Don't overwrite status message when restoring it if it changed.

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

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 3389cf37072aa11509ca080df8a6fd10fe904c0f..55f5106096f40a516c45c79c3f9db2dc27f52746 100644 (file)
--- 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
 // Purpose:     wxChoice
 // Author:      Julian Smart
 // Modified by: Vadim Zeitlin to derive from wxChoiceBase


@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // 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"
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 


@@ -28,10 +24,11 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

-#if wxUSE_CHOICE
+#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/log.h"
     #include "wx/brush.h"
     #include "wx/utils.h"
     #include "wx/log.h"
     #include "wx/brush.h"


@@ -41,27 +38,61 @@
 #include "wx/msw/private.h"
 
 #if wxUSE_EXTENDED_RTTI
 #include "wx/msw/private.h"
 
 #if wxUSE_EXTENDED_RTTI

-IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControl,"wx/checkbox.h")
-
-WX_BEGIN_PROPERTIES_TABLE(wxChoice)
-    // TODO DELEGATES
-       WX_PROPERTY( Font , wxFont , SetFont , GetFont  , , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-    WX_PROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-       WX_PROPERTY( Selection ,int, SetSelection, GetSelection, , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
-WX_END_PROPERTIES_TABLE()
-
-WX_BEGIN_HANDLERS_TABLE(wxChoice)
-WX_END_HANDLERS_TABLE()
-
-WX_CONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size ) 
+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, wxControlWithItems,"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
 #else

-IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
+IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)

 #endif
 /*
 #endif
 /*

-       TODO PROPERTIES
-               selection (long)
-               content (list)
-                       item
+    TODO PROPERTIES
+        selection (long)
+        content (list)
+            item

 */
 
 // ============================================================================
 */
 
 // ============================================================================


@@ -81,105 +112,186 @@ bool wxChoice::Create(wxWindow *parent,
                       const wxValidator& validator,
                       const wxString& name)
 {
                       const wxValidator& validator,
                       const wxString& name)
 {

-    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
-        return FALSE;
-
-    long msStyle = WS_CHILD | CBS_DROPDOWNLIST | WS_TABSTOP | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL /* | WS_CLIPSIBLINGS */;
-    if ( style & wxCB_SORT )
-        msStyle |= CBS_SORT;
-
-    if ( style & wxCLIP_SIBLINGS )
-        msStyle |= WS_CLIPSIBLINGS;
-
-

     // Experience shows that wxChoice vs. wxComboBox distinction confuses
     // quite a few people - try to help them
     wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
                   !(style & wxCB_READONLY) &&
                   !(style & wxCB_SIMPLE),
     // Experience shows that wxChoice vs. wxComboBox distinction confuses
     // quite a few people - try to help them
     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);
+}
+
+bool wxChoice::CreateAndInit(wxWindow *parent,
+                             wxWindowID id,
+                             const wxPoint& pos,
+                             const wxSize& size,
+                             int n, const wxString choices[],
+                             long style,
+                             const wxValidator& validator,
+                             const wxString& name)
+{
+    // initialize wxControl
+    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
+        return false;

 
 

-    if ( !MSWCreateControl(wxT("COMBOBOX"), msStyle) )
-        return FALSE;
+    // now create the real HWND
+    if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
+        return false;

 
 

-    // A choice/combobox normally has a white background (or other, depending
-    // on global settings) rather than inheriting the parent's background colour.
+
+    // 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));
 
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 

+    // initialize the controls contents

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

-    SetSize(pos.x, pos.y, size.x, size.y);
+    // and now we may finally size the control properly (if needed)
+    SetInitialSize(size);

 
 

-    return TRUE;
+    return true;

 }
 
 }
 

-wxChoice::~wxChoice()
+void wxChoice::SetLabel(const wxString& label)

 {
 {

-    Free();
+    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);

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// adding/deleting items to/from the list
-// ----------------------------------------------------------------------------
+bool wxChoice::Create(wxWindow *parent,
+                      wxWindowID id,
+                      const wxPoint& pos,
+                      const wxSize& size,
+                      const wxArrayString& choices,
+                      long style,
+                      const wxValidator& validator,
+                      const wxString& name)
+{
+    wxCArrayString chs(choices);
+    return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
+                  style, validator, name);
+}

 
 

-int wxChoice::DoAppend(const wxString& item)
+bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg)

 {
 {

-    int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)item.c_str());
-    if ( n == CB_ERR )
+    MSG *msg = (MSG *) pMsg;
+
+    // if the dropdown list is visible, don't preprocess certain keys
+    if ( msg->message == WM_KEYDOWN
+        && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) )

     {
     {

-        wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
+        if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0))
+        {
+            return false;
+        }

     }
 
     }
 

-    return n;
+    return wxControl::MSWShouldPreProcessMessage(pMsg);

 }
 
 }
 

-int wxChoice::DoInsert(const wxString& item, int pos)
+WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const

 {
 {

-    wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
-    wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
+    // we never have an external border
+    WXDWORD msStyle = wxControl::MSWGetStyle
+                      (
+                        (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
+                      );
+
+    // WS_CLIPSIBLINGS is useful with wxChoice and doesn't seem to result in
+    // any problems
+    msStyle |= WS_CLIPSIBLINGS;
+
+    // wxChoice-specific styles
+    msStyle |= CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL;
+    if ( style & wxCB_SORT )
+        msStyle |= CBS_SORT;

 
 

-    int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LONG)item.c_str());
-    if ( n == CB_ERR )
-    {
-        wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)"));
-    }
+    return msStyle;
+}

 
 

-    return n;
+wxChoice::~wxChoice()
+{
+    Clear();

 }
 
 }
 

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

 {
 {

-    wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") );
+    MSWAllocStorage(items, CB_INITSTORAGE);
+
+    const bool append = pos == GetCount();

 
 

-    if ( HasClientObjectData() )
+    // 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 )

     {
     {

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

     }
 
     }
 

-    SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+    // 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::Clear()
+void wxChoice::DoDeleteOneItem(unsigned int n)

 {
 {

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

 
 

-    SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+    SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
+
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
+
+    InvalidateBestSize();

 }
 
 }
 

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

 {
 {

-    if ( HasClientObjectData() )
-    {
-        size_t count = GetCount();
-        for ( size_t n = 0; n < count; n++ )
-        {
-            delete GetClientObject(n);
-        }
-    }
+    SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
+
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
+
+    InvalidateBestSize();

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -187,6 +299,17 @@ void wxChoice::Free()
 // ----------------------------------------------------------------------------
 
 int wxChoice::GetSelection() const
 // ----------------------------------------------------------------------------
 
 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);
 }
 {
     return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
 }


@@ -200,63 +323,82 @@ void wxChoice::SetSelection(int n)
 // string list functions
 // ----------------------------------------------------------------------------
 
 // 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.
 {
 #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
     {
         // 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
             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, (LPARAM)s.wx_str());
+
+       return pos == LB_ERR ? wxNOT_FOUND : pos;
+   }

 #endif // Watcom/!Watcom
 }
 
 #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 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);

 
     ::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, (LPARAM)s.wx_str() );

 
 

-    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);
+
+    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);
 


@@ -282,7 +424,7 @@ 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 )


@@ -291,7 +433,7 @@ 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 )
 {
     LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
     if ( rc == CB_ERR )


@@ -305,19 +447,47 @@ void* wxChoice::DoGetItemClientData( int n ) const
     return (void *)rc;
 }
 
     return (void *)rc;
 }
 

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

 {
 {

-    DoSetItemClientData(n, clientData);
+    if ( m_heightOwn != wxDefaultCoord )
+    {
+        ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT,
+                      (WPARAM)-1, m_heightOwn - COMBO_HEIGHT_ADJ);
+    }

 }
 
 }
 

-wxClientData* wxChoice::DoGetItemClientObject( int n ) const
+#if wxUSE_DEFERRED_SIZING
+void wxChoice::MSWEndDeferWindowPos()

 {
 {

-    return (wxClientData *)DoGetItemClientData(n);
+    // we can only set the height of the choice itself now as it is reset to
+    // default every time the control is resized
+    MSWUpdateVisibleHeight();
+
+    wxChoiceBase::MSWEndDeferWindowPos();

 }
 }

+#endif // wxUSE_DEFERRED_SIZING

 
 

-// ----------------------------------------------------------------------------
-// wxMSW specific helpers
-// ----------------------------------------------------------------------------
+void wxChoice::MSWUpdateDropDownHeight()
+{
+    // be careful to not change the width here
+    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)
 {


@@ -337,29 +507,96 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height)
     wxControl::DoMoveWindow(x, y, width, height);
 }
 
     wxControl::DoMoveWindow(x, y, width, 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 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,
 void wxChoice::DoSetSize(int x, int y,

-                         int width, int WXUNUSED(height),
+                         int width, int height,

                          int sizeFlags)
 {
                          int sizeFlags)
 {

-    // Ignore height parameter because height doesn't mean 'initially
-    // displayed' height, it refers to the drop-down menu as well. The
-    // wxWindows interpretation is different; also, getting the size returns
-    // the _displayed_ size (NOT the drop down menu size) so
-    // setting-getting-setting size would not work.
+    // we need the real height below so get the current one if it's not given
+    if ( height != wxDefaultCoord && height != GetBestSize().y )
+    {
+        // 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;
+    }
+    else // height not specified
+    {
+        DoGetSize(NULL, &height);
+    }
+
+
+    // 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 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 ( !nItems )
+        nItems = 9;
+    else if ( nItems > 30 )
+        nItems = 30;
+
+    const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+    const int heightWithItems = height + hItem*nItems;
+
+
+    // do resize the native control
+    wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags);
+

 
 

-    wxControl::DoSetSize(x, y, width, -1, 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 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 )
+    {
+        // not using deferred sizing, update it immediately
+        MSWUpdateVisibleHeight();
+    }
+    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
 }
 
 wxSize wxChoice::DoGetBestSize() const
 {
     // find the widest string

-    int wLine;

     int wChoice = 0;
     int wChoice = 0;

-    int nItems = GetCount();
-    for ( int i = 0; i < nItems; i++ )
+    const unsigned int nItems = GetCount();
+    for ( unsigned int i = 0; i < nItems; i++ )

     {
     {

-        wxString str(GetString(i));
-        GetTextExtent(str, &wLine, NULL);
+        int wLine;
+        GetTextExtent(GetString(i), &wLine, NULL);

         if ( wLine > wChoice )
             wChoice = wLine;
     }
         if ( wLine > wChoice )
             wChoice = wLine;
     }


@@ -369,33 +606,52 @@ wxSize wxChoice::DoGetBestSize() const
     if ( wChoice == 0 )
         wChoice = 100;
 
     if ( wChoice == 0 )
         wChoice = 100;
 

-    // the combobox should be larger than the widest string
-    int cx, cy;
-    wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
+    // the combobox should be slightly larger than the widest string
+    wChoice += 5*GetCharWidth();

 
 

-    wChoice += 5*cx;
-
-    // Choice drop-down list depends on number of items (limited to 10)
-    size_t nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
-    int hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*nStrings;
-
-    return wxSize(wChoice, hChoice);
+    wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+    CacheBestSize(best);
+    return best;

 }
 
 }
 

-long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+// ----------------------------------------------------------------------------
+// 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);
     }
 
     return wxWindow::MSWWindowProc(nMsg, wParam, lParam);


@@ -403,47 +659,97 @@ long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 
 bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 {
 
 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). For the reference, here are the cases when
+        the final selection is accepted (things are quite interesting when it
+        is cancelled too):
+
+        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.
+     */
+    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 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 )
+            {
+                SetSelection(m_lastAcceptedSelection);
+                m_lastAcceptedSelection = wxID_NONE;
+            }
+            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;
+
+            {
+                const int n = GetSelection();
+
+                wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
+                event.SetInt(n);
+                event.SetEventObject(this);
+
+                if ( n > -1 )
+                {
+                    event.SetString(GetStringSelection());
+                    InitCommandEventWithItems(event, n);
+                }
+
+                ProcessCommand(event);
+            }
+            break;
+
+        // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection
+        // valid and the selection will be undone in CBN_CLOSEUP above
+
+        // 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
+
+        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 ( !IsEnabled() )
+        return MSWControlColorDisabled(hDC);

 
 

-    return (WXHBRUSH)brush->GetResourceHandle();
+    return wxChoiceBase::MSWControlColor(hDC, hWnd);

 }
 
 }
 

-#endif // wxUSE_CHOICE
+#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)