src/common/textcmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/textcmn.cpp
   3 // Purpose:     implementation of platform-independent functions of wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     13.07.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWindows team
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrlbase.h"
  18 #endif
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_TEXTCTRL
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/intl.h"
  31     #include "wx/log.h"
  32     #include "wx/textctrl.h"
  33 #endif // WX_PRECOMP
  34
  35 #include "wx/ffile.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // macros
  39 // ----------------------------------------------------------------------------
  40
  41 // we don't have any objects of type wxTextCtrlBase in the program, only
  42 // wxTextCtrl, so this cast is safe
  43 #define TEXTCTRL(ptr)   ((wxTextCtrl *)(ptr))
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxTextUrlEvent, wxCommandEvent)
  50
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
  52 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_ENTER)
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_URL)
  54 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_MAXLEN)
  55
  56 // ----------------------------------------------------------------------------
  57 // ctor
  58 // ----------------------------------------------------------------------------
  59
  60 wxTextCtrlBase::wxTextCtrlBase()
  61 {
  62 }
  63
  64 wxTextCtrlBase::~wxTextCtrlBase()
  65 {
  66 }
  67
  68 // ----------------------------------------------------------------------------
  69 // style functions - not implemented here
  70 // ----------------------------------------------------------------------------
  71
  72 /* static */
  73 wxTextAttr wxTextAttr::Combine(const wxTextAttr& attr,
  74                                const wxTextAttr& attrDef,
  75                                const wxTextCtrlBase *text)
  76 {
  77     wxFont font = attr.GetFont();
  78     if ( !font.Ok() )
  79     {
  80         font = attrDef.GetFont();
  81
  82         if ( text && !font.Ok() )
  83             font = text->GetFont();
  84     }
  85
  86     wxColour colFg = attr.GetTextColour();
  87     if ( !colFg.Ok() )
  88     {
  89         colFg = attrDef.GetTextColour();
  90
  91         if ( text && !colFg.Ok() )
  92             colFg = text->GetForegroundColour();
  93     }
  94
  95     wxColour colBg = attr.GetBackgroundColour();
  96     if ( !colBg.Ok() )
  97     {
  98         colBg = attrDef.GetBackgroundColour();
  99
 100         if ( text && !colBg.Ok() )
 101             colBg = text->GetBackgroundColour();
 102     }
 103
 104     return wxTextAttr(colFg, colBg, font);
 105 }
 106
 107 // apply styling to text range
 108 bool wxTextCtrlBase::SetStyle(long WXUNUSED(start), long WXUNUSED(end),
 109                               const wxTextAttr& WXUNUSED(style))
 110 {
 111     // to be implemented in derived TextCtrl classes
 112     return FALSE;
 113 }
 114
 115 // change default text attributes
 116 bool wxTextCtrlBase::SetDefaultStyle(const wxTextAttr& style)
 117 {
 118     // keep the old attributes if the new style doesn't specify them unless the
 119     // new style is empty - then reset m_defaultStyle (as there is no other way
 120     // to do it)
 121     if ( style.IsDefault() )
 122         m_defaultStyle = style;
 123     else
 124         m_defaultStyle = wxTextAttr::Combine(style, m_defaultStyle, this);
 125
 126     return TRUE;
 127 }
 128
 129 // get default text attributes
 130 const wxTextAttr& wxTextCtrlBase::GetDefaultStyle() const
 131 {
 132     return m_defaultStyle;
 133 }
 134
 135 // ----------------------------------------------------------------------------
 136 // file IO functions
 137 // ----------------------------------------------------------------------------
 138
 139 bool wxTextCtrlBase::LoadFile(const wxString& filename)
 140 {
 141 #if wxUSE_FFILE
 142     wxFFile file(filename);
 143     if ( file.IsOpened() )
 144     {
 145         wxString text;
 146         if ( file.ReadAll(&text) )
 147         {
 148             SetValue(text);
 149
 150             DiscardEdits();
 151
 152             m_filename = filename;
 153
 154             return TRUE;
 155         }
 156     }
 157
 158     wxLogError(_("File couldn't be loaded."));
 159 #endif // wxUSE_FFILE
 160
 161     return FALSE;
 162 }
 163
 164 bool wxTextCtrlBase::SaveFile(const wxString& filename)
 165 {
 166     wxString filenameToUse = filename.IsEmpty() ? m_filename : filename;
 167     if ( !filenameToUse )
 168     {
 169         // what kind of message to give? is it an error or a program bug?
 170         wxLogDebug(wxT("Can't save textctrl to file without filename."));
 171
 172         return FALSE;
 173     }
 174
 175 #if wxUSE_FFILE
 176     wxFFile file(filename, "w");
 177     if ( file.IsOpened() && file.Write(GetValue()) )
 178     {
 179         // it's not modified any longer
 180         DiscardEdits();
 181
 182         m_filename = filename;
 183
 184         return TRUE;
 185     }
 186
 187     wxLogError(_("The text couldn't be saved."));
 188 #endif // wxUSE_FFILE
 189
 190     return FALSE;
 191 }
 192
 193 // ----------------------------------------------------------------------------
 194 // stream-like insertion operator
 195 // ----------------------------------------------------------------------------
 196
 197 wxTextCtrl& wxTextCtrlBase::operator<<(const wxString& s)
 198 {
 199     AppendText(s);
 200     return *TEXTCTRL(this);
 201 }
 202
 203 wxTextCtrl& wxTextCtrlBase::operator<<(float f)
 204 {
 205     wxString str;
 206     str.Printf(wxT("%.2f"), f);
 207     AppendText(str);
 208     return *TEXTCTRL(this);
 209 }
 210
 211 wxTextCtrl& wxTextCtrlBase::operator<<(double d)
 212 {
 213     wxString str;
 214     str.Printf(wxT("%.2f"), d);
 215     AppendText(str);
 216     return *TEXTCTRL(this);
 217 }
 218
 219 wxTextCtrl& wxTextCtrlBase::operator<<(int i)
 220 {
 221     wxString str;
 222     str.Printf(wxT("%d"), i);
 223     AppendText(str);
 224     return *TEXTCTRL(this);
 225 }
 226
 227 wxTextCtrl& wxTextCtrlBase::operator<<(long i)
 228 {
 229     wxString str;
 230     str.Printf(wxT("%ld"), i);
 231     AppendText(str);
 232     return *TEXTCTRL(this);
 233 }
 234
 235 wxTextCtrl& wxTextCtrlBase::operator<<(const wxChar c)
 236 {
 237     return operator<<(wxString(c));
 238 }
 239
 240 // ----------------------------------------------------------------------------
 241 // streambuf methods implementation
 242 // ----------------------------------------------------------------------------
 243
 244 #ifndef NO_TEXT_WINDOW_STREAM
 245
 246 int wxTextCtrlBase::overflow(int c)
 247 {
 248     AppendText((wxChar)c);
 249
 250     // return something different from EOF
 251     return 0;
 252 }
 253
 254 #endif // NO_TEXT_WINDOW_STREAM
 255
 256 // ----------------------------------------------------------------------------
 257 // clipboard stuff
 258 // ----------------------------------------------------------------------------
 259
 260 bool wxTextCtrlBase::CanCopy() const
 261 {
 262     // can copy if there's a selection
 263     long from, to;
 264     GetSelection(&from, &to);
 265     return from != to;
 266 }
 267
 268 bool wxTextCtrlBase::CanCut() const
 269 {
 270     // can cut if there's a selection and if we're not read only
 271     return CanCopy() && IsEditable();
 272 }
 273
 274 bool wxTextCtrlBase::CanPaste() const
 275 {
 276     // can paste if we are not read only
 277     return IsEditable();
 278 }
 279
 280 // ----------------------------------------------------------------------------
 281 // emulating key presses
 282 // ----------------------------------------------------------------------------
 283
 284 bool wxTextCtrlBase::EmulateKeyPress(const wxKeyEvent& event)
 285 {
 286     // the generic version is unused in wxMSW
 287 #ifndef __WIN32__
 288     wxChar ch;
 289     int keycode = event.GetKeyCode();
 290     switch ( keycode )
 291     {
 292         case WXK_NUMPAD0:
 293         case WXK_NUMPAD1:
 294         case WXK_NUMPAD2:
 295         case WXK_NUMPAD3:
 296         case WXK_NUMPAD4:
 297         case WXK_NUMPAD5:
 298         case WXK_NUMPAD6:
 299         case WXK_NUMPAD7:
 300         case WXK_NUMPAD8:
 301         case WXK_NUMPAD9:
 302             ch = _T('0') + keycode - WXK_NUMPAD0;
 303             break;
 304
 305         case WXK_MULTIPLY:
 306         case WXK_NUMPAD_MULTIPLY:
 307             ch = _T('*');
 308             break;
 309
 310         case WXK_ADD:
 311         case WXK_NUMPAD_ADD:
 312             ch = _T('+');
 313             break;
 314
 315         case WXK_SUBTRACT:
 316         case WXK_NUMPAD_SUBTRACT:
 317             ch = _T('-');
 318             break;
 319
 320         case WXK_DECIMAL:
 321         case WXK_NUMPAD_DECIMAL:
 322             ch = _T('.');
 323             break;
 324
 325         case WXK_DIVIDE:
 326         case WXK_NUMPAD_DIVIDE:
 327             ch = _T('/');
 328             break;
 329
 330         case WXK_DELETE:
 331         case WXK_NUMPAD_DELETE:
 332             // delete the character at cursor
 333             {
 334                 const long pos = GetInsertionPoint(),
 335                            last = GetLastPosition();
 336                 if ( pos < last )
 337                     Remove(pos, pos + 1);
 338             }
 339             break;
 340
 341         case WXK_BACK:
 342             // delete the character before the cursor
 343             {
 344                 const long pos = GetInsertionPoint();
 345                 if ( pos > 0 )
 346                     Remove(pos - 1, pos);
 347             }
 348             break;
 349
 350         default:
 351             if ( keycode < 256 && keycode >= 0 && wxIsprint(keycode) )
 352             {
 353                 // FIXME this is not going to work for non letters...
 354                 if ( !event.ShiftDown() )
 355                 {
 356                     keycode = wxTolower(keycode);
 357                 }
 358
 359                 ch = (wxChar)keycode;
 360             }
 361             else
 362             {
 363                 ch = _T('\0');
 364             }
 365     }
 366
 367     if ( ch )
 368     {
 369         WriteText(ch);
 370
 371         return TRUE;
 372     }
 373 #endif // !__WIN32__
 374
 375     return FALSE;
 376 }
 377
 378 // ----------------------------------------------------------------------------
 379 // selection and ranges
 380 // ----------------------------------------------------------------------------
 381
 382 void wxTextCtrlBase::SelectAll()
 383 {
 384     SetSelection(0, GetLastPosition());
 385 }
 386
 387 wxString wxTextCtrlBase::GetStringSelection() const
 388 {
 389     long from, to;
 390     GetSelection(&from, &to);
 391
 392     return GetRange(from, to);
 393 }
 394
 395 wxString wxTextCtrlBase::GetRange(long from, long to) const
 396 {
 397     wxString sel;
 398     if ( from < to )
 399     {
 400         sel = GetValue().Mid(from, to - from);
 401     }
 402
 403     return sel;
 404 }
 405
 406 #else // !wxUSE_TEXTCTRL
 407
 408 // define this one even if !wxUSE_TEXTCTRL because it is also used by other
 409 // controls (wxComboBox and wxSpinCtrl)
 410 #include "wx/event.h"
 411
 412 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
 413
 414 #endif // wxUSE_TEXTCTRL/!wxUSE_TEXTCTRL
 415