Fix restoring the status bar help message after closing MSW menu from keyboard.

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

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index c1e6fb31db19136448e9629165556bd1f002c3e2..a14e5494647348b5818aea653a7feeead03e58bb 100644 (file)
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -26,73 +26,19 @@
 
 #if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
 
 
 #if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
 

+#include "wx/choice.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-    #include "wx/choice.h"

     #include "wx/utils.h"
     #include "wx/utils.h"

+    #include "wx/app.h"

     #include "wx/log.h"
     #include "wx/brush.h"
     #include "wx/settings.h"
 #endif
 
     #include "wx/log.h"
     #include "wx/brush.h"
     #include "wx/settings.h"
 #endif
 

-#include "wx/msw/private.h"
+#include "wx/dynlib.h"

 
 

-#if wxUSE_EXTENDED_RTTI
-WX_DEFINE_FLAGS( wxChoiceStyle )
-
-wxBEGIN_FLAGS( wxChoiceStyle )
-    // new style border flags, we put them first to
-    // use them for streaming out
-    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
-    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
-    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
-    wxFLAGS_MEMBER(wxBORDER_RAISED)
-    wxFLAGS_MEMBER(wxBORDER_STATIC)
-    wxFLAGS_MEMBER(wxBORDER_NONE)
-
-    // old style border flags
-    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
-    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
-    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
-    wxFLAGS_MEMBER(wxRAISED_BORDER)
-    wxFLAGS_MEMBER(wxSTATIC_BORDER)
-    wxFLAGS_MEMBER(wxBORDER)
-
-    // standard window styles
-    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
-    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
-    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
-    wxFLAGS_MEMBER(wxWANTS_CHARS)
-    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
-    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
-    wxFLAGS_MEMBER(wxVSCROLL)
-    wxFLAGS_MEMBER(wxHSCROLL)
-
-wxEND_FLAGS( wxChoiceStyle )
-
-IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControl,"wx/choice.h")
-
-wxBEGIN_PROPERTIES_TABLE(wxChoice)
-    wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )
-
-    wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    wxPROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
-wxEND_PROPERTIES_TABLE()
-
-wxBEGIN_HANDLERS_TABLE(wxChoice)
-wxEND_HANDLERS_TABLE()
-
-wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
-#else
-IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
-#endif
-/*
-    TODO PROPERTIES
-        selection (long)
-        content (list)
-            item
-*/
+#include "wx/msw/private.h"

 
 // ============================================================================
 // implementation
 
 // ============================================================================
 // implementation


@@ -116,8 +62,8 @@ bool wxChoice::Create(wxWindow *parent,
     wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
                   !(style & wxCB_READONLY) &&
                   !(style & wxCB_SIMPLE),
     wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
                   !(style & wxCB_READONLY) &&
                   !(style & wxCB_SIMPLE),

-                  _T("this style flag is ignored by wxChoice, you ")
-                  _T("probably want to use a wxComboBox") );
+                  wxT("this style flag is ignored by wxChoice, you ")
+                  wxT("probably want to use a wxComboBox") );

 
     return CreateAndInit(parent, id, pos, size, n, choices, style,
                          validator, name);
 
     return CreateAndInit(parent, id, pos, size, n, choices, style,
                          validator, name);


@@ -141,22 +87,30 @@ bool wxChoice::CreateAndInit(wxWindow *parent,
         return false;
 
 
         return false;
 
 

-    // choice/combobox normally has "white" (depends on colour scheme, of
-    // course) background rather than inheriting the parent's background
-    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-

     // initialize the controls contents
     // initialize the controls contents

-    for ( int i = 0; i < n; i++ )
-    {
-        Append(choices[i]);
-    }
+    Append(n, choices);

 
     // and now we may finally size the control properly (if needed)
 
     // and now we may finally size the control properly (if needed)

-    SetBestSize(size);
+    SetInitialSize(size);

 
     return true;
 }
 
 
     return true;
 }
 

+void wxChoice::SetLabel(const wxString& label)
+{
+    if ( FindString(label) == wxNOT_FOUND )
+    {
+        // unless we explicitly do this here, CB_GETCURSEL will continue to
+        // return the index of the previously selected item which will result
+        // in wrongly replacing the value being set now with the previously
+        // value if the user simply opens and closes (without selecting
+        // anything) the combobox popup
+        SetSelection(-1);
+    }
+
+    wxChoiceBase::SetLabel(label);
+}
+

 bool wxChoice::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,
 bool wxChoice::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,


@@ -208,95 +162,131 @@ WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
     return msStyle;
 }
 
     return msStyle;
 }
 

-wxChoice::~wxChoice()
+#ifndef EP_EDITTEXT
+    #define EP_EDITTEXT         1
+    #define ETS_NORMAL          1
+#endif
+
+wxVisualAttributes
+wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))

 {
 {

-    Free();
+    // it is important to return valid values for all attributes from here,
+    // GetXXX() below rely on this
+    wxVisualAttributes attrs;
+
+    // FIXME: Use better dummy window?
+    wxWindow* wnd = wxTheApp->GetTopWindow();
+    if (!wnd)
+        return attrs;
+
+    attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+
+    // there doesn't seem to be any way to get the text colour using themes
+    // API: TMT_TEXTCOLOR doesn't work neither for EDIT nor COMBOBOX
+    attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
+
+    // NB: use EDIT, not COMBOBOX (the latter works in XP but not Vista)
+    attrs.colBg = wnd->MSWGetThemeColour(L"EDIT",
+                                         EP_EDITTEXT,
+                                         ETS_NORMAL,
+                                         ThemeColourBackground,
+                                         wxSYS_COLOUR_WINDOW);
+
+    return attrs;

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// adding/deleting items to/from the list
-// ----------------------------------------------------------------------------
+wxChoice::~wxChoice()
+{
+    Clear();
+}

 
 

-int wxChoice::DoAppend(const wxString& item)
+bool wxChoice::MSWGetComboBoxInfo(tagCOMBOBOXINFO* info) const

 {
 {

-    int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LPARAM)item.c_str());
-    if ( n == CB_ERR )
+    // TODO-Win9x: Get rid of this once we officially drop support for Win9x
+    //             and just call the function directly.
+#if wxUSE_DYNLIB_CLASS
+    typedef BOOL (WINAPI *GetComboBoxInfo_t)(HWND, tagCOMBOBOXINFO*);
+    static GetComboBoxInfo_t s_pfnGetComboBoxInfo = NULL;
+    static bool s_triedToLoad = false;
+    if ( !s_triedToLoad )

     {
     {

-        wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
-    }
-    else // ok
-    {
-        // we need to refresh our size in order to have enough space for the
-        // newly added items
-        if ( !IsFrozen() )
-            UpdateVisibleHeight();
+        s_triedToLoad = true;
+        wxLoadedDLL dllUser32("user32.dll");
+        wxDL_INIT_FUNC(s_pfn, GetComboBoxInfo, dllUser32);

     }
 
     }
 

-    InvalidateBestSize();
-    return n;
+    if ( s_pfnGetComboBoxInfo )
+        return (*s_pfnGetComboBoxInfo)(GetHwnd(), info) != 0;
+#endif // wxUSE_DYNLIB_CLASS
+
+    return false;

 }
 
 }
 

-int wxChoice::DoInsert(const wxString& item, int pos)
+// ----------------------------------------------------------------------------
+// adding/deleting items to/from the list
+// ----------------------------------------------------------------------------
+
+int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
+                            unsigned int pos,
+                            void **clientData, wxClientDataType type)

 {
 {

-    wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
-    wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
+    MSWAllocStorage(items, CB_INITSTORAGE);

 
 

-    int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str());
-    if ( n == CB_ERR )
-    {
-        wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)"));
-    }
-    else // ok
+    const bool append = pos == GetCount();
+
+    // use CB_ADDSTRING when appending at the end to make sure the control is
+    // resorted if it has wxCB_SORT style
+    const unsigned msg = append ? CB_ADDSTRING : CB_INSERTSTRING;
+
+    if ( append )
+        pos = 0;
+
+    int n = wxNOT_FOUND;
+    const unsigned numItems = items.GetCount();
+    for ( unsigned i = 0; i < numItems; ++i )

     {
     {

-        if ( !IsFrozen() )
-            UpdateVisibleHeight();
+        n = MSWInsertOrAppendItem(pos, items[i], msg);
+        if ( n == wxNOT_FOUND )
+            return n;
+
+        if ( !append )
+            pos++;
+
+        AssignNewItemClientData(n, clientData, i, type);

     }
 
     }
 

+    // we need to refresh our size in order to have enough space for the
+    // newly added items
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
+

     InvalidateBestSize();
     InvalidateBestSize();

+

     return n;
 }
 
     return n;
 }
 

-void wxChoice::Delete(int n)
+void wxChoice::DoDeleteOneItem(unsigned int n)

 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 
 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 

-    if ( HasClientObjectData() )
-    {
-        delete GetClientObject(n);
-    }
-

     SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     if ( !IsFrozen() )
     SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     if ( !IsFrozen() )

-        UpdateVisibleHeight();
+        MSWUpdateDropDownHeight();

 
     InvalidateBestSize();
 }
 
 
     InvalidateBestSize();
 }
 

-void wxChoice::Clear()
+void wxChoice::DoClear()

 {
 {

-    Free();
-

     SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
 
     if ( !IsFrozen() )
     SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
 
     if ( !IsFrozen() )

-        UpdateVisibleHeight();
+        MSWUpdateDropDownHeight();

 
     InvalidateBestSize();
 }
 
 
     InvalidateBestSize();
 }
 

-void wxChoice::Free()
-{
-    if ( HasClientObjectData() )
-    {
-        size_t count = GetCount();
-        for ( size_t n = 0; n < count; n++ )
-        {
-            delete GetClientObject(n);
-        }
-    }
-}
-

 // ----------------------------------------------------------------------------
 // selection
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // selection
 // ----------------------------------------------------------------------------


@@ -326,9 +316,9 @@ void wxChoice::SetSelection(int n)
 // string list functions
 // ----------------------------------------------------------------------------
 
 // string list functions
 // ----------------------------------------------------------------------------
 

-size_t wxChoice::GetCount() const
+unsigned int wxChoice::GetCount() const

 {
 {

-    return (size_t)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
+    return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);

 }
 
 int wxChoice::FindString(const wxString& s, bool bCase) const
 }
 
 int wxChoice::FindString(const wxString& s, bool bCase) const


@@ -336,11 +326,11 @@ int wxChoice::FindString(const wxString& s, bool bCase) const
 #if defined(__WATCOMC__) && defined(__WIN386__)
     // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
     // wxChoice::Do it the long way instead.
 #if defined(__WATCOMC__) && defined(__WIN386__)
     // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
     // wxChoice::Do it the long way instead.

-    size_t count = GetCount();
-    for ( size_t i = 0; i < count; i++ )
+    unsigned int count = GetCount();
+    for ( unsigned int i = 0; i < count; i++ )

     {
         // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too
     {
         // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too

-        if ( GetString(i).IsSameAs(s, bCase) )
+        if (GetString(i).IsSameAs(s, bCase))

             return i;
     }
 
             return i;
     }
 


@@ -350,10 +340,10 @@ int wxChoice::FindString(const wxString& s, bool bCase) const
    //passed to SendMessage, so we have to do it ourselves in that case
    if ( s.empty() )
    {
    //passed to SendMessage, so we have to do it ourselves in that case
    if ( s.empty() )
    {

-       size_t count = GetCount();
-       for ( size_t i = 0; i < count; i++ )
+       unsigned int count = GetCount();
+       for ( unsigned int i = 0; i < count; i++ )

        {
        {

-         if ( GetString(i).empty() )
+         if (GetString(i).empty())

              return i;
        }
 
              return i;
        }
 


@@ -367,44 +357,50 @@ int wxChoice::FindString(const wxString& s, bool bCase) const
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,

-                                  (WPARAM)-1, (LPARAM)s.c_str());
+                                  (WPARAM)-1, wxMSW_CONV_LPARAM(s));

 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }
 #endif // Watcom/!Watcom
 }
 
 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }
 #endif // Watcom/!Watcom
 }
 

-void wxChoice::SetString(int n, const wxString& s)
+void wxChoice::SetString(unsigned int n, const wxString& s)

 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
 
     // we have to delete and add back the string as there is no way to change a
     // string in place
 
 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
 
     // we have to delete and add back the string as there is no way to change a
     // string in place
 

-    // we need to preserve the client data
-    void *data;
-    if ( m_clientDataItemsType != wxClientData_None )
-    {
-        data = DoGetItemClientData(n);
-    }
-    else // no client data
-    {
-        data = NULL;
-    }
+    // we need to preserve the client data manually
+    void *oldData = NULL;
+    wxClientData *oldObjData = NULL;
+    if ( HasClientUntypedData() )
+        oldData = GetClientData(n);
+    else if ( HasClientObjectData() )
+        oldObjData = GetClientObject(n);
+
+    // and also the selection if we're going to delete the item that was
+    // selected
+    const bool wasSelected = static_cast<int>(n) == GetSelection();

 
     ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);

-    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.c_str() );
+    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, wxMSW_CONV_LPARAM(s) );

 
 

-    if ( data )
-    {
-        DoSetItemClientData(n, data);
-    }
-    //else: it's already NULL by default
+    // restore the client data
+    if ( oldData )
+        SetClientData(n, oldData);
+    else if ( oldObjData )
+        SetClientObject(n, oldObjData);
+
+    // and the selection
+    if ( wasSelected )
+        SetSelection(n);

 
 

+    // the width could have changed so the best size needs to be recomputed

     InvalidateBestSize();
 }
 
     InvalidateBestSize();
 }
 

-wxString wxChoice::GetString(int n) const
+wxString wxChoice::GetString(unsigned int n) const

 {
     int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
 
 {
     int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
 


@@ -430,7 +426,7 @@ wxString wxChoice::GetString(int n) const
 // client data
 // ----------------------------------------------------------------------------
 
 // client data
 // ----------------------------------------------------------------------------
 

-void wxChoice::DoSetItemClientData( int n, void* clientData )
+void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)

 {
     if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
                        n, (LPARAM)clientData) == CB_ERR )
 {
     if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
                        n, (LPARAM)clientData) == CB_ERR )


@@ -439,10 +435,10 @@ void wxChoice::DoSetItemClientData( int n, void* clientData )
     }
 }
 
     }
 }
 

-void* wxChoice::DoGetItemClientData( int n ) const
+void* wxChoice::DoGetItemClientData(unsigned int n) const

 {
     LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
 {
     LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);

-    if ( rc == CB_ERR )
+    if ( rc == CB_ERR && GetLastError() != ERROR_SUCCESS )

     {
         wxLogLastError(wxT("CB_GETITEMDATA"));
 
     {
         wxLogLastError(wxT("CB_GETITEMDATA"));
 


@@ -453,24 +449,46 @@ void* wxChoice::DoGetItemClientData( int n ) const
     return (void *)rc;
 }
 
     return (void *)rc;
 }
 

-void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
+// ----------------------------------------------------------------------------
+// wxMSW-specific geometry management
+// ----------------------------------------------------------------------------
+
+namespace

 {
 {

-    DoSetItemClientData(n, clientData);
-}

 
 

-wxClientData* wxChoice::DoGetItemClientObject( int n ) const
+// there is a difference between the height passed to CB_SETITEMHEIGHT and the
+// real height of the combobox; it is probably not constant for all Windows
+// versions/settings but right now I don't know how to find what it is so it is
+// temporarily hardcoded to its value under XP systems with normal fonts sizes
+const int COMBO_HEIGHT_ADJ = 6;
+
+} // anonymous namespace
+
+void wxChoice::MSWUpdateVisibleHeight()

 {
 {

-    return (wxClientData *)DoGetItemClientData(n);
+    if ( m_heightOwn != wxDefaultCoord )
+    {
+        ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT,
+                      (WPARAM)-1, m_heightOwn - COMBO_HEIGHT_ADJ);
+    }

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// wxMSW specific helpers
-// ----------------------------------------------------------------------------
+#if wxUSE_DEFERRED_SIZING
+void wxChoice::MSWEndDeferWindowPos()
+{
+    // we can only set the height of the choice itself now as it is reset to
+    // default every time the control is resized
+    MSWUpdateVisibleHeight();

 
 

-void wxChoice::UpdateVisibleHeight()
+    wxChoiceBase::MSWEndDeferWindowPos();
+}
+#endif // wxUSE_DEFERRED_SIZING
+
+void wxChoice::MSWUpdateDropDownHeight()

 {
     // be careful to not change the width here
 {
     // be careful to not change the width here

-    DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING);
+    DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y,
+              wxSIZE_USE_EXISTING);

 }
 
 void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 }
 
 void wxChoice::DoMoveWindow(int x, int y, int width, int height)


@@ -493,115 +511,191 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 
 void wxChoice::DoGetSize(int *w, int *h) const
 {
 
 void wxChoice::DoGetSize(int *w, int *h) const
 {

+    wxControl::DoGetSize(w, h);
+

     // this is weird: sometimes, the height returned by Windows is clearly the
     // total height of the control including the drop down list -- but only
     // this is weird: sometimes, the height returned by Windows is clearly the
     // total height of the control including the drop down list -- but only

-    // sometimes, and normally it isn't... I have no idea about what to do with
-    // this
-    wxControl::DoGetSize(w, h);
+    // sometimes, and sometimes it isn't so work around this here by using our
+    // own stored value if we have it
+    if ( h && m_heightOwn != wxDefaultCoord )
+        *h = m_heightOwn;

 }
 
 void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {
 }
 
 void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {

-    int heightOrig = height;
+    const int heightBest = GetBestSize().y;
+
+    // we need the real height below so get the current one if it's not given
+    if ( height == wxDefaultCoord )
+    {
+        // height not specified, use the same as before
+        DoGetSize(NULL, &height);
+    }
+    else if ( height == heightBest )
+    {
+        // we don't need to manually manage our height, let the system use the
+        // default one
+        m_heightOwn = wxDefaultCoord;
+    }
+    else // non-default height specified
+    {
+        // set our new own height but be careful not to make it too big: the
+        // native control apparently stores it as a single byte and so setting
+        // own height to 256 pixels results in default height being used (255
+        // is still ok)
+        m_heightOwn = height;
+
+        if ( m_heightOwn > UCHAR_MAX )
+            m_heightOwn = UCHAR_MAX;
+        // nor too small: see MSWUpdateVisibleHeight()
+        else if ( m_heightOwn < COMBO_HEIGHT_ADJ )
+            m_heightOwn = COMBO_HEIGHT_ADJ;
+    }
+

 
     // the height which we must pass to Windows should be the total height of
     // the control including the drop down list while the height given to us
 
     // the height which we must pass to Windows should be the total height of
     // the control including the drop down list while the height given to us

-    // is, of course, just the height of the permanently visible part of it
-    if ( height != wxDefaultCoord )
+    // is, of course, just the height of the permanently visible part of it so
+    // add the drop down height to it
+
+    // don't make the drop down list too tall, arbitrarily limit it to 30
+    // items max and also don't make it too small if it's currently empty
+    size_t nItems = GetCount();
+    if (!HasFlag(wxCB_SIMPLE))

     {
     {

-        int w, h;
-        DoGetSize(&w, &h);
-        
-        // Don't change the height if it's already this size
-        if (h == height)
-        {
-            height = -1;
-        }
-        else
-        {
-            // don't make the drop down list too tall, arbitrarily limit it to 40
-            // items max and also don't leave it empty
-            size_t nItems = GetCount();
-            if ( !nItems )
-                nItems = 9;
-            else if ( nItems > 24 )
-                nItems = 24;
-            
-            // add space for the drop down list
-            const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
-            height += hItem*(nItems + 1);
-        }
+        if ( !nItems )
+            nItems = 9;
+        else if ( nItems > 30 )
+            nItems = 30;

     }
     }

+
+    const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+    int heightWithItems = 0;
+    if (!HasFlag(wxCB_SIMPLE))
+        // The extra item (" + 1") is required to prevent a vertical
+        // scrollbar from appearing with comctl32.dll versions earlier
+        // than 6.0 (such as found in Win2k).
+        heightWithItems = height + hItem*(nItems + 1);

     else
     else

+        heightWithItems = SetHeightSimpleComboBox(nItems);
+
+
+    // do resize the native control
+    wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags);
+
+
+    // make the control itself of the requested height: notice that this
+    // must be done after changing its size or it has no effect (apparently
+    // the height is reset to default during the control layout) and that it's
+    // useless to do it when using the deferred sizing -- in this case it
+    // will be done from MSWEndDeferWindowPos()
+#if wxUSE_DEFERRED_SIZING
+    if ( m_pendingSize == wxDefaultSize )

     {
     {

-        // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
-        // wxGetWindowRect() to determine the current height of the combobox,
-        // and then again sets the combobox's height to that value. Unfortunately,
-        // wxGetWindowRect doesn't include the dropdown list's height (at least
-        // on Win2K), so this would result in a combobox with dropdown height of
-        // 1 pixel. We have to determine the default height ourselves and call
-        // wxControl with that value instead.
-        int w, h;
-        RECT r;
-        DoGetSize(&w, &h);
-        if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0 && r.bottom < 30000)
-        {
-            height = h + r.bottom - r.top;
-        }
+        // not using deferred sizing, update it immediately
+        MSWUpdateVisibleHeight();

     }
     }

-
-    wxControl::DoSetSize(x, y, width, height, sizeFlags);
-
-    // I'm commenting this out since the code appears to make choices
-    // and comboxes too high when they have associated sizers. I'm sure this
-    // is not the end of the story, which is why I'm leaving it #if'ed out for
-    // now. JACS.
-#if 0
-    // if the height specified for the visible part of the control is
-    // different from the current one, we need to change it separately
-    // as it is not affected by normal WM_SETSIZE
-    if ( height != wxDefaultCoord )
+    else // in the middle of deferred sizing

     {
     {

-        const int delta = heightOrig - GetSize().y;
-        if ( delta )
-        {
-            int h = ::SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
-            SendMessage(GetHwnd(), CB_SETITEMHEIGHT, (WPARAM)-1, h + delta);
-        }
+        // we need to report the size of the visible part of the control back
+        // in GetSize() and not height stored by DoSetSize() in m_pendingSize
+        m_pendingSize = wxSize(width, height);

     }
     }

-#else
-    wxUnusedVar(heightOrig);
-#endif
+#else // !wxUSE_DEFERRED_SIZING
+    // always update the visible height immediately
+    MSWUpdateVisibleHeight();
+#endif // wxUSE_DEFERRED_SIZING

 }
 
 wxSize wxChoice::DoGetBestSize() const
 {
 }
 
 wxSize wxChoice::DoGetBestSize() const
 {

-    // find the widest string
-    int wChoice = 0;
-    const size_t nItems = GetCount();
-    for ( size_t i = 0; i < nItems; i++ )
+    // The base version returns the size of the largest string
+    return GetSizeFromTextSize(wxChoiceBase::DoGetBestSize().x);
+}
+
+int wxChoice::SetHeightSimpleComboBox(int nItems) const
+{
+    int cx, cy;
+    wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
+    int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
+    return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
+}
+
+wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const
+{
+    int cHeight = GetCharHeight();
+
+    // We are interested in the difference of sizes between the whole control
+    // and its child part. I.e. arrow, separators, etc.
+    wxSize tsize(xlen, 0);
+
+    // FIXME-VC6: Only VC6 needs this guard, see WINVER definition in
+    //            include/wx/msw/wrapwin.h
+#if defined(WINVER) && WINVER >= 0x0500
+    WinStruct<COMBOBOXINFO> info;
+    if ( MSWGetComboBoxInfo(&info) )

     {
     {

-        int wLine;
-        GetTextExtent(GetString(i), &wLine, NULL);
-        if ( wLine > wChoice )
-            wChoice = wLine;
+        tsize.x += info.rcItem.left + info.rcButton.right - info.rcItem.right
+                    + info.rcItem.left + 3; // right and extra margins

     }
     }

+    else // Just use some rough approximation.
+#endif // WINVER >= 0x0500
+    {
+        tsize.x += 4*cHeight;
+    }
+
+    // set height on our own
+    if( HasFlag( wxCB_SIMPLE ) )
+        tsize.y = SetHeightSimpleComboBox(GetCount());
+    else
+        tsize.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cHeight);
+
+    // Perhaps the user wants something different from CharHeight
+    if ( ylen > 0 )
+        tsize.IncBy(0, ylen - cHeight);
+
+    return tsize;
+}
+
+// ----------------------------------------------------------------------------
+// Popup operations
+// ----------------------------------------------------------------------------
+
+void wxChoice::MSWDoPopupOrDismiss(bool show)
+{
+    wxASSERT_MSG( !HasFlag(wxCB_SIMPLE),
+                  wxT("can't popup/dismiss the list for simple combo box") );
+
+    // we *must* set focus to the combobox before showing or hiding the drop
+    // down as without this we get WM_LBUTTONDOWN messages with invalid HWND
+    // when hiding it (whether programmatically or manually) resulting in a
+    // crash when we pass them to IsDialogMessage()
+    //
+    // this can be seen in the combo page of the widgets sample under Windows 7
+    SetFocus();
+
+    ::SendMessage(GetHwnd(), CB_SHOWDROPDOWN, show, 0);
+}

 
 

-    // give it some reasonable default value if there are no strings in the
-    // list
-    if ( wChoice == 0 )
-        wChoice = 100;
+bool wxChoice::Show(bool show)
+{
+    if ( !wxChoiceBase::Show(show) )
+        return false;

 
 

-    // the combobox should be slightly larger than the widest string
-    wChoice += 5*GetCharWidth();
+    // When hiding the combobox, we also need to hide its popup part as it
+    // doesn't happen automatically.
+    if ( !show && ::SendMessage(GetHwnd(), CB_GETDROPPEDSTATE, 0, 0) )
+        MSWDoPopupOrDismiss(false);

 
 

-    wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
-    CacheBestSize(best);
-    return best;
+    return true;

 }
 
 }
 

+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+

 WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
     switch ( nMsg )
 WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
     switch ( nMsg )


@@ -646,9 +740,7 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
     /*
         The native control provides a great variety in the events it sends in
         the different selection scenarios (undoubtedly for greater amusement of
     /*
         The native control provides a great variety in the events it sends in
         the different selection scenarios (undoubtedly for greater amusement of

-        the programmers using it). For the reference, here are the cases when
-        the final selection is accepted (things are quite interesting when it
-        is cancelled too):
+        the programmers using it). Here are the different cases:

 
         A. Selecting with just the arrows without opening the dropdown:
             1. CBN_SELENDOK
 
         A. Selecting with just the arrows without opening the dropdown:
             1. CBN_SELENDOK


@@ -670,6 +762,12 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
         Admire the different order of messages in all of those cases, it must
         surely have taken a lot of effort to Microsoft developers to achieve
         such originality.
         Admire the different order of messages in all of those cases, it must
         surely have taken a lot of effort to Microsoft developers to achieve
         such originality.

+
+        Additionally, notice that CBN_SELENDCANCEL doesn't seem to actually
+        cancel anything, if we get CBN_SELCHANGE before it, as it happens in
+        the case (B), the selection is still accepted. This doesn't make much
+        sense and directly contradicts MSDN documentation but is how the native
+        comboboxes behave and so we do the same thing.

      */
     switch ( param )
     {
      */
     switch ( param )
     {


@@ -682,47 +780,40 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
             break;
 
         case CBN_CLOSEUP:
             break;
 
         case CBN_CLOSEUP:

-            // if the selection was accepted by the user, it should have been
-            // reset to wxID_NONE by CBN_SELENDOK, otherwise the selection was
-            // cancelled and we must restore the old one
-            if ( m_lastAcceptedSelection != wxID_NONE )
+            if ( m_pendingSelection != wxID_NONE )

             {
             {

-                SetSelection(m_lastAcceptedSelection);
-                m_lastAcceptedSelection = wxID_NONE;
+                // This can only happen in the case (B), so set the item
+                // selected in the drop down as our real selection.
+                SendSelectionChangedEvent(wxEVT_CHOICE);
+                m_pendingSelection = wxID_NONE;

             }
             break;
 
         case CBN_SELENDOK:
             }
             break;
 
         case CBN_SELENDOK:

-            // reset it to prevent CBN_CLOSEUP from undoing the selection (it's
-            // ok to reset it now as GetCurrentSelection() will now return the
-            // same thing anyhow)
-            m_lastAcceptedSelection = wxID_NONE;
+            // Reset the variables to prevent CBN_CLOSEUP from doing anything,
+            // it's not needed if we do get CBN_SELENDOK.
+            m_lastAcceptedSelection =
+            m_pendingSelection = wxID_NONE;

 
 

-            {
-                const int n = GetSelection();
-
-                wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
-                event.SetInt(n);
-                event.SetEventObject(this);
-
-                if ( n > -1 )
-                {
-                    event.SetString(GetStringSelection());
-                    if ( HasClientObjectData() )
-                        event.SetClientObject( GetClientObject(n) );
-                    else if ( HasClientUntypedData() )
-                        event.SetClientData( GetClientData(n) );
-                }
-
-                ProcessCommand(event);
-            }
+            SendSelectionChangedEvent(wxEVT_CHOICE);

             break;
 
             break;
 

-        // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection
-        // valid and the selection will be undone in CBN_CLOSEUP above
+        case CBN_SELCHANGE:
+            // If we get this event after CBN_SELENDOK, i.e. cases (A) or (C)
+            // above, we don't have anything to do. But in the case (B) we need
+            // to remember that the selection should really change once the
+            // drop down is closed.
+            if ( m_lastAcceptedSelection != wxID_NONE )
+                m_pendingSelection = GetCurrentSelection();
+            break;

 
 

-        // don't handle CBN_SELCHANGE neither, we don't want to generate events
-        // while the dropdown is opened -- but do add it if we ever need this
+        case CBN_SELENDCANCEL:
+            // Do not reset m_pendingSelection here -- it would make sense but,
+            // as described above, native controls keep the selection even when
+            // closing the drop down by pressing Escape or TAB, so conform to
+            // their behaviour.
+            m_lastAcceptedSelection = wxID_NONE;
+            break;

 
         default:
             return false;
 
         default:
             return false;


@@ -733,7 +824,7 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 
 WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
 {
 
 WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
 {

-    if ( !IsEnabled() )
+    if ( !IsThisEnabled() )

         return MSWControlColorDisabled(hDC);
 
     return wxChoiceBase::MSWControlColor(hDC, hWnd);
         return MSWControlColorDisabled(hDC);
 
     return wxChoiceBase::MSWControlColor(hDC, hWnd);