Python win32con 模块，GWL_WNDPROC 实例源码

def __init__ (self):
        wx.Frame.__init__ (self, None, title="Clipboard viewer", size=(250,150))

        self.first   = True
        self.nextWnd = None

        # Get native window handle of this wxWidget Frame.
        self.hwnd    = self.GetHandle ()

        # Set the WndProc to our function.
        self.oldWndProc = win32gui.SetWindowLong (self.hwnd,
                                                  win32con.GWL_WNDPROC,
                                                  self.MyWndProc)

        try:
            self.nextWnd = win32clipboard.SetClipboardViewer (self.hwnd)
        except win32api.error:
            if win32api.GetLastError () == 0:
                # information that there is no other window in chain
                pass
            else:
                raise

def MyWndProc (self, hWnd, msg, wParam, lParam):
        if msg == win32con.WM_CHANGECBCHAIN:
            self.OnChangeCBChain (msg, wParam, lParam)
        elif msg == win32con.WM_DRAWCLIPBOARD:
            self.OnDrawClipboard (msg, wParam, lParam)

        # Restore the old WndProc. Notice the use of win32api
        # instead of win32gui here. This is to avoid an error due to
        # not passing a callable object.
        if msg == win32con.WM_DESTROY:
            if self.nextWnd:
               win32clipboard.ChangeClipboardChain (self.hwnd, self.nextWnd)
            else:
               win32clipboard.ChangeClipboardChain (self.hwnd, 0)

            win32api.SetWindowLong (self.hwnd,
                                    win32con.GWL_WNDPROC,
                                    self.oldWndProc)

        # Pass all messages (in this case, yours may be different) on
        # to the original WndProc
        return win32gui.CallWindowProc (self.oldWndProc,
                                        hWnd, msg, wParam, lParam)

def _CreateMainWindow(self, prev, settings, browser, rect):
        # Creates a parent window that hosts the view window.  This window
        # gets the control notifications etc sent from the child.
        style = win32con.WS_CHILD | win32con.WS_VISIBLE #
        wclass_name = "ShellViewDemo_DefView"
        # Register the Window class.
        wc = win32gui.WNDCLASS()
        wc.hInstance = win32gui.dllhandle
        wc.lpszClassName = wclass_name
        wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW
        try:
            win32gui.RegisterClass(wc)
        except win32gui.error, details:
            # Should only happen when this module is reloaded
            if details[0] != winerror.ERROR_CLASS_ALREADY_EXISTS:
                raise

        message_map = {
                win32con.WM_DESTROY: self.OnDestroy,
                win32con.WM_COMMAND: self.OnCommand,
                win32con.WM_NOTIFY:  self.OnNotify,
                win32con.WM_CONTEXTMENU: self.OnContextMenu,
                win32con.WM_SIZE: self.OnSize,
        }

        self.hwnd = win32gui.CreateWindow( wclass_name, "", style, \
                rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1],
                self.hwnd_parent, 0, win32gui.dllhandle, None)
        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)
        print "View 's hwnd is", self.hwnd
        return self.hwnd

def CreateViewWindow(self, prev, settings, browser, rect):
        print "ScintillaShellView.CreateViewWindow", prev, settings, browser, rect
        # Make sure scintilla.dll is loaded.  If not, find it on sys.path
        # (which it generally is for Pythonwin)
        try:
            win32api.GetModuleHandle("Scintilla.dll")
        except win32api.error:
            for p in sys.path:
                fname = os.path.join(p, "Scintilla.dll")
                if not os.path.isfile(fname):
                    fname = os.path.join(p, "Build", "Scintilla.dll")
                if os.path.isfile(fname):
                    win32api.LoadLibrary(fname)
                    break
            else:
                raise RuntimeError("Can't find scintilla!")

        style = win32con.WS_CHILD | win32con.WS_VSCROLL | \
                win32con.WS_HSCROLL | win32con.WS_CLIPCHILDREN | \
                win32con.WS_VISIBLE
        self.hwnd = win32gui.CreateWindow("Scintilla", "Scintilla", style,
                              rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1], 
                              self.hwnd_parent, 1000, 0, None)

        message_map = {
                win32con.WM_SIZE: self.OnSize,
        }
#        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)

        file_data = file(self.filename, "U").read()

        self._SetupLexer()
        self._SendSci(scintillacon.SCI_ADDTEXT, len(file_data), file_data)
        if self.lineno != None:
            self._SendSci(scintillacon.SCI_GOTOLINE, self.lineno)
        print "Scintilla's hwnd is", self.hwnd

def _CreateMainWindow(self, prev, settings, browser, rect):
        # Creates a parent window that hosts the view window.  This window
        # gets the control notifications etc sent from the child.
        style = win32con.WS_CHILD | win32con.WS_VISIBLE #
        wclass_name = "ShellViewDemo_DefView"
        # Register the Window class.
        wc = win32gui.WNDCLASS()
        wc.hInstance = win32gui.dllhandle
        wc.lpszClassName = wclass_name
        wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW
        try:
            win32gui.RegisterClass(wc)
        except win32gui.error, details:
            # Should only happen when this module is reloaded
            if details[0] != winerror.ERROR_CLASS_ALREADY_EXISTS:
                raise

        message_map = {
                win32con.WM_DESTROY: self.OnDestroy,
                win32con.WM_COMMAND: self.OnCommand,
                win32con.WM_NOTIFY:  self.OnNotify,
                win32con.WM_CONTEXTMENU: self.OnContextMenu,
                win32con.WM_SIZE: self.OnSize,
        }

        self.hwnd = win32gui.CreateWindow( wclass_name, "", style, \
                rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1],
                self.hwnd_parent, 0, win32gui.dllhandle, None)
        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)
        print "View 's hwnd is", self.hwnd
        return self.hwnd

def CreateViewWindow(self, prev, settings, browser, rect):
        print "ScintillaShellView.CreateViewWindow", prev, settings, browser, rect
        # Make sure scintilla.dll is loaded.  If not, find it on sys.path
        # (which it generally is for Pythonwin)
        try:
            win32api.GetModuleHandle("Scintilla.dll")
        except win32api.error:
            for p in sys.path:
                fname = os.path.join(p, "Scintilla.dll")
                if not os.path.isfile(fname):
                    fname = os.path.join(p, "Build", "Scintilla.dll")
                if os.path.isfile(fname):
                    win32api.LoadLibrary(fname)
                    break
            else:
                raise RuntimeError("Can't find scintilla!")

        style = win32con.WS_CHILD | win32con.WS_VSCROLL | \
                win32con.WS_HSCROLL | win32con.WS_CLIPCHILDREN | \
                win32con.WS_VISIBLE
        self.hwnd = win32gui.CreateWindow("Scintilla", "Scintilla", style,
                              rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1], 
                              self.hwnd_parent, 1000, 0, None)

        message_map = {
                win32con.WM_SIZE: self.OnSize,
        }
#        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)

        file_data = file(self.filename, "U").read()

        self._SetupLexer()
        self._SendSci(scintillacon.SCI_ADDTEXT, len(file_data), file_data)
        if self.lineno != None:
            self._SendSci(scintillacon.SCI_GOTOLINE, self.lineno)
        print "Scintilla's hwnd is", self.hwnd

def _CreateMainWindow(self, prev, settings, browser, rect):
        # Creates a parent window that hosts the view window.  This window
        # gets the control notifications etc sent from the child.
        style = win32con.WS_CHILD | win32con.WS_VISIBLE #
        wclass_name = "ShellViewDemo_DefView"
        # Register the Window class.
        wc = win32gui.WNDCLASS()
        wc.hInstance = win32gui.dllhandle
        wc.lpszClassName = wclass_name
        wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW
        try:
            win32gui.RegisterClass(wc)
        except win32gui.error as details:
            # Should only happen when this module is reloaded
            if details[0] != winerror.ERROR_CLASS_ALREADY_EXISTS:
                raise

        message_map = {
                win32con.WM_DESTROY: self.OnDestroy,
                win32con.WM_COMMAND: self.OnCommand,
                win32con.WM_NOTIFY:  self.OnNotify,
                win32con.WM_CONTEXTMENU: self.OnContextMenu,
                win32con.WM_SIZE: self.OnSize,
        }

        self.hwnd = win32gui.CreateWindow( wclass_name, "", style, \
                rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1],
                self.hwnd_parent, 0, win32gui.dllhandle, None)
        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)
        print("View 's hwnd is", self.hwnd)
        return self.hwnd

def CreateViewWindow(self, prev, settings, browser, rect):
        print("ScintillaShellView.CreateViewWindow", prev, settings, browser, rect)
        # Make sure scintilla.dll is loaded.  If not, find it on sys.path
        # (which it generally is for Pythonwin)
        try:
            win32api.GetModuleHandle("Scintilla.dll")
        except win32api.error:
            for p in sys.path:
                fname = os.path.join(p, "Scintilla.dll")
                if not os.path.isfile(fname):
                    fname = os.path.join(p, "Build", "Scintilla.dll")
                if os.path.isfile(fname):
                    win32api.LoadLibrary(fname)
                    break
            else:
                raise RuntimeError("Can't find scintilla!")

        style = win32con.WS_CHILD | win32con.WS_VSCROLL | \
                win32con.WS_HSCROLL | win32con.WS_CLIPCHILDREN | \
                win32con.WS_VISIBLE
        self.hwnd = win32gui.CreateWindow("Scintilla", "Scintilla", style,
                              rect[0], rect[1], rect[2]-rect[0], rect[3]-rect[1], 
                              self.hwnd_parent, 1000, 0, None)

        message_map = {
                win32con.WM_SIZE: self.OnSize,
        }
#        win32gui.SetWindowLong(self.hwnd, win32con.GWL_WNDPROC, message_map)

        file_data = file(self.filename, "U").read()

        self._SetupLexer()
        self._SendSci(scintillacon.SCI_ADDTEXT, len(file_data), file_data)
        if self.lineno != None:
            self._SendSci(scintillacon.SCI_GOTOLINE, self.lineno)
        print("Scintilla's hwnd is", self.hwnd)

def WndProcManage(wnd):
        if not hasattr(wnd, 'GetHandle'):
            return False

        # Make a dictionary of message names to be used for printing below
        if PRINT_MESSAGES:
            msgdict = dict()
            for name in dir(win32con):
                if name.startswith('WM_'):
                    value = getattr(win32con, name)
                    msgdict[value] = name

        _oldWndProc = win32gui.GetWindowLong(wnd.GetHandle(),
                                             win32con.GWL_WNDPROC)

        def MyWndProc(self, hwnd, msg, wParam, lParam):
            # Display what we've got.
            if PRINT_MESSAGES:
                print (msgdict.get(msg), msg, wParam, lParam)

            # Restore the old WndProc.  Notice the use of win32api
            # instead of win32gui here.  This is to avoid an error due to
            # not passing a callable object.
            if msg == win32con.WM_DESTROY:
                win32api.SetWindowLong(self.GetHandle(),
                                       win32con.GWL_WNDPROC,
                                       _oldWndProc)

            stopproc = False
            for cb, cbtrigger in CALLBACKS[self]:
                if cbtrigger(self, msg, wParam, lParam):
                    if not cb(self, msg, wParam, lParam):
                        stopproc = True
                        break

            if stopproc:
                return
            # Pass all messages (in this case, yours may be different) on to
            # the original WndProc
            return win32gui.CallWindowProc(_oldWndProc,
                                           hwnd, msg,
                                           wParam,
                                           lParam)

        # Bind the function to the passed object
        _newWndProc = MyWndProc.__get__(wnd, wnd.__class__)

        # Set the WndProc to our function
        win32gui.SetWindowLong(wnd.GetHandle(),
                               win32con.GWL_WNDPROC,
                               _newWndProc)
        return True