shell.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

	if (parent != null) {
		if (OS.IsWin95) return bits;
		if ((OS.WIN32_MAJOR << 16 | OS.WIN32_MINOR) < (4 << 16 | 10)) {
			return bits;
		}
	}
	if ((style & SWT.ON_TOP) != 0) bits |= OS.WS_EX_TOPMOST;
	return bits;
}

TCHAR windowClass () {
	if (OS.IsSP) return DialogClass;
	return parent != null ? DialogClass : super.windowClass ();
}

int windowProc () {
	if (OS.IsSP) return DialogProc;
	return parent != null ? DialogProc : super.windowProc ();
}

int widgetStyle () {
	int bits = super.widgetStyle ();
	if (handle != 0) return bits | OS.WS_CHILD;
	bits &= ~OS.WS_CHILD;
	/*
	* Feature in WinCE.  Calling CreateWindowEx () with WS_OVERLAPPED
	* and a parent window causes the new window to become a WS_CHILD of
	* the parent instead of a dialog child.  The fix is to use WS_POPUP
	* for a window with a parent.  
	* 
	* Feature in WinCE PPC.  A window without a parent with WS_POPUP
	* always shows on top of the Pocket PC 'Today Screen'. The fix
	* is to not set WS_POPUP for a window without a parent on WinCE
	* devices.
	* 
	* NOTE: WS_POPUP causes CreateWindowEx () to ignore CW_USEDEFAULT
	* and causes the default window location and size to be zero.
	*/
	if (OS.IsWinCE) {
		if (OS.IsSP) return bits | OS.WS_POPUP;
		return parent == null ? bits : bits | OS.WS_POPUP;
	}
	
	/*
	* Use WS_OVERLAPPED for all windows, either dialog or top level
	* so that CreateWindowEx () will respect CW_USEDEFAULT and set
	* the default window location and size.
	* 
	* NOTE:  When a WS_OVERLAPPED window is created, Windows gives
	* the new window WS_CAPTION style bits.  These two constants are
	* as follows:
	* 
	* 	WS_OVERLAPPED = 0
	* 	WS_CAPTION = WS_BORDER | WS_DLGFRAME
	* 
	*/
	return bits | OS.WS_OVERLAPPED | OS.WS_CAPTION;
}

LRESULT WM_ACTIVATE (int wParam, int lParam) {
	if (OS.IsPPC) {
		/*
		* Note: this does not work when we get WM_ACTIVATE prior
		* to adding a listener.
		*/
		if (hooks (SWT.HardKeyDown) || hooks (SWT.HardKeyUp)) {
			int fActive = wParam & 0xFFFF;
			int hwnd = fActive != 0 ? handle : 0;
			for (int bVk=OS.VK_APP1; bVk<=OS.VK_APP6; bVk++) {
				OS.SHSetAppKeyWndAssoc ((byte) bVk, hwnd);
			}
		}
		/* Restore SIP state when window is activated */
		if ((wParam & 0xFFFF) != 0) {
			OS.SHSipPreference (handle, psai.fSipUp == 0 ? OS.SIP_DOWN : OS.SIP_UP);
		} 
	}

	/*
	* Bug in Windows XP.  When a Shell is deactivated, the
	* IME composition window does not go away. This causes
	* repaint issues.  The fix is to close the IME ourselves
	* when the Shell is deactivated.
	* 
	* Note.  When the Shell is reactivated, the text in the
	* composition window has been lost.
	*/
	if ((OS.WIN32_MAJOR << 16 | OS.WIN32_MINOR) >= (5 << 16 | 1)) {
		if ((wParam & 0xFFFF) == 0 && OS.IsDBLocale && hIMC != 0) {
			OS.ImmSetOpenStatus (hIMC, false);
		}
	}
	
	LRESULT result = super.WM_ACTIVATE (wParam, lParam);
	if (parent != null) return LRESULT.ZERO;
	return result;
}

LRESULT WM_COMMAND (int wParam, int lParam) {
	if (OS.IsPPC) {
		/*
		* Note in WinCE PPC:  Close the Shell when the "Done Button" has
		* been pressed. lParam is either 0 (PocketPC 2002) or the handle
		* to the Shell (PocketPC).
		*/
		int loWord = wParam & 0xFFFF;
		if (loWord == OS.IDOK && (lParam == 0 || lParam == handle)) {
			OS.PostMessage (handle, OS.WM_CLOSE, 0, 0);
			return LRESULT.ZERO;			
		}
	}
	/*
	* Feature in Windows.  On PPC, the menu is not actually an HMENU.
	* By observation, it is a tool bar that is configured to look like
	* a menu.  Therefore, when the PPC menu sends WM_COMMAND messages,
	* lParam is not zero because the WM_COMMAND was not sent from a menu.
	* Sub menu item events originate from the menu bar.  Top menu items
	* events originate from a tool bar.  The fix is to detect the source
	* of the WM_COMMAND and set lParam to zero to pretend that the message
	* came from a real Windows menu, not a tool bar.
	*/
	if (OS.IsPPC || OS.IsSP) {
		if (menuBar != null) {
			int hwndCB = menuBar.hwndCB;
			if (lParam != 0 && hwndCB != 0) {
				if (lParam == hwndCB) {
					return super.WM_COMMAND (wParam, 0);
				} else {
					int hwndChild = OS.GetWindow (hwndCB, OS.GW_CHILD);
					if (lParam == hwndChild) return super.WM_COMMAND (wParam, 0);					
				}
			}
		}
	}
	return super.WM_COMMAND (wParam, lParam);
}

LRESULT WM_DESTROY (int wParam, int lParam) {
	LRESULT result = super.WM_DESTROY (wParam, lParam);
	/*
	* When the shell is a WS_CHILD window of a non-SWT
	* window, the destroy code does not get called because
	* the non-SWT window does not call dispose ().  Instead,
	* the destroy code is called here in WM_DESTROY.
	*/
	int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
	if ((bits & OS.WS_CHILD) != 0) {
		releaseChild ();
		releaseResources ();
	}
	return result;
}

LRESULT WM_ENTERIDLE (int wParam, int lParam) {
	LRESULT result = super.WM_ENTERIDLE (wParam, lParam);
	if (result != null) return result;
	if (display.runAsyncMessages ()) display.wakeThread ();
	return result;
}

LRESULT WM_MOUSEACTIVATE (int wParam, int lParam) {
	LRESULT result = super.WM_MOUSEACTIVATE (wParam, lParam);
	if (result != null) return result;
	
	/*
	* Check for WM_MOUSEACTIVATE when an MDI shell is active
	* and stop the normal shell activation but allow the mouse
	* down to be delivered.
	*/
	int hittest = (short) (lParam & 0xFFFF);
	switch (hittest) {
		case OS.HTERROR:
		case OS.HTTRANSPARENT:
		case OS.HTNOWHERE:
			break;
		default: {
			Control control = display.getFocusControl ();
			if (control != null) {
				Decorations decorations = control.menuShell ();
				if (decorations.getShell () == this && decorations != this) {
					display.ignoreRestoreFocus = true;
					display.lastHittest = hittest;
					display.lastHittestControl = null;
					if (hittest == OS.HTMENU || hittest == OS.HTSYSMENU) {
						display.lastHittestControl = control;
						return null;
					}
					if (OS.IsWin95 && hittest == OS.HTCAPTION) {
						display.lastHittestControl = control;
					}
					return new LRESULT (OS.MA_NOACTIVATE);
				}
			}
		}
	}
	if (hittest == OS.HTMENU) return null;
	
	/*
	* Get the current location of the cursor,
	* not the location of the cursor when the
	* WM_MOUSEACTIVATE was generated.  This is
	* strictly incorrect but is necessary in
	* order to support Activate and Deactivate
	* events for embedded widgets that have
	* their own event loop.  In that case, the
	* cursor location reported by GetMessagePos
	* is the one for our event loop, not the
	* embedded widget's event loop.
	*/
	POINT pt = new POINT ();
	if (!OS.GetCursorPos (pt)) {
		int pos = OS.GetMessagePos ();
		pt.x = (short) (pos & 0xFFFF);
		pt.y = (short) (pos >> 16);
	}
	int hwnd = OS.WindowFromPoint (pt);
	if (hwnd == 0) return null;
	Control control = display.findControl (hwnd);
	setActiveControl (control);
	
	/*
	* This code is intentionally commented.  On some platforms,
	* shells that are created with SWT.NO_TRIM won't take focus
	* when the user clicks in the client area or on the border.
	* This behavior is usedful when emulating tool tip shells
	* Until this behavior is specified, this code will remain
	* commented.
	*/
//	if ((style & SWT.NO_TRIM) != 0) {
//		if (hittest == OS.HTBORDER || hittest == OS.HTCLIENT) {
//			return new LRESULT (OS.MA_NOACTIVATE);
//		}
//	}
	return null;
}

LRESULT WM_NCHITTEST (int wParam, int lParam) {
	if (!OS.IsWindowEnabled (handle)) return null;
	if (!isEnabled () || !isActive ()) {
		if (!Display.TrimEnabled) return new LRESULT (OS.HTNOWHERE);
		int hittest = callWindowProc (OS.WM_NCHITTEST, wParam, lParam);
		if (hittest == OS.HTCLIENT || hittest == OS.HTMENU) hittest = OS.HTBORDER;
		return new LRESULT (hittest);
	}
	if (menuBar != null && !menuBar.getEnabled ()) {
		int hittest = callWindowProc (OS.WM_NCHITTEST, wParam, lParam);
		if (hittest == OS.HTMENU) hittest = OS.HTBORDER;
		return new LRESULT (hittest);
	}
	return null;
}

LRESULT WM_NCLBUTTONDOWN (int wParam, int lParam) {
	LRESULT result = super.WM_NCLBUTTONDOWN (wParam, lParam);
	if (result != null) return result;
	/*
	* When the normal activation was interruped in WM_MOUSEACTIVATE
	* because the active shell was an MDI shell, set the active window
	* to the top level shell but lock the active window and stop focus
	* changes.  This allows the user to interact the top level shell
	* in the normal manner.
	*/
	if (!display.ignoreRestoreFocus) return result;
	Display display = this.display;
	int hwndActive = 0;
	boolean fixActive = OS.IsWin95 && display.lastHittest == OS.HTCAPTION;
	if (fixActive) hwndActive = OS.SetActiveWindow (handle);
	display.lockActiveWindow = true;
	int code = callWindowProc (OS.WM_NCLBUTTONDOWN, wParam, lParam);
	display.lockActiveWindow = false;
	if (fixActive) OS.SetActiveWindow (hwndActive);
	Control focusControl = display.lastHittestControl;
	if (focusControl != null && !focusControl.isDisposed ()) {
		focusControl.setFocus ();
	}
	display.lastHittestControl = null;
	display.ignoreRestoreFocus = false;
	return new LRESULT (code);
}

LRESULT WM_PALETTECHANGED (int wParam, int lParam) {
	if (wParam != handle) {
		int hPalette = display.hPalette;
		if (hPalette != 0) return selectPalette (hPalette);
	}
	return super.WM_PALETTECHANGED (wParam, lParam);
}

LRESULT WM_QUERYNEWPALETTE (int wParam, int lParam) {
	int hPalette = display.hPalette;
	if (hPalette != 0) return selectPalette (hPalette);
	return super.WM_QUERYNEWPALETTE (wParam, lParam);
}

LRESULT WM_SETCURSOR (int wParam, int lParam) {
	/*
	* Feature in Windows.  When the shell is disabled
	* by a Windows standard dialog (like a MessageBox
	* or FileDialog), clicking in the shell does not
	* bring the shell or the dialog to the front. The
	* fix is to detect this case and bring the shell
	* forward.
	*/
	int msg = (short) (lParam >> 16);
	if (msg == OS.WM_LBUTTONDOWN) {
		if (!Display.TrimEnabled) {
			Shell modalShell = display.getModalShell ();
			if (modalShell != null && !isActive ()) {
				int hwndModal = modalShell.handle;
				if (OS.IsWindowEnabled (hwndModal)) {
					OS.SetActiveWindow (hwndModal);
				}
			}
		}
		if (!OS.IsWindowEnabled (handle)) {
			if (!OS.IsWinCE) {
				int hwndPopup = OS.GetLastActivePopup (handle);
				if (hwndPopup != 0 && hwndPopup != handle) {
					if (display.getControl (hwndPopup) == null) {
						if (OS.IsWindowEnabled (hwndPopup)) {
							OS.SetActiveWindow (hwndPopup);
						}
					}
				}
			}
		}
	}
	/*
	* When the shell that contains a cursor is disabled,
	* WM_SETCURSOR is called with HTERROR.  Normally,
	* when a control is disabled, the parent will get
	* mouse and cursor events.  In the case of a disabled
	* shell, there is no enabled parent.  In order to
	* show the cursor when a shell is disabled, it is
	* necessary to override WM_SETCURSOR when called
	* with HTERROR to set the cursor but only when the
	* mouse is in the client area of the shell.
	*/
	int hitTest = (short) (lParam & 0xFFFF);
	if (hitTest == OS.HTERROR) {
		if (!getEnabled ()) {
			Control control = display.getControl (wParam);
			if (control == this && cursor != null) {
				POINT pt = new POINT ();
				if (OS.GetCursorPos (pt)) {
					OS.ScreenToClient (handle, pt);
					RECT rect = new RECT ();
					OS.GetClientRect (handle, rect);
					if (OS.PtInRect (rect, pt)) {
						OS.SetCursor (cursor.handle);
						switch (msg) {
							case OS.WM_LBUTTONDOWN:
							case OS.WM_RBUTTONDOWN:
							case OS.WM_MBUTTONDOWN:
								OS.MessageBeep (OS.MB_OK);
						}
						return LRESULT.ONE;
					}
				}
			}
		}
	}
	return super.WM_SETCURSOR (wParam, lParam);
}

LRESULT WM_SETTINGCHANGE (int wParam, int lParam) {
	LRESULT result = super.WM_SETTINGCHANGE (wParam, lParam);
	if (result != null) return result;
	if (OS.IsPPC) {
		if (wParam == OS.SPI_SETSIPINFO) {
			/* 
			* The SIP is in a new state.  Cache its new value.
			* Resize the Shell if it has the style SWT.RESIZE.
			* Note that SHHandleWMSettingChange resizes the
			* Shell and also updates the cached state.
			*/
			if ((style & SWT.RESIZE) != 0) {
				OS.SHHandleWMSettingChange (handle, wParam, lParam, psai);
				return LRESULT.ZERO;
			} else {
				SIPINFO pSipInfo = new SIPINFO ();
				pSipInfo.cbSize = SIPINFO.sizeof;
				OS.SipGetInfo (pSipInfo);
				psai.fSipUp = pSipInfo.fdwFlags & OS.SIPF_ON;					
			}
		}
	}
	return result;
}

LRESULT WM_SHOWWINDOW (int wParam, int lParam) {
	LRESULT result = super.WM_SHOWWINDOW (wParam, lParam);
	if (result != null) return result;
	/*
	* Bug in Windows.  If the shell is hidden while the parent
	* is iconic,  Windows shows the shell when the parent is
	* deiconified.  This does not happen if the shell is hidden
	* while the parent is not an icon.  The fix is to track
	* visible state for the shell and refuse to show the shell
	* when the parent is shown.
	*/
	if (lParam == OS.SW_PARENTOPENING) {
		Control control = this;
		while (control != null) {
			Shell shell = control.getShell ();
			if (!shell.showWithParent) return LRESULT.ZERO;
			control = control.parent;
		}
	}
	return result;
}

}