textctrl.cpp

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}

void wxTextCtrl::OnChar(wxKeyEvent& event)
{
    switch ( event.GetKeyCode() )
    {
        case WXK_RETURN:
            if ( !HasFlag(wxTE_MULTILINE) )
            {
                wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                InitCommandEvent(event);
                event.SetString(GetValue());
                if ( GetEventHandler()->ProcessEvent(event) )
                    return;
            }
            //else: multiline controls need Enter for themselves

            break;

        case WXK_TAB:
            // ok, so this is getting absolutely ridiculous but I don't see
            // any other way to fix this bug: when a multiline text control is
            // inside a wxFrame, we need to generate the navigation event as
            // otherwise nothing happens at all, but when the same control is
            // created inside a dialog, IsDialogMessage() *does* switch focus
            // all by itself and so if we do it here as well, it is advanced
            // twice and goes to the next control... to prevent this from
            // happening we're doing this ugly check, the logic being that if
            // we don't have focus then it had been already changed to the next
            // control
            //
            // the right thing to do would, of course, be to understand what
            // the hell is IsDialogMessage() doing but this is beyond my feeble
            // forces at the moment unfortunately
            if ( !(m_windowStyle & wxTE_PROCESS_TAB))
            {
                if ( FindFocus() == this )
                {
                    int flags = 0;
                    if (!event.ShiftDown())
                        flags |= wxNavigationKeyEvent::IsForward ;
                    if (event.ControlDown())
                        flags |= wxNavigationKeyEvent::WinChange ;
                    if (Navigate(flags))
                        return;
                }
            }
            else
            {
                // Insert tab since calling the default Windows handler
                // doesn't seem to do it
                WriteText(wxT("\t"));
                return;
            }
            break;
    }

    // no, we didn't process it
    event.Skip();
}

WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
    WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);

    if ( nMsg == WM_GETDLGCODE )
    {
        // we always want the chars and the arrows: the arrows for navigation
        // and the chars because we want Ctrl-C to work even in a read only
        // control
        long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;

        if ( IsEditable() )
        {
            // we may have several different cases:
            // 1. normal case: both TAB and ENTER are used for dlg navigation
            // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
            //    next control in the dialog
            // 3. ctrl which wants ENTER for itself: TAB is used for dialog
            //    navigation
            // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
            //    to the next control

            // the multiline edit control should always get <Return> for itself
            if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
                lDlgCode |= DLGC_WANTMESSAGE;

            if ( HasFlag(wxTE_PROCESS_TAB) )
                lDlgCode |= DLGC_WANTTAB;

            lRc |= lDlgCode;
        }
        else // !editable
        {
            // NB: use "=", not "|=" as the base class version returns the
            //     same flags is this state as usual (i.e. including
            //     DLGC_WANTMESSAGE). This is strange (how does it work in the
            //     native Win32 apps?) but for now live with it.
            lRc = lDlgCode;
        }
    }

    return lRc;
}

// ----------------------------------------------------------------------------
// text control event processing
// ----------------------------------------------------------------------------

bool wxTextCtrl::SendUpdateEvent()
{
    switch ( m_updatesCount )
    {
        case 0:
            // remember that we've got an update
            m_updatesCount++;
            break;

        case 1:
            // we had already sent one event since the last control modification
            return false;

        default:
            wxFAIL_MSG( _T("unexpected wxTextCtrl::m_updatesCount value") );
            // fall through

        case -1:
            // we hadn't updated the control ourselves, this event comes from
            // the user, don't need to ignore it nor update the count
            break;
    }

    wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
    InitCommandEvent(event);

    return ProcessCommand(event);
}

bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
    switch ( param )
    {
        case EN_SETFOCUS:
        case EN_KILLFOCUS:
            {
                wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
                                                         : wxEVT_SET_FOCUS,
                                   m_windowId);
                event.SetEventObject(this);
                GetEventHandler()->ProcessEvent(event);
            }
            break;

        case EN_CHANGE:
            SendUpdateEvent();
            break;

        case EN_MAXTEXT:
            // the text size limit has been hit -- try to increase it
            if ( !AdjustSpaceLimit() )
            {
                wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
                InitCommandEvent(event);
                event.SetString(GetValue());
                ProcessCommand(event);
            }
            break;

            // the other edit notification messages are not processed
        default:
            return false;
    }

    // processed
    return true;
}

WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
{
    if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
        return MSWControlColorDisabled(hDC);

    return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
}

bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
{
    // HACK: we try to automatically extend the limit for the amount of text
    //       to allow (interactively) entering more than 64Kb of text under
    //       Win9x but we shouldn't reset the text limit which was previously
    //       set explicitly with SetMaxLength()
    //
    //       Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
    //       know the limit we set (if any). We could solve this by storing the
    //       limit we set in wxTextCtrl but to save space we prefer to simply
    //       test here the actual limit value: we consider that SetMaxLength()
    //       can only be called for small values while EN_MAXTEXT is only sent
    //       for large values (in practice the default limit seems to be 30000
    //       but make it smaller just to be on the safe side)
    *len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
    return *len < 10001;

}

bool wxTextCtrl::AdjustSpaceLimit()
{
    unsigned int limit;
    if ( HasSpaceLimit(&limit) )
        return false;

    unsigned int len = ::GetWindowTextLength(GetHwnd());
    if ( len >= limit )
    {
        // increment in 32Kb chunks
        SetMaxLength(len + 0x8000);
    }

    // we changed the limit
    return true;
}

bool wxTextCtrl::AcceptsFocus() const
{
    // we don't want focus if we can't be edited unless we're a multiline
    // control because then it might be still nice to get focus from keyboard
    // to be able to scroll it without mouse
    return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
}

wxSize wxTextCtrl::DoGetBestSize() const
{
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, GetFont());

    int wText = DEFAULT_ITEM_WIDTH;

    int hText = cy;
    if ( m_windowStyle & wxTE_MULTILINE )
    {
        hText *= wxMax(wxMin(GetNumberOfLines(), 10), 2);
    }
    //else: for single line control everything is ok

    // we have to add the adjustments for the control height only once, not
    // once per line, so do it after multiplication above
    hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;

    return wxSize(wText, hText);
}

// ----------------------------------------------------------------------------
// standard handlers for standard edit menu events
// ----------------------------------------------------------------------------

void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
{
    Cut();
}

void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
{
    Copy();
}

void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
{
    Paste();
}

void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
{
    Undo();
}

void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
{
    Redo();
}

void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
{
    long from, to;
    GetSelection(& from, & to);
    if (from != -1 && to != -1)
        Remove(from, to);
}

void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
{
    SetSelection(-1, -1);
}

void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
{
    event.Enable( CanCut() );
}

void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
{
    event.Enable( CanCopy() );
}

void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
{
    event.Enable( CanPaste() );
}

void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
{
    event.Enable( CanUndo() );
}

void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
{
    event.Enable( CanRedo() );
}

void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
{
    long from, to;
    GetSelection(& from, & to);
    event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
}

void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
{
    event.Enable(GetLastPosition() > 0);
}

void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
{
#if wxUSE_RICHEDIT
    if (IsRich())
    {
        if (!m_privateContextMenu)
        {
            m_privateContextMenu = new wxMenu;
            m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
            m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
            m_privateContextMenu->AppendSeparator();
            m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
            m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
            m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
            m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
            m_privateContextMenu->AppendSeparator();
            m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
        }
        PopupMenu(m_privateContextMenu);
        return;
    }
    else
#endif
    event.Skip();
}

void wxTextCtrl::OnSetFocus(wxFocusEvent& WXUNUSED(event))
{
    // be sure the caret remains invisible if the user had hidden it
    if ( !m_isNativeCaretShown )
    {
        ::HideCaret(GetHwnd());
    }
}

// ----------------------------------------------------------------------------
// Default colors for MSW text control
//
// Set default background color to the native white instead of
// the default wxSYS_COLOUR_BTNFACE (is triggered with wxNullColour).
// ----------------------------------------------------------------------------

wxVisualAttributes wxTextCtrl::GetDefaultAttributes() const
{
    wxVisualAttributes attrs;
    attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
    attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
    attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW); //white

    return attrs;
}

// the rest of the file only deals with the rich edit controls
#if wxUSE_RICHEDIT

// ----------------------------------------------------------------------------
// EN_LINK processing
// ----------------------------------------------------------------------------

bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
{
    NMHDR *hdr = (NMHDR* )lParam;
    switch ( hdr->code )
    {
       case EN_MSGFILTER:
            {
                const MSGFILTER *msgf = (MSGFILTER *)lParam;
                UINT msg = msgf->msg;

                // this is a bit crazy but richedit 1.0 sends us all mouse
                // events _except_ WM_LBUTTONUP (don't ask me why) so we have
                // generate the wxWin events for this message manually
                //
                // NB: in fact, this is still not totally correct as it does
                //     send us WM_LBUTTONUP if the selection was cleared by the
                //     last click -- so currently we get 2 events in this case,
                //     but as I don't see any obvious way to check for this I
                //     leave this code in place because it's still better than
                //     not getting left up events at all
                if ( msg == WM_LBUTTONUP )
                {
                    WXUINT flags = msgf->wParam;
                    int x = GET_X_LPARAM(msgf->lParam),
                        y = GET_Y_LPARAM(msgf->lParam);

                    HandleMouseEvent(msg, x, y, flags);
                }
            }

            // return true to process the event (and false to ignore it)
            return true;

        case EN_LINK:
            {
                const ENLINK *enlink = (ENLINK *)hdr;

                switch ( enlink->msg )
                {
                    case WM_SETCURSOR:
                        // ok, so it is hardcoded - do we really nee to
                        // custom