Misc. fixes

[wxWidgets.git] / src / msw / textctrl.cpp

diff --git a/src/msw/textctrl.cpp b/src/msw/textctrl.cpp
index 63bcc632f2f906f6d54b051bc72bfd1525bff81d..630fc2717603b28c7cd70c6d3a0e35cbdf5954e6 100644 (file)
--- a/src/msw/textctrl.cpp
+++ b/src/msw/textctrl.cpp
@@ -68,13 +68,27 @@
 #endif
 
 #if !USE_SHARED_LIBRARY
+
 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 
 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
   EVT_CHAR(wxTextCtrl::OnChar)
   EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
   EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
+
+  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()
+
 #endif // USE_SHARED_LIBRARY
 
 // Text item
@@ -363,20 +377,29 @@ void wxTextCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 // Clipboard operations
 void wxTextCtrl::Copy()
 {
-  HWND hWnd = (HWND) GetHWND();
-  SendMessage(hWnd, WM_COPY, 0, 0L);
+    if (CanCopy())
+    {
+        HWND hWnd = (HWND) GetHWND();
+        SendMessage(hWnd, WM_COPY, 0, 0L);
+    }
 }
 
 void wxTextCtrl::Cut()
 {
-  HWND hWnd = (HWND) GetHWND();
-  SendMessage(hWnd, WM_CUT, 0, 0L);
+    if (CanCut())
+    {
+        HWND hWnd = (HWND) GetHWND();
+        SendMessage(hWnd, WM_CUT, 0, 0L);
+    }
 }
 
 void wxTextCtrl::Paste()
 {
-  HWND hWnd = (HWND) GetHWND();
-  SendMessage(hWnd, WM_PASTE, 0, 0L);
+    if (CanPaste())
+    {
+        HWND hWnd = (HWND) GetHWND();
+        SendMessage(hWnd, WM_PASTE, 0, 0L);
+    }
 }
 
 void wxTextCtrl::SetEditable(bool editable)
@@ -709,7 +732,7 @@ void wxTextCtrl::ShowPosition(long pos)
     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 
     if (linesToScroll != 0)
-      (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)MAKELPARAM(linesToScroll, 0));
+      (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 }
 
 int wxTextCtrl::GetLineLength(long lineNo) const
@@ -729,9 +752,103 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
   return wxString(wxBuffer);
 }
 
-/*
- * Text item
- */
+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) ;
+}
+
+bool wxTextCtrl::CanPaste() const
+{
+#if wxUSE_RICHEDIT
+    if (m_isRich)
+    {
+        int dataFormat = 0; // 0 == any format
+        return (::SendMessage( (HWND) GetHWND(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
+    }
+#endif
+    if (!IsEditable())
+        return FALSE;
+
+    // Standard edit control: check for straight text on clipboard
+    bool isTextAvailable = FALSE;
+    if (::OpenClipboard((HWND) wxTheApp->GetTopWindow()->GetHWND()))
+    {
+        isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
+        ::CloseClipboard();
+    }
+    return isTextAvailable;
+}
+
+// Undo/redo
+void wxTextCtrl::Undo()
+{
+    if (CanUndo())
+    {
+        ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
+    }
+}
+
+void wxTextCtrl::Redo()
+{
+    if (CanRedo())
+    {
+        // Same as Undo, since Undo undoes the undo, i.e. a redo.
+        ::SendMessage((HWND) GetHWND(), EM_UNDO, 0, 0);
+    }
+}
+
+bool wxTextCtrl::CanUndo() const
+{
+    return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
+}
+
+bool wxTextCtrl::CanRedo() const
+{
+    return (::SendMessage((HWND) GetHWND(), EM_CANUNDO, 0, 0) != 0);
+}
+
+// If the return values from and to are the same, there is no
+// selection.
+void wxTextCtrl::GetSelection(long* from, long* to) const
+{
+#if wxUSE_RICHEDIT
+    if (m_isRich)
+    {
+        CHARRANGE charRange;
+        ::SendMessage((HWND) GetHWND(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
+
+        *from = charRange.cpMin;
+        *to = charRange.cpMax;
+
+        return;
+    }
+#endif
+    DWORD dwStart, dwEnd;
+    WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
+    LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
+
+    ::SendMessage((HWND) GetHWND(), EM_GETSEL, wParam, lParam);
+
+    *from = dwStart;
+    *to = dwEnd;
+}
+
+bool wxTextCtrl::IsEditable() const
+{
+    long style = ::GetWindowLong((HWND) GetHWND(), GWL_STYLE);
+    return ((style & ES_READONLY) == 0);
+}
 
 void wxTextCtrl::Command(wxCommandEvent & event)
 {
@@ -1141,3 +1258,53 @@ bool wxTextCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
 #endif
 #endif
 
+void wxTextCtrl::OnCut(wxCommandEvent& event)
+{
+    Cut();
+}
+
+void wxTextCtrl::OnCopy(wxCommandEvent& event)
+{
+    Copy();
+}
+
+void wxTextCtrl::OnPaste(wxCommandEvent& event)
+{
+    Paste();
+}
+
+void wxTextCtrl::OnUndo(wxCommandEvent& event)
+{
+    Undo();
+}
+
+void wxTextCtrl::OnRedo(wxCommandEvent& 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() );
+}
+