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