X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b4bfa4522e2b7f88b555e98491135f8fff9a04de..3f4a2351e4c677c88c18ea812b609477adee7380:/src/msw/choice.cpp diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp index fc53d9298d..67feff0512 100644 --- a/src/msw/choice.cpp +++ b/src/msw/choice.cpp @@ -1,12 +1,12 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: choice.cpp +// Name: src/msw/choice.cpp // Purpose: wxChoice // Author: Julian Smart // Modified by: Vadim Zeitlin to derive from wxChoiceBase // Created: 04/01/98 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) Julian Smart +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -17,10 +17,6 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "choice.h" -#endif - // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -28,10 +24,11 @@ #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/log.h" #include "wx/brush.h" @@ -40,7 +37,63 @@ #include "wx/msw/private.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 +*/ // ============================================================================ // implementation @@ -59,17 +112,6 @@ bool wxChoice::Create(wxWindow *parent, 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) && @@ -78,21 +120,93 @@ bool wxChoice::Create(wxWindow *parent, _T("this style flag is ignored by wxChoice, you ") _T("probably want to use a wxComboBox") ); - if ( !MSWCreateControl(wxT("COMBOBOX"), msStyle) ) - return FALSE; + 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; + + // 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)); + // initialize the controls contents 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) + SetBestSize(size); + + return true; +} - return TRUE; +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); +} + +bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg) +{ + 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) ) + { + if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0)) + { + return false; + } + } + + return wxControl::MSWShouldPreProcessMessage(pMsg); +} + +WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const +{ + // 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; + + return msStyle; } wxChoice::~wxChoice() @@ -106,18 +220,46 @@ wxChoice::~wxChoice() int wxChoice::DoAppend(const wxString& item) { - int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LONG)item.c_str()); + int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LPARAM)item.c_str()); if ( n == CB_ERR ) { 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(); + } + InvalidateBestSize(); return n; } -void wxChoice::Delete(int n) +int wxChoice::DoInsert(const wxString& item, unsigned int pos) { - wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") ); + wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list")); + wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index")); + + int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str()); + if ( n == CB_ERR ) + { + wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)")); + } + else // ok + { + if ( !IsFrozen() ) + UpdateVisibleHeight(); + } + + InvalidateBestSize(); + return n; +} + +void wxChoice::Delete(unsigned int n) +{ + wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") ); if ( HasClientObjectData() ) { @@ -125,6 +267,11 @@ void wxChoice::Delete(int n) } SendMessage(GetHwnd(), CB_DELETESTRING, n, 0); + + if ( !IsFrozen() ) + UpdateVisibleHeight(); + + InvalidateBestSize(); } void wxChoice::Clear() @@ -132,14 +279,19 @@ void wxChoice::Clear() Free(); SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0); + + if ( !IsFrozen() ) + UpdateVisibleHeight(); + + InvalidateBestSize(); } void wxChoice::Free() { if ( HasClientObjectData() ) { - size_t count = GetCount(); - for ( size_t n = 0; n < count; n++ ) + unsigned int count = GetCount(); + for ( unsigned int n = 0; n < count; n++ ) { delete GetClientObject(n); } @@ -151,6 +303,17 @@ 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); } @@ -164,50 +327,101 @@ 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, (LPARAM)s.c_str()); + + 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 0 ) + { + if ( ::SendMessage + ( + GetHwnd(), + CB_GETLBTEXT, + n, + (LPARAM)(wxChar *)wxStringBuffer(str, len) + ) == CB_ERR ) + { wxLogLastError(wxT("SendMessage(CB_GETLBTEXT)")); } - str.UngetWriteBuf(); } return str; @@ -217,15 +431,16 @@ 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 ) + if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA, + n, (LPARAM)clientData) == CB_ERR ) { wxLogLastError(wxT("CB_SETITEMDATA")); } } -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 ) @@ -239,12 +454,12 @@ void* wxChoice::DoGetItemClientData( int n ) const return (void *)rc; } -void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData ) +void wxChoice::DoSetItemClientObject(unsigned int n, wxClientData* clientData) { DoSetItemClientData(n, clientData); } -wxClientData* wxChoice::DoGetItemClientObject( int n ) const +wxClientData* wxChoice::DoGetItemClientObject(unsigned int n) const { return (wxClientData *)DoGetItemClientData(n); } @@ -253,6 +468,12 @@ wxClientData* wxChoice::DoGetItemClientObject( int n ) const // wxMSW specific helpers // ---------------------------------------------------------------------------- +void wxChoice::UpdateVisibleHeight() +{ + // 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) { // here is why this is necessary: if the width is negative, the combobox @@ -271,28 +492,140 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height) wxControl::DoMoveWindow(x, y, width, height); } +void wxChoice::DoGetSize(int *w, int *h) const +{ + // 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); +} + void wxChoice::DoSetSize(int x, int y, - int width, int WXUNUSED(height), + int width, int height, 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. - wxControl::DoSetSize(x, y, width, -1, sizeFlags); + int heightOrig = 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 + if ( height != wxDefaultCoord ) + { + // 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); + } + else + { + // 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) + { + height = h + r.bottom - r.top; + } + } + + wxControl::DoSetSize(x, y, width, height, sizeFlags); + + // If we're storing a pending size, make sure we store + // the original size for reporting back to the app. + if (m_pendingSize != wxDefaultSize) + m_pendingSize = wxSize(width, heightOrig); + + // This solution works on XP, but causes choice/combobox lists to be + // too short on W2K and earlier. +#if 0 + int widthCurrent, heightCurrent; + DoGetSize(&widthCurrent, &heightCurrent); + + // 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 && height != heightCurrent ) + { + // don't make the drop down list too tall, arbitrarily limit it to 40 + // items max and also don't leave it empty + unsigned int 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); + } + else // keep the same height as now + { + // normally wxWindow::DoSetSize() checks if we set the same size as the + // window already has and does nothing in this case, but for us the + // check fails as the size we pass to it includes the dropdown while + // the size returned by our GetSize() does not, so test if the size + // didn't really change ourselves here + if ( width == wxDefaultCoord || width == widthCurrent ) + { + // size doesn't change, what about position? + int xCurrent, yCurrent; + DoGetPosition(&xCurrent, &yCurrent); + const bool defMeansUnchanged = !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE); + if ( ((x == wxDefaultCoord && defMeansUnchanged) || x == xCurrent) + && + ((y == wxDefaultCoord && defMeansUnchanged) || y == yCurrent) ) + { + // nothing changes, nothing to do + return; + } + } + + // 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. + // + // Also notice that sometimes CB_GETDROPPEDCONTROLRECT seems to return + // wildly incorrect values (~32000) which looks like a bug in it, just + // ignore them in this case + RECT r; + if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) + && r.bottom < 30000 ) + { + height = heightCurrent + r.bottom - r.top; + } + } + + wxControl::DoSetSize(x, y, width, height, sizeFlags); +#endif } wxSize wxChoice::DoGetBestSize() const { // find the widest string - int wLine; 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; } @@ -302,33 +635,48 @@ wxSize wxChoice::DoGetBestSize() const if ( wChoice == 0 ) wChoice = 100; - // the combobox should be larger than the widest string - int cx, cy; - wxGetCharSize(GetHWND(), &cx, &cy, &GetFont()); - - 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; + // the combobox should be slightly larger than the widest string + wChoice += 5*GetCharWidth(); - 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) +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); @@ -336,66 +684,97 @@ long 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). 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), -#if wxUSE_CTL3D - WXUINT message, - WXWPARAM wParam, - WXLPARAM lParam -#else - WXUINT WXUNUSED(message), - WXWPARAM WXUNUSED(wParam), - WXLPARAM WXUNUSED(lParam) -#endif - ) +WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd) { -#if wxUSE_CTL3D - if ( m_useCtl3D ) - { - HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam); - return (WXHBRUSH) hbrush; - } -#endif // wxUSE_CTL3D - - HDC hdc = (HDC)pDC; - if (GetParent()->GetTransparentBackground()) - SetBkMode(hdc, TRANSPARENT); - else - SetBkMode(hdc, OPAQUE); - - 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__)