X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/94500b32849a55cb4e07f3f4d6b095090522adac..3b69b47ca6e1a595bd357f849d46b10d98444fce:/src/msw/choice.cpp diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp index 31b0b5f46c..6319f4ae2e 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" @@ -240,10 +236,10 @@ int wxChoice::DoAppend(const wxString& item) return n; } -int wxChoice::DoInsert(const wxString& item, int pos) +int wxChoice::DoInsert(const wxString& item, unsigned int pos) { wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list")); - wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index")); + wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index")); int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str()); if ( n == CB_ERR ) @@ -260,9 +256,9 @@ int wxChoice::DoInsert(const wxString& item, int pos) return n; } -void wxChoice::Delete(int n) +void wxChoice::Delete(unsigned int n) { - wxCHECK_RET( n < GetCount(), wxT("invalid item index in wxChoice::Delete") ); + wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") ); if ( HasClientObjectData() ) { @@ -293,8 +289,8 @@ 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); } @@ -330,21 +326,21 @@ 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; } @@ -354,29 +350,33 @@ int wxChoice::FindString(const wxString& s) const //passed to SendMessage, so we have to do it ourselves in that case if ( s.empty() ) { - int count = GetCount(); - for ( int i = 0; i < count; i++ ) - { - if ( GetString(i).empty() ) - return i; - } - - return wxNOT_FOUND; + 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()); + int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT, + (WPARAM)-1, (LPARAM)s.c_str()); - return pos == LB_ERR ? wxNOT_FOUND : pos; + 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 @@ -404,7 +404,7 @@ void wxChoice::SetString(int n, const wxString& s) InvalidateBestSize(); } -wxString wxChoice::GetString(int n) const +wxString wxChoice::GetString(unsigned int n) const { int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0); @@ -430,7 +430,7 @@ 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 ) @@ -439,7 +439,7 @@ 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 ) @@ -453,12 +453,12 @@ 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); } @@ -506,14 +506,17 @@ void wxChoice::DoSetSize(int x, int y, { int heightOrig = height; + 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 ) + 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 - size_t nItems = GetCount(); + unsigned int nItems = GetCount(); if ( !nItems ) nItems = 9; else if ( nItems > 24 ) @@ -523,8 +526,28 @@ void wxChoice::DoSetSize(int x, int y, const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0); height += hItem*(nItems + 1); } - else + 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, @@ -532,12 +555,15 @@ void wxChoice::DoSetSize(int x, int y, // 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; + // + // 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; - DoGetSize(&w, &h); - if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0) + if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) + && r.bottom < 30000 ) { - height = h + r.bottom - r.top; + height = heightCurrent + r.bottom - r.top; } } @@ -569,8 +595,8 @@ wxSize wxChoice::DoGetBestSize() const { // find the widest string int wChoice = 0; - const size_t nItems = GetCount(); - for ( size_t i = 0; i < nItems; i++ ) + const unsigned int nItems = GetCount(); + for ( unsigned int i = 0; i < nItems; i++ ) { int wLine; GetTextExtent(GetString(i), &wLine, NULL); @@ -632,20 +658,61 @@ WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) { + /* + The native control provides a great variety in the events it sends in + the different selection scenarios (undoubtedly for greater amusement of + the 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 ) { case CBN_DROPDOWN: - // we don't want to track selection using CB_GETCURSEL while the - // dropdown is opened + // 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: - // it should be safe to use CB_GETCURSEL again - m_lastAcceptedSelection = wxID_NONE; + // 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_SELCHANGE: + 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(); @@ -664,10 +731,19 @@ bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) ProcessCommand(event); } - return true; + 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 false; + return true; } WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd) @@ -679,4 +755,3 @@ WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd) } #endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__) -