Don't use Windows handles directly in headers

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

diff --git a/src/msw/combobox.cpp b/src/msw/combobox.cpp
index 5ac0ec4d7286aafd2fdb4c674244af0e06d60871..d85ef7e8875e1ac76e16a5c1ad4d9f21bb5aada3 100644 (file)
--- a/src/msw/combobox.cpp
+++ b/src/msw/combobox.cpp
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "combobox.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -37,6 +33,7 @@
     #include "wx/textctrl.h"
 #endif
 
     #include "wx/textctrl.h"
 #endif
 

+#include "wx/app.h"

 #include "wx/combobox.h"
 #include "wx/brush.h"
 #include "wx/clipbrd.h"
 #include "wx/combobox.h"
 #include "wx/brush.h"
 #include "wx/clipbrd.h"


@@ -109,10 +106,31 @@ wxBEGIN_HANDLERS_TABLE(wxComboBox)
 wxEND_HANDLERS_TABLE()
 
 wxCONSTRUCTOR_5( wxComboBox , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size )
 wxEND_HANDLERS_TABLE()
 
 wxCONSTRUCTOR_5( wxComboBox , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size )

+

 #else
 #else

+

 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)

+

 #endif
 
 #endif
 

+BEGIN_EVENT_TABLE(wxComboBox, wxControl)
+    EVT_MENU(wxID_CUT, wxComboBox::OnCut)
+    EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
+    EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
+    EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
+    EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
+    EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
+    EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
+
+    EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
+    EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
+    EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
+    EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
+    EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
+    EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
+    EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
+END_EVENT_TABLE()
+

 // ----------------------------------------------------------------------------
 // function prototypes
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // function prototypes
 // ----------------------------------------------------------------------------


@@ -152,6 +170,9 @@ LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd,
         case WM_KEYUP:
         case WM_KEYDOWN:
         case WM_CHAR:
         case WM_KEYUP:
         case WM_KEYDOWN:
         case WM_CHAR:

+        case WM_SYSCHAR:
+        case WM_SYSKEYDOWN:
+        case WM_SYSKEYUP:

         case WM_SETFOCUS:
         case WM_KILLFOCUS:
             {
         case WM_SETFOCUS:
         case WM_KILLFOCUS:
             {


@@ -213,47 +234,47 @@ LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd,
     return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam);
 }
 
     return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam);
 }
 

-WXHBRUSH wxComboBox::OnCtlColor(WXHDC pDC,
-                                WXHWND WXUNUSED(pWnd),
-                                WXUINT WXUNUSED(nCtlColor),
-                                WXUINT WXUNUSED(message),
-                                WXWPARAM WXUNUSED(wParam),
-                                WXLPARAM WXUNUSED(lParam))
-{
-    HDC hdc = (HDC)pDC;
-    wxColour colBack = GetBackgroundColour();
-
-    if (!IsEnabled())
-        colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
-
-    ::SetBkColor(hdc, wxColourToRGB(colBack));
-    ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
-
-    wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
-
-    return (WXHBRUSH)brush->GetResourceHandle();
-}
-

 // ----------------------------------------------------------------------------
 // wxComboBox callbacks
 // ----------------------------------------------------------------------------
 
 WXLRESULT wxComboBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
 // ----------------------------------------------------------------------------
 // wxComboBox callbacks
 // ----------------------------------------------------------------------------
 
 WXLRESULT wxComboBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {

-    // handle WM_CTLCOLOR messages from our EDIT control to be able to set its
-    // colour correctly (to be the same as our own one)
+    // TODO: handle WM_CTLCOLOR messages from our EDIT control to be able to
+    //       set its colour correctly (to be the same as our own one)
+

     switch ( nMsg )
     {
     switch ( nMsg )
     {

-        // we have to handle both: one for the normal case and the other for
-        // wxCB_READONLY
-        case WM_CTLCOLOREDIT:
-        case WM_CTLCOLORSTATIC:
-            WXWORD nCtlColor;
-            WXHDC hdc;
-            WXHWND hwnd;
-            UnpackCtlColor(wParam, lParam, &nCtlColor, &hdc, &hwnd);
-
-            return (WXLRESULT)OnCtlColor(hdc, hwnd, nCtlColor, nMsg, wParam, lParam);
+        case CB_SETCURSEL:
+            // Selection was set with SetSelection.  Update the value too.
+            if ((int)wParam > GetCount())
+                m_value.clear();
+            else
+                m_value = GetString(wParam);
+            m_selectionOld = -1;
+            break;
+
+        case WM_SIZE:
+        // wxStaticBox can generate this message, when modifying the control's style.
+        // This causes the content of the combobox to be selected, for some reason.
+        case WM_STYLECHANGED:
+            {
+                // combobox selection sometimes spontaneously changes when its
+                // size changes, restore it to the old value if necessary
+                long fromOld, toOld;
+                GetSelection(&fromOld, &toOld);
+                WXLRESULT result = wxChoice::MSWWindowProc(nMsg, wParam, lParam);
+
+                long fromNew, toNew;
+                GetSelection(&fromNew, &toNew);
+
+                if ( fromOld != fromNew || toOld != toNew )
+                {
+                    SetSelection(fromOld, toOld);
+                }
+
+                return result;
+            }

     }
 
     return wxChoice::MSWWindowProc(nMsg, wParam, lParam);
     }
 
     return wxChoice::MSWWindowProc(nMsg, wParam, lParam);


@@ -272,14 +293,24 @@ bool wxComboBox::MSWProcessEditMsg(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam)
                 InitCommandEvent(event);
                 event.SetString(GetValue());
                 event.SetInt(GetSelection());
                 InitCommandEvent(event);
                 event.SetString(GetValue());
                 event.SetInt(GetSelection());

-                ProcessCommand(event);
+                if ( ProcessCommand(event) )
+                {
+                    // don't let the event through to the native control
+                    // because it doesn't need it and may generate an annoying
+                    // beep if it gets it
+                    return true;
+                }

             }
             }

+            // fall through

 
 

+        case WM_SYSCHAR:

             return HandleChar(wParam, lParam, true /* isASCII */);
 
             return HandleChar(wParam, lParam, true /* isASCII */);
 

+        case WM_SYSKEYDOWN:

         case WM_KEYDOWN:
             return HandleKeyDown(wParam, lParam);
 
         case WM_KEYDOWN:
             return HandleKeyDown(wParam, lParam);
 

+        case WM_SYSKEYUP:

         case WM_KEYUP:
             return HandleKeyUp(wParam, lParam);
 
         case WM_KEYUP:
             return HandleKeyUp(wParam, lParam);
 


@@ -293,26 +324,40 @@ bool wxComboBox::MSWProcessEditMsg(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam)
     return false;
 }
 
     return false;
 }
 

-bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
+bool wxComboBox::MSWCommand(WXUINT param, WXWORD id)

 {
     wxString value;
     int sel = -1;
     switch ( param )
     {
 {
     wxString value;
     int sel = -1;
     switch ( param )
     {

+        case CBN_SELENDOK:

         case CBN_SELCHANGE:
             sel = GetSelection();
         case CBN_SELCHANGE:
             sel = GetSelection();

-            if ( sel > -1 )
+
+            // we may sometimes get 2 CBN_SELCHANGE events or a CBN_SELENDOK
+            // before CBN_SELCHANGE with the same index when the user selects
+            // an item in the combobox -- ignore duplicates
+            if ( sel > -1 && sel != m_selectionOld )

             {
             {

-                value = GetString(sel);
+                m_selectionOld = sel;
+
+                // GetValue() would still return the old value from here but
+                // according to the docs we should return the new value if the
+                // user calls it in his event handler, so update internal
+                // m_value
+                m_value = GetString(sel);

 
                 wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId());
                 event.SetInt(sel);
                 event.SetEventObject(this);
 
                 wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId());
                 event.SetInt(sel);
                 event.SetEventObject(this);

-                event.SetString(value);
+                event.SetString(m_value);

                 ProcessCommand(event);
             }
                 ProcessCommand(event);
             }

-            else
+            else // no valid selection

             {
             {

+                m_selectionOld = sel;
+
+                // hence no EVT_TEXT neither

                 break;
             }
 
                 break;
             }
 


@@ -329,33 +374,34 @@ bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
                 // want the new one)
                 if ( sel == -1 )
                 {
                 // want the new one)
                 if ( sel == -1 )
                 {

-                    value = GetValue();
+                    m_value = wxGetWindowText(GetHwnd());
+                    m_selectionOld = -1;

                 }
                 else // we're synthesizing text updated event from sel change
                 {
                 }
                 else // we're synthesizing text updated event from sel change
                 {

-                    // We need to retrieve the current selection because the user
-                    // may have changed it in the previous handler (for CBN_SELCHANGE
-                    // above).
+                    // We need to retrieve the current selection because the
+                    // user may have changed it in the previous handler (for
+                    // CBN_SELCHANGE above).

                     sel = GetSelection();
                     if ( sel > -1 )
                     {
                     sel = GetSelection();
                     if ( sel > -1 )
                     {

-                        value = GetString(sel);
+                        m_value = GetString(sel);

                     }
                     }

-                    // we need to do this because the user code expects
-                    // wxComboBox::GetValue() to return the new value from
-                    // "text updated" handler but it hadn't been updated yet
-                    SetValue(value);

                 }
 
                 }
 

-                event.SetString(value);
+                event.SetString(m_value);

                 event.SetEventObject(this);
                 ProcessCommand(event);
             }
             break;
                 event.SetEventObject(this);
                 ProcessCommand(event);
             }
             break;

+
+        default:
+            return wxChoice::MSWCommand(param, id);

     }
 
     }
 

-    // there is no return value for the CBN_ notifications, so always return
-    // false from here to pass the message to DefWindowProc()
+    // let the def window proc have it by returning false, but do not pass the
+    // message we've already handled here (notably CBN_SELCHANGE) to the base
+    // class as it would generate another event for them

     return false;
 }
 
     return false;
 }
 


@@ -442,6 +488,11 @@ WXDWORD wxComboBox::MSWGetStyle(long style, WXDWORD *exstyle) const
                         (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
                       );
 
                         (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
                       );
 

+    // usually WS_TABSTOP is added by wxControl::MSWGetStyle() but as we're
+    // created hidden (see Create() above), it is not done for us but we still
+    // want to have this style
+    msStyle |= WS_TABSTOP;
+

     // remove the style always added by wxChoice
     msStyle &= ~CBS_DROPDOWNLIST;
 
     // remove the style always added by wxChoice
     msStyle &= ~CBS_DROPDOWNLIST;
 


@@ -472,22 +523,113 @@ void wxComboBox::SetValue(const wxString& value)
         SetStringSelection(value);
     else
         SetWindowText(GetHwnd(), value.c_str());
         SetStringSelection(value);
     else
         SetWindowText(GetHwnd(), value.c_str());

+
+    m_value = value;
+    m_selectionOld = GetSelection();

 }
 
 // Clipboard operations
 void wxComboBox::Copy()
 {
 }
 
 // Clipboard operations
 void wxComboBox::Copy()
 {

-  SendMessage(GetHwnd(), WM_COPY, 0, 0L);
+    SendMessage(GetHwnd(), WM_COPY, 0, 0L);

 }
 
 void wxComboBox::Cut()
 {
 }
 
 void wxComboBox::Cut()
 {

-  SendMessage(GetHwnd(), WM_CUT, 0, 0L);
+    SendMessage(GetHwnd(), WM_CUT, 0, 0L);

 }
 
 void wxComboBox::Paste()
 {
 }
 
 void wxComboBox::Paste()
 {

-  SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
+    SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
+}
+
+void wxComboBox::Undo()
+{
+    if (CanUndo())
+    {
+        HWND hEditWnd = (HWND) GetEditHWND() ;
+        if ( hEditWnd )
+            ::SendMessage(hEditWnd, EM_UNDO, 0, 0);
+    }
+}
+
+void wxComboBox::Redo()
+{
+    if (CanUndo())
+    {
+        // Same as Undo, since Undo undoes the undo, i.e. a redo.
+        HWND hEditWnd = (HWND) GetEditHWND() ;
+        if ( hEditWnd )
+            ::SendMessage(hEditWnd, EM_UNDO, 0, 0);
+    }
+}
+
+void wxComboBox::SelectAll()
+{
+    SetSelection(0, GetLastPosition());
+}
+
+bool wxComboBox::CanUndo() const
+{
+    if (!IsEditable())
+        return false;
+
+    HWND hEditWnd = (HWND) GetEditHWND() ;
+    if ( hEditWnd )
+        return ::SendMessage(hEditWnd, EM_CANUNDO, 0, 0) != 0;
+    else
+        return false;
+}
+
+bool wxComboBox::CanRedo() const
+{
+    if (!IsEditable())
+        return false;
+
+    HWND hEditWnd = (HWND) GetEditHWND() ;
+    if ( hEditWnd )
+        return ::SendMessage(hEditWnd, EM_CANUNDO, 0, 0) != 0;
+    else
+        return false;
+}
+
+bool wxComboBox::HasSelection() const
+{
+    long from, to;
+    GetSelection(&from, &to);
+    return from != to;
+}
+
+bool wxComboBox::CanCopy() const
+{
+    // Can copy if there's a selection
+    return HasSelection();
+}
+
+bool wxComboBox::CanCut() const
+{
+    return IsEditable() && CanCopy() ;
+}
+
+bool wxComboBox::CanPaste() const
+{
+    if ( !IsEditable() )
+        return false;
+
+    // Standard edit control: check for straight text on clipboard
+    if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
+        return false;
+
+    bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
+    ::CloseClipboard();
+
+    return isTextAvailable;
+}
+
+bool wxComboBox::IsEditable() const
+{
+    return !HasFlag(wxCB_READONLY);

 }
 
 void wxComboBox::SetEditable(bool WXUNUSED(editable))
 }
 
 void wxComboBox::SetEditable(bool WXUNUSED(editable))


@@ -521,30 +663,28 @@ void wxComboBox::SetInsertionPointEnd()
     // setting insertion point doesn't make sense for read only comboboxes
     if ( !(GetWindowStyle() & wxCB_READONLY) )
     {
     // setting insertion point doesn't make sense for read only comboboxes
     if ( !(GetWindowStyle() & wxCB_READONLY) )
     {

-        long pos = GetLastPosition();
+        wxTextPos pos = GetLastPosition();

         SetInsertionPoint(pos);
     }
 }
 
 long wxComboBox::GetInsertionPoint() const
 {
         SetInsertionPoint(pos);
     }
 }
 
 long wxComboBox::GetInsertionPoint() const
 {

-#ifdef __WIN32__
-    DWORD Pos=(DWORD)SendMessage(GetHwnd(), CB_GETEDITSEL, 0, 0L);
-    return Pos&0xFFFF;
-#else
-    return 0;
-#endif
+    // CB_GETEDITSEL returns the index of the first character of the selection in
+    // its low-order word
+    DWORD pos= (DWORD)::SendMessage(GetHwnd(), CB_GETEDITSEL, 0, 0L);
+    return LOWORD(pos);

 }
 
 }
 

-long wxComboBox::GetLastPosition() const
+wxTextPos wxComboBox::GetLastPosition() const

 {
     HWND hEditWnd = (HWND) GetEditHWND();
 
     // Get number of characters in the last (only) line. We'll add this to the character
     // index for the last line, 1st position.
 {
     HWND hEditWnd = (HWND) GetEditHWND();
 
     // Get number of characters in the last (only) line. We'll add this to the character
     // index for the last line, 1st position.

-    int lineLength = (int)SendMessage(hEditWnd, EM_LINELENGTH, (WPARAM) 0, (LPARAM)0L);
+    wxTextPos lineLength = (wxTextPos)SendMessage(hEditWnd, EM_LINELENGTH, (WPARAM) 0, (LPARAM)0L);

 
 

-    return (long)(lineLength);
+    return lineLength;

 }
 
 void wxComboBox::Replace(long from, long to, const wxString& value)
 }
 
 void wxComboBox::Replace(long from, long to, const wxString& value)


@@ -557,6 +697,10 @@ void wxComboBox::Replace(long from, long to, const wxString& value)
 
     // Paste into edit control
     SendMessage(GetHwnd(), WM_PASTE, (WPARAM)0, (LPARAM)0L);
 
     // Paste into edit control
     SendMessage(GetHwnd(), WM_PASTE, (WPARAM)0, (LPARAM)0L);

+#else
+    wxUnusedVar(from);
+    wxUnusedVar(to);
+    wxUnusedVar(value);

 #endif
 }
 
 #endif
 }
 


@@ -569,23 +713,124 @@ void wxComboBox::Remove(long from, long to)
 
 void wxComboBox::SetSelection(long from, long to)
 {
 
 void wxComboBox::SetSelection(long from, long to)
 {

-    HWND hWnd = GetHwnd();
-    long fromChar = from;
-    long toChar = to;
-    // if from and to are both -1, it means
-    // (in wxWidgets) that all text should be selected.
-    // This translates into Windows convention
-    if ((from == -1) && (to == -1))
+    // if from and to are both -1, it means (in wxWidgets) that all text should
+    // be selected, translate this into Windows convention
+    if ( (from == -1) && (to == -1) )

     {
     {

-      fromChar = 0;
-      toChar = -1;
+        from = 0;

     }
 
     }
 

-    if ( SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar)) == CB_ERR )
+    if ( SendMessage(GetHwnd(), CB_SETEDITSEL,
+                     0, (LPARAM)MAKELONG(from, to)) == CB_ERR )

     {
         wxLogDebug(_T("CB_SETEDITSEL failed"));
     }
 }
 
     {
         wxLogDebug(_T("CB_SETEDITSEL failed"));
     }
 }
 

+void wxComboBox::GetSelection(long* from, long* to) const
+{
+    DWORD dwStart, dwEnd;
+    if ( ::SendMessage(GetHwnd(), CB_GETEDITSEL,
+                       (WPARAM)&dwStart, (LPARAM)&dwEnd) == CB_ERR )
+    {
+        *from =
+        *to = 0;
+    }
+    else
+    {
+        *from = dwStart;
+        *to = dwEnd;
+    }
+}
+
+int wxComboBox::GetSelection() const
+{
+    return wxChoice::GetSelection();
+}
+
+void wxComboBox::Clear()
+{
+    wxChoice::Clear();
+    m_selectionOld = -1;
+    m_value.clear();
+}
+
+// ----------------------------------------------------------------------------
+// standard event handling
+// ----------------------------------------------------------------------------
+
+void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
+{
+    Cut();
+}
+
+void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
+{
+    Copy();
+}
+
+void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
+{
+    Paste();
+}
+
+void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
+{
+    Undo();
+}
+
+void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
+{
+    Redo();
+}
+
+void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
+{
+    long from, to;
+    GetSelection(& from, & to);
+    if (from != -1 && to != -1)
+        Remove(from, to);
+}
+
+void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
+{
+    SetSelection(-1, -1);
+}
+
+void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
+{
+    event.Enable( CanCut() );
+}
+
+void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
+{
+    event.Enable( CanCopy() );
+}
+
+void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
+{
+    event.Enable( CanPaste() );
+}
+
+void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
+{
+    event.Enable( CanUndo() );
+}
+
+void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
+{
+    event.Enable( CanRedo() );
+}
+
+void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
+{
+    event.Enable(HasSelection() && IsEditable()) ;
+}
+
+void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
+{
+    event.Enable(GetLastPosition() > 0);
+}
+

 #endif // wxUSE_COMBOBOX
 
 #endif // wxUSE_COMBOBOX