X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4dba84be231243149a45a286a651d02be8487423..4cb1706ae52c02214a4540c6c4b6882bed5af416:/src/motif/textctrl.cpp?ds=sidebyside

diff --git a/src/motif/textctrl.cpp b/src/motif/textctrl.cpp
index 845019c525..3a66bd8ff8 100644
--- a/src/motif/textctrl.cpp
+++ b/src/motif/textctrl.cpp
@@ -6,152 +6,215 @@
 // Created:     17/09/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
-// Licence:   	wxWindows licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
 #ifdef __GNUG__
-#pragma implementation "textctrl.h"
+    #pragma implementation "textctrl.h"
+#endif
+
+#ifdef __VMS
+#define XtParent XTPARENT
 #endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fstream.h>
+#include <ctype.h>
 
 #include "wx/textctrl.h"
 #include "wx/settings.h"
 #include "wx/filefn.h"
 #include "wx/utils.h"
 
-#if defined(__BORLANDC__) && !defined(__WIN32__)
-#include <alloc.h>
-#else
-#ifndef __GNUWIN32__
-#include <malloc.h>
-#endif
+#ifdef __VMS__
+#pragma message disable nosimpint
 #endif
-
 #include <Xm/Text.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <ctype.h>
+#ifdef __VMS__
+#pragma message enable nosimpint
+#endif
 
 #include "wx/motif/private.h"
 
-static void 
-wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer ptr);
-static void 
-wxTextWindowModifyProc (Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
-static void 
-wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
-static void 
-wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
-static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
-                                     XmAnyCallbackStruct *ptr);
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
 
-#if !USE_SHARED_LIBRARY
-IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
+// helper: inserts the new text in the value of the text ctrl and returns the
+// result in place
+static void MergeChangesIntoString(wxString& value,
+                                   XmTextVerifyCallbackStruct *textStruct);
 
-BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
-EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
-EVT_CHAR(wxTextCtrl::OnChar)
-END_EVENT_TABLE()
-#endif
+// callbacks
+static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
+static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
+static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
+static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
+static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
+
+    IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
+
+    BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
+        EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
+        EVT_CHAR(wxTextCtrl::OnChar)
+
+    EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
+    EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
+    EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
+    EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
+    EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
+
+    EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
+    EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
+    EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
+    EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
+    EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
+
+    END_EVENT_TABLE()
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxTextCtrl
+// ----------------------------------------------------------------------------
 
 // Text item
 wxTextCtrl::wxTextCtrl()
-#ifndef NO_TEXT_WINDOW_STREAM
-:streambuf()
-#endif
 {
-    m_fileName = "";
     m_tempCallbackStruct = (void*) NULL;
     m_modified = FALSE;
     m_processedDefault = FALSE;
 }
 
-bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
+bool wxTextCtrl::Create(wxWindow *parent,
+                        wxWindowID id,
                         const wxString& value,
                         const wxPoint& pos,
-                        const wxSize& size, long style,
+                        const wxSize& size,
+                        long style,
                         const wxValidator& validator,
                         const wxString& name)
 {
     m_tempCallbackStruct = (void*) NULL;
     m_modified = FALSE;
     m_processedDefault = FALSE;
-    m_fileName = "";
     //    m_backgroundColour = parent->GetBackgroundColour();
     m_backgroundColour = * wxWHITE;
     m_foregroundColour = parent->GetForegroundColour();
-    
+
     SetName(name);
     SetValidator(validator);
-    if (parent) parent->AddChild(this);
-    
+    if (parent)
+        parent->AddChild(this);
+
     m_windowStyle = style;
-    
+
     if ( id == -1 )
         m_windowId = (int)NewControlId();
     else
         m_windowId = id;
-    
+
     Widget parentWidget = (Widget) parent->GetClientWidget();
-    
+
     bool wantHorizScrolling = ((m_windowStyle & wxHSCROLL) != 0);
-    
+
     // If we don't have horizontal scrollbars, we want word wrap.
     bool wantWordWrap = !wantHorizScrolling;
-    
+
     if (m_windowStyle & wxTE_MULTILINE)
     {
         Arg args[2];
         XtSetArg (args[0], XmNscrollHorizontal, wantHorizScrolling ? True : False);
         XtSetArg (args[1], XmNwordWrap, wantWordWrap ? True : False);
-        
-        m_mainWidget = (WXWidget) XmCreateScrolledText (parentWidget, (char*) (const char*) name, args, 2);
-        
+
+        m_mainWidget = (WXWidget) XmCreateScrolledText(parentWidget,
+                                                       (char*)name.c_str(),
+                                                       args, 2);
+
         XtVaSetValues ((Widget) m_mainWidget,
-            XmNeditable, ((style & wxTE_READONLY) ? False : True),
-            XmNeditMode, XmMULTI_LINE_EDIT,
-            NULL);
+                        XmNeditable, ((style & wxTE_READONLY) ? False : True),
+                        XmNeditMode, XmMULTI_LINE_EDIT,
+                        NULL);
         XtManageChild ((Widget) m_mainWidget);
     }
     else
     {
-        m_mainWidget = (WXWidget) XtVaCreateManagedWidget ((char*) (const char*) name,
-            xmTextWidgetClass, parentWidget,
-            NULL);
-        
+        m_mainWidget = (WXWidget)XtVaCreateManagedWidget
+                                 (
+                                  (char*)name.c_str(),
+                                  xmTextWidgetClass,
+                                  parentWidget,
+                                  NULL
+                                 );
+
+        XtVaSetValues ((Widget) m_mainWidget,
+                        XmNeditable, ((style & wxTE_READONLY) ? False : True),
+                        NULL);
+
         // TODO: Is this relevant? What does it do?
         int noCols = 2;
         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
             noCols = value.Length();
-        XtVaSetValues ((Widget) m_mainWidget,
-            XmNcolumns, noCols,
-            NULL);
+        XtVaSetValues((Widget) m_mainWidget,
+                      XmNcolumns, noCols,
+                      NULL);
+    }
+
+    // remove border if asked for
+    if ( style & wxNO_BORDER )
+    {
+        XtVaSetValues((Widget)m_mainWidget,
+                      XmNshadowThickness, 0,
+                      NULL);
+    }
+
+    if ( !!value )
+    {
+#if 0
+        // don't do this because it is just linking the text to a source
+        // string which is unsafe. MB
+        //
+        XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
+#else
+        // do this instead... MB
+        //
+        XtVaSetValues( (Widget) m_mainWidget,
+                       XmNvalue, (char *)value.c_str(),
+                       NULL);
+#endif
     }
     
-    if (!value.IsNull())
-        XmTextSetString ((Widget) m_mainWidget, (char*) (const char*) value);
-    
+    // install callbacks
     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
-    
+
     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
-    
+
     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
-    
+
     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
-    
+
     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
-    
-    m_windowFont = parent->GetFont();
+
+    // font
+    m_font = parent->GetFont();
     ChangeFont(FALSE);
-    
+
     SetCanAddEventHandler(TRUE);
     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, size.x, size.y);
-    
+
     ChangeBackgroundColour();
-    
+
     return TRUE;
 }
 
@@ -162,33 +225,53 @@ WXWidget wxTextCtrl::GetTopWidget() const
 
 wxString wxTextCtrl::GetValue() const
 {
+    wxString str; // result
+
     if (m_windowStyle & wxTE_PASSWORD)
-        return m_value;
+    {
+        // the value is stored always in m_value because it can't be retrieved
+        // from the text control
+        str = m_value;
+    }
     else
     {
+        // just get the string from Motif
         char *s = XmTextGetString ((Widget) m_mainWidget);
-        if (s)
+        if ( s )
         {
-            wxString str(s);
+            str = s;
             XtFree (s);
-            return str;
         }
-        else
+        //else: return empty string
+
+        if ( m_tempCallbackStruct )
         {
-            return wxEmptyString;
+            // the string in the control isn't yet updated, can't use it as is
+            MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
+                                   m_tempCallbackStruct);
         }
     }
+
+    return str;
 }
 
 void wxTextCtrl::SetValue(const wxString& value)
 {
-    // This assert is wrong -- means that you can't set an empty
-    // string (IsNull == IsEmpty).
-    //    wxASSERT_MSG( (!value.IsNull()), "Must not pass a null string to wxTextCtrl::SetValue." ) ;
     m_inSetValue = TRUE;
-    
-    XmTextSetString ((Widget) m_mainWidget, (char*) (const char*) value);
-    
+
+#if 0
+    // don't do this because it is just linking the text to a source
+    // string which is unsafe. MB
+    //
+    XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
+#else
+    // do this instead... MB
+    //
+    XtVaSetValues( (Widget) m_mainWidget,
+                   XmNvalue, (char *)value.c_str(),
+                   NULL);
+#endif
+
     m_inSetValue = FALSE;
 }
 
@@ -208,6 +291,67 @@ void wxTextCtrl::Paste()
     XmTextPaste((Widget) m_mainWidget);
 }
 
+bool wxTextCtrl::CanCopy() const
+{
+    // Can copy if there's a selection
+    long from, to;
+    GetSelection(& from, & to);
+    return (from != to) ;
+}
+
+bool wxTextCtrl::CanCut() const
+{
+    // Can cut if there's a selection
+    long from, to;
+    GetSelection(& from, & to);
+    return (from != to) && (IsEditable());
+}
+
+bool wxTextCtrl::CanPaste() const
+{
+    return IsEditable() ;
+}
+
+// Undo/redo
+void wxTextCtrl::Undo()
+{
+    // Not possible in Motif
+}
+
+void wxTextCtrl::Redo()
+{
+    // Not possible in Motif
+}
+
+bool wxTextCtrl::CanUndo() const
+{
+    // No Undo in Motif
+    return FALSE;
+}
+
+bool wxTextCtrl::CanRedo() const
+{
+    // No Redo in Motif
+    return FALSE;
+}
+
+// If the return values from and to are the same, there is no
+// selection.
+void wxTextCtrl::GetSelection(long* from, long* to) const
+{
+    XmTextPosition left, right;
+
+    XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
+
+    *from = (long) left;
+    *to = (long) right;
+}
+
+bool wxTextCtrl::IsEditable() const
+{
+    return (XmTextGetEditable((Widget) m_mainWidget) != 0);
+}
+
 void wxTextCtrl::SetEditable(bool editable)
 {
     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
@@ -243,28 +387,28 @@ void wxTextCtrl::Replace(long from, long to, const wxString& value)
 void wxTextCtrl::Remove(long from, long to)
 {
     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
-		      (Time) 0);
+                      (Time) 0);
     XmTextRemove ((Widget) m_mainWidget);
 }
 
 void wxTextCtrl::SetSelection(long from, long to)
 {
     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
-		      (Time) 0);
+                      (Time) 0);
 }
 
 bool wxTextCtrl::LoadFile(const wxString& file)
 {
     if (!wxFileExists(file))
         return FALSE;
-    
+
     m_fileName = file;
-    
+
     Clear();
-    
+
     Widget textWidget = (Widget) m_mainWidget;
-    FILE *fp;
-    
+    FILE *fp = 0;
+
     struct stat statb;
     if ((stat ((char*) (const char*) file, &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
         !(fp = fopen ((char*) (const char*) file, "r")))
@@ -284,7 +428,7 @@ bool wxTextCtrl::LoadFile(const wxString& file)
         {
         }
         fclose (fp);
-        
+
         text[len] = 0;
         XmTextSetString (textWidget, text);
         //      m_textPosition = len;
@@ -304,10 +448,10 @@ bool wxTextCtrl::SaveFile(const wxString& file)
     if (theFile == "")
         return FALSE;
     m_fileName = theFile;
-    
+
     Widget textWidget = (Widget) m_mainWidget;
     FILE *fp;
-    
+
     if (!(fp = fopen ((char*) (const char*) theFile, "w")))
     {
         return FALSE;
@@ -316,7 +460,7 @@ bool wxTextCtrl::SaveFile(const wxString& file)
     {
         char *text = XmTextGetString (textWidget);
         long len = XmTextGetLastPosition (textWidget);
-        
+
         if (fwrite (text, sizeof (char), len, fp) != (size_t) len)
         {
             // Did not write whole file
@@ -324,7 +468,7 @@ bool wxTextCtrl::SaveFile(const wxString& file)
         // Make sure newline terminates the file
         if (text[len - 1] != '\n')
             fputc ('\n', fp);
-        
+
         fclose (fp);
         XtFree (text);
         m_modified = FALSE;
@@ -366,7 +510,6 @@ bool wxTextCtrl::IsModified() const
 // Makes 'unmodified'
 void wxTextCtrl::DiscardEdits()
 {
-    XmTextSetString ((Widget) m_mainWidget, "");
     m_modified = FALSE;
 }
 
@@ -394,7 +537,7 @@ int wxTextCtrl::GetNumberOfLines() const
             else
                 i++;
         }
-        
+
         XtFree (s);
         return currentLine;
     }
@@ -412,14 +555,19 @@ long wxTextCtrl::XYToPosition(long x, long y) const
     /* Now a little workaround: */
     long r=0;
     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
-    return r+x; 
+    return r+x;
 }
 
-void wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
+bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 {
     Position xx, yy;
     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
-    *x = xx; *y = yy;
+    if ( x )
+        *x = xx;
+    if ( y )
+        *y = yy;
+
+    return TRUE;
 }
 
 void wxTextCtrl::ShowPosition(long pos)
@@ -437,7 +585,7 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
 {
     // HIDEOUSLY inefficient, but we have no choice.
     char *s = XmTextGetString ((Widget) m_mainWidget);
-    
+
     if (s)
     {
         wxString buf("");
@@ -450,7 +598,7 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
             int j;
             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
                 buf += s[i];
-            
+
             XtFree(s);
             return buf;
     }
@@ -477,168 +625,13 @@ void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
     }
 }
 
-// The streambuf code was partly taken from chapter 3 by Jerry Schwarz of
-// AT&T's "C++ Lanuage System Release 3.0 Library Manual" - Stein Somers
-
-//=========================================================================
-// Called then the buffer is full (gcc 2.6.3) 
-// or when "endl" is output (Borland 4.5)
-//=========================================================================
-// Class declaration using multiple inheritance doesn't work properly for
-// Borland. See note in wb_text.h.
-#ifndef NO_TEXT_WINDOW_STREAM
-int wxTextCtrl::overflow(int c)
-{
-    // Make sure there is a holding area
-    if ( allocate()==EOF )
-    {
-        wxError("Streambuf allocation failed","Internal error");
-        return EOF;
-    }
-    
-    // Verify that there are no characters in get area
-    if ( gptr() && gptr() < egptr() )
-    {
-        wxError("wxTextCtrl::overflow: Who's trespassing my get area?","Internal error");
-        return EOF;
-    }
-    
-    // Reset get area
-    setg(0,0,0);
-    
-    // Make sure there is a put area
-    if ( ! pptr() )
-    {
-        /* This doesn't seem to be fatal so comment out error message */
-        //    wxError("Put area not opened","Internal error");
-        setp( base(), base() );
-    }
-    
-    // Determine how many characters have been inserted but no consumed
-    int plen = pptr() - pbase();
-    
-    // Now Jerry relies on the fact that the buffer is at least 2 chars
-    // long, but the holding area "may be as small as 1" ???
-    // And we need an additional \0, so let's keep this inefficient but
-    // safe copy.
-    
-    // If c!=EOF, it is a character that must also be comsumed
-    int xtra = c==EOF? 0 : 1;
-    
-    // Write temporary C-string to wxTextWindow
-    {
-        char *txt = new char[plen+xtra+1];
-        memcpy(txt, pbase(), plen);
-        txt[plen] = (char)c;     // append c
-        txt[plen+xtra] = '\0';   // append '\0' or overwrite c
-        // If the put area already contained \0, output will be truncated there
-        WriteText(txt);
-        delete[] txt;
-    }
-    
-    // Reset put area
-    setp(pbase(), epptr());
-    
-#if defined(__WATCOMC__)
-    return __NOT_EOF;
-#elif defined(zapeof)     // HP-UX (all cfront based?)
-    return zapeof(c);
-#else
-    return c!=EOF ? c : 0;  // this should make everybody happy
-#endif
-}
-
-//=========================================================================
-// called then "endl" is output (gcc) or then explicit sync is done (Borland)
-//=========================================================================
-int wxTextCtrl::sync()
-{
-    // Verify that there are no characters in get area
-    if ( gptr() && gptr() < egptr() )
-    {
-        wxError("Who's trespassing my get area?","Internal error");
-        return EOF;
-    }
-    
-    if ( pptr() && pptr() > pbase() ) return overflow(EOF);
-    
-    return 0;
-    /* OLD CODE
-    int len = pptr() - pbase();
-    char *txt = new char[len+1];
-    strncpy(txt, pbase(), len);
-    txt[len] = '\0';
-    (*this) << txt;
-    setp(pbase(), epptr());
-    delete[] txt;
-    return 0;
-    */
-}
-
-//=========================================================================
-// Should not be called by a "ostream". Used by a "istream"
-//=========================================================================
-int wxTextCtrl::underflow()
-{
-    return EOF;
-}
-#endif
-
-wxTextCtrl& wxTextCtrl::operator<<(const wxString& s)
-{
-    AppendText(s);
-    return *this;
-}
-
-wxTextCtrl& wxTextCtrl::operator<<(float f)
-{
-    wxString str;
-    str.Printf("%.2f", f);
-    AppendText(str);
-    return *this;
-}
-
-wxTextCtrl& wxTextCtrl::operator<<(double d)
-{
-    wxString str;
-    str.Printf("%.2f", d);
-    AppendText(str);
-    return *this;
-}
-
-wxTextCtrl& wxTextCtrl::operator<<(int i)
-{
-    wxString str;
-    str.Printf("%d", i);
-    AppendText(str);
-    return *this;
-}
-
-wxTextCtrl& wxTextCtrl::operator<<(long i)
-{
-    wxString str;
-    str.Printf("%ld", i);
-    AppendText(str);
-    return *this;
-}
-
-wxTextCtrl& wxTextCtrl::operator<<(const char c)
-{
-    char buf[2];
-    
-    buf[0] = c;
-    buf[1] = 0;
-    AppendText(buf);
-    return *this;
-}
-
 void wxTextCtrl::OnChar(wxKeyEvent& event)
 {
     // Indicates that we should generate a normal command, because
     // we're letting default behaviour happen (otherwise it's vetoed
     // by virtue of overriding OnChar)
     m_processedDefault = TRUE;
-    
+
     if (m_tempCallbackStruct)
     {
         XmTextVerifyCallbackStruct *textStruct =
@@ -659,7 +652,7 @@ void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 void wxTextCtrl::ChangeBackgroundColour()
 {
     wxWindow::ChangeBackgroundColour();
-    
+
     /* TODO: should scrollbars be affected? Should probably have separate
     * function to change them (by default, taken from wxSystemSettings)
     */
@@ -667,7 +660,7 @@ void wxTextCtrl::ChangeBackgroundColour()
     {
         Widget parent = XtParent ((Widget) m_mainWidget);
         Widget hsb, vsb;
-        
+
         XtVaGetValues (parent,
             XmNhorizontalScrollBar, &hsb,
             XmNverticalScrollBar, &vsb,
@@ -677,7 +670,7 @@ void wxTextCtrl::ChangeBackgroundColour()
             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
         if (vsb)
             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
-        
+
         DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
     }
 }
@@ -685,17 +678,17 @@ void wxTextCtrl::ChangeBackgroundColour()
 void wxTextCtrl::ChangeForegroundColour()
 {
     wxWindow::ChangeForegroundColour();
-    
+
     if (m_windowStyle & wxTE_MULTILINE)
     {
         Widget parent = XtParent ((Widget) m_mainWidget);
         Widget hsb, vsb;
-        
+
         XtVaGetValues (parent,
             XmNhorizontalScrollBar, &hsb,
             XmNverticalScrollBar, &vsb,
             NULL);
-        
+
             /* TODO: should scrollbars be affected? Should probably have separate
             * function to change them (by default, taken from wxSystemSettings)
             if (hsb)
@@ -707,174 +700,173 @@ void wxTextCtrl::ChangeForegroundColour()
     }
 }
 
-static void wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer ptr)
+void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
+{
+    // we're in process of updating the text control
+    m_tempCallbackStruct = wxcbs;
+
+    XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
+
+    wxKeyEvent event (wxEVT_CHAR);
+    event.SetId(GetId());
+    event.m_keyCode = keycode;
+    event.SetEventObject(this);
+
+    // Only if wxTextCtrl::OnChar is called will this be set to True (and
+    // the character passed through)
+    cbs->doit = False;
+
+    GetEventHandler()->ProcessEvent(event);
+
+    if ( !InSetValue() && m_processedDefault )
+    {
+        // Can generate a command
+        wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
+        commandEvent.SetEventObject(this);
+        ProcessCommand(commandEvent);
+    }
+
+    // do it after the (user) event handlers processed the events because
+    // otherwise GetValue() would return incorrect (not yet updated value)
+    m_tempCallbackStruct = NULL;
+}
+
+// ----------------------------------------------------------------------------
+// helpers and Motif callbacks
+// ----------------------------------------------------------------------------
+
+static void MergeChangesIntoString(wxString& value,
+                                   XmTextVerifyCallbackStruct *cbs)
+{
+    /* _sm_
+     * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
+     * every event as a replace event.  cbs->text->ptr gives the replacement
+     * text, cbs->startPos gives the index of the first char affected by the
+     * replace, and cbs->endPos gives the index one more than the last char
+     * affected by the replace (startPos == endPos implies an empty range).
+     * Hence, a deletion is represented by replacing all input text with a
+     * blank string ("", *not* NULL!).  A simple insertion that does not
+     * overwrite any text has startPos == endPos.
+     */
+
+    if ( !value )
+    {
+        // easy case: the ol value was empty
+        value = cbs->text->ptr;
+    }
+    else
+    {
+        // merge the changes into the value
+        const char * const passwd = value;
+        int len = value.length();
+
+        len += strlen(cbs->text->ptr) + 1;     // + new text (if any) + NUL
+        len -= cbs->endPos - cbs->startPos;    // - text from affected region.
+
+        char * newS = new char [len];
+        char * dest = newS,
+             * insert = cbs->text->ptr;
+
+        // Copy (old) text from passwd, up to the start posn of the change.
+        int i;
+        const char * p = passwd;
+        for (i = 0; i < cbs->startPos; ++i)
+            *dest++ = *p++;
+
+        // Copy the text to be inserted).
+        while (*insert)
+            *dest++ = *insert++;
+
+        // Finally, copy into newS any remaining text from passwd[endPos] on.
+        for (p = passwd + cbs->endPos; *p; )
+            *dest++ = *p++;
+        *dest = 0;
+
+        value = newS;
+
+        delete[] newS;
+    }
+}
+
+static void
+wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 {
     if (!wxGetWindowFromTable(w))
         // Widget has been deleted!
         return;
-    
+
     wxTextCtrl *tw = (wxTextCtrl *) clientData;
     tw->SetModified(TRUE);
 }
 
-static void 
-wxTextWindowModifyProc (Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
+static void
+wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 {
     wxTextCtrl *tw = (wxTextCtrl *) clientData;
     tw->m_processedDefault = FALSE;
-    
-    // First, do some stuff if it's a password control.
-    // (What does this do exactly?)
-    
-    if (tw->GetWindowStyleFlag() & wxTE_PASSWORD)
+
+    // First, do some stuff if it's a password control: in this case, we need
+    // to store the string inside the class because GetValue() can't retrieve
+    // it from the text ctrl. We do *not* do it in other circumstances because
+    // it would double the amount of memory needed.
+
+    if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
     {
-    /* _sm_
-    * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
-    * every event as a replace event.  cbs->text->ptr gives the replacement
-    * text, cbs->startPos gives the index of the first char affected by the
-    * replace, and cbs->endPos gives the index one more than the last char
-    * affected by the replace (startPos == endPos implies an empty range).
-    * Hence, a deletion is represented by replacing all input text with a
-    * blank string ("", *not* NULL!).  A simple insertion that does not
-    * overwrite any text has startPos == endPos.
-        */
-        
-        if (tw->m_value.IsNull())
-        {
-            tw->m_value = cbs->text->ptr;
-        }
-        else
-        {
-            char * passwd = (char*) (const char*) tw->m_value;  // Set up a more convenient alias.
-            
-            int len = passwd ? strlen(passwd) : 0; // Enough room for old text
-            len += strlen(cbs->text->ptr) + 1;     // + new text (if any) + NUL
-            len -= cbs->endPos - cbs->startPos;    // - text from affected region.
-            
-            char * newS = new char [len];
-            char * p = passwd, * dest = newS, * insert = cbs->text->ptr;
-            
-            // Copy (old) text from passwd, up to the start posn of the change.
-            int i;
-            for (i = 0; i < cbs->startPos; ++i)
-                *dest++ = *p++;
-            
-            // Copy the text to be inserted).
-            while (*insert)
-                *dest++ = *insert++;
-            
-            // Finally, copy into newS any remaining text from passwd[endPos] on.
-            for (p = passwd + cbs->endPos; *p; )
-                *dest++ = *p++;
-            *dest = 0;
-            
-            tw->m_value = newS;
-            
-            delete[] newS;
-        }
-        
-        if (cbs->text->length>0)
+        MergeChangesIntoString(tw->m_value, cbs);
+
+        if ( cbs->text->length > 0 )
         {
             int i;
             for (i = 0; i < cbs->text->length; ++i)
                 cbs->text->ptr[i] = '*';
-            cbs->text->ptr[i] = 0;
+            cbs->text->ptr[i] = '\0';
         }
     }
-    
-    // If we're already within an OnChar, return: probably
-    // a programmatic insertion.
+
+    // If we're already within an OnChar, return: probably a programmatic
+    // insertion.
     if (tw->m_tempCallbackStruct)
         return;
-    
+
     // Check for a backspace
     if (cbs->startPos == (cbs->currInsert - 1))
     {
-        tw->m_tempCallbackStruct = (void*) cbs;
-        
-        wxKeyEvent event (wxEVT_CHAR);
-        event.SetId(tw->GetId());
-        event.m_keyCode = WXK_DELETE;
-        event.SetEventObject(tw);
-        
-        // Only if wxTextCtrl::OnChar is called
-        // will this be set to True (and the character
-        // passed through)
-        cbs->doit = False;
-        
-        tw->GetEventHandler()->ProcessEvent(event);
-        
-        tw->m_tempCallbackStruct = NULL;
-        
-        if (tw->InSetValue())
-            return;
-        
-        if (tw->m_processedDefault)
-        {
-            // Can generate a command
-            wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, tw->GetId());
-            commandEvent.SetEventObject(tw);
-            tw->ProcessCommand(commandEvent);
-        }
-        
+        tw->DoSendEvents((void *)cbs, WXK_DELETE);
+
         return;
     }
-    
-    // Pasting operation: let it through without
-    // calling OnChar
+
+    // Pasting operation: let it through without calling OnChar
     if (cbs->text->length > 1)
         return;
-    
+
     // Something other than text
     if (cbs->text->ptr == NULL)
         return;
-    
-    tw->m_tempCallbackStruct = (void*) cbs;
-    
-    wxKeyEvent event (wxEVT_CHAR);
-    event.SetId(tw->GetId());
-    event.SetEventObject(tw);
-    event.m_keyCode = (cbs->text->ptr[0] == 10 ? 13 : cbs->text->ptr[0]);
-    
-    // Only if wxTextCtrl::OnChar is called
-    // will this be set to True (and the character
-    // passed through)
-    cbs->doit = False;
-    
-    tw->GetEventHandler()->ProcessEvent(event);
-    
-    tw->m_tempCallbackStruct = NULL;
-    
-    if (tw->InSetValue())
-        return;
-    
-    if (tw->m_processedDefault)
-    {
-        // Can generate a command
-        wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, tw->GetId());
-        commandEvent.SetEventObject(tw);
-        tw->ProcessCommand(commandEvent);
-    }
+
+    // normal key press
+    char ch = cbs->text->ptr[0];
+    tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 }
 
-static void 
-wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs)
+static void
+wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 {
     if (!wxGetWindowFromTable(w))
         return;
-    
+
     wxTextCtrl *tw = (wxTextCtrl *) clientData;
     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
     event.SetEventObject(tw);
     tw->GetEventHandler()->ProcessEvent(event);
 }
 
-static void 
-wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs)
+static void
+wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 {
     if (!wxGetWindowFromTable(w))
         return;
-    
+
     wxTextCtrl *tw = (wxTextCtrl *) clientData;
     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
     event.SetEventObject(tw);
@@ -882,27 +874,68 @@ wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *
 }
 
 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
-                                     XmAnyCallbackStruct *ptr)
+                                     XmAnyCallbackStruct *WXUNUSED(ptr))
 {
     if (!wxGetWindowFromTable(w))
         return;
-    
+
     wxTextCtrl *tw = (wxTextCtrl *) clientData;
-    /*
-    case XmCR_ACTIVATE:
-    type_event = wxEVENT_TYPE_TEXT_ENTER_COMMAND ;
-    break;
-    default:
-    type_event = wxEVENT_TYPE_TEXT_COMMAND ;
-    break;
-    }
-    */
-    
+
     if (tw->InSetValue())
         return;
-    
+
     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
     event.SetId(tw->GetId());
     event.SetEventObject(tw);
     tw->ProcessCommand(event);
 }
+
+void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
+{
+    Cut();
+}
+
+void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
+{
+    Copy();
+}
+
+void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
+{
+    Paste();
+}
+
+void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
+{
+    Undo();
+}
+
+void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
+{
+    Redo();
+}
+
+void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
+{
+    event.Enable( CanCut() );
+}
+
+void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
+{
+    event.Enable( CanCopy() );
+}
+
+void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
+{
+    event.Enable( CanPaste() );
+}
+
+void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
+{
+    event.Enable( CanUndo() );
+}
+
+void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
+{
+    event.Enable( CanRedo() );
+}