X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4bb6408c2631988fab9925014c6619358bf867de..fd71308fc89eac2dd212b715eba68a993fa78f53:/src/motif/listbox.cpp

diff --git a/src/motif/listbox.cpp b/src/motif/listbox.cpp
index 9352c32bc2..2dffe82cb1 100644
--- a/src/motif/listbox.cpp
+++ b/src/motif/listbox.cpp
@@ -17,20 +17,30 @@
 #include "wx/settings.h"
 #include "wx/dynarray.h"
 #include "wx/log.h"
+#include "wx/utils.h"
+
+#include <Xm/List.h>
+#include "wx/motif/private.h"
 
 #if !USE_SHARED_LIBRARY
   IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
 #endif
 
+void wxListBoxCallback (Widget w, XtPointer clientData,
+           XmListCallbackStruct * cbs);
+
+void wxListBoxDefaultActionProc (Widget list_w, XtPointer client_data, XmListCallbackStruct * cbs);
+
 // ============================================================================
 // list box control implementation
 // ============================================================================
 
 // Listbox item
-wxListBox::wxListBox()
+wxListBox::wxListBox(): m_clientDataList(wxKEY_INTEGER)
 {
-  m_noItems = 0;
-  m_selected = 0;
+    m_noItems = 0;
+    m_selected = 0;
+    m_inSetValue = FALSE;
 }
 
 bool wxListBox::Create(wxWindow *parent, wxWindowID id,
@@ -41,22 +51,69 @@ bool wxListBox::Create(wxWindow *parent, wxWindowID id,
                        const wxValidator& validator,
                        const wxString& name)
 {
-  m_noItems = n;
-  m_selected = 0;
+    m_inSetValue = FALSE;
+    m_windowStyle = style;
+    m_noItems = n;
+    m_selected = 0;
+
+    SetName(name);
+    SetValidator(validator);
+
+    if (parent) parent->AddChild(this);
+
+    m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
+
+    Widget parentWidget = (Widget) parent->GetClientWidget();
+
+    Arg args[3];
+    int count;
+    XtSetArg (args[0], XmNlistSizePolicy, XmCONSTANT);
+    if (m_windowStyle & wxLB_MULTIPLE)
+        XtSetArg (args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+    else if (m_windowStyle & wxLB_EXTENDED)
+        XtSetArg (args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+    else
+        XtSetArg (args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+    if (m_windowStyle & wxLB_ALWAYS_SB)
+    {
+        XtSetArg (args[2], XmNscrollBarDisplayPolicy, XmSTATIC);
+        count = 3;
+    }
+    else
+        count = 2;
 
-  SetName(name);
-  SetValidator(validator);
+    Widget listWidget = XmCreateScrolledList (parentWidget, (char*) (const char*) name, args, count);
 
-  if (parent) parent->AddChild(this);
+    m_mainWidget = (WXWidget) listWidget;
 
-  wxSystemSettings settings;
-  SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
+    XtManageChild (listWidget);
 
-  m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
+    long width = size.x;
+    long height = size.y;
+    if (width == -1)
+        width = 150;
+    if (height == -1)
+        height = 80;
 
-  // TODO create listbox
+    XtAddCallback (listWidget, XmNbrowseSelectionCallback, (XtCallbackProc) wxListBoxCallback,
+           (XtPointer) this);
+    XtAddCallback (listWidget, XmNextendedSelectionCallback, (XtCallbackProc) wxListBoxCallback,
+           (XtPointer) this);
+    XtAddCallback (listWidget, XmNmultipleSelectionCallback, (XtCallbackProc) wxListBoxCallback,
+           (XtPointer) this);
 
-  return FALSE;
+    XtAddCallback (listWidget, XmNdefaultActionCallback, (XtCallbackProc) wxListBoxDefaultActionProc,
+         (XtPointer) this);
+
+    AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, width, height);
+
+    wxSystemSettings settings;
+    SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
+
+    SetFont(* parent->GetFont());
+    ChangeColour(m_mainWidget);
+
+    return TRUE;
 }
 
 wxListBox::~wxListBox()
@@ -65,171 +122,608 @@ wxListBox::~wxListBox()
 
 void wxListBox::SetFirstItem(int N)
 {
-    // TODO
+  int count, length;
+
+  if (N < 0)
+    return;
+  XtVaGetValues ((Widget) m_mainWidget,
+         XmNvisibleItemCount, &count,
+         XmNitemCount, &length,
+         NULL);
+  if ((N + count) >= length)
+    N = length - count;
+  XmListSetPos ((Widget) m_mainWidget, N + 1);
 }
 
 void wxListBox::SetFirstItem(const wxString& s)
 {
-    // TODO
+  int N = FindString (s);
+
+  if (N >= 0)
+    SetFirstItem (N);
 }
 
 void wxListBox::Delete(int N)
 {
+  int width1, height1;
+  int width2, height2;
+  Widget listBox = (Widget) m_mainWidget;
+  GetSize (&width1, &height1);
+
+  bool managed = XtIsManaged(listBox);
+
+  if (managed)
+    XtUnmanageChild (listBox);
+
+  XmListDeletePos (listBox, N + 1);
+
+  if (managed)
+    XtManageChild (listBox);
+
+  GetSize (&width2, &height2);
+  // Correct for randomly resized listbox - bad boy, Motif!
+  if (width1 != width2 || height1 != height2)
+    SetSize (-1, -1, width1, height1);
+
+  // (JDH) need to add code here to take care of clientDataList
+  wxNode *node = m_clientDataList.Find((long)N);  // get item from list
+  if (node) m_clientDataList.DeleteNode(node);    // if existed then delete from list
+  node = m_clientDataList.First();                // we now have to adjust all keys that
+  while (node)                                  // are >=N+1
+   { if (node->key.integer >= (long)(N+1))      // very ugly C++ wise but no other way 
+       node->key.integer--;                     // to look at or change key value
+     node = node->Next();
+   }
+
   m_noItems --;
-    // TODO
 }
 
 void wxListBox::Append(const wxString& item)
 {
-  m_noItems ++;
+  int width1, height1;
+  int width2, height2;
+
+  Widget listBox = (Widget) m_mainWidget;
+  GetSize (&width1, &height1);
+
+  bool managed = XtIsManaged(listBox);
+
+  if (managed)
+    XtUnmanageChild (listBox);
+  int n;
+  XtVaGetValues (listBox, XmNitemCount, &n, NULL);
+  XmString text = XmStringCreateSimple ((char*) (const char*) item);
+//  XmListAddItem(listBox, text, n + 1);
+  XmListAddItemUnselected (listBox, text, 0);
+  XmStringFree (text);
+
+  // It seems that if the list is cleared, we must re-ask for
+  // selection policy!!
+  Arg args[3];
+  XtSetArg (args[0], XmNlistSizePolicy, XmCONSTANT);
+  if (m_windowStyle & wxLB_MULTIPLE)
+    XtSetArg (args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+  else if (m_windowStyle & wxLB_EXTENDED)
+    XtSetArg (args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+  else
+    XtSetArg (args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+  XtSetValues (listBox, args, 2);
+
+  if (managed)
+    XtManageChild (listBox);
 
-  // TODO
+  GetSize (&width2, &height2);
+  // Correct for randomly resized listbox - bad boy, Motif!
+  if (width1 != width2 || height1 != height2)
+    SetSize (-1, -1, width1, height1);
+  m_noItems ++;
 }
 
-void wxListBox::Append(const wxString& item, char *Client_data)
+void wxListBox::Append(const wxString& item, char *clientData)
 {
-  m_noItems ++;
+  int width1, height1;
+  int width2, height2;
+
+  Widget listBox = (Widget) m_mainWidget;
+
+  GetSize (&width1, &height1);
+  Bool managed = XtIsManaged(listBox);
+
+  if (managed)
+    XtUnmanageChild (listBox);
+
+  int n;
+  XtVaGetValues (listBox, XmNitemCount, &n, NULL);
+  XmString text = XmStringCreateSimple ((char*) (const char*) item);
+//  XmListAddItem(listBox, text, n + 1);
+  XmListAddItemUnselected (listBox, text, 0);
+  XmStringFree (text);
+
+  // It seems that if the list is cleared, we must re-ask for
+  // selection policy!!
+  Arg args[3];
+  XtSetArg (args[0], XmNlistSizePolicy, XmCONSTANT);
+  if (m_windowStyle & wxLB_MULTIPLE)
+    XtSetArg (args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+  else if (m_windowStyle & wxLB_EXTENDED)
+    XtSetArg (args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+  else
+    XtSetArg (args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+  XtSetValues (listBox, args, 2);
+
+  m_clientDataList.Append ((long) n, (wxObject *) clientData);
+
+  if (managed)
+    XtManageChild (listBox);
+
+  GetSize (&width2, &height2);
+
+  // Correct for randomly resized listbox - bad boy, Motif!
+  if (width1 != width2 || height1 != height2)
+    SetSize (-1, -1, width1, height1);
 
-  // TODO
+  m_noItems ++;
 }
 
 void wxListBox::Set(int n, const wxString *choices, char** clientData)
 {
-  m_noItems = n;
+  m_clientDataList.Clear();
+  int width1, height1;
+  int width2, height2;
+
+  Widget listBox = (Widget) m_mainWidget;
+  GetSize (&width1, &height1);
+
+  bool managed = XtIsManaged(listBox);
+
+  if (managed)
+    XtUnmanageChild (listBox);
+/***
+  for (int i=0; i<n; i++)
+  {
+    XmString text = XmStringCreateSimple(choices[i]);
+    XmListAddItemUnselected(listBox, text, 0);
+    XmStringFree(text);
+  }
+***/
+  XmString *text = new XmString[n];
+  int i;
+  for (i = 0; i < n; i++)
+    text[i] = XmStringCreateSimple ((char*) (const char*) choices[i]);
+
+  if ( clientData )
+    for (i = 0; i < n; i++)
+      m_clientDataList.Append ((long) i, (wxObject *) clientData[i]);
+
+  XmListAddItems (listBox, text, n, 0);
+  for (i = 0; i < n; i++)
+    XmStringFree (text[i]);
+  delete[]text;
+
+  // It seems that if the list is cleared, we must re-ask for
+  // selection policy!!
+  Arg args[3];
+  XtSetArg (args[0], XmNlistSizePolicy, XmCONSTANT);
+  if (m_windowStyle & wxLB_MULTIPLE)
+    XtSetArg (args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+  else if (m_windowStyle & wxLB_EXTENDED)
+    XtSetArg (args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+  else
+    XtSetArg (args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+  XtSetValues (listBox, args, 2);
 
-  // TODO
+  if (managed)
+    XtManageChild (listBox);
+
+  GetSize (&width2, &height2);
+  // Correct for randomly resized listbox - bad boy, Motif!
+  if (width1 != width2 || height1 != height2)
+    SetSize (-1, -1, width1, height1);
+
+  m_noItems = n;
 }
 
 int wxListBox::FindString(const wxString& s) const
 {
-    // TODO
+  XmString str = XmStringCreateSimple ((char*) (const char*) s);
+  int *positions = NULL;
+  int no_positions = 0;
+  bool success = XmListGetMatchPos ((Widget) m_mainWidget, str, &positions, &no_positions);
+  XmStringFree (str);
+  if (success)
+    {
+      int pos = positions[0];
+      if (positions)
+    XtFree ((char *) positions);
+      return pos - 1;
+    }
+  else
     return -1;
 }
 
 void wxListBox::Clear()
 {
+  if (m_noItems <= 0)
+    return;
+
+  int width1, height1;
+  int width2, height2;
+
+  Widget listBox = (Widget) m_mainWidget;
+  GetSize (&width1, &height1);
+
+  XmListDeleteAllItems (listBox);
+  m_clientDataList.Clear ();
+  GetSize (&width2, &height2);
+
+  // Correct for randomly resized listbox - bad boy, Motif!
+  if (width1 != width2 || height1 != height2)
+    SetSize (-1, -1, width1, height1);
+
   m_noItems = 0;
-  // TODO
 }
 
 void wxListBox::SetSelection(int N, bool select)
 {
-    // TODO
+  m_inSetValue = TRUE;
+  if (select)
+    {
+/*
+      if (m_windowStyle & wxLB_MULTIPLE)
+    {
+      int *selections = NULL;
+      int n = GetSelections (&selections);
+
+      // This hack is supposed to work, to make it possible to select more
+      // than one item, but it DOESN'T under Motif 1.1.
+
+      XtVaSetValues ((Widget) m_mainWidget, XmNselectionPolicy, XmMULTIPLE_SELECT, NULL);
+
+      int i;
+      for (i = 0; i < n; i++)
+        XmListSelectPos ((Widget) m_mainWidget, selections[i] + 1, FALSE);
+
+      XmListSelectPos ((Widget) m_mainWidget, N + 1, FALSE);
+
+      XtVaSetValues ((Widget) m_mainWidget, XmNselectionPolicy, XmEXTENDED_SELECT, NULL);
+    }
+      else
+*/
+    XmListSelectPos ((Widget) m_mainWidget, N + 1, FALSE);
+
+    }
+  else
+    XmListDeselectPos ((Widget) m_mainWidget, N + 1);
+
+  m_inSetValue = FALSE;
 }
 
 bool wxListBox::Selected(int N) const
 {
-    // TODO
+  // In Motif, no simple way to determine if the item is selected.
+  wxArrayInt theSelections;
+  int count = GetSelections (theSelections);
+  if (count == 0)
     return FALSE;
+  else
+  {
+    int j;
+    for (j = 0; j < count; j++)
+      if (theSelections[j] == N)
+    return TRUE;
+  }
+  return FALSE;
 }
 
 void wxListBox::Deselect(int N)
 {
-    // TODO
+    XmListDeselectPos ((Widget) m_mainWidget, N + 1);
 }
 
 char *wxListBox::GetClientData(int N) const
 {
-    // TODO
-    return (char *)NULL;
+    wxNode *node = m_clientDataList.Find ((long) N);
+    if (node)
+        return (char *) node->Data ();
+    else
+        return NULL;
 }
 
 void wxListBox::SetClientData(int N, char *Client_data)
 {
-    // TODO
+    wxNode *node = m_clientDataList.Find ((long) N);
+    if (node)
+        node->SetData ((wxObject *)Client_data);
 }
 
 // Return number of selections and an array of selected integers
 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 {
-    aSelections.Empty();
-
-/* TODO
-    if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
-    {
-        int no_sel = ??
-        for ( int n = 0; n < no_sel; n++ )
-            aSelections.Add(??);
-
-        return no_sel;
-    }
-    else  // single-selection listbox
-    {
-        aSelections.Add(??);
-
-        return 1;
+  aSelections.Empty();
+
+  Widget listBox = (Widget) m_mainWidget;
+  int *posList = NULL;
+  int posCnt = 0;
+  bool flag = XmListGetSelectedPos (listBox, &posList, &posCnt);
+  if (flag)
+  {
+     if (posCnt > 0)
+     {
+        aSelections.Alloc(posCnt);
+
+        int i;
+        for (i = 0; i < posCnt; i++)
+            aSelections.Add(posList[i] - 1);
+
+        XtFree ((char *) posList);
+        return posCnt;
+     }
+     else
+      return 0;
     }
-*/
+  else
     return 0;
 }
 
 // Get single selection, for single choice list items
 int wxListBox::GetSelection() const
 {
-    // TODO
-    return -1;
+    Widget listBox = (Widget) m_mainWidget;
+    int *posList = NULL;
+    int posCnt = 0;
+    bool flag = XmListGetSelectedPos (listBox, &posList, &posCnt);
+    if (flag)
+    {
+        int id = -1;
+        if (posCnt > 0)
+            id = posList[0] - 1;
+        XtFree ((char *) posList);
+        return id;
+    }
+    else
+        return -1;
 }
 
 // Find string for position
 wxString wxListBox::GetString(int N) const
 {
-    // TODO
-    return wxString("");
+    Widget listBox = (Widget) m_mainWidget;
+    XmString *strlist;
+    int n;
+    XtVaGetValues (listBox, XmNitemCount, &n, XmNitems, &strlist, NULL);
+    if (N <= n && N >= 0)
+    {
+        char *txt;
+        if (XmStringGetLtoR (strlist[N], XmSTRING_DEFAULT_CHARSET, &txt))
+        {
+            wxString str(txt);
+            XtFree (txt);
+            return str;
+        }
+        else
+            return wxEmptyString;
+    }
+    else
+        return wxEmptyString;
 }
 
 void wxListBox::SetSize(int x, int y, int width, int height, int sizeFlags)
 {
-    // TODO
+    wxWindow::SetSize(x, y, width, height, sizeFlags);
+
+    // Check resulting size is correct
+    int tempW, tempH;
+    GetSize (&tempW, &tempH);
 }
 
 void wxListBox::InsertItems(int nItems, const wxString items[], int pos)
 {
-    m_noItems += nItems;
+    int width1, height1;
+    int width2, height2;
+
+    Widget listBox = (Widget) m_mainWidget;
+
+    GetSize(&width1, &height1);
+
+    bool managed = XtIsManaged(listBox);
+
+    if (managed)
+        XtUnmanageChild(listBox);
+  
+    XmString *text = new XmString[nItems];
+    int i;
+  // Steve Hammes: Motif 1.1 compatibility
+// #if XmVersion > 1100
+// Corrected by Sergey Krasnov from Steve Hammes' code
+#if XmVersion > 1001
+    for (i = 0; i < nItems; i++)
+        text[i] = XmStringCreateSimple((char*) (const char*) items[i]);
+    XmListAddItemsUnselected(listBox, text, nItems, pos+1);
+#else
+    for (i = 0; i < nItems; i++)
+    {
+        text[i] = XmStringCreateSimple((char*) (const char*) items[i]);
+//    XmListAddItemUnselected(listBox, text[i], i);
+        XmListAddItemUnselected(listBox, text[i], pos+i+1); // Another Sergey correction
+    }
+#endif
+    for (i = 0; i < nItems; i++)
+        XmStringFree(text[i]);
+
+    delete[] text;
+
+    // It seems that if the list is cleared, we must re-ask for
+    // selection policy!!
+    Arg args[3];
+    XtSetArg(args[0], XmNlistSizePolicy, XmCONSTANT);
+    if (m_windowStyle & wxLB_MULTIPLE)
+        XtSetArg(args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+    else if (m_windowStyle & wxLB_EXTENDED)
+        XtSetArg(args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+    else XtSetArg(args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+    XtSetValues(listBox,args,2) ;
+
+    if (managed)
+        XtManageChild(listBox);
+
+    GetSize(&width2, &height2);
+    // Correct for randomly resized listbox - bad boy, Motif!
+    if (width1 != width2 /*|| height1 != height2*/)
+        SetSize(-1, -1, width1, height1);
 
-    // TODO
+    m_noItems += nItems;
 }
 
 void wxListBox::SetString(int N, const wxString& s)
 {
-    // TODO
+    int width1, height1;
+    int width2, height2;
+
+    Widget listBox = (Widget) m_mainWidget;
+    GetSize (&width1, &height1);
+
+    XmString text = XmStringCreateSimple ((char*) (const char*) s);
+
+    // WHAT'S THE MOTIF CALL TO SET THE TEXT OF AN EXISTING
+    // ITEM???
+    // There isn't one, so delete the item and add it again.
+    XmListDeletePos (listBox, N+1);
+    XmListAddItem (listBox, text, N+1);
+
+    XmStringFree(text);
+
+/*
+  // It seems that if the list is cleared, we must re-ask for
+  // selection policy!!
+  Arg args[3];
+  XtSetArg (args[0], XmNlistSizePolicy, XmCONSTANT);
+  if (m_windowStyle & wxLB_MULTIPLE)
+    XtSetArg (args[1], XmNselectionPolicy, XmMULTIPLE_SELECT);
+  else if (m_windowStyle & wxLB_EXTENDED)
+    XtSetArg (args[1], XmNselectionPolicy, XmEXTENDED_SELECT);
+  else
+    XtSetArg (args[1], XmNselectionPolicy, XmBROWSE_SELECT);
+  XtSetValues (listBox, args, 2);
+*/
+
+    GetSize (&width2, &height2);
+    // Correct for randomly resized listbox - bad boy, Motif!
+    if (width1 != width2 || height1 != height2)
+        SetSize (-1, -1, width1, height1);
 }
 
 int wxListBox::Number () const
 {
-  return m_noItems;
+    return m_noItems;
 }
 
 // For single selection items only
 wxString wxListBox::GetStringSelection () const
 {
-  int sel = GetSelection ();
-  if (sel > -1)
-    return this->GetString (sel);
-  else
-    return wxString("");
+    int sel = GetSelection ();
+    if (sel > -1)
+        return this->GetString (sel);
+    else
+        return wxString("");
 }
 
 bool wxListBox::SetStringSelection (const wxString& s, bool flag)
 {
-  int sel = FindString (s);
-  if (sel > -1)
+    int sel = FindString (s);
+    if (sel > -1)
     {
-      SetSelection (sel, flag);
-      return TRUE;
+        SetSelection (sel, flag);
+        return TRUE;
     }
-  else
-    return FALSE;
+    else
+        return FALSE;
 }
 
 void wxListBox::Command (wxCommandEvent & event)
 {
-  if (event.m_extraLong)
-    SetSelection (event.m_commandInt);
-  else
+    if (event.m_extraLong)
+        SetSelection (event.m_commandInt);
+    else
+    {
+        Deselect (event.m_commandInt);
+        return;
+    }
+    ProcessCommand (event);
+}
+
+void wxListBoxCallback (Widget w, XtPointer clientData,
+           XmListCallbackStruct * cbs)
+{
+/*
+    if (cbs->reason == XmCR_EXTENDED_SELECT)
+        cout << "*** Extend select\n";
+    else if (cbs->reason == XmCR_SINGLE_SELECT)
+        cout << "*** Single select\n";
+    else if (cbs->reason == XmCR_MULTIPLE_SELECT)
+        cout << "*** Multiple select\n";
+    else if (cbs->reason == XmCR_BROWSE_SELECT)
+        cout << "*** Browse select\n";
+
+    if (cbs->selection_type == XmMODIFICATION)
+        cout << "*** Modification\n";
+    else if (cbs->selection_type == XmINITIAL)
+        cout << "*** Initial\n";
+    else if (cbs->selection_type == XmADDITION)
+        cout << "*** Addition\n";
+ */
+
+    wxListBox *item = (wxListBox *) clientData;
+
+    if (item->m_inSetValue)
+        return;
+
+    wxCommandEvent event (wxEVT_COMMAND_LISTBOX_SELECTED);
+    switch (cbs->reason)
     {
-      Deselect (event.m_commandInt);
-      return;
+        case XmCR_MULTIPLE_SELECT:
+        case XmCR_BROWSE_SELECT:
+        {
+            event.m_clientData = item->GetClientData (cbs->item_position - 1);
+            //event.commandString = item->GetStringSelection();
+            event.m_commandInt = cbs->item_position - 1;
+            event.m_extraLong = TRUE;
+            event.SetEventObject(item);
+            item->ProcessCommand (event);
+            //delete[] event.commandString; // Let's not store the command string any more
+            break;
+        }
+        case XmCR_EXTENDED_SELECT:
+        {
+            switch (cbs->selection_type)
+            {
+                case XmINITIAL:
+                case XmADDITION:
+                case XmMODIFICATION:
+                {
+                    event.m_clientData = item->GetClientData (cbs->item_position - 1);
+                    event.m_commandInt = cbs->item_position - 1;
+                    event.m_extraLong = TRUE;
+                    event.SetEventObject(item);
+                    item->ProcessCommand (event);
+                    break;
+                }
+            }
+            break;
+        }
     }
-  ProcessCommand (event);
 }
 
+/* Respond by getting the
+ * designated "default button" in the action area and activate it
+ * as if the user had selected it.
+ */
+void wxListBoxDefaultActionProc (Widget list_w, XtPointer client_data, XmListCallbackStruct * cbs)
+{
+    wxListBox *lbox = (wxListBox *) client_data;
+
+    wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, lbox->GetId());
+    event.SetEventObject( lbox );
+    lbox->GetEventHandler()->ProcessEvent(event) ;
+}
+
+