool tip 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.  The fix is to
				* lock the z-order of the active window.
				* 
				* Feature in Windows.  Using SetWindowPos() with HWND_NOTOPMOST
				* to clear the topmost state of a window whose parent is already
				* topmost clears the topmost state of the parent.  The fix is to
				* check if the parent is already on top and neither set or clear
				* the topmost status of the tool tip.
				*/
				int hwndParent = hdr.hwndFrom;
				do {
					hwndParent = OS.GetParent (hwndParent);
					if (hwndParent == 0) break;
					int style = OS.GetWindowLong (hwndParent, OS.GWL_EXSTYLE);
					if ((style & OS.WS_EX_TOPMOST) != 0) break;
				} while (true);
				if (hwndParent != 0) break;
				display.lockActiveWindow = true;
				int flags = OS.SWP_NOACTIVATE | OS.SWP_NOMOVE | OS.SWP_NOSIZE;
				int hwndInsertAfter = hdr.code == OS.TTN_SHOW ? OS.HWND_TOPMOST : OS.HWND_NOTOPMOST;
				SetWindowPos (hdr.hwndFrom, hwndInsertAfter, 0, 0, 0, 0, flags);
				display.lockActiveWindow = false;
				break;
			}
			/*
			* Bug in Windows 98.  For some reason, the tool bar control
			* sends both TTN_GETDISPINFOW and TTN_GETDISPINFOA to get
			* the tool tip text and the tab folder control sends only 
			* TTN_GETDISPINFOW.  The fix is to handle only TTN_GETDISPINFOW,
			* even though it should never be sent on Windows 98.
			*
			* NOTE:  Because the size of NMTTDISPINFO differs between
			* Windows 98 and NT, guard against the case where the wrong
			* kind of message occurs by inlining the memory moves and
			* the UNICODE conversion code.
			*/
			case OS.TTN_GETDISPINFOA:
			case OS.TTN_GETDISPINFOW: {
				NMTTDISPINFO lpnmtdi;
				if (hdr.code == OS.TTN_GETDISPINFOA) {
					lpnmtdi = new NMTTDISPINFOA ();
					OS.MoveMemory ((NMTTDISPINFOA)lpnmtdi, lParam, NMTTDISPINFOA.sizeof);
				} else {
					lpnmtdi = new NMTTDISPINFOW ();
					OS.MoveMemory ((NMTTDISPINFOW)lpnmtdi, lParam, NMTTDISPINFOW.sizeof);
				}
				String string = toolTipText (lpnmtdi);
				if (string != null) {
					Shell shell = getShell ();
					string = Display.withCrLf (string);
					int length = string.length ();
					char [] chars = new char [length + 1];
					string.getChars (0, length, chars, 0);
					
					/*
					* Ensure that the orientation of the tool tip matches
					* the orientation of the control.
					*/
					int hwnd = hdr.idFrom;
					if (hwnd != 0 && ((lpnmtdi.uFlags & OS.TTF_IDISHWND) != 0)) {
						Control control = display.getControl (hwnd);
						if (control != null) {
							if ((control.getStyle () & SWT.RIGHT_TO_LEFT) != 0) {
								lpnmtdi.uFlags |= OS.TTF_RTLREADING;
							} else {
								lpnmtdi.uFlags &= ~OS.TTF_RTLREADING;
							}
						}
					}
					
					if (hdr.code == OS.TTN_GETDISPINFOA) {
						byte [] bytes = new byte [chars.length * 2];
						OS.WideCharToMultiByte (OS.CP_ACP, 0, chars, chars.length, bytes, bytes.length, null, null);
						shell.setToolTipText (lpnmtdi, bytes);
						OS.MoveMemory (lParam, (NMTTDISPINFOA)lpnmtdi, NMTTDISPINFOA.sizeof);
					} else {
						shell.setToolTipText (lpnmtdi, chars);
						OS.MoveMemory (lParam, (NMTTDISPINFOW)lpnmtdi, NMTTDISPINFOW.sizeof);
					}
					return LRESULT.ZERO;
				}
				break;
			}
		}
	}
	return super.WM_NOTIFY (wParam, lParam);
}

LRESULT WM_PAINT (int wParam, int lParam) {
	if ((state & CANVAS) == 0) {
		return super.WM_PAINT (wParam, lParam);
	}

	/* Set the clipping bits */
	int oldBits = 0, newBits = 0;
	if (!OS.IsWinCE) {
		oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE);
		newBits = oldBits | OS.WS_CLIPSIBLINGS | OS.WS_CLIPCHILDREN;	
		if (newBits != oldBits) OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
	}

	/* Paint the control and the background */
	PAINTSTRUCT ps = new PAINTSTRUCT ();
	if (hooks (SWT.Paint)) {
		
		/* Get the damage */
		int [] lpRgnData = null;
		boolean isComplex = false;
		boolean exposeRegion = false;
		if ((style & SWT.NO_MERGE_PAINTS) != 0) {
			int rgn = OS.CreateRectRgn (0, 0, 0, 0);
			isComplex = OS.GetUpdateRgn (handle, rgn, false) == OS.COMPLEXREGION;
			if (isComplex) {
				int nBytes = OS.GetRegionData (rgn, 0, null);
				lpRgnData = new int [nBytes / 4];
				exposeRegion = OS.GetRegionData (rgn, nBytes, lpRgnData) != 0;
			}
			OS.DeleteObject (rgn);
		}
	
		/* Create the paint GC */
		GCData data = new GCData ();
		data.ps = ps;
		GC gc = GC.win32_new (this, data);
		int hDC = gc.handle;
		
		/* Send the paint event */
		Event event = new Event ();
		event.gc = gc;
		if (isComplex && exposeRegion) {
			RECT rect = new RECT ();
			int count = lpRgnData [2];
			for (int i=0; i<count; i++) {
				OS.SetRect (rect,
					lpRgnData [8 + (i << 2)],
					lpRgnData [8 + (i << 2) + 1],
					lpRgnData [8 + (i << 2) + 2],
					lpRgnData [8 + (i << 2) + 3]);
				if ((style & SWT.NO_BACKGROUND) == 0) {
					drawBackground (hDC, rect);
				}
				event.x = rect.left;
				event.y = rect.top;
				event.width = rect.right - rect.left;
				event.height = rect.bottom - rect.top;
				event.count = count - 1 - i;
				/*
				* It is possible (but unlikely), that application
				* code could have disposed the widget in the paint
				* event.  If this happens, attempt to give back the
				* paint GC anyways because this is a scarce Windows
				* resource.
				*/
				sendEvent (SWT.Paint, event);
				if (isDisposed ()) break;
			}
		} else {
			if ((style & SWT.NO_BACKGROUND) == 0) {
				RECT rect = new RECT ();
				OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
				drawBackground (hDC, rect);
			}
			event.x = ps.left;
			event.y = ps.top;
			event.width = ps.right - ps.left;
			event.height = ps.bottom - ps.top;
			sendEvent (SWT.Paint, event);
		}
		// widget could be disposed at this point
	
		/* Dispose the paint GC */
		event.gc = null;
		gc.dispose ();
	} else {
		int hDC = OS.BeginPaint (handle, ps);
		if ((style & SWT.NO_BACKGROUND) == 0) {
			RECT rect = new RECT ();
			OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
			drawBackground (hDC, rect);
		}
		OS.EndPaint (handle, ps);
	}

	/* Restore the clipping bits */
	if (!OS.IsWinCE) { 
		if (newBits != oldBits) {
			/*
			* It is possible (but unlikely), that application
			* code could have disposed the widget in the paint
			* event.  If this happens, don't attempt to restore
			* the style.
			*/
			if (!isDisposed ()) {
				OS.SetWindowLong (handle, OS.GWL_STYLE, oldBits);
			}
		}
	}
	return LRESULT.ZERO;
}

LRESULT WM_PRINTCLIENT (int wParam, int lParam) {
	LRESULT result = super.WM_PRINTCLIENT (wParam, lParam);
	if (result != null) return result;
	if ((state & CANVAS) != 0) {
		forceResize ();
		int nSavedDC = OS.SaveDC (wParam);
		RECT rect = new RECT ();
		OS.GetClientRect (handle, rect);
		if ((style & SWT.NO_BACKGROUND) == 0) {
			drawBackground (wParam, rect);
		}
		GCData data = new GCData ();
		data.device = display;
		GC gc = GC.win32_new (wParam, data);
		Event event = new Event ();
		event.gc = gc;
		event.x = rect.left;
		event.y = rect.top;
		event.width = rect.right - rect.left;
		event.height = rect.bottom - rect.top;
		sendEvent (SWT.Paint, event);
		event.gc = null;
		gc.dispose ();
		OS.RestoreDC (wParam, nSavedDC);
	}
	return result;
}

LRESULT WM_SETFONT (int wParam, int lParam) {
	return super.WM_SETFONT (font = wParam, lParam);
}

LRESULT WM_SIZE (int wParam, int lParam) {
	
	/* Begin deferred window positioning */
	setResizeChildren (false);
	
	/* Resize and Layout */
	LRESULT result = super.WM_SIZE (wParam, lParam);
	/*
	* It is possible (but unlikely), that application
	* code could have disposed the widget in the resize
	* event.  If this happens, end the processing of the
	* Windows message by returning the result of the
	* WM_SIZE message.
	*/
	if (isDisposed ()) return result;
	if (layout != null) layout.layout (this, false);

	/* End deferred window positioning */
	setResizeChildren (true);
	
	/* Damage the widget to cause a repaint */
	if ((state & CANVAS) != 0) {
		if ((style & SWT.NO_REDRAW_RESIZE) == 0) {
			if (hooks (SWT.Paint)) {
				OS.InvalidateRect (handle, null, true);
			}
		}
	}

	/* Resize the embedded window */
	if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) {
		int hwndChild = OS.GetWindow (handle, OS.GW_CHILD);
		if (hwndChild != 0) {
			int threadId = OS.GetWindowThreadProcessId (hwndChild, null);
			if (threadId != OS.GetCurrentThreadId ()) {
				if (display.msgHook == 0) {
					if (!OS.IsWinCE) {
						display.getMsgCallback = new Callback (display, "getMsgProc", 3);
						display.getMsgProc = display.getMsgCallback.getAddress ();
						if (display.getMsgProc == 0) error (SWT.ERROR_NO_MORE_CALLBACKS);
						display.msgHook = OS.SetWindowsHookEx (OS.WH_GETMESSAGE, display.getMsgProc, OS.GetLibraryHandle(), threadId);
					}
				}
				OS.PostThreadMessage (threadId, Display.SWT_RESIZE, hwndChild, lParam);
			}
		}
	}
	return result;
}

LRESULT WM_SYSCOLORCHANGE (int wParam, int lParam) {
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		int hwndChild = children [i].handle;
		OS.SendMessage (hwndChild, OS.WM_SYSCOLORCHANGE, 0, 0);
	}
	return null;
}

LRESULT WM_SYSCOMMAND (int wParam, int lParam) {
	LRESULT result = super.WM_SYSCOMMAND (wParam, lParam);
	if (result != null) return result;
		
	/*
	* Check to see if the command is a system command or
	* a user menu item that was added to the system menu.
	*/
	if ((wParam & 0xF000) == 0) return result;

	/*
	* Bug in Windows.  When a vertical or horizontal scroll bar is
	* hidden or shown while the opposite scroll bar is being scrolled
	* by the user (with WM_HSCROLL code SB_LINEDOWN), the scroll bar
	* does not redraw properly.  The fix is to detect this case and
	* redraw the non-client area.
	*/
	if (!OS.IsWinCE) {
		int cmd = wParam & 0xFFF0;
		switch (cmd) {
			case OS.SC_HSCROLL:
			case OS.SC_VSCROLL:
				boolean showHBar = horizontalBar != null && horizontalBar.getVisible ();
				boolean showVBar = verticalBar != null && verticalBar.getVisible ();
				int code = callWindowProc (OS.WM_SYSCOMMAND, wParam, lParam);
				if ((showHBar != (horizontalBar != null && horizontalBar.getVisible ())) ||
					(showVBar != (verticalBar != null && verticalBar.getVisible ()))) {
						int flags = OS.RDW_FRAME | OS.RDW_INVALIDATE | OS.RDW_UPDATENOW;
						OS.RedrawWindow (handle, null, 0, flags);
					}		
				if (code == 0) return LRESULT.ZERO;
				return new LRESULT (code);
		}
	}
	/* Return the result */
	return result;
}

}