Corrected wrong use of delete in region code.

[wxWidgets.git] / samples / text / text.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        text.cpp
// Purpose:     TextCtrl wxWindows sample
// Author:      Robert Roebling
// Modified by:
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling, Julian Smart, Vadim Zeitlin
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
    #pragma implementation "text.cpp"
#endif

// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#if wxUSE_CLIPBOARD
    #include "wx/dataobj.h"
    #include "wx/clipbrd.h"
#endif

#if wxUSE_FILE
    #include "wx/file.h"
#endif

#if wxUSE_TOOLTIPS
    #include "wx/tooltip.h"
#endif

// We test for wxUSE_DRAG_AND_DROP also, because data objects may not be
// implemented for compilers that can't cope with the OLE parts in
// wxUSE_DRAG_AND_DROP.
#if !wxUSE_DRAG_AND_DROP
    #undef wxUSE_CLIPBOARD
    #define wxUSE_CLIPBOARD 0
#endif

//----------------------------------------------------------------------
// class definitions
//----------------------------------------------------------------------

class MyApp: public wxApp
{
public:
    bool OnInit();
};

// a text ctrl which allows to call different wxTextCtrl functions
// interactively by pressing function keys in it
class MyTextCtrl : public wxTextCtrl
{
public:
    MyTextCtrl(wxWindow *parent, wxWindowID id, const wxString &value,
               const wxPoint &pos, const wxSize &size, int style = 0)
        : wxTextCtrl(parent, id, value, pos, size, style)
    {
        m_hasCapture = FALSE;
    }

    void OnKeyDown(wxKeyEvent& event);
    void OnKeyUp(wxKeyEvent& event);
    void OnChar(wxKeyEvent& event);

    void OnText(wxCommandEvent& event);
    void OnTextURL(wxTextUrlEvent& event);
    void OnTextMaxLen(wxCommandEvent& event);

    void OnMouseEvent(wxMouseEvent& event);

    static bool ms_logKey;
    static bool ms_logChar;
    static bool ms_logMouse;
    static bool ms_logText;

private:
    static inline wxChar GetChar(bool on, wxChar c) { return on ? c : _T('-'); }
    void LogEvent(const wxChar *name, wxKeyEvent& event) const;

    bool m_hasCapture;

    DECLARE_EVENT_TABLE()
};

class MyPanel: public wxPanel
{
public:
    MyPanel(wxFrame *frame, int x, int y, int w, int h);

#if wxUSE_CLIPBOARD
    void DoPasteFromClipboard();
    void DoCopyToClipboard();
#endif // wxUSE_CLIPBOARD

    void DoRemoveText();
    void DoMoveToEndOfText();
    void DoMoveToEndOfEntry();

    void OnSize( wxSizeEvent &event );

    MyTextCtrl    *m_text;
    MyTextCtrl    *m_password;
    MyTextCtrl    *m_enter;
    MyTextCtrl    *m_tab;
    MyTextCtrl    *m_readonly;
    MyTextCtrl    *m_limited;

    MyTextCtrl    *m_multitext;
    MyTextCtrl    *m_horizontal;

    MyTextCtrl    *m_textrich;

    wxTextCtrl    *m_log;

private:
    // get the currently focused text control or return the default one is no
    // text ctrl has focus
    wxTextCtrl *GetFocusedText(wxTextCtrl *textDef);

    DECLARE_EVENT_TABLE()
};

class MyFrame: public wxFrame
{
public:
    MyFrame(wxFrame *frame, const char *title, int x, int y, int w, int h);

    void OnQuit(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);
#if wxUSE_TOOLTIPS
    void OnSetTooltipDelay(wxCommandEvent& event);
    void OnToggleTooltips(wxCommandEvent& event);
#endif // wxUSE_TOOLTIPS

#if wxUSE_CLIPBOARD
    void OnPasteFromClipboard( wxCommandEvent &event )
        { m_panel->DoPasteFromClipboard(); }
    void OnCopyToClipboard( wxCommandEvent &event )
        { m_panel->DoCopyToClipboard(); }
#endif // wxUSE_CLIPBOARD

    void OnAddTextFreeze( wxCommandEvent& event )
        { DoAddText(true); }
    void OnAddText( wxCommandEvent& event )
        { DoAddText(false); }
    void OnRemoveText( wxCommandEvent& event )
        { m_panel->DoRemoveText(); }

    void OnMoveToEndOfText( wxCommandEvent &event )
        { m_panel->DoMoveToEndOfText(); }
    void OnMoveToEndOfEntry( wxCommandEvent &event )
        { m_panel->DoMoveToEndOfEntry(); }

    void OnScrollLineDown(wxCommandEvent& event)
    {
        if ( !m_panel->m_textrich->LineDown() )
            wxLogMessage(_T("Already at the bottom"));
    }

    void OnScrollLineUp(wxCommandEvent& event)
    {
        if ( !m_panel->m_textrich->LineUp() )
            wxLogMessage(_T("Already at the top"));
    }

    void OnScrollPageDown(wxCommandEvent& event)
    {
        if ( !m_panel->m_textrich->PageDown() )
            wxLogMessage(_T("Already at the bottom"));
    }

    void OnScrollPageUp(wxCommandEvent& event)
    {
        if ( !m_panel->m_textrich->PageUp() )
            wxLogMessage(_T("Already at the top"));
    }

    void OnLogClear(wxCommandEvent& event);
    void OnFileSave(wxCommandEvent& event);
    void OnFileLoad(wxCommandEvent& event);

    void OnSetEditable(wxCommandEvent& event);
    void OnSetEnabled(wxCommandEvent& event);

    void OnLogKey(wxCommandEvent& event)
    {
        MyTextCtrl::ms_logKey = event.IsChecked();
    }

    void OnLogChar(wxCommandEvent& event)
    {
        MyTextCtrl::ms_logChar = event.IsChecked();
    }

    void OnLogMouse(wxCommandEvent& event)
    {
        MyTextCtrl::ms_logMouse = event.IsChecked();
    }

    void OnLogText(wxCommandEvent& event)
    {
        MyTextCtrl::ms_logText = event.IsChecked();
    }

    void OnSetText(wxCommandEvent& event)
    {
        m_panel->m_text->SetValue(_T("Hello, world (what else did you expect)?"));
    }

    void OnIdle( wxIdleEvent& event );

private:
    void DoAddText(bool freeze)
    {
        wxTextCtrl *text = m_panel->m_textrich;
        if ( freeze )
            text->Freeze();

        for ( int i = 0; i < 100; i++ )
            text->AppendText(wxString::Format(wxT("Line %i\n"), i));

        text->SetInsertionPoint(0);

        if ( freeze )
            text->Thaw();
    }

    MyPanel *m_panel;

    DECLARE_EVENT_TABLE()
};

//----------------------------------------------------------------------
// main()
//----------------------------------------------------------------------

IMPLEMENT_APP(MyApp)

//----------------------------------------------------------------------
// MyApp
//----------------------------------------------------------------------

enum
{
    TEXT_QUIT = 100,
    TEXT_ABOUT,
    TEXT_LOAD,
    TEXT_SAVE,
    TEXT_CLEAR,

    // clipboard menu
    TEXT_CLIPBOARD_COPY = 200,
    TEXT_CLIPBOARD_PASTE,

    // tooltip menu
    TEXT_TOOLTIPS_SETDELAY = 300,
    TEXT_TOOLTIPS_ENABLE,

    // text menu
    TEXT_ADD_SOME = 400,
    TEXT_ADD_FREEZE,
    TEXT_MOVE_ENDTEXT,
    TEXT_MOVE_ENDENTRY,
    TEXT_SET_EDITABLE,
    TEXT_SET_ENABLED,
    TEXT_LINE_DOWN,
    TEXT_LINE_UP,
    TEXT_PAGE_DOWN,
    TEXT_PAGE_UP,
    TEXT_REMOVE,
    TEXT_SET,

    // log menu
    TEXT_LOG_KEY,
    TEXT_LOG_CHAR,
    TEXT_LOG_MOUSE,
    TEXT_LOG_TEXT,

    TEXT_END
};

bool MyApp::OnInit()
{
    // Create the main frame window
    MyFrame *frame = new MyFrame((wxFrame *) NULL,
            "Text wxWindows sample", 50, 50, 700, 420);
    frame->SetSizeHints( 500, 400 );

    wxMenu *file_menu = new wxMenu;
    file_menu->Append(TEXT_SAVE, "&Save file\tCtrl-S",
                      "Save the text control contents to file");
    file_menu->Append(TEXT_LOAD, "&Load file\tCtrl-O",
                      "Load the sample file into text control");
    file_menu->AppendSeparator();
    file_menu->Append(TEXT_ABOUT, "&About\tAlt-A");
    file_menu->AppendSeparator();
    file_menu->Append(TEXT_QUIT, "E&xit\tAlt-X", "Quit this sample");

    wxMenuBar *menu_bar = new wxMenuBar( wxMB_DOCKABLE );
    menu_bar->Append(file_menu, "&File");

#if wxUSE_TOOLTIPS
    wxMenu *tooltip_menu = new wxMenu;
    tooltip_menu->Append(TEXT_TOOLTIPS_SETDELAY, "Set &delay\tCtrl-D");
    tooltip_menu->AppendSeparator();
    tooltip_menu->Append(TEXT_TOOLTIPS_ENABLE, "&Toggle tooltips\tCtrl-T",
            "enable/disable tooltips", TRUE);
    tooltip_menu->Check(TEXT_TOOLTIPS_ENABLE, TRUE);
    menu_bar->Append(tooltip_menu, "&Tooltips");
#endif // wxUSE_TOOLTIPS

#if wxUSE_CLIPBOARD
    wxMenu *menuClipboard = new wxMenu;
    menuClipboard->Append(TEXT_CLIPBOARD_COPY, "&Copy\tCtrl-C",
                          "Copy the first line to the clipboard");
    menuClipboard->Append(TEXT_CLIPBOARD_PASTE, "&Paste\tCtrl-V",
                          "Paste from clipboard to the text control");
    menu_bar->Append(menuClipboard, "&Clipboard");
#endif // wxUSE_CLIPBOARD

    wxMenu *menuText = new wxMenu;
    menuText->Append(TEXT_ADD_SOME, "&Append some text\tCtrl-A");
    menuText->Append(TEXT_ADD_FREEZE, "&Append text with freeze/thaw\tShift-Ctrl-A");
    menuText->Append(TEXT_REMOVE, "&Remove first 10 characters\tCtrl-X");
    menuText->Append(TEXT_SET, "&Set the first text zone value\tCtrl-E");
    menuText->AppendSeparator();
    menuText->Append(TEXT_MOVE_ENDTEXT, "Move cursor to the end of &text");
    menuText->Append(TEXT_MOVE_ENDENTRY, "Move cursor to the end of &entry");
    menuText->Append(TEXT_SET_EDITABLE, "Toggle &editable state", "", TRUE);
    menuText->Append(TEXT_SET_ENABLED, "Toggle e&nabled state", "", TRUE);
    menuText->Check(TEXT_SET_EDITABLE, TRUE);
    menuText->Check(TEXT_SET_ENABLED, TRUE);
    menuText->AppendSeparator();
    menuText->Append(TEXT_LINE_DOWN, "Scroll text one line down");
    menuText->Append(TEXT_LINE_UP, "Scroll text one line up");
    menuText->Append(TEXT_PAGE_DOWN, "Scroll text one page down");
    menuText->Append(TEXT_PAGE_DOWN, "Scroll text one page up");
    menu_bar->Append(menuText, "Te&xt");

    wxMenu *menuLog = new wxMenu;
    menuLog->Append(TEXT_LOG_KEY, "Log &key events", "", TRUE);
    menuLog->Append(TEXT_LOG_CHAR, "Log &char events", "", TRUE);
    menuLog->Append(TEXT_LOG_MOUSE, "Log &mouse events", "", TRUE);
    menuLog->Append(TEXT_LOG_TEXT, "Log &text events", "", TRUE);
    menuLog->AppendSeparator();
    menuLog->Append(TEXT_CLEAR, "&Clear the log\tCtrl-C",
                    "Clear the log window contents");
    menuLog->Check(TEXT_LOG_KEY, TRUE);
    menuLog->Check(TEXT_LOG_CHAR, TRUE);
    menuLog->Check(TEXT_LOG_TEXT, TRUE);
    menu_bar->Append(menuLog, "&Log");

    frame->SetMenuBar(menu_bar);

    frame->Show(TRUE);

    SetTopWindow(frame);

    // report success
    return TRUE;
}

//----------------------------------------------------------------------
// MyTextCtrl
//----------------------------------------------------------------------

BEGIN_EVENT_TABLE(MyTextCtrl, wxTextCtrl)
    EVT_KEY_DOWN(MyTextCtrl::OnKeyDown)
    EVT_KEY_UP(MyTextCtrl::OnKeyUp)
    EVT_CHAR(MyTextCtrl::OnChar)

    EVT_TEXT(-1, MyTextCtrl::OnText)
    EVT_TEXT_URL(-1, MyTextCtrl::OnTextURL)
    EVT_TEXT_MAXLEN(-1, MyTextCtrl::OnTextMaxLen)

    EVT_MOUSE_EVENTS(MyTextCtrl::OnMouseEvent)
END_EVENT_TABLE()

bool MyTextCtrl::ms_logKey = TRUE;
bool MyTextCtrl::ms_logChar = TRUE;
bool MyTextCtrl::ms_logMouse = FALSE;
bool MyTextCtrl::ms_logText = TRUE;

void MyTextCtrl::LogEvent(const wxChar *name, wxKeyEvent& event) const
{
    wxString key;
    long keycode = event.KeyCode();
    {
        switch ( keycode )
        {
            case WXK_BACK: key = "BACK"; break;
            case WXK_TAB: key = "TAB"; break;
            case WXK_RETURN: key = "RETURN"; break;
            case WXK_ESCAPE: key = "ESCAPE"; break;
            case WXK_SPACE: key = "SPACE"; break;
            case WXK_DELETE: key = "DELETE"; break;
            case WXK_START: key = "START"; break;
            case WXK_LBUTTON: key = "LBUTTON"; break;
            case WXK_RBUTTON: key = "RBUTTON"; break;
            case WXK_CANCEL: key = "CANCEL"; break;
            case WXK_MBUTTON: key = "MBUTTON"; break;
            case WXK_CLEAR: key = "CLEAR"; break;
            case WXK_SHIFT: key = "SHIFT"; break;
            case WXK_ALT: key = "ALT"; break;
            case WXK_CONTROL: key = "CONTROL"; break;
            case WXK_MENU: key = "MENU"; break;
            case WXK_PAUSE: key = "PAUSE"; break;
            case WXK_CAPITAL: key = "CAPITAL"; break;
            case WXK_PRIOR: key = "PRIOR"; break;
            case WXK_NEXT: key = "NEXT"; break;
            case WXK_END: key = "END"; break;
            case WXK_HOME: key = "HOME"; break;
            case WXK_LEFT: key = "LEFT"; break;
            case WXK_UP: key = "UP"; break;
            case WXK_RIGHT: key = "RIGHT"; break;
            case WXK_DOWN: key = "DOWN"; break;
            case WXK_SELECT: key = "SELECT"; break;
            case WXK_PRINT: key = "PRINT"; break;
            case WXK_EXECUTE: key = "EXECUTE"; break;
            case WXK_SNAPSHOT: key = "SNAPSHOT"; break;
            case WXK_INSERT: key = "INSERT"; break;
            case WXK_HELP: key = "HELP"; break;
            case WXK_NUMPAD0: key = "NUMPAD0"; break;
            case WXK_NUMPAD1: key = "NUMPAD1"; break;
            case WXK_NUMPAD2: key = "NUMPAD2"; break;
            case WXK_NUMPAD3: key = "NUMPAD3"; break;
            case WXK_NUMPAD4: key = "NUMPAD4"; break;
            case WXK_NUMPAD5: key = "NUMPAD5"; break;
            case WXK_NUMPAD6: key = "NUMPAD6"; break;
            case WXK_NUMPAD7: key = "NUMPAD7"; break;
            case WXK_NUMPAD8: key = "NUMPAD8"; break;
            case WXK_NUMPAD9: key = "NUMPAD9"; break;
            case WXK_MULTIPLY: key = "MULTIPLY"; break;
            case WXK_ADD: key = "ADD"; break;
            case WXK_SEPARATOR: key = "SEPARATOR"; break;
            case WXK_SUBTRACT: key = "SUBTRACT"; break;
            case WXK_DECIMAL: key = "DECIMAL"; break;
            case WXK_DIVIDE: key = "DIVIDE"; break;
            case WXK_F1: key = "F1"; break;
            case WXK_F2: key = "F2"; break;
            case WXK_F3: key = "F3"; break;
            case WXK_F4: key = "F4"; break;
            case WXK_F5: key = "F5"; break;
            case WXK_F6: key = "F6"; break;
            case WXK_F7: key = "F7"; break;
            case WXK_F8: key = "F8"; break;
            case WXK_F9: key = "F9"; break;
            case WXK_F10: key = "F10"; break;
            case WXK_F11: key = "F11"; break;
            case WXK_F12: key = "F12"; break;
            case WXK_F13: key = "F13"; break;
            case WXK_F14: key = "F14"; break;
            case WXK_F15: key = "F15"; break;
            case WXK_F16: key = "F16"; break;
            case WXK_F17: key = "F17"; break;
            case WXK_F18: key = "F18"; break;
            case WXK_F19: key = "F19"; break;
            case WXK_F20: key = "F20"; break;
            case WXK_F21: key = "F21"; break;
            case WXK_F22: key = "F22"; break;
            case WXK_F23: key = "F23"; break;
            case WXK_F24: key = "F24"; break;
            case WXK_NUMLOCK: key = "NUMLOCK"; break;
            case WXK_SCROLL: key = "SCROLL"; break;
            case WXK_PAGEUP: key = "PAGEUP"; break;
            case WXK_PAGEDOWN: key = "PAGEDOWN"; break;
            case WXK_NUMPAD_SPACE: key = "NUMPAD_SPACE"; break;
            case WXK_NUMPAD_TAB: key = "NUMPAD_TAB"; break;
            case WXK_NUMPAD_ENTER: key = "NUMPAD_ENTER"; break;
            case WXK_NUMPAD_F1: key = "NUMPAD_F1"; break;
            case WXK_NUMPAD_F2: key = "NUMPAD_F2"; break;
            case WXK_NUMPAD_F3: key = "NUMPAD_F3"; break;
            case WXK_NUMPAD_F4: key = "NUMPAD_F4"; break;
            case WXK_NUMPAD_HOME: key = "NUMPAD_HOME"; break;
            case WXK_NUMPAD_LEFT: key = "NUMPAD_LEFT"; break;
            case WXK_NUMPAD_UP: key = "NUMPAD_UP"; break;
            case WXK_NUMPAD_RIGHT: key = "NUMPAD_RIGHT"; break;
            case WXK_NUMPAD_DOWN: key = "NUMPAD_DOWN"; break;
            case WXK_NUMPAD_PRIOR: key = "NUMPAD_PRIOR"; break;
            case WXK_NUMPAD_PAGEUP: key = "NUMPAD_PAGEUP"; break;
            case WXK_NUMPAD_PAGEDOWN: key = "NUMPAD_PAGEDOWN"; break;
            case WXK_NUMPAD_END: key = "NUMPAD_END"; break;
            case WXK_NUMPAD_BEGIN: key = "NUMPAD_BEGIN"; break;
            case WXK_NUMPAD_INSERT: key = "NUMPAD_INSERT"; break;
            case WXK_NUMPAD_DELETE: key = "NUMPAD_DELETE"; break;
            case WXK_NUMPAD_EQUAL: key = "NUMPAD_EQUAL"; break;
            case WXK_NUMPAD_MULTIPLY: key = "NUMPAD_MULTIPLY"; break;
            case WXK_NUMPAD_ADD: key = "NUMPAD_ADD"; break;
            case WXK_NUMPAD_SEPARATOR: key = "NUMPAD_SEPARATOR"; break;
            case WXK_NUMPAD_SUBTRACT: key = "NUMPAD_SUBTRACT"; break;
            case WXK_NUMPAD_DECIMAL: key = "NUMPAD_DECIMAL"; break;

            default:
            {
               if ( wxIsprint((int)keycode) )
                   key.Printf(_T("'%c'"), (char)keycode);
               else if ( keycode > 0 && keycode < 27 )
                   key.Printf(_("Ctrl-%c"), _T('A') + keycode - 1);
               else
                   key.Printf(_T("unknown (%ld)"), keycode);
            }
        }
    }

    wxLogMessage( _T("%s event: %s (flags = %c%c%c%c)"),
                  name,
                  key.c_str(),
                  GetChar( event.ControlDown(), _T('C') ),
                  GetChar( event.AltDown(), _T('A') ),
                  GetChar( event.ShiftDown(), _T('S') ),
                  GetChar( event.MetaDown(), _T('M') ) );
}

static wxString GetMouseEventDesc(const wxMouseEvent& ev)
{
    // click event
    wxString button;
    bool dbl, up;
    if ( ev.LeftDown() || ev.LeftUp() || ev.LeftDClick() )
    {
        button = _T("Left");
        dbl = ev.LeftDClick();
        up = ev.LeftUp();
    }
    else if ( ev.MiddleDown() || ev.MiddleUp() || ev.MiddleDClick() )
    {
        button = _T("Middle");
        dbl = ev.MiddleDClick();
        up = ev.MiddleUp();
    }
    else if ( ev.RightDown() || ev.RightUp() || ev.RightDClick() )
    {
        button = _T("Right");
        dbl = ev.RightDClick();
        up = ev.RightUp();
    }
    else
    {
        return _T("Unknown mouse event");
    }

    return wxString::Format(_T("%s mouse button %s"),
                            button.c_str(),
                            dbl ? _T("double clicked")
                                : up ? _T("released") : _T("clicked"));
}

void MyTextCtrl::OnMouseEvent(wxMouseEvent& ev)
{
    ev.Skip();

    if ( !ms_logMouse )
        return;

    if ( !ev.Moving() )
    {
        wxString msg;
        if ( ev.Entering() )
        {
            msg = _T("Mouse entered the window");
        }
        else if ( ev.Leaving() )
        {
            msg = _T("Mouse left the window");
        }
        else
        {
            msg = GetMouseEventDesc(ev);
        }

        msg << _T(" at (") << ev.GetX() << _T(", ") << ev.GetY() << _T(") ")
            << _T("Flags: ")
            << GetChar( ev.LeftIsDown(), _T('1') )
            << GetChar( ev.MiddleIsDown(), _T('2') )
            << GetChar( ev.RightIsDown(), _T('3') )
            << GetChar( ev.ControlDown(), _T('C') )
            << GetChar( ev.AltDown(), _T('A') )
            << GetChar( ev.ShiftDown(), _T('S') )
            << GetChar( ev.MetaDown(), _T('M') );

        wxLogMessage(msg);
    }
    //else: we're not interested in mouse move events
}

void MyTextCtrl::OnText(wxCommandEvent& event)
{
    if ( !ms_logText )
        return;

    MyTextCtrl *win = (MyTextCtrl *)event.GetEventObject();
    const wxChar *data = (const wxChar *)(win->GetClientData());
    if ( data )
    {
        wxLogMessage(_T("Text changed in control '%s'"), data);
    }
    else
    {
        wxLogMessage(_T("Text changed in some control"));
    }
}

void MyTextCtrl::OnTextMaxLen(wxCommandEvent& event)
{
    wxLogMessage(_T("You can't enter more characters into this control."));
}

void MyTextCtrl::OnTextURL(wxTextUrlEvent& event)
{
    const wxMouseEvent& ev = event.GetMouseEvent();

    // filter out mouse moves, too many of them
    if ( ev.Moving() )
        return;

    long start = event.GetURLStart(),
         end = event.GetURLEnd();

    wxLogMessage(_T("Mouse event over URL '%s': %s"),
                 GetValue().Mid(start, end - start).c_str(),
                 GetMouseEventDesc(ev).c_str());
}

void MyTextCtrl::OnChar(wxKeyEvent& event)
{
    if ( ms_logChar )
        LogEvent( _T("Char"), event);

    event.Skip();
}

void MyTextCtrl::OnKeyUp(wxKeyEvent& event)
{
    if ( ms_logKey )
        LogEvent( _T("Key up"), event);

    event.Skip();
}

void MyTextCtrl::OnKeyDown(wxKeyEvent& event)
{
    switch ( event.KeyCode() )
    {
        case WXK_F1:
            // show current position and text length
            {
                long line, column, pos = GetInsertionPoint();
                PositionToXY(pos, &column, &line);

                wxLogMessage( _T("Current position: %ld\nCurrent line, column: (%ld, %ld)\nNumber of lines: %ld\nCurrent line length: %ld\nTotal text length: %u (%ld)"),
                        pos,
                        line, column,
                        GetNumberOfLines(),
                        GetLineLength(line),
                        GetValue().length(),
                        GetLastPosition());
            }
            break;

        case WXK_F2:
            // go to the end
            SetInsertionPointEnd();
            break;

        case WXK_F3:
            // go to position 10
            SetInsertionPoint(10);
            break;

        case WXK_F4:
            if (!m_hasCapture)
            {
                wxLogDebug( wxT("Now capturing mouse and events.") );
                m_hasCapture = TRUE;
                CaptureMouse();
            }
            else
            {
                wxLogDebug( wxT("Stopped capturing mouse and events.") );
                m_hasCapture = FALSE;
                ReleaseMouse();
            }
            break;

        case WXK_F5:
            // insert a blank line
            WriteText("\n");
            break;

        case WXK_F6:
            SetValue("F6 was just pressed.");
            break;

        case WXK_F7:
            ShowPosition(10);
            break;

        case WXK_F10:
            {
                long from, to;
                GetSelection(&from, &to);

                wxString sel = GetStringSelection();

                wxLogMessage(_T("Selection: from %ld to %ld."), from, to);
                wxLogMessage(_T("Selection = '%s' (len = %u)"),
                             sel.c_str(), sel.length());
            }
    }

    if ( ms_logKey )
        LogEvent( wxT("Key down"), event);

    event.Skip();
}

//----------------------------------------------------------------------
// MyPanel
//----------------------------------------------------------------------

BEGIN_EVENT_TABLE(MyPanel, wxPanel)
    EVT_SIZE(MyPanel::OnSize)
END_EVENT_TABLE()

MyPanel::MyPanel( wxFrame *frame, int x, int y, int w, int h )
       : wxPanel( frame, -1, wxPoint(x, y), wxSize(w, h) )
{
    m_log = new wxTextCtrl( this, -1, "This is the log window.\n",
                            wxPoint(5,260), wxSize(630,100),
                            wxTE_MULTILINE | wxTE_READONLY /* | wxTE_RICH */);

    wxLog *old_log = wxLog::SetActiveTarget( new wxLogTextCtrl( m_log ) );

    delete old_log;

    // single line text controls

    m_text = new MyTextCtrl( this, -1, "Single line.",
                             wxPoint(10,10), wxSize(140,-1),
                             wxTE_PROCESS_ENTER);
    m_text->SetForegroundColour(*wxBLUE);
    m_text->SetBackgroundColour(*wxLIGHT_GREY);
    (*m_text) << " Appended.";
    m_text->SetInsertionPoint(0);
    m_text->WriteText( "Prepended. " );

    m_password = new MyTextCtrl( this, -1, "",
      wxPoint(10,50), wxSize(140,-1), wxTE_PASSWORD );

    m_readonly = new MyTextCtrl( this, -1, "Read only",
      wxPoint(10,90), wxSize(140,-1), wxTE_READONLY );

    m_limited = new MyTextCtrl(this, -1, "Max 8 ch",
                              wxPoint(10, 130), wxSize(140, -1));
    m_limited->SetMaxLength(8);

    // multi line text controls

    m_horizontal = new MyTextCtrl( this, -1, "Multiline text control with a horizontal scrollbar.",
      wxPoint(10,170), wxSize(140,70), wxTE_MULTILINE | wxHSCROLL );

    // a little hack to use the command line argument for encoding testing
    if ( wxTheApp->argc == 2 )
    {
        switch ( wxTheApp->argv[1][0] )
        {
            case '2':
                m_horizontal->SetFont(wxFont(18, wxSWISS, wxNORMAL, wxNORMAL,
                                             FALSE, "",
                                             wxFONTENCODING_ISO8859_2));