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 #ifndef NO_TEXT_WINDOW_STREAM
  63     #if wxUSE_IOSTREAMH
  64         if (allocate())
  65             setp(base(),ebuf());
  66     #else
  67         m_streambuf = new char[64];
  68         setp(m_streambuf, m_streambuf + 64);
  69     #endif //wxUSE_IOSTREAMH
  70 #endif // NO_TEXT_WINDOW_STREAM
  71 }
  72
  73 wxTextCtrlBase::~wxTextCtrlBase()
  74 {
  75 #ifndef NO_TEXT_WINDOW_STREAM
  76 #if !wxUSE_IOSTREAMH
  77   delete[] m_streambuf;
  78 #endif
  79 #endif
  80 }
  81
  82 // ----------------------------------------------------------------------------
  83 // style functions - not implemented here
  84 // ----------------------------------------------------------------------------
  85
  86 // apply styling to text range
  87 bool wxTextCtrlBase::SetStyle(long WXUNUSED(start), long WXUNUSED(end),
  88                               const wxTextAttr& WXUNUSED(style))
  89 {
  90     // to be implemented in derived TextCtrl classes
  91     return FALSE;
  92 }
  93
  94 // change default text attributes
  95 bool wxTextCtrlBase::SetDefaultStyle(const wxTextAttr &style)
  96 {
  97     m_defaultStyle = style;
  98     return TRUE;
  99 }
 100
 101 // get default text attributes
 102 const wxTextAttr& wxTextCtrlBase::GetDefaultStyle() const
 103 {
 104     return m_defaultStyle;
 105 }
 106
 107 // ----------------------------------------------------------------------------
 108 // file IO functions
 109 // ----------------------------------------------------------------------------
 110
 111 bool wxTextCtrlBase::LoadFile(const wxString& filename)
 112 {
 113 #if wxUSE_FFILE
 114     wxFFile file(filename);
 115     if ( file.IsOpened() )
 116     {
 117         wxString text;
 118         if ( file.ReadAll(&text) )
 119         {
 120             SetValue(text);
 121
 122             DiscardEdits();
 123
 124             m_filename = filename;
 125
 126             return TRUE;
 127         }
 128     }
 129
 130     wxLogError(_("File couldn't be loaded."));
 131 #endif // wxUSE_FFILE
 132
 133     return FALSE;
 134 }
 135
 136 bool wxTextCtrlBase::SaveFile(const wxString& filename)
 137 {
 138     wxString filenameToUse = filename.IsEmpty() ? m_filename : filename;
 139     if ( !filenameToUse )
 140     {
 141         // what kind of message to give? is it an error or a program bug?
 142         wxLogDebug(wxT("Can't save textctrl to file without filename."));
 143
 144         return FALSE;
 145     }
 146
 147 #if wxUSE_FFILE
 148     wxFFile file(filename, "w");
 149     if ( file.IsOpened() && file.Write(GetValue()) )
 150     {
 151         // it's not modified any longer
 152         DiscardEdits();
 153
 154         m_filename = filename;
 155
 156         return TRUE;
 157     }
 158
 159     wxLogError(_("The text couldn't be saved."));
 160 #endif // wxUSE_FFILE
 161
 162     return FALSE;
 163 }
 164
 165 // ----------------------------------------------------------------------------
 166 // stream-like insertion operator
 167 // ----------------------------------------------------------------------------
 168
 169 wxTextCtrl& wxTextCtrlBase::operator<<(const wxString& s)
 170 {
 171     AppendText(s);
 172     return *TEXTCTRL(this);
 173 }
 174
 175 wxTextCtrl& wxTextCtrlBase::operator<<(float f)
 176 {
 177     wxString str;
 178     str.Printf(wxT("%.2f"), f);
 179     AppendText(str);
 180     return *TEXTCTRL(this);
 181 }
 182
 183 wxTextCtrl& wxTextCtrlBase::operator<<(double d)
 184 {
 185     wxString str;
 186     str.Printf(wxT("%.2f"), d);
 187     AppendText(str);
 188     return *TEXTCTRL(this);
 189 }
 190
 191 wxTextCtrl& wxTextCtrlBase::operator<<(int i)
 192 {
 193     wxString str;
 194     str.Printf(wxT("%d"), i);
 195     AppendText(str);
 196     return *TEXTCTRL(this);
 197 }
 198
 199 wxTextCtrl& wxTextCtrlBase::operator<<(long i)
 200 {
 201     wxString str;
 202     str.Printf(wxT("%ld"), i);
 203     AppendText(str);
 204     return *TEXTCTRL(this);
 205 }
 206
 207 wxTextCtrl& wxTextCtrlBase::operator<<(const wxChar c)
 208 {
 209     return operator<<(wxString(c));
 210 }
 211
 212 // ----------------------------------------------------------------------------
 213 // streambuf methods implementation
 214 // ----------------------------------------------------------------------------
 215
 216 #ifndef NO_TEXT_WINDOW_STREAM
 217
 218 int wxTextCtrlBase::overflow( int WXUNUSED(c) )
 219 {
 220     int len = pptr() - pbase();
 221     char *txt = new char[len+1];
 222     strncpy(txt, pbase(), len);
 223     txt[len] = '\0';
 224     (*this) << txt;
 225     setp(pbase(), epptr());
 226     delete[] txt;
 227     return EOF;
 228 }
 229
 230 int wxTextCtrlBase::sync()
 231 {
 232     int len = pptr() - pbase();
 233     char *txt = new char[len+1];
 234     strncpy(txt, pbase(), len);
 235     txt[len] = '\0';
 236     (*this) << txt;
 237     setp(pbase(), epptr());
 238     delete[] txt;
 239     return 0;
 240 }
 241
 242 int wxTextCtrlBase::underflow()
 243 {
 244     return EOF;
 245 }
 246
 247 #endif // NO_TEXT_WINDOW_STREAM
 248
 249 // ----------------------------------------------------------------------------
 250 // clipboard stuff
 251 // ----------------------------------------------------------------------------
 252
 253 bool wxTextCtrlBase::CanCopy() const
 254 {
 255     // can copy if there's a selection
 256     long from, to;
 257     GetSelection(&from, &to);
 258     return from != to;
 259 }
 260
 261 bool wxTextCtrlBase::CanCut() const
 262 {
 263     // can cut if there's a selection and if we're not read only
 264     return CanCopy() && IsEditable();
 265 }
 266
 267 bool wxTextCtrlBase::CanPaste() const
 268 {
 269     // can paste if we are not read only
 270     return IsEditable();
 271 }
 272
 273 // ----------------------------------------------------------------------------
 274 // misc
 275 // ----------------------------------------------------------------------------
 276
 277 void wxTextCtrlBase::SelectAll()
 278 {
 279     SetSelection(0, GetLastPosition());
 280 }
 281
 282 #else // !wxUSE_TEXTCTRL
 283
 284 // define this one even if !wxUSE_TEXTCTRL because it is also used by other
 285 // controls (wxComboBox and wxSpinCtrl)
 286 #include "wx/event.h"
 287
 288 DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
 289
 290 #endif // wxUSE_TEXTCTRL/!wxUSE_TEXTCTRL
 291