X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/11e62fe658531aaa2891351f19bd0a4c076717ae..d7b284e5c62523c9a43e26977672b4ff7c5b8981:/src/msw/choice.cpp diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp index b643d1d1cb..be319a9132 100644 --- a/src/msw/choice.cpp +++ b/src/msw/choice.cpp @@ -239,7 +239,7 @@ int wxChoice::DoAppend(const wxString& item) int wxChoice::DoInsert(const wxString& item, 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 ) @@ -258,7 +258,7 @@ int wxChoice::DoInsert(const wxString& item, int pos) void wxChoice::Delete(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() ) { @@ -326,9 +326,9 @@ void wxChoice::SetSelection(int n) // string list functions // ---------------------------------------------------------------------------- -int wxChoice::GetCount() const +size_t wxChoice::GetCount() const { - return (int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0); + return (size_t)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0); } int wxChoice::FindString(const wxString& s, bool bCase) const @@ -336,8 +336,8 @@ 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++ ) + size_t count = GetCount(); + for ( size_t i = 0; i < count; i++ ) { // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too if ( GetString(i).IsSameAs(s, bCase) ) @@ -350,8 +350,8 @@ int wxChoice::FindString(const wxString& s, bool bCase) const //passed to SendMessage, so we have to do it ourselves in that case if ( s.empty() ) { - int count = GetCount(); - for ( int i = 0; i < count; i++ ) + size_t count = GetCount(); + for ( size_t i = 0; i < count; i++ ) { if ( GetString(i).empty() ) return i; @@ -376,8 +376,7 @@ int wxChoice::FindString(const wxString& s, bool bCase) const void wxChoice::SetString(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 @@ -507,10 +506,13 @@ 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 @@ -524,8 +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, @@ -533,12 +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; } } @@ -633,20 +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(); @@ -665,10 +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)