X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/3cb6eaec797ebbe20a0e05e5c9ba625909845e72..43f4e852a1b2ac37c3db6a2b87315192ac549191:/src/msw/textentry.cpp?ds=inline diff --git a/src/msw/textentry.cpp b/src/msw/textentry.cpp index 05bca2ac1c..a91e8f33ca 100644 --- a/src/msw/textentry.cpp +++ b/src/msw/textentry.cpp @@ -1,155 +1,991 @@ -/////////////////////////////////////////////////////////////////////////////// -// Name: src/msw/textentry.cpp -// Purpose: wxTextEntry implementation for wxMSW -// Author: Vadim Zeitlin -// Created: 2007-09-26 -// RCS-ID: $Id: wxhead.cpp,v 1.7 2007/01/09 16:22:45 zeitlin Exp $ -// Copyright: (c) 2007 Vadim Zeitlin -// Licence: wxWindows licence -/////////////////////////////////////////////////////////////////////////////// - -// ============================================================================ -// declarations -// ============================================================================ - -// ---------------------------------------------------------------------------- -// headers -// ---------------------------------------------------------------------------- - -// for compilers that support precompilation, includes "wx.h". -#include "wx/wxprec.h" - -#ifdef __BORLANDC__ - #pragma hdrstop -#endif - -#ifndef WX_PRECOMP -#endif // WX_PRECOMP - -#include "wx/textentry.h" - -#include "wx/msw/private.h" - -#define GetEditHwnd() ((HWND)(GetEditHWND())) - -// ============================================================================ -// wxTextEntry implementation -// ============================================================================ - -void wxTextEntry::WriteText(const wxString& text) -{ - ::SendMessage(GetEditHwnd(), EM_REPLACESEL, 0, (LPARAM)text.wx_str()); -} - -wxString wxTextEntry::GetValue() const -{ - return wxGetWindowText(GetEditHWND()); -} - -void wxTextEntry::Remove(long from, long to) -{ - DoSetSelection(from, to, SetSel_NoScroll); - WriteText(wxString()); -} - -void wxTextEntry::Copy() -{ - ::SendMessage(GetEditHwnd(), WM_COPY, 0, 0); -} - -void wxTextEntry::Cut() -{ - ::SendMessage(GetEditHwnd(), WM_CUT, 0, 0); -} - -void wxTextEntry::Paste() -{ - ::SendMessage(GetEditHwnd(), WM_PASTE, 0, 0); -} - -void wxTextEntry::Undo() -{ - ::SendMessage(GetEditHwnd(), EM_UNDO, 0, 0); -} - -void wxTextEntry::Redo() -{ +/////////////////////////////////////////////////////////////////////////////// +// Name: src/msw/textentry.cpp +// Purpose: wxTextEntry implementation for wxMSW +// Author: Vadim Zeitlin +// Created: 2007-09-26 +// RCS-ID: $Id$ +// Copyright: (c) 2007 Vadim Zeitlin +// Licence: wxWindows licence +/////////////////////////////////////////////////////////////////////////////// + +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + +// for compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" + +#ifdef __BORLANDC__ + #pragma hdrstop +#endif + +#ifndef WX_PRECOMP + #include "wx/arrstr.h" + #include "wx/string.h" +#endif // WX_PRECOMP + +#if wxUSE_TEXTCTRL || wxUSE_COMBOBOX + +#include "wx/textentry.h" +#include "wx/textcompleter.h" +#include "wx/dynlib.h" + +#include + +#include "wx/msw/private.h" + +#if wxUSE_UXTHEME + #include "wx/msw/uxtheme.h" +#endif + +#define GetEditHwnd() ((HWND)(GetEditHWND())) + +// ---------------------------------------------------------------------------- +// Classes used by auto-completion implementation. +// ---------------------------------------------------------------------------- + +// standard VC6 SDK (WINVER == 0x0400) does not know about IAutoComplete +#if wxUSE_OLE && (WINVER >= 0x0500) + #define HAS_AUTOCOMPLETE +#endif + +#ifdef HAS_AUTOCOMPLETE + +#include "wx/msw/ole/oleutils.h" +#include + +#if defined(__MINGW32__) || defined (__WATCOMC__) || defined(__CYGWIN__) + // needed for IID_IAutoComplete, IID_IAutoComplete2 and ACO_AUTOSUGGEST + #include + + #ifndef ACO_AUTOAPPEND + #define ACO_AUTOAPPEND 0x02 + #endif +#endif + +#ifndef ACO_UPDOWNKEYDROPSLIST + #define ACO_UPDOWNKEYDROPSLIST 0x20 +#endif + +#ifndef SHACF_FILESYS_ONLY + #define SHACF_FILESYS_ONLY 0x00000010 +#endif + +#ifndef SHACF_FILESYS_DIRS + #define SHACF_FILESYS_DIRS 0x00000020 +#endif + +namespace +{ + +// Normally this interface and its IID are defined in shobjidl.h header file +// included in the platform SDK but MinGW and Cygwin don't have it so redefine +// the interface ourselves and, as long as we do it all, do it for all +// compilers to ensure we have the same behaviour for all of them and to avoid +// the need to check for concrete compilers and maybe even their versions. +class IAutoCompleteDropDown : public IUnknown +{ +public: + virtual HRESULT wxSTDCALL GetDropDownStatus(DWORD *, LPWSTR *) = 0; + virtual HRESULT wxSTDCALL ResetEnumerator() = 0; +}; + +DEFINE_GUID(wxIID_IAutoCompleteDropDown, + 0x3cd141f4, 0x3c6a, 0x11d2, 0xbc, 0xaa, 0x00, 0xc0, 0x4f, 0xd9, 0x29, 0xdb); + +DEFINE_GUID(wxCLSID_AutoComplete, + 0x00bb2763, 0x6a77, 0x11d0, 0xa5, 0x35, 0x00, 0xc0, 0x4f, 0xd7, 0xd0, 0x62); + +// Small helper class which can be used to ensure thread safety even when +// wxUSE_THREADS==0 (and hence wxCriticalSection does nothing). +class CSLock +{ +public: + CSLock(CRITICAL_SECTION& cs) : m_cs(&cs) + { + ::EnterCriticalSection(m_cs); + } + + ~CSLock() + { + ::LeaveCriticalSection(m_cs); + } + +private: + CRITICAL_SECTION * const m_cs; + + wxDECLARE_NO_COPY_CLASS(CSLock); +}; + +} // anonymity namespace + +// Implementation of string enumerator used by wxTextAutoCompleteData. This +// class simply forwards to wxTextCompleter associated with it. +// +// Notice that Next() method of this class is called by IAutoComplete +// background thread and so we must care about thread safety here. +class wxIEnumString : public IEnumString +{ +public: + wxIEnumString() + { + Init(); + } + + void ChangeCompleter(wxTextCompleter *completer) + { + // Indicate to Next() that it should bail out as soon as possible. + { + CSLock lock(m_csRestart); + + m_restart = TRUE; + } + + // Now try to enter this critical section to ensure that Next() doesn't + // use the old pointer any more before changing it (this is vital as + // the old pointer will be destroyed after we return). + CSLock lock(m_csCompleter); + + m_completer = completer; + } + + void UpdatePrefix(const wxString& prefix) + { + CSLock lock(m_csRestart); + + // We simply store the prefix here and will really update during the + // next call to our Next() method as we want to call Start() from the + // worker thread to prevent the main UI thread from blocking while the + // completions are generated. + m_prefix = prefix; + m_restart = TRUE; + } + + virtual HRESULT STDMETHODCALLTYPE Next(ULONG celt, + LPOLESTR *rgelt, + ULONG *pceltFetched) + { + if ( !rgelt || (!pceltFetched && celt > 1) ) + return E_POINTER; + + ULONG pceltFetchedDummy; + if ( !pceltFetched ) + pceltFetched = &pceltFetchedDummy; + + *pceltFetched = 0; + + CSLock lock(m_csCompleter); + + if ( !RestartIfNeeded() ) + return S_FALSE; + + while ( celt-- ) + { + // Stop iterating if we need to update completions anyhow. + if ( m_restart ) + return S_FALSE; + + const wxString s = m_completer->GetNext(); + if ( s.empty() ) + return S_FALSE; + + const wxWX2WCbuf wcbuf = s.wc_str(); + const size_t size = (wcslen(wcbuf) + 1)*sizeof(wchar_t); + void *olestr = CoTaskMemAlloc(size); + if ( !olestr ) + return E_OUTOFMEMORY; + + memcpy(olestr, wcbuf, size); + + *rgelt++ = static_cast(olestr); + + ++(*pceltFetched); + } + + return S_OK; + } + + virtual HRESULT STDMETHODCALLTYPE Skip(ULONG celt) + { + if ( !celt ) + return E_INVALIDARG; + + CSLock lock(m_csCompleter); + + if ( !RestartIfNeeded() ) + return S_FALSE; + + while ( celt-- ) + { + if ( m_restart ) + return S_FALSE; + + if ( m_completer->GetNext().empty() ) + return S_FALSE; + } + + return S_OK; + } + + virtual HRESULT STDMETHODCALLTYPE Reset() + { + CSLock lock(m_csRestart); + + m_restart = TRUE; + + return S_OK; + } + + virtual HRESULT STDMETHODCALLTYPE Clone(IEnumString **ppEnum) + { + if ( !ppEnum ) + return E_POINTER; + + CSLock lock(m_csCompleter); + + wxIEnumString * const e = new wxIEnumString; + e->AddRef(); + + e->ChangeCompleter(m_completer); + + *ppEnum = e; + + return S_OK; + } + + DECLARE_IUNKNOWN_METHODS; + +private: + // dtor doesn't have to be virtual as we're only ever deleted from our own + // Release() and are not meant to be derived form anyhow, but making it + // virtual silences gcc warnings; making it private makes it impossible to + // (mistakenly) delete us directly instead of calling Release() + virtual ~wxIEnumString() + { + ::DeleteCriticalSection(&m_csRestart); + ::DeleteCriticalSection(&m_csCompleter); + } + + // Common part of all ctors. + void Init() + { + ::InitializeCriticalSection(&m_csCompleter); + ::InitializeCriticalSection(&m_csRestart); + + m_completer = NULL; + m_restart = FALSE; + } + + // Restart completions generation if needed. Should be only called from + // inside m_csCompleter. + // + // If false is returned, it means that there are no completions and that + // wxTextCompleter::GetNext() shouldn't be called at all. + bool RestartIfNeeded() + { + bool rc = true; + for ( ;; ) + { + wxString prefix; + LONG restart; + { + CSLock lock(m_csRestart); + + prefix = m_prefix; + restart = m_restart; + + m_restart = FALSE; + } // Release m_csRestart before calling Start() to avoid blocking + // the main thread in UpdatePrefix() during its execution. + + if ( !restart ) + break; + + rc = m_completer->Start(prefix); + } + + return rc; + } + + + // Critical section protecting m_completer itself. It must be entered when + // using the pointer to ensure that we don't continue using a dangling one + // after it is destroyed. + CRITICAL_SECTION m_csCompleter; + + // The completer we delegate to for the completions generation. It is never + // NULL after the initial ChangeCompleter() call. + wxTextCompleter *m_completer; + + + // Critical section m_prefix and m_restart. It should be only entered for + // short periods of time, i.e. we shouldn't call any wxTextCompleter + // methods from inside, to prevent the main thread from blocking on it in + // UpdatePrefix(). + CRITICAL_SECTION m_csRestart; + + // If m_restart is true, we need to call wxTextCompleter::Start() with the + // given prefix to restart generating the completions. + wxString m_prefix; + + // Notice that we use LONG and not bool here to ensure that reading this + // value is atomic (32 bit reads are atomic operations under all Windows + // versions but reading bool isn't necessarily). + LONG m_restart; + + + wxDECLARE_NO_COPY_CLASS(wxIEnumString); +}; + +BEGIN_IID_TABLE(wxIEnumString) + ADD_IID(Unknown) + ADD_IID(EnumString) +END_IID_TABLE; + +IMPLEMENT_IUNKNOWN_METHODS(wxIEnumString) + + +// This class gathers the all auto-complete-related stuff we use. It is +// allocated on demand by wxTextEntry when AutoComplete() is called. +class wxTextAutoCompleteData wxBIND_OR_CONNECT_HACK_ONLY_BASE_CLASS +{ +public: + // The constructor associates us with the given text entry. + wxTextAutoCompleteData(wxTextEntry *entry) + : m_entry(entry), + m_win(entry->GetEditableWindow()) + { + m_autoComplete = NULL; + m_autoCompleteDropDown = NULL; + m_enumStrings = NULL; + + m_fixedCompleter = NULL; + m_customCompleter = NULL; + + m_connectedCharEvent = false; + + // Create an object exposing IAutoComplete interface which we'll later + // use to get IAutoComplete2 as the latter can't be created directly, + // apparently. + HRESULT hr = CoCreateInstance + ( + wxCLSID_AutoComplete, + NULL, + CLSCTX_INPROC_SERVER, + IID_IAutoComplete, + reinterpret_cast(&m_autoComplete) + ); + if ( FAILED(hr) ) + { + wxLogApiError(wxT("CoCreateInstance(CLSID_AutoComplete)"), hr); + return; + } + + // Create a string enumerator and initialize the completer with it. + m_enumStrings = new wxIEnumString; + m_enumStrings->AddRef(); + hr = m_autoComplete->Init(m_entry->GetEditHWND(), m_enumStrings, + NULL, NULL); + if ( FAILED(hr) ) + { + wxLogApiError(wxT("IAutoComplete::Init"), hr); + + m_enumStrings->Release(); + m_enumStrings = NULL; + + return; + } + + // As explained in DoRefresh(), we need to call IAutoCompleteDropDown:: + // ResetEnumerator() if we want to be able to change the completions on + // the fly. In principle we could live without it, i.e. return true + // from IsOk() even if this QueryInterface() fails, but it doesn't look + // like this is ever going to have in practice anyhow as the shell- + // provided IAutoComplete always implements IAutoCompleteDropDown too. + hr = m_autoComplete->QueryInterface + ( + wxIID_IAutoCompleteDropDown, + reinterpret_cast(&m_autoCompleteDropDown) + ); + if ( FAILED(hr) ) + { + wxLogApiError(wxT("IAutoComplete::QI(IAutoCompleteDropDown)"), hr); + return; + } + + // Finally set the completion options using IAutoComplete2. + IAutoComplete2 *pAutoComplete2 = NULL; + hr = m_autoComplete->QueryInterface + ( + IID_IAutoComplete2, + reinterpret_cast(&pAutoComplete2) + ); + if ( SUCCEEDED(hr) ) + { + pAutoComplete2->SetOptions(ACO_AUTOSUGGEST | + ACO_AUTOAPPEND | + ACO_UPDOWNKEYDROPSLIST); + pAutoComplete2->Release(); + } + } + + ~wxTextAutoCompleteData() + { + delete m_customCompleter; + delete m_fixedCompleter; + + if ( m_enumStrings ) + m_enumStrings->Release(); + if ( m_autoCompleteDropDown ) + m_autoCompleteDropDown->Release(); + if ( m_autoComplete ) + m_autoComplete->Release(); + } + + // Must be called after creating this object to verify if initializing it + // succeeded. + bool IsOk() const + { + return m_autoComplete && m_autoCompleteDropDown && m_enumStrings; + } + + void ChangeStrings(const wxArrayString& strings) + { + if ( !m_fixedCompleter ) + m_fixedCompleter = new wxTextCompleterFixed; + + m_fixedCompleter->SetCompletions(strings); + + m_enumStrings->ChangeCompleter(m_fixedCompleter); + + DoRefresh(); + } + + // Takes ownership of the pointer if it is non-NULL. + bool ChangeCustomCompleter(wxTextCompleter *completer) + { + // Ensure that the old completer is not used any more before deleting + // it. + m_enumStrings->ChangeCompleter(completer); + + delete m_customCompleter; + m_customCompleter = completer; + + if ( m_customCompleter ) + { + // We postpone connecting to this event until we really need to do + // it (however we don't disconnect from it when we don't need it + // any more because we don't have wxUNBIND_OR_DISCONNECT_HACK...). + if ( !m_connectedCharEvent ) + { + m_connectedCharEvent = true; + + // Use the special wxEVT_AFTER_CHAR and not the usual + // wxEVT_CHAR here because we need to have the updated value of + // the text control in this handler in order to provide + // completions for the correct prefix and unfortunately we + // don't have any way to let DefWindowProc() run from our + // wxEVT_CHAR handler (as we must also let the other handlers + // defined at wx level run first). + // + // Notice that we can't use wxEVT_COMMAND_TEXT_UPDATED here + // neither as, due to our use of ACO_AUTOAPPEND, we get + // EN_CHANGE notifications from the control every time + // IAutoComplete auto-appends something to it. + wxBIND_OR_CONNECT_HACK(m_win, wxEVT_AFTER_CHAR, + wxKeyEventHandler, + wxTextAutoCompleteData::OnAfterChar, + this); + } + + UpdateStringsFromCustomCompleter(); + } + + return true; + } + + void DisableCompletion() + { + // We currently simply reset the list of possible strings as this seems + // to effectively disable auto-completion just fine. We could (and + // probably should) use IAutoComplete::Enable(FALSE) for this too but + // then we'd need to call Enable(TRUE) to turn it on back again later. + ChangeStrings(wxArrayString()); + } + +private: + // Must be called after changing the values to be returned by wxIEnumString + // to really make the changes stick. + void DoRefresh() + { + m_enumStrings->Reset(); + + // This is completely and utterly not documented and in fact the + // current MSDN seems to try to discourage us from using it by saying + // that "there is no reason to use this method unless the drop-down + // list is currently visible" but actually we absolutely must call it + // to force the auto-completer (and not just its drop-down!) to refresh + // the list of completions which could have changed now. Without this + // call the new choices returned by GetCompletions() that hadn't been + // returned by it before are simply silently ignored. + m_autoCompleteDropDown->ResetEnumerator(); + } + + // Update the strings returned by our string enumerator to correspond to + // the currently valid choices according to the custom completer. + void UpdateStringsFromCustomCompleter() + { + // As we use ACO_AUTOAPPEND, the selected part of the text is usually + // the one appended by us so don't consider it as part of the + // user-entered prefix. + long from, to; + m_entry->GetSelection(&from, &to); + + if ( to == from ) + from = m_entry->GetLastPosition(); // Take all if no selection. + + const wxString prefix = m_entry->GetRange(0, from); + + m_enumStrings->UpdatePrefix(prefix); + + DoRefresh(); + } + + void OnAfterChar(wxKeyEvent& event) + { + // Notice that we must not refresh the completions when the user + // presses Backspace as this would result in adding back the just + // erased character(s) because of ACO_AUTOAPPEND option we use. + if ( m_customCompleter && event.GetKeyCode() != WXK_BACK ) + UpdateStringsFromCustomCompleter(); + + event.Skip(); + } + + + // The text entry we're associated with. + wxTextEntry * const m_entry; + + // The window of this text entry. + wxWindow * const m_win; + + // The auto-completer object itself. + IAutoComplete *m_autoComplete; + + // Its IAutoCompleteDropDown interface needed for ResetEnumerator() call. + IAutoCompleteDropDown *m_autoCompleteDropDown; + + // Enumerator for strings currently used for auto-completion. + wxIEnumString *m_enumStrings; + + // Fixed string completer or NULL if none. + wxTextCompleterFixed *m_fixedCompleter; + + // Custom completer or NULL if none. + wxTextCompleter *m_customCompleter; + + // Initially false, set to true after connecting OnTextChanged() handler. + bool m_connectedCharEvent; + + + wxDECLARE_NO_COPY_CLASS(wxTextAutoCompleteData); +}; + +#endif // HAS_AUTOCOMPLETE + +// ============================================================================ +// wxTextEntry implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// initialization and destruction +// ---------------------------------------------------------------------------- + +wxTextEntry::wxTextEntry() +{ +#ifdef HAS_AUTOCOMPLETE + m_autoCompleteData = NULL; +#endif // HAS_AUTOCOMPLETE +} + +wxTextEntry::~wxTextEntry() +{ +#ifdef HAS_AUTOCOMPLETE + delete m_autoCompleteData; +#endif // HAS_AUTOCOMPLETE +} + +// ---------------------------------------------------------------------------- +// operations on text +// ---------------------------------------------------------------------------- + +void wxTextEntry::WriteText(const wxString& text) +{ + ::SendMessage(GetEditHwnd(), EM_REPLACESEL, 0, wxMSW_CONV_LPARAM(text)); +} + +wxString wxTextEntry::DoGetValue() const +{ + return wxGetWindowText(GetEditHWND()); +} + +void wxTextEntry::Remove(long from, long to) +{ + DoSetSelection(from, to, SetSel_NoScroll); + WriteText(wxString()); +} + +// ---------------------------------------------------------------------------- +// clipboard operations +// ---------------------------------------------------------------------------- + +void wxTextEntry::Copy() +{ + ::SendMessage(GetEditHwnd(), WM_COPY, 0, 0); +} + +void wxTextEntry::Cut() +{ + ::SendMessage(GetEditHwnd(), WM_CUT, 0, 0); +} + +void wxTextEntry::Paste() +{ + ::SendMessage(GetEditHwnd(), WM_PASTE, 0, 0); +} + +// ---------------------------------------------------------------------------- +// undo/redo +// ---------------------------------------------------------------------------- + +void wxTextEntry::Undo() +{ + ::SendMessage(GetEditHwnd(), EM_UNDO, 0, 0); +} + +void wxTextEntry::Redo() +{ // same as Undo, since Undo undoes the undo - Undo(); - return; -} - -bool wxTextEntry::CanUndo() const -{ - return ::SendMessage(GetEditHwnd(), EM_CANUNDO, 0, 0) != 0; -} - -bool wxTextEntry::CanRedo() const -{ - // see comment in Redo() - return CanUndo(); -} - -void wxTextEntry::SetInsertionPoint(long pos) -{ - // be careful to call DoSetSelection() which is overridden in wxTextCtrl - // and not just SetSelection() here - DoSetSelection(pos, pos); -} - -long wxTextEntry::GetInsertionPoint() const -{ - long from; - GetSelection(&from, NULL); - return from; -} - -long wxTextEntry::GetLastPosition() const -{ - return ::SendMessage(GetEditHwnd(), EM_LINELENGTH, 0, 0); -} - -void wxTextEntry::DoSetSelection(long from, long to, int WXUNUSED(flags)) -{ - // if from and to are both -1, it means (in wxWidgets) that all text should - // be selected, translate this into Windows convention - if ( (from == -1) && (to == -1) ) - { - from = 0; - } - - ::SendMessage(GetEditHwnd(), EM_SETSEL, from, to); -} - -void wxTextEntry::GetSelection(long *from, long *to) const -{ - DWORD dwStart, dwEnd; - ::SendMessage(GetEditHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd); - - if ( from ) - *from = dwStart; - if ( to ) - *to = dwEnd; -} - -bool wxTextEntry::IsEditable() const -{ - return (::GetWindowLong(GetEditHwnd(), GWL_STYLE) & ES_READONLY) != 0; -} - -void wxTextEntry::SetEditable(bool editable) -{ - ::SendMessage(GetEditHwnd(), EM_SETREADONLY, !editable, 0); -} - -void wxTextEntry::SetMaxLength(unsigned long len) -{ - if ( len >= 0xffff ) - { - // this will set it to a platform-dependent maximum (much more - // than 64Kb under NT) - len = 0; - } - - ::SendMessage(GetEditHwnd(), EM_LIMITTEXT, len, 0); -} + Undo(); + return; +} + +bool wxTextEntry::CanUndo() const +{ + return ::SendMessage(GetEditHwnd(), EM_CANUNDO, 0, 0) != 0; +} + +bool wxTextEntry::CanRedo() const +{ + // see comment in Redo() + return CanUndo(); +} + +// ---------------------------------------------------------------------------- +// insertion point and selection +// ---------------------------------------------------------------------------- + +void wxTextEntry::SetInsertionPoint(long pos) +{ + // calling DoSetSelection(-1, -1) would select everything which is not what + // we want here + if ( pos == -1 ) + pos = GetLastPosition(); + + // be careful to call DoSetSelection() which is overridden in wxTextCtrl + // and not just SetSelection() here + DoSetSelection(pos, pos); +} + +long wxTextEntry::GetInsertionPoint() const +{ + long from; + GetSelection(&from, NULL); + return from; +} + +long wxTextEntry::GetLastPosition() const +{ + return ::SendMessage(GetEditHwnd(), EM_LINELENGTH, 0, 0); +} + +void wxTextEntry::DoSetSelection(long from, long to, int WXUNUSED(flags)) +{ + // if from and to are both -1, it means (in wxWidgets) that all text should + // be selected, translate this into Windows convention + if ( (from == -1) && (to == -1) ) + { + from = 0; + } + + ::SendMessage(GetEditHwnd(), EM_SETSEL, from, to); +} + +void wxTextEntry::GetSelection(long *from, long *to) const +{ + DWORD dwStart, dwEnd; + ::SendMessage(GetEditHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd); + + if ( from ) + *from = dwStart; + if ( to ) + *to = dwEnd; +} + +// ---------------------------------------------------------------------------- +// auto-completion +// ---------------------------------------------------------------------------- + +#if wxUSE_OLE + +#ifdef HAS_AUTOCOMPLETE + +#if wxUSE_DYNLIB_CLASS + +bool wxTextEntry::DoAutoCompleteFileNames(int flags) +{ + typedef HRESULT (WINAPI *SHAutoComplete_t)(HWND, DWORD); + static SHAutoComplete_t s_pfnSHAutoComplete = (SHAutoComplete_t)-1; + static wxDynamicLibrary s_dllShlwapi; + if ( s_pfnSHAutoComplete == (SHAutoComplete_t)-1 ) + { + if ( !s_dllShlwapi.Load(wxT("shlwapi.dll"), wxDL_VERBATIM | wxDL_QUIET) ) + { + s_pfnSHAutoComplete = NULL; + } + else + { + wxDL_INIT_FUNC(s_pfn, SHAutoComplete, s_dllShlwapi); + } + } + + if ( !s_pfnSHAutoComplete ) + return false; + + DWORD dwFlags = 0; + if ( flags & wxFILE ) + dwFlags |= SHACF_FILESYS_ONLY; + else if ( flags & wxDIR ) + dwFlags |= SHACF_FILESYS_DIRS; + else + { + wxFAIL_MSG(wxS("No flags for file name auto completion?")); + return false; + } + + HRESULT hr = (*s_pfnSHAutoComplete)(GetEditHwnd(), dwFlags); + if ( FAILED(hr) ) + { + wxLogApiError(wxT("SHAutoComplete()"), hr); + + return false; + } + + // Disable the other kinds of completion now that we use the built-in file + // names completion. + if ( m_autoCompleteData ) + m_autoCompleteData->DisableCompletion(); + + return true; +} + +#endif // wxUSE_DYNLIB_CLASS + +wxTextAutoCompleteData *wxTextEntry::GetOrCreateCompleter() +{ + if ( !m_autoCompleteData ) + { + wxTextAutoCompleteData * const ac = new wxTextAutoCompleteData(this); + if ( ac->IsOk() ) + m_autoCompleteData = ac; + else + delete ac; + } + + return m_autoCompleteData; +} + +bool wxTextEntry::DoAutoCompleteStrings(const wxArrayString& choices) +{ + wxTextAutoCompleteData * const ac = GetOrCreateCompleter(); + if ( !ac ) + return false; + + ac->ChangeStrings(choices); + + return true; +} + +bool wxTextEntry::DoAutoCompleteCustom(wxTextCompleter *completer) +{ + // First deal with the case when we just want to disable auto-completion. + if ( !completer ) + { + if ( m_autoCompleteData ) + m_autoCompleteData->DisableCompletion(); + //else: Nothing to do, we hadn't used auto-completion even before. + } + else // Have a valid completer. + { + wxTextAutoCompleteData * const ac = GetOrCreateCompleter(); + if ( !ac ) + { + // Delete the custom completer for consistency with the case when + // we succeed to avoid memory leaks in user code. + delete completer; + return false; + } + + // This gives ownership of the custom completer to m_autoCompleteData. + if ( !ac->ChangeCustomCompleter(completer) ) + return false; + } + + return true; +} + +#else // !HAS_AUTOCOMPLETE + +// We still need to define stubs as we declared these overrides in the header. + +bool wxTextEntry::DoAutoCompleteFileNames(int flags) +{ + return wxTextEntryBase::DoAutoCompleteFileNames(flags); +} + +bool wxTextEntry::DoAutoCompleteStrings(const wxArrayString& choices) +{ + return wxTextEntryBase::DoAutoCompleteStrings(choices); +} + +bool wxTextEntry::DoAutoCompleteCustom(wxTextCompleter *completer) +{ + return wxTextEntryBase::DoAutoCompleteCustom(completer); +} + +#endif // HAS_AUTOCOMPLETE/!HAS_AUTOCOMPLETE + +#endif // wxUSE_OLE + +// ---------------------------------------------------------------------------- +// editable state +// ---------------------------------------------------------------------------- + +bool wxTextEntry::IsEditable() const +{ + return !(::GetWindowLong(GetEditHwnd(), GWL_STYLE) & ES_READONLY); +} + +void wxTextEntry::SetEditable(bool editable) +{ + ::SendMessage(GetEditHwnd(), EM_SETREADONLY, !editable, 0); +} + +// ---------------------------------------------------------------------------- +// max length +// ---------------------------------------------------------------------------- + +void wxTextEntry::SetMaxLength(unsigned long len) +{ + if ( len >= 0xffff ) + { + // this will set it to a platform-dependent maximum (much more + // than 64Kb under NT) + len = 0; + } + + ::SendMessage(GetEditHwnd(), EM_LIMITTEXT, len, 0); +} + +// ---------------------------------------------------------------------------- +// hints +// ---------------------------------------------------------------------------- + +#if wxUSE_UXTHEME + +#ifndef EM_SETCUEBANNER + #define EM_SETCUEBANNER 0x1501 + #define EM_GETCUEBANNER 0x1502 +#endif + +bool wxTextEntry::SetHint(const wxString& hint) +{ + if ( wxUxThemeEngine::GetIfActive() ) + { + // notice that this message always works with Unicode strings + // + // we always use TRUE for wParam to show the hint even when the window + // has focus, otherwise there would be no way to show the hint for the + // initially focused window + if ( ::SendMessage(GetEditHwnd(), EM_SETCUEBANNER, + TRUE, (LPARAM)(const wchar_t *)hint.wc_str()) ) + return true; + } + + return wxTextEntryBase::SetHint(hint); +} + +wxString wxTextEntry::GetHint() const +{ + if ( wxUxThemeEngine::GetIfActive() ) + { + wchar_t buf[256]; + if ( ::SendMessage(GetEditHwnd(), EM_GETCUEBANNER, + (WPARAM)buf, WXSIZEOF(buf)) ) + return wxString(buf); + } + + return wxTextEntryBase::GetHint(); +} + + +#endif // wxUSE_UXTHEME + +// ---------------------------------------------------------------------------- +// margins support +// ---------------------------------------------------------------------------- + +bool wxTextEntry::DoSetMargins(const wxPoint& margins) +{ +#if !defined(__WXWINCE__) + bool res = true; + + if ( margins.x != -1 ) + { + // Set both horizontal margins to the given value, we don't distinguish + // between left and right margin at wx API level and it seems to be + // better to change both of them than only left one. + ::SendMessage(GetEditHwnd(), EM_SETMARGINS, + EC_LEFTMARGIN | EC_RIGHTMARGIN, + MAKELONG(margins.x, margins.x)); + } + + if ( margins.y != -1 ) + { + res = false; + } + + return res; +#else + return false; +#endif +} + +wxPoint wxTextEntry::DoGetMargins() const +{ +#if !defined(__WXWINCE__) + LRESULT lResult = ::SendMessage(GetEditHwnd(), EM_GETMARGINS, + 0, 0); + int left = LOWORD(lResult); + int top = -1; + return wxPoint(left, top); +#else + return wxPoint(-1, -1); +#endif +} + +#endif // wxUSE_TEXTCTRL || wxUSE_COMBOBOX