X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/51cdee11e0cbf47d78584822aaaf1eb975a992ea..d7b284e5c62523c9a43e26977672b4ff7c5b8981:/src/msw/choice.cpp diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp index 362f98ccb7..be319a9132 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" @@ -141,7 +137,7 @@ bool wxChoice::CreateAndInit(wxWindow *parent, return false; // now create the real HWND - if ( !MSWCreateControl(wxT("COMBOBOX"), _T(""), pos, size) ) + if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) ) return false; @@ -236,13 +232,14 @@ int wxChoice::DoAppend(const wxString& item) UpdateVisibleHeight(); } + InvalidateBestSize(); return n; } 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 ) @@ -255,12 +252,13 @@ int wxChoice::DoInsert(const wxString& item, int pos) UpdateVisibleHeight(); } + InvalidateBestSize(); return n; } 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() ) { @@ -271,6 +269,8 @@ void wxChoice::Delete(int n) if ( !IsFrozen() ) UpdateVisibleHeight(); + + InvalidateBestSize(); } void wxChoice::Clear() @@ -281,6 +281,8 @@ void wxChoice::Clear() if ( !IsFrozen() ) UpdateVisibleHeight(); + + InvalidateBestSize(); } void wxChoice::Free() @@ -300,6 +302,17 @@ 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); } @@ -313,21 +326,21 @@ 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) 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++ ) + 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, false) ) + if ( GetString(i).IsSameAs(s, bCase) ) return i; } @@ -335,31 +348,35 @@ int wxChoice::FindString(const wxString& s) const #else // !Watcom //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.size() == 0 ) + if ( s.empty() ) + { + size_t count = GetCount(); + for ( size_t i = 0; i < count; i++ ) + { + if ( GetString(i).empty() ) + return i; + } + + return wxNOT_FOUND; + } + else if (bCase) { - int count = GetCount(); - for ( int i = 0; i < count; i++ ) - { - if ( GetString(i).size() == 0 ) - return i; - } - - return wxNOT_FOUND; + // 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; + 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) { - 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 @@ -383,6 +400,8 @@ void wxChoice::SetString(int n, const wxString& s) DoSetItemClientData(n, data); } //else: it's already NULL by default + + InvalidateBestSize(); } wxString wxChoice::GetString(int n) const @@ -487,10 +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 @@ -504,6 +526,46 @@ void wxChoice::DoSetSize(int x, int y, 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); @@ -550,7 +612,9 @@ wxSize wxChoice::DoGetBestSize() const // the combobox should be slightly larger than the widest string wChoice += 5*GetCharWidth(); - return wxSize(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight())); + wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight())); + CacheBestSize(best); + return best; } WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) @@ -582,7 +646,7 @@ WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) WXHWND hwnd; UnpackCtlColor(wParam, lParam, &hdc, &hwnd); - WXHBRUSH hbr = MSWControlColor((WXHDC)hdc); + WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd); if ( hbr ) return (WXLRESULT)hbr; //else: fall through to default window proc @@ -594,36 +658,100 @@ WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) { - if ( param != CBN_SELCHANGE) + /* + 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 ) { - // "selection changed" is the only event we're after - return false; - } + 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; - int n = GetSelection(); - if (n > -1) - { - 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_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()); + if ( HasClientObjectData() ) + event.SetClientObject( GetClientObject(n) ); + else if ( HasClientUntypedData() ) + event.SetClientData( GetClientData(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; } -WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC) +WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd) { if ( !IsEnabled() ) return MSWControlColorDisabled(hDC); - return wxChoiceBase::MSWControlColorSolid(hDC); + return wxChoiceBase::MSWControlColor(hDC, hWnd); } #endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__) -