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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 wxTextAttr::wxTextAttr(const wxColour& colText,
  73                const wxColour& colBack,
  74                const wxFont& font,
  75                wxTextAttrAlignment alignment)
  76     : m_colText(colText), m_colBack(colBack), m_font(font), m_textAlignment(alignment)
  77 {
  78     m_flags = 0;
  79     m_leftIndent = 0;
  80     m_rightIndent = 0;
  81     if (m_colText.Ok()) m_flags |= wxTEXT_ATTR_TEXT_COLOUR;
  82     if (m_colBack.Ok()) m_flags |= wxTEXT_ATTR_BACKGROUND_COLOUR;
  83     if (m_font.Ok()) m_flags |= wxTEXT_ATTR_FONT;
  84     if (alignment != wxTEXT_ALIGNMENT_DEFAULT)
  85         m_flags |= wxTEXT_ATTR_ALIGNMENT;
  86 }
  87
  88 void wxTextAttr::Init()
  89 {
  90     m_textAlignment = wxTEXT_ALIGNMENT_DEFAULT;
  91     m_flags = 0;
  92     m_leftIndent = 0;
  93     m_rightIndent = 0;
  94 }
  95
  96 /* static */
  97 wxTextAttr wxTextAttr::Combine(const wxTextAttr& attr,
  98                                const wxTextAttr& attrDef,
  99                                const wxTextCtrlBase *text)
 100 {
 101     wxFont font = attr.GetFont();
 102     if ( !font.Ok() )
 103     {
 104         font = attrDef.GetFont();
 105
 106         if ( text && !font.Ok() )
 107             font = text->GetFont();
 108     }
 109
 110     wxColour colFg = attr.GetTextColour();
 111     if ( !colFg.Ok() )
 112     {
 113         colFg = attrDef.GetTextColour();
 114
 115         if ( text && !colFg.Ok() )
 116             colFg = text->GetForegroundColour();
 117     }
 118
 119     wxColour colBg = attr.GetBackgroundColour();
 120     if ( !colBg.Ok() )
 121     {
 122         colBg = attrDef.GetBackgroundColour();
 123
 124         if ( text && !colBg.Ok() )
 125             colBg = text->GetBackgroundColour();
 126     }
 127
 128     wxTextAttr newAttr(colFg, colBg, font);
 129
 130     if (attr.HasAlignment())
 131         newAttr.SetAlignment(attr.GetAlignment());
 132     else if (attrDef.HasAlignment())
 133         newAttr.SetAlignment(attrDef.GetAlignment());
 134
 135     if (attr.HasTabs())
 136         newAttr.SetTabs(attr.GetTabs());
 137     else if (attrDef.HasTabs())
 138         newAttr.SetTabs(attrDef.GetTabs());
 139
 140     if (attr.HasLeftIndent())
 141         newAttr.SetLeftIndent(attr.GetLeftIndent());
 142     else if (attrDef.HasLeftIndent())
 143         newAttr.SetLeftIndent(attrDef.GetLeftIndent());
 144
 145     if (attr.HasRightIndent())
 146         newAttr.SetRightIndent(attr.GetRightIndent());
 147     else if (attrDef.HasRightIndent())
 148         newAttr.SetRightIndent(attrDef.GetRightIndent());
 149
 150     return newAttr;
 151 }
 152
 153 void wxTextAttr::operator= (const wxTextAttr& attr)
 154 {
 155     m_font = attr.m_font;
 156     m_colText = attr.m_colText;
 157     m_colBack = attr.m_colBack;
 158     m_textAlignment = attr.m_textAlignment;
 159     m_leftIndent = attr.m_leftIndent;
 160     m_rightIndent = attr.m_rightIndent;
 161     m_tabs = attr.m_tabs;
 162     m_flags = attr.m_flags;
 163 }
 164
 165
 166 // apply styling to text range
 167 bool wxTextCtrlBase::SetStyle(long WXUNUSED(start), long WXUNUSED(end),
 168                               const wxTextAttr& WXUNUSED(style))
 169 {
 170     // to be implemented in derived TextCtrl classes
 171     return FALSE;
 172 }
 173
 174 // get the styling at the given position
 175 bool wxTextCtrlBase::GetStyle(long WXUNUSED(position), wxTextAttr& WXUNUSED(style))
 176 {
 177     // to be implemented in derived TextCtrl classes
 178     return FALSE;
 179 }
 180
 181 // change default text attributes
 182 bool wxTextCtrlBase::SetDefaultStyle(const wxTextAttr& style)
 183 {
 184     // keep the old attributes if the new style doesn't specify them unless the
 185     // new style is empty - then reset m_defaultStyle (as there is no other way
 186     // to do it)
 187     if ( style.IsDefault() )
 188         m_defaultStyle = style;
 189     else
 190         m_defaultStyle = wxTextAttr::Combine(style, m_defaultStyle, this);
 191
 192     return TRUE;
 193 }
 194
 195 // get default text attributes
 196 const wxTextAttr& wxTextCtrlBase::GetDefaultStyle() const
 197 {
 198     return m_defaultStyle;
 199 }
 200
 201 // ----------------------------------------------------------------------------
 202 // file IO functions
 203 // ----------------------------------------------------------------------------
 204
 205 bool wxTextCtrlBase::LoadFile(const wxString& filename)
 206 {
 207 #if wxUSE_FFILE
 208     wxFFile file(filename);
 209     if ( file.IsOpened() )
 210     {
 211         wxString text;
 212         if ( file.ReadAll(&text) )
 213         {
 214             SetValue(text);
 215
 216             DiscardEdits();
 217
 218             m_filename = filename;
 219
 220             return TRUE;
 221         }
 222     }
 223
 224     wxLogError(_("File couldn't be loaded."));
 225 #endif // wxUSE_FFILE
 226
 227     return FALSE;
 228 }
 229
 230 bool wxTextCtrlBase::SaveFile(const wxString& filename)
 231 {
 232     wxString filenameToUse = filename.IsEmpty() ? m_filename : filename;
 233     if ( filenameToUse.empty() )
 234     {
 235         // what kind of message to give? is it an error or a program bug?
 236         wxLogDebug(wxT("Can't save textctrl to file without filename."));
 237
 238         return FALSE;
 239     }
 240
 241 #if wxUSE_FFILE
 242     wxFFile file(filenameToUse, _T("w"));
 243     if ( file.IsOpened() && file.Write(GetValue()) )
 244     {
 245         // it's not modified any longer
 246         DiscardEdits();
 247
 248         // if it worked, save for future calls
 249         m_filename = filenameToUse;
 250
 251         return TRUE;
 252     }
 253 #endif // wxUSE_FFILE
 254
 255     wxLogError(_("The text couldn't be saved."));
 256
 257     return FALSE;
 258 }
 259
 260 // ----------------------------------------------------------------------------
 261 // stream-like insertion operator
 262 // ----------------------------------------------------------------------------
 263
 264 wxTextCtrl& wxTextCtrlBase::operator<<(const wxString& s)
 265 {
 266     AppendText(s);
 267     return *TEXTCTRL(this);
 268 }
 269
 270 wxTextCtrl& wxTextCtrlBase::operator<<(float f)
 271 {
 272     wxString str;
 273     str.Printf(wxT("%.2f"), f);
 274     AppendText(str);
 275     return *TEXTCTRL(this);
 276 }
 277
 278 wxTextCtrl& wxTextCtrlBase::operator<<(double d)
 279 {
 280     wxString str;
 281     str.Printf(wxT("%.2f"), d);
 282     AppendText(str);
 283     return *TEXTCTRL(this);
 284 }
 285
 286 wxTextCtrl& wxTextCtrlBase::operator<<(int i)
 287 {
 288     wxString str;
 289     str.Printf(wxT("%d"), i);
 290     AppendText(str);
 291     return *TEXTCTRL(this);
 292 }
 293
 294 wxTextCtrl& wxTextCtrlBase::operator<<(long i)
 295 {
 296     wxString str;
 297     str.Printf(wxT("%ld"), i);
 298     AppendText(str);
 299     return *TEXTCTRL(this);
 300 }
 301
 302 wxTextCtrl& wxTextCtrlBase::operator<<(const wxChar c)
 303 {
 304     return operator<<(wxString(c));
 305 }
 306
 307 // ----------------------------------------------------------------------------
 308 // streambuf methods implementation
 309 // ----------------------------------------------------------------------------
 310
 311 #ifndef NO_TEXT_WINDOW_STREAM
 312
 313 int wxTextCtrlBase::overflow(int c)
 314 {
 315     AppendText((wxChar)c);
 316
 317     // return something different from EOF
 318     return 0;
 319 }
 320
 321 #endif // NO_TEXT_WINDOW_STREAM
 322
 323 // ----------------------------------------------------------------------------
 324 // clipboard stuff
 325 // ----------------------------------------------------------------------------
 326
 327 bool wxTextCtrlBase::CanCopy() const
 328 {
 329     // can copy if there's a selection
 330     long from, to;
 331     GetSelection(&from, &to);
 332     return from != to;
 333 }
 334
 335 bool wxTextCtrlBase::CanCut() const
 336 {
 337     // can cut if there's a selection and if we're not read only
 338     return CanCopy() && IsEditable();
 339 }
 340
 341 bool wxTextCtrlBase::CanPaste() const
 342 {
 343     // can paste if we are not read only
 344     return IsEditable();
 345 }
 346
 347 // ----------------------------------------------------------------------------
 348 // emulating key presses
 349 // ----------------------------------------------------------------------------
 350
 351 #ifdef __WIN32__
 352 // the generic version is unused in wxMSW
 353 bool wxTextCtrlBase::EmulateKeyPress(const wxKeyEvent& WXUNUSED(event))
 354 {
 355     return FALSE;
 356 }
 357 #else // !__WIN32__
 358 bool wxTextCtrlBase::EmulateKeyPress(const wxKeyEvent& event)
 359 {
 360     wxChar ch = 0;
 361     int keycode = event.GetKeyCode();
 362     switch ( keycode )
 363     {
 364         case WXK_NUMPAD0:
 365         case WXK_NUMPAD1:
 366         case WXK_NUMPAD2:
 367         case WXK_NUMPAD3:
 368         case WXK_NUMPAD4:
 369         case WXK_NUMPAD5:
 370         case WXK_NUMPAD6:
 371         case WXK_NUMPAD7:
 372         case WXK_NUMPAD8:
 373         case WXK_NUMPAD9:
 374             ch = _T('0') + keycode - WXK_NUMPAD0;
 375             break;
 376
 377         case WXK_MULTIPLY:
 378         case WXK_NUMPAD_MULTIPLY:
 379             ch = _T('*');
 380             break;
 381
 382         case WXK_ADD:
 383         case WXK_NUMPAD_ADD:
 384             ch = _T('+');
 385             break;
 386
 387         case WXK_SUBTRACT:
 388         case WXK_NUMPAD_SUBTRACT:
 389             ch = _T('-');
 390             break;
 391
 392         case WXK_DECIMAL:
 393         case WXK_NUMPAD_DECIMAL:
 394             ch = _T('.');
 395             break;
 396
 397         case WXK_DIVIDE:
 398         case WXK_NUMPAD_DIVIDE:
 399             ch = _T('/');
 400             break;
 401
 402         case WXK_DELETE:
 403         case WXK_NUMPAD_DELETE:
 404             // delete the character at cursor
 405             {
 406                 const long pos = GetInsertionPoint(),
 407                            last = GetLastPosition();
 408                 if ( pos < last )
 409                     Remove(pos, pos + 1);
 410             }
 411             break;
 412
 413         case WXK_BACK:
 414             // delete the character before the cursor
 415             {
 416                 const long pos = GetInsertionPoint();
 417                 if ( pos > 0 )
 418                     Remove(pos - 1, pos);
 419             }
 420             break;
 421
 422         default:
 423             if ( keycode < 256 && keycode >= 0 && wxIsprint(keycode) )
 424             {
 425                 // FIXME this is not going to work for non letters...
 426                 if ( !event.ShiftDown() )
 427                 {
 428                     keycode = wxTolower(keycode);
 429                 }
 430
 431                 ch = (wxChar)keycode;
 432             }
 433             else
 434             {
 435                 ch = _T('\0');
 436             }
 437     }
 438
 439     if ( ch )
 440     {
 441         WriteText(ch);
 442
 443         return TRUE;
 444     }
 445
 446     return FALSE;
 447 }
 448 #endif // !__WIN32__
 449
 450 // ----------------------------------------------------------------------------
 451 // selection and ranges
 452 // ----------------------------------------------------------------------------
 453
 454 void wxTextCtrlBase::SelectAll()
 455 {
 456     SetSelection(0, GetLastPosition());
 457 }
 458
 459 wxString wxTextCtrlBase::GetStringSelection() const
 460 {
 461     long from, to;
 462     GetSelection(&from, &to);
 463
 464     return GetRange(from, to);
 465 }
 466
 467 wxString wxTextCtrlBase::GetRange(long from, long to) const
 468 {
 469     wxString sel;
 470     if ( from < to )
 471     {
 472         sel = GetValue().Mid(from, to - from);
 473     }
 474
 475     return sel;
 476 }
 477
 478 // do the window-specific processing after processing the update event
 479 void wxTextCtrlBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
 480 {
 481     if ( event.GetSetEnabled() )
 482         Enable(event.GetEnabled());
 483
 484     if ( event.GetSetText() )
 485     {
 486         if ( event.GetText() != GetValue() )
 487             SetValue(event.GetText());
 488     }
 489 }
 490
 491
 492 #else // !wxUSE_TEXTCTRL
 493
 494 // define this one even if !wxUSE_TEXTCTRL because it is also used by other
 495 // controls (wxComboBox and wxSpinCtrl)
 496 #include "wx/event.h"
 497
 498 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
 499
 500 #endif // wxUSE_TEXTCTRL/!wxUSE_TEXTCTRL
 501