X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c5ca409b6a6cc4ab503f5d81afa2f637ec609f4c..3988b3e819a2e336b8fcd90214c949f61069279b:/src/msw/choice.cpp diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp index 6d0d18243b..a14e549464 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" @@ -28,75 +24,21 @@ #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/app.h" #include "wx/log.h" #include "wx/brush.h" #include "wx/settings.h" #endif -#include "wx/msw/private.h" +#include "wx/dynlib.h" -#if wxUSE_EXTENDED_RTTI -WX_DEFINE_FLAGS( wxChoiceStyle ) - -WX_BEGIN_FLAGS( wxChoiceStyle ) - // new style border flags, we put them first to - // use them for streaming out - WX_FLAGS_MEMBER(wxBORDER_SIMPLE) - WX_FLAGS_MEMBER(wxBORDER_SUNKEN) - WX_FLAGS_MEMBER(wxBORDER_DOUBLE) - WX_FLAGS_MEMBER(wxBORDER_RAISED) - WX_FLAGS_MEMBER(wxBORDER_STATIC) - WX_FLAGS_MEMBER(wxBORDER_NONE) - - // old style border flags - WX_FLAGS_MEMBER(wxSIMPLE_BORDER) - WX_FLAGS_MEMBER(wxSUNKEN_BORDER) - WX_FLAGS_MEMBER(wxDOUBLE_BORDER) - WX_FLAGS_MEMBER(wxRAISED_BORDER) - WX_FLAGS_MEMBER(wxSTATIC_BORDER) - WX_FLAGS_MEMBER(wxNO_BORDER) - - // standard window styles - WX_FLAGS_MEMBER(wxTAB_TRAVERSAL) - WX_FLAGS_MEMBER(wxCLIP_CHILDREN) - WX_FLAGS_MEMBER(wxTRANSPARENT_WINDOW) - WX_FLAGS_MEMBER(wxWANTS_CHARS) - WX_FLAGS_MEMBER(wxNO_FULL_REPAINT_ON_RESIZE) - WX_FLAGS_MEMBER(wxALWAYS_SHOW_SB ) - WX_FLAGS_MEMBER(wxVSCROLL) - WX_FLAGS_MEMBER(wxHSCROLL) - -WX_END_FLAGS( wxChoiceStyle ) - -IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControl,"wx/choice.h") - -WX_BEGIN_PROPERTIES_TABLE(wxChoice) - WX_DELEGATE( OnSelect , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent ) - - 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_PROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style -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 ) -#else -IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl) -#endif -/* - TODO PROPERTIES - selection (long) - content (list) - item -*/ +#include "wx/msw/private.h" // ============================================================================ // implementation @@ -115,105 +57,234 @@ 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) && !(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") ); - if ( !MSWCreateControl(wxT("COMBOBOX"), msStyle) ) - return FALSE; + return CreateAndInit(parent, id, pos, size, n, choices, style, + validator, name); +} - // A choice/combobox normally has a white background (or other, depending - // on global settings) rather than inheriting the parent's background colour. - SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW)); +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; - for ( int i = 0; i < n; i++ ) - { - Append(choices[i]); - } + // now create the real HWND + if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) ) + return false; + + + // initialize the controls contents + Append(n, choices); - 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 ) + return msStyle; +} + +#ifndef EP_EDITTEXT + #define EP_EDITTEXT 1 + #define ETS_NORMAL 1 +#endif + +wxVisualAttributes +wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) +{ + // it is important to return valid values for all attributes from here, + // GetXXX() below rely on this + wxVisualAttributes attrs; + + // FIXME: Use better dummy window? + wxWindow* wnd = wxTheApp->GetTopWindow(); + if (!wnd) + return attrs; + + attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT); + + // there doesn't seem to be any way to get the text colour using themes + // API: TMT_TEXTCOLOR doesn't work neither for EDIT nor COMBOBOX + attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT); + + // NB: use EDIT, not COMBOBOX (the latter works in XP but not Vista) + attrs.colBg = wnd->MSWGetThemeColour(L"EDIT", + EP_EDITTEXT, + ETS_NORMAL, + ThemeColourBackground, + wxSYS_COLOUR_WINDOW); + + return attrs; +} + +wxChoice::~wxChoice() +{ + Clear(); +} + +bool wxChoice::MSWGetComboBoxInfo(tagCOMBOBOXINFO* info) const +{ + // TODO-Win9x: Get rid of this once we officially drop support for Win9x + // and just call the function directly. +#if wxUSE_DYNLIB_CLASS + typedef BOOL (WINAPI *GetComboBoxInfo_t)(HWND, tagCOMBOBOXINFO*); + static GetComboBoxInfo_t s_pfnGetComboBoxInfo = NULL; + static bool s_triedToLoad = false; + if ( !s_triedToLoad ) { - wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)")); + s_triedToLoad = true; + wxLoadedDLL dllUser32("user32.dll"); + wxDL_INIT_FUNC(s_pfn, GetComboBoxInfo, dllUser32); } - return n; + if ( s_pfnGetComboBoxInfo ) + return (*s_pfnGetComboBoxInfo)(GetHwnd(), info) != 0; +#endif // wxUSE_DYNLIB_CLASS + + return false; } -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(); + + // 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 ( HasClientObjectData() ) + 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(); } // ---------------------------------------------------------------------------- @@ -221,6 +292,17 @@ 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); } @@ -234,63 +316,91 @@ 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, wxMSW_CONV_LPARAM(s)); + + 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 - // 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); + + // and also the selection if we're going to delete the item that was + // selected + const bool wasSelected = static_cast(n) == GetSelection(); ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0); - ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.c_str() ); + ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, wxMSW_CONV_LPARAM(s) ); - 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); + + // and the selection + if ( wasSelected ) + SetSelection(n); + + // the width could have changed so the best size needs to be recomputed + InvalidateBestSize(); } -wxString wxChoice::GetString(int n) const +wxString wxChoice::GetString(unsigned int n) const { int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0); @@ -316,7 +426,7 @@ 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 ) @@ -325,10 +435,10 @@ 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 ) + if ( rc == CB_ERR && GetLastError() != ERROR_SUCCESS ) { wxLogLastError(wxT("CB_GETITEMDATA")); @@ -339,19 +449,47 @@ void* wxChoice::DoGetItemClientData( int n ) const 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) { @@ -371,65 +509,227 @@ 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 +{ + 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, - 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. + const int heightBest = GetBestSize().y; + + // we need the real height below so get the current one if it's not given + if ( height == wxDefaultCoord ) + { + // height not specified, use the same as before + DoGetSize(NULL, &height); + } + else if ( height == heightBest ) + { + // we don't need to manually manage our height, let the system use the + // default one + m_heightOwn = wxDefaultCoord; + } + else // non-default height specified + { + // 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; + } + + + // 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 (!HasFlag(wxCB_SIMPLE)) + { + if ( !nItems ) + nItems = 9; + else if ( nItems > 30 ) + nItems = 30; + } + + const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0); + int heightWithItems = 0; + if (!HasFlag(wxCB_SIMPLE)) + // The extra item (" + 1") is required to prevent a vertical + // scrollbar from appearing with comctl32.dll versions earlier + // than 6.0 (such as found in Win2k). + heightWithItems = height + hItem*(nItems + 1); + else + heightWithItems = SetHeightSimpleComboBox(nItems); + - wxControl::DoSetSize(x, y, width, -1, sizeFlags); + // do resize the native control + wxControl::DoSetSize(x, y, width, heightWithItems, 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 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 - int wLine; - int wChoice = 0; - int nItems = GetCount(); - for ( int i = 0; i < nItems; i++ ) + // The base version returns the size of the largest string + return GetSizeFromTextSize(wxChoiceBase::DoGetBestSize().x); +} + +int wxChoice::SetHeightSimpleComboBox(int nItems) const +{ + int cx, cy; + wxGetCharSize( GetHWND(), &cx, &cy, GetFont() ); + int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0); + return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1; +} + +wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const +{ + int cHeight = GetCharHeight(); + + // We are interested in the difference of sizes between the whole control + // and its child part. I.e. arrow, separators, etc. + wxSize tsize(xlen, 0); + + // FIXME-VC6: Only VC6 needs this guard, see WINVER definition in + // include/wx/msw/wrapwin.h +#if defined(WINVER) && WINVER >= 0x0500 + WinStruct info; + if ( MSWGetComboBoxInfo(&info) ) { - wxString str(GetString(i)); - GetTextExtent(str, &wLine, NULL); - if ( wLine > wChoice ) - wChoice = wLine; + tsize.x += info.rcItem.left + info.rcButton.right - info.rcItem.right + + info.rcItem.left + 3; // right and extra margins + } + else // Just use some rough approximation. +#endif // WINVER >= 0x0500 + { + tsize.x += 4*cHeight; } - // give it some reasonable default value if there are no strings in the - // list - if ( wChoice == 0 ) - wChoice = 100; + // set height on our own + if( HasFlag( wxCB_SIMPLE ) ) + tsize.y = SetHeightSimpleComboBox(GetCount()); + else + tsize.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cHeight); - // the combobox should be larger than the widest string - int cx, cy; - wxGetCharSize(GetHWND(), &cx, &cy, &GetFont()); + // Perhaps the user wants something different from CharHeight + if ( ylen > 0 ) + tsize.IncBy(0, ylen - cHeight); - wChoice += 5*cx; + return tsize; +} + +// ---------------------------------------------------------------------------- +// Popup operations +// ---------------------------------------------------------------------------- - // 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; +void wxChoice::MSWDoPopupOrDismiss(bool show) +{ + wxASSERT_MSG( !HasFlag(wxCB_SIMPLE), + wxT("can't popup/dismiss the list for simple combo box") ); - return wxSize(wChoice, hChoice); + // we *must* set focus to the combobox before showing or hiding the drop + // down as without this we get WM_LBUTTONDOWN messages with invalid HWND + // when hiding it (whether programmatically or manually) resulting in a + // crash when we pass them to IsDialogMessage() + // + // this can be seen in the combo page of the widgets sample under Windows 7 + SetFocus(); + + ::SendMessage(GetHwnd(), CB_SHOWDROPDOWN, show, 0); } -long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) +bool wxChoice::Show(bool show) { - if ( nMsg == WM_LBUTTONUP ) + if ( !wxChoiceBase::Show(show) ) + return false; + + // When hiding the combobox, we also need to hide its popup part as it + // doesn't happen automatically. + if ( !show && ::SendMessage(GetHwnd(), CB_GETDROPPEDSTATE, 0, 0) ) + MSWDoPopupOrDismiss(false); + + return true; +} + +// ---------------------------------------------------------------------------- +// MSW message handlers +// ---------------------------------------------------------------------------- + +WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) +{ + 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); @@ -437,47 +737,97 @@ 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). Here are the different cases: + + 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. + + Additionally, notice that CBN_SELENDCANCEL doesn't seem to actually + cancel anything, if we get CBN_SELCHANGE before it, as it happens in + the case (B), the selection is still accepted. This doesn't make much + sense and directly contradicts MSDN documentation but is how the native + comboboxes behave and so we do the same thing. + */ + 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 ( m_pendingSelection != wxID_NONE ) + { + // This can only happen in the case (B), so set the item + // selected in the drop down as our real selection. + SendSelectionChangedEvent(wxEVT_CHOICE); + m_pendingSelection = wxID_NONE; + } + break; + + case CBN_SELENDOK: + // Reset the variables to prevent CBN_CLOSEUP from doing anything, + // it's not needed if we do get CBN_SELENDOK. + m_lastAcceptedSelection = + m_pendingSelection = wxID_NONE; + + SendSelectionChangedEvent(wxEVT_CHOICE); + break; + + case CBN_SELCHANGE: + // If we get this event after CBN_SELENDOK, i.e. cases (A) or (C) + // above, we don't have anything to do. But in the case (B) we need + // to remember that the selection should really change once the + // drop down is closed. + if ( m_lastAcceptedSelection != wxID_NONE ) + m_pendingSelection = GetCurrentSelection(); + break; + + case CBN_SELENDCANCEL: + // Do not reset m_pendingSelection here -- it would make sense but, + // as described above, native controls keep the selection even when + // closing the drop down by pressing Escape or TAB, so conform to + // their behaviour. + m_lastAcceptedSelection = wxID_NONE; + break; + + 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 ( !IsThisEnabled() ) + return MSWControlColorDisabled(hDC); - return (WXHBRUSH)brush->GetResourceHandle(); + return wxChoiceBase::MSWControlColor(hDC, hWnd); } -#endif // wxUSE_CHOICE +#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)