X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ef0368834fd9f80de27e1449cfdb767d59410a65..ad653fa23069c5d9378247084f03c9a718c3ad62:/src/msw/choice.cpp?ds=inline

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 9e9cde38ca..a14e549464 100644
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        choice.cpp
+// Name:        src/msw/choice.cpp
 // Purpose:     wxChoice
 // Author:      Julian Smart
 // Modified by: Vadim Zeitlin to derive from wxChoiceBase
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "choice.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -28,75 +24,21 @@
     #pragma hdrstop
 #endif
 
-#if wxUSE_CHOICE
+#if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
+
+#include "wx/choice.h"
 
 #ifndef WX_PRECOMP
-    #include "wx/choice.h"
     #include "wx/utils.h"
+    #include "wx/app.h"
     #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
@@ -120,8 +62,8 @@ bool wxChoice::Create(wxWindow *parent,
     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);
@@ -138,27 +80,35 @@ bool wxChoice::CreateAndInit(wxWindow *parent,
 {
     // initialize wxControl
     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
-        return FALSE;
+        return false;
 
     // now create the real HWND
-    if ( !MSWCreateControl(wxT("COMBOBOX"), _T(""), pos, size) )
-        return FALSE;
-
+    if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
+        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
-    for ( int i = 0; i < n; i++ )
-    {
-        Append(choices[i]);
-    }
+    Append(n, choices);
 
     // 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,
@@ -179,8 +129,9 @@ bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg)
 {
     MSG *msg = (MSG *) pMsg;
 
-    // don't preprocess "ESC" if combobox is dropped down
-    if ( msg->message == WM_KEYDOWN && msg->wParam == VK_ESCAPE )
+    // if the dropdown list is visible, don't preprocess certain keys
+    if ( msg->message == WM_KEYDOWN
+        && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) )
     {
         if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0))
         {
@@ -211,83 +162,129 @@ WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
     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 )
-    {
-        wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
-    }
-    else // ok
+    // 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 )
     {
-        // we need to refresh our size in order to have enough space for the
-        // newly added items
-        UpdateVisibleHeight();
+        s_triedToLoad = true;
+        wxLoadedDLL dllUser32("user32.dll");
+        wxDL_INIT_FUNC(s_pfn, GetComboBoxInfo, dllUser32);
     }
 
-    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((pos>=0) && (pos<=GetCount()), -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 )
     {
-        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();
+
     return n;
 }
 
-void wxChoice::Delete(int n)
+void wxChoice::DoDeleteOneItem(unsigned int n)
 {
-    wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
-
-    if ( HasClientObjectData() )
-    {
-        delete GetClientObject(n);
-    }
+    wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 
     SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
-    UpdateVisibleHeight();
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
+
+    InvalidateBestSize();
 }
 
-void wxChoice::Clear()
+void wxChoice::DoClear()
 {
-    Free();
-
     SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
 
-    UpdateVisibleHeight();
-}
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
 
-void wxChoice::Free()
-{
-    if ( HasClientObjectData() )
-    {
-        size_t count = GetCount();
-        for ( size_t n = 0; n < count; n++ )
-        {
-            delete GetClientObject(n);
-        }
-    }
+    InvalidateBestSize();
 }
 
 // ----------------------------------------------------------------------------
@@ -295,6 +292,17 @@ void wxChoice::Free()
 // ----------------------------------------------------------------------------
 
 int wxChoice::GetSelection() const
+{
+    // if m_lastAcceptedSelection is set, it means that the dropdown is
+    // currently shown and that we want to use the last "permanent" selection
+    // instead of whatever is under the mouse pointer currently
+    //
+    // otherwise, get the selection from the control
+    return m_lastAcceptedSelection == wxID_NONE ? GetCurrentSelection()
+                                                : m_lastAcceptedSelection;
+}
+
+int wxChoice::GetCurrentSelection() const
 {
     return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
 }
@@ -308,63 +316,91 @@ void wxChoice::SetSelection(int n)
 // string list functions
 // ----------------------------------------------------------------------------
 
-int wxChoice::GetCount() const
+unsigned int wxChoice::GetCount() const
 {
-    return (int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
+    return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
 }
 
-int wxChoice::FindString(const wxString& s) const
+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.
-    int count = GetCount();
-    for ( int 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
-        if ( GetString(i).IsSameAs(s, FALSE) )
+        if (GetString(i).IsSameAs(s, bCase))
             return i;
     }
 
     return wxNOT_FOUND;
 #else // !Watcom
-    int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
-                               (WPARAM)-1, (LPARAM)s.c_str());
-
-    return pos == LB_ERR ? wxNOT_FOUND : pos;
+   //TODO:  Evidently some MSW versions (all?) don't like empty strings
+   //passed to SendMessage, so we have to do it ourselves in that case
+   if ( s.empty() )
+   {
+       unsigned int count = GetCount();
+       for ( unsigned int i = 0; i < count; i++ )
+       {
+         if (GetString(i).empty())
+             return i;
+       }
+
+       return wxNOT_FOUND;
+   }
+   else if (bCase)
+   {
+       // back to base class search for not native search type
+       return wxItemContainerImmutable::FindString( s, bCase );
+   }
+   else
+   {
+       int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
+                                  (WPARAM)-1, wxMSW_CONV_LPARAM(s));
+
+       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( n >= 0 && n < GetCount(),
-                 wxT("invalid item index in wxChoice::SetString") );
+    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_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();
 }
 
-wxString wxChoice::GetString(int n) const
+wxString wxChoice::GetString(unsigned int n) const
 {
     int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
 
@@ -390,7 +426,7 @@ wxString wxChoice::GetString(int n) const
 // 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 )
@@ -399,10 +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);
-    if ( rc == CB_ERR )
+    if ( rc == CB_ERR && GetLastError() != ERROR_SUCCESS )
     {
         wxLogLastError(wxT("CB_GETITEMDATA"));
 
@@ -413,24 +449,46 @@ void* wxChoice::DoGetItemClientData( int n ) const
     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
-    DoSetSize(-1, -1, -1, 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)
@@ -453,97 +511,225 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 
 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
-    // 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)
 {
-    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
-    // is, of course, just the height of the permanently visible part of it
-    if ( height != -1 )
+    // 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))
     {
-        // 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 > 39 )
-            nItems = 39;
-
-        // add space for the drop down list
-        const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
-        height += hItem*(nItems + 1);
+        else if ( nItems > 30 )
+            nItems = 30;
     }
 
-    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 != -1 )
+    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
+        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 )
     {
-        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);
-        }
+        // not using deferred sizing, update it immediately
+        MSWUpdateVisibleHeight();
     }
-#endif
+    else // in the middle of deferred sizing
+    {
+        // 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 // !wxUSE_DEFERRED_SIZING
+    // always update the visible height immediately
+    MSWUpdateVisibleHeight();
+#endif // wxUSE_DEFERRED_SIZING
 }
 
 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
+// ----------------------------------------------------------------------------
 
-    // give it some reasonable default value if there are no strings in the
-    // list
-    if ( wChoice == 0 )
-        wChoice = 100;
+void wxChoice::MSWDoPopupOrDismiss(bool show)
+{
+    wxASSERT_MSG( !HasFlag(wxCB_SIMPLE),
+                  wxT("can't popup/dismiss the list for simple combo box") );
 
-    // the combobox should be slightly larger than the widest string
-    wChoice += 5*GetCharWidth();
+    // 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();
 
-    return wxSize(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+    ::SendMessage(GetHwnd(), CB_SHOWDROPDOWN, show, 0);
 }
 
+bool wxChoice::Show(bool show)
+{
+    if ( !wxChoiceBase::Show(show) )
+        return false;
+
+    // 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);
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+
 WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
-    if ( nMsg == WM_LBUTTONUP )
+    switch ( nMsg )
     {
-        int x = (int)LOWORD(lParam);
-        int y = (int)HIWORD(lParam);
-
-        // Ok, this is truly weird, but if a panel with a wxChoice loses the
-        // focus, then you get a *fake* WM_LBUTTONUP message with x = 65535 and
-        // y = 65535. Filter out this nonsense.
-        //
-        // VZ: I'd like to know how to reproduce this please...
-        if ( x == 65535 && y == 65535 )
-            return 0;
+        case WM_LBUTTONUP:
+            {
+                int x = (int)LOWORD(lParam);
+                int y = (int)HIWORD(lParam);
+
+                // Ok, this is truly weird, but if a panel with a wxChoice
+                // loses the focus, then you get a *fake* WM_LBUTTONUP message
+                // with x = 65535 and y = 65535. Filter out this nonsense.
+                //
+                // VZ: I'd like to know how to reproduce this please...
+                if ( x == 65535 && y == 65535 )
+                    return 0;
+            }
+            break;
+
+            // we have to handle both: one for the normal case and the other
+            // for readonly
+        case WM_CTLCOLOREDIT:
+        case WM_CTLCOLORLISTBOX:
+        case WM_CTLCOLORSTATIC:
+            {
+                WXHDC hdc;
+                WXHWND hwnd;
+                UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
+
+                WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd);
+                if ( hbr )
+                    return (WXLRESULT)hbr;
+                //else: fall through to default window proc
+            }
     }
 
     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
@@ -551,47 +737,97 @@ WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 
 bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 {
-    if ( param != CBN_SELCHANGE)
-    {
-        // "selection changed" is the only event we're after
-        return FALSE;
-    }
-
-    int n = GetSelection();
-    if (n > -1)
+    /*
+        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). Here are the different cases:
+
+        A. Selecting with just the arrows without opening the dropdown:
+            1. CBN_SELENDOK
+            2. CBN_SELCHANGE
+
+        B. Opening dropdown with F4 and selecting with arrows:
+            1. CBN_DROPDOWN
+            2. many CBN_SELCHANGE while changing selection in the list
+            3. CBN_SELENDOK
+            4. CBN_CLOSEUP
+
+        C. Selecting with the mouse:
+            1. CBN_DROPDOWN
+            -- no intermediate CBN_SELCHANGEs --
+            2. CBN_SELENDOK
+            3. CBN_CLOSEUP
+            4. CBN_SELCHANGE
+
+        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 )
     {
-        wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
-        event.SetInt(n);
-        event.SetEventObject(this);
-        event.SetString(GetStringSelection());
-        if ( HasClientObjectData() )
-            event.SetClientObject( GetClientObject(n) );
-        else if ( HasClientUntypedData() )
-            event.SetClientData( GetClientData(n) );
-        ProcessCommand(event);
+        case CBN_DROPDOWN:
+            // we use this value both because we don't want to track selection
+            // using CB_GETCURSEL while the dropdown is opened and because we
+            // need to reset the selection back to it if it's eventually
+            // cancelled by user
+            m_lastAcceptedSelection = GetCurrentSelection();
+            break;
+
+        case CBN_CLOSEUP:
+            if ( m_pendingSelection != 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:
+            // 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;
+
+            SendSelectionChangedEvent(wxEVT_CHOICE);
+            break;
+
+        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;
+
+        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;
     }
 
-    return TRUE;
+    return true;
 }
 
-WXHBRUSH wxChoice::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
-                               WXUINT WXUNUSED(message),
-                               WXWPARAM WXUNUSED(wParam),
-                               WXLPARAM WXUNUSED(lParam)
-     )
+WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
 {
-    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);
+    if ( !IsThisEnabled() )
+        return MSWControlColorDisabled(hDC);
 
-    return (WXHBRUSH)brush->GetResourceHandle();
+    return wxChoiceBase::MSWControlColor(hDC, hWnd);
 }
 
-#endif // wxUSE_CHOICE
+#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)