]> git.saurik.com Git - wxWidgets.git/blobdiff - src/common/cmdproc.cpp
[ 1509599 ] 'Split pickers page in widgets sample' with more icons and rebaking.
[wxWidgets.git] / src / common / cmdproc.cpp
index c2d44c895b52398a62e21a931fc50e6b39d7dfee..259d3e0ff7260bd97980fc1b06618bdca1f57130 100644 (file)
@@ -5,7 +5,7 @@
 // Modified by:
 // Created:     05.11.00
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWindows team
+// Copyright:   (c) wxWidgets team
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 // headers
 // ----------------------------------------------------------------------------
 
-#ifdef __GNUG__
-    #pragma implementation "cmdproc.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -53,10 +49,6 @@ wxCommand::wxCommand(bool canUndoIt, const wxString& name)
     m_commandName = name;
 }
 
-wxCommand::~wxCommand()
-{
-}
-
 // ----------------------------------------------------------------------------
 // Command processor
 // ----------------------------------------------------------------------------
@@ -64,10 +56,14 @@ wxCommand::~wxCommand()
 wxCommandProcessor::wxCommandProcessor(int maxCommands)
 {
     m_maxNoCommands = maxCommands;
-    m_currentCommand = (wxNode *) NULL;
 #if wxUSE_MENUS
     m_commandEditMenu = (wxMenu *) NULL;
 #endif // wxUSE_MENUS
+    m_undoAccelerator = wxT("\tCtrl+Z");
+    m_redoAccelerator = wxT("\tCtrl+Y");
+
+    m_lastSavedCommand =
+    m_currentCommand = wxList::compatibility_iterator();
 }
 
 wxCommandProcessor::~wxCommandProcessor()
@@ -87,30 +83,41 @@ bool wxCommandProcessor::UndoCommand(wxCommand& cmd)
 
 // Pass a command to the processor. The processor calls Do();
 // if successful, is appended to the command history unless
-// storeIt is FALSE.
+// storeIt is false.
 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
 {
-    wxCHECK_MSG( command, FALSE, _T("no command in wxCommandProcessor::Submit") );
+    wxCHECK_MSG( command, false, _T("no command in wxCommandProcessor::Submit") );
 
     if ( !DoCommand(*command) )
-        return FALSE;
+    {
+        // the user code expects the command to be deleted anyhow
+        delete command;
+
+        return false;
+    }
 
     if ( storeIt )
         Store(command);
+    else
+        delete command;
 
-    return TRUE;
+    return true;
 }
 
 void wxCommandProcessor::Store(wxCommand *command)
 {
     wxCHECK_RET( command, _T("no command in wxCommandProcessor::Store") );
 
-    if (m_commands.Number() == m_maxNoCommands)
+    if ( (int)m_commands.GetCount() == m_maxNoCommands )
     {
-        wxNode *firstNode = m_commands.First();
-        wxCommand *firstCommand = (wxCommand *)firstNode->Data();
+        wxList::compatibility_iterator firstNode = m_commands.GetFirst();
+        wxCommand *firstCommand = (wxCommand *)firstNode->GetData();
         delete firstCommand;
-        delete firstNode;
+        m_commands.Erase(firstNode);
+
+        // Make sure m_lastSavedCommand won't point to freed memory
+        if ( m_lastSavedCommand == firstNode )
+            m_lastSavedCommand = wxList::compatibility_iterator();
     }
 
     // Correct a bug: we must chop off the current 'branch'
@@ -119,18 +126,23 @@ void wxCommandProcessor::Store(wxCommand *command)
         ClearCommands();
     else
     {
-        wxNode *node = m_currentCommand->Next();
+        wxList::compatibility_iterator node = m_currentCommand->GetNext();
         while (node)
         {
-            wxNode *next = node->Next();
-            delete (wxCommand *)node->Data();
-            delete node;
+            wxList::compatibility_iterator next = node->GetNext();
+            delete (wxCommand *)node->GetData();
+            m_commands.Erase(node);
+
+            // Make sure m_lastSavedCommand won't point to freed memory
+            if ( m_lastSavedCommand == node )
+                m_lastSavedCommand = wxList::compatibility_iterator();
+
             node = next;
         }
     }
 
     m_commands.Append(command);
-    m_currentCommand = m_commands.Last();
+    m_currentCommand = m_commands.GetLast();
     SetMenuStrings();
 }
 
@@ -141,30 +153,39 @@ bool wxCommandProcessor::Undo()
     {
         if ( UndoCommand(*command) )
         {
-            m_currentCommand = m_currentCommand->Previous();
+            m_currentCommand = m_currentCommand->GetPrevious();
             SetMenuStrings();
-            return TRUE;
+            return true;
         }
     }
 
-    return FALSE;
+    return false;
 }
 
 bool wxCommandProcessor::Redo()
 {
     wxCommand *redoCommand = (wxCommand *) NULL;
-    wxNode *redoNode = (wxNode *) NULL;
-    if (m_currentCommand && m_currentCommand->Next())
+    wxList::compatibility_iterator redoNode
+#if !wxUSE_STL
+        = NULL          // just to avoid warnings
+#endif // !wxUSE_STL
+        ;
+
+    if ( m_currentCommand )
     {
-        redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
-        redoNode = m_currentCommand->Next();
+        // is there anything to redo?
+        if ( m_currentCommand->GetNext() )
+        {
+            redoCommand = (wxCommand *)m_currentCommand->GetNext()->GetData();
+            redoNode = m_currentCommand->GetNext();
+        }
     }
-    else
+    else // no current command, redo the first one
     {
-        if (m_commands.Number() > 0)
+        if (m_commands.GetCount() > 0)
         {
-            redoCommand = (wxCommand *)m_commands.First()->Data();
-            redoNode = m_commands.First();
+            redoCommand = (wxCommand *)m_commands.GetFirst()->GetData();
+            redoNode = m_commands.GetFirst();
         }
     }
 
@@ -175,10 +196,10 @@ bool wxCommandProcessor::Redo()
         {
             m_currentCommand = redoNode;
             SetMenuStrings();
-            return TRUE;
+            return true;
         }
     }
-    return FALSE;
+    return false;
 }
 
 bool wxCommandProcessor::CanUndo() const
@@ -190,21 +211,21 @@ bool wxCommandProcessor::CanUndo() const
 
 bool wxCommandProcessor::CanRedo() const
 {
-    if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() == (wxNode*) NULL))
-        return FALSE;
+    if (m_currentCommand && !m_currentCommand->GetNext())
+        return false;
 
-    if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() != (wxNode*) NULL))
-        return TRUE;
+    if (m_currentCommand && m_currentCommand->GetNext())
+        return true;
 
-    if ((m_currentCommand == (wxNode*) NULL) && (m_commands.Number() > 0))
-        return TRUE;
+    if (!m_currentCommand && (m_commands.GetCount() > 0))
+        return true;
 
-    return FALSE;
+    return false;
 }
 
 void wxCommandProcessor::Initialize()
 {
-    m_currentCommand = m_commands.Last();
+    m_currentCommand = m_commands.GetLast();
     SetMenuStrings();
 }
 
@@ -213,74 +234,92 @@ void wxCommandProcessor::SetMenuStrings()
 #if wxUSE_MENUS
     if (m_commandEditMenu)
     {
-        wxString buf;
-        if (m_currentCommand)
+        wxString undoLabel = GetUndoMenuLabel();
+        wxString redoLabel = GetRedoMenuLabel();
+
+        m_commandEditMenu->SetLabel(wxID_UNDO, undoLabel);
+        m_commandEditMenu->Enable(wxID_UNDO, CanUndo());
+
+        m_commandEditMenu->SetLabel(wxID_REDO, redoLabel);
+        m_commandEditMenu->Enable(wxID_REDO, CanRedo());
+    }
+#endif // wxUSE_MENUS
+}
+
+// Gets the current Undo menu label.
+wxString wxCommandProcessor::GetUndoMenuLabel() const
+{
+    wxString buf;
+    if (m_currentCommand)
+    {
+        wxCommand *command = (wxCommand *)m_currentCommand->GetData();
+        wxString commandName(command->GetName());
+        if (commandName.empty()) commandName = _("Unnamed command");
+        bool canUndo = command->CanUndo();
+        if (canUndo)
+            buf = wxString(_("&Undo ")) + commandName + m_undoAccelerator;
+        else
+            buf = wxString(_("Can't &Undo ")) + commandName + m_undoAccelerator;
+    }
+    else
+    {
+        buf = _("&Undo") + m_undoAccelerator;
+    }
+
+    return buf;
+}
+
+// Gets the current Undo menu label.
+wxString wxCommandProcessor::GetRedoMenuLabel() const
+{
+    wxString buf;
+    if (m_currentCommand)
+    {
+        // We can redo, if we're not at the end of the history.
+        if (m_currentCommand->GetNext())
         {
-            wxCommand *command = (wxCommand *)m_currentCommand->Data();
-            wxString commandName(command->GetName());
-            if (commandName == wxT("")) commandName = _("Unnamed command");
-            bool canUndo = command->CanUndo();
-            if (canUndo)
-                buf = wxString(_("&Undo ")) + commandName;
-            else
-                buf = wxString(_("Can't &Undo ")) + commandName;
-
-            m_commandEditMenu->SetLabel(wxID_UNDO, buf);
-            m_commandEditMenu->Enable(wxID_UNDO, canUndo);
-
-            // We can redo, if we're not at the end of the history.
-            if (m_currentCommand->Next())
-            {
-                wxCommand *redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
-                wxString redoCommandName(redoCommand->GetName());
-                if (redoCommandName == wxT("")) redoCommandName = _("Unnamed command");
-                buf = wxString(_("&Redo ")) + redoCommandName;
-                m_commandEditMenu->SetLabel(wxID_REDO, buf);
-                m_commandEditMenu->Enable(wxID_REDO, TRUE);
-            }
-            else
-            {
-                m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
-                m_commandEditMenu->Enable(wxID_REDO, FALSE);
-            }
+            wxCommand *redoCommand = (wxCommand *)m_currentCommand->GetNext()->GetData();
+            wxString redoCommandName(redoCommand->GetName());
+            if (redoCommandName.empty()) redoCommandName = _("Unnamed command");
+            buf = wxString(_("&Redo ")) + redoCommandName + m_redoAccelerator;
         }
         else
         {
-            m_commandEditMenu->SetLabel(wxID_UNDO, _("&Undo"));
-            m_commandEditMenu->Enable(wxID_UNDO, FALSE);
-
-            if (m_commands.Number() == 0)
-            {
-                m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
-                m_commandEditMenu->Enable(wxID_REDO, FALSE);
-            }
-            else
-            {
-                // currentCommand is NULL but there are commands: this means that
-                // we've undone to the start of the list, but can redo the first.
-                wxCommand *redoCommand = (wxCommand *)m_commands.First()->Data();
-                wxString redoCommandName(redoCommand->GetName());
-                if (redoCommandName == wxT("")) redoCommandName = _("Unnamed command");
-                buf = wxString(_("&Redo ")) + redoCommandName;
-                m_commandEditMenu->SetLabel(wxID_REDO, buf);
-                m_commandEditMenu->Enable(wxID_REDO, TRUE);
-            }
+            buf = _("&Redo") + m_redoAccelerator;
         }
     }
-#endif // wxUSE_MENUS
+    else
+    {
+        if (m_commands.GetCount() == 0)
+        {
+            buf = _("&Redo") + m_redoAccelerator;
+        }
+        else
+        {
+            // currentCommand is NULL but there are commands: this means that
+            // we've undone to the start of the list, but can redo the first.
+            wxCommand *redoCommand = (wxCommand *)m_commands.GetFirst()->GetData();
+            wxString redoCommandName(redoCommand->GetName());
+            if (redoCommandName.empty()) redoCommandName = _("Unnamed command");
+            buf = wxString(_("&Redo ")) + redoCommandName + m_redoAccelerator;
+        }
+    }
+    return buf;
 }
 
 void wxCommandProcessor::ClearCommands()
 {
-    wxNode *node = m_commands.First();
+    wxList::compatibility_iterator node = m_commands.GetFirst();
     while (node)
     {
-        wxCommand *command = (wxCommand *)node->Data();
+        wxCommand *command = (wxCommand *)node->GetData();
         delete command;
-        delete node;
-        node = m_commands.First();
+        m_commands.Erase(node);
+        node = m_commands.GetFirst();
     }
-    m_currentCommand = (wxNode *) NULL;
+
+    m_currentCommand = wxList::compatibility_iterator();
+    m_lastSavedCommand = wxList::compatibility_iterator();
 }