samples/docvwmdi/doc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        doc.cpp
   3 // Purpose:     Implements document functionality
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 // #pragma implementation
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx/wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/wx.h"
  25 #endif
  26 #include "wx/txtstrm.h"
  27
  28 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  29 #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
  30 #endif
  31
  32 #include "doc.h"
  33 #include "view.h"
  34
  35 IMPLEMENT_DYNAMIC_CLASS(DrawingDocument, wxDocument)
  36
  37 DrawingDocument::DrawingDocument(void)
  38 {
  39 }
  40
  41 DrawingDocument::~DrawingDocument(void)
  42 {
  43   doodleSegments.DeleteContents(TRUE);
  44 }
  45
  46 #if wxUSE_STD_IOSTREAM
  47 wxSTD ostream& DrawingDocument::SaveObject(wxSTD ostream& stream)
  48 {
  49   wxDocument::SaveObject(stream);
  50
  51   wxInt32 n = doodleSegments.GetCount();
  52   stream << n << _T('\n');
  53
  54   wxNode *node = doodleSegments.GetFirst();
  55   while (node)
  56   {
  57     DoodleSegment *segment = (DoodleSegment *)node->GetData();
  58     segment->SaveObject(stream);
  59     stream << _T('\n');
  60
  61     node = node->GetNext();
  62   }
  63
  64   return stream;
  65 }
  66 #else
  67 wxOutputStream& DrawingDocument::SaveObject(wxOutputStream& stream)
  68 {
  69   wxDocument::SaveObject(stream);
  70
  71   wxTextOutputStream text_stream( stream );
  72
  73   wxInt32 n = doodleSegments.GetCount();
  74   text_stream << n << _T('\n');
  75
  76   wxNode *node = doodleSegments.GetFirst();
  77   while (node)
  78   {
  79     DoodleSegment *segment = (DoodleSegment *)node->GetData();
  80     segment->SaveObject(stream);
  81     text_stream << _T('\n');
  82
  83     node = node->GetNext();
  84   }
  85
  86   return stream;
  87 }
  88 #endif
  89
  90 #if wxUSE_STD_IOSTREAM
  91 wxSTD istream& DrawingDocument::LoadObject(wxSTD istream& stream)
  92 {
  93   wxDocument::LoadObject(stream);
  94
  95   wxInt32 n = 0;
  96   stream >> n;
  97
  98   for (int i = 0; i < n; i++)
  99   {
 100     DoodleSegment *segment = new DoodleSegment;
 101     segment->LoadObject(stream);
 102     doodleSegments.Append(segment);
 103   }
 104
 105   return stream;
 106 }
 107 #else
 108 wxInputStream& DrawingDocument::LoadObject(wxInputStream& stream)
 109 {
 110   wxDocument::LoadObject(stream);
 111
 112   wxTextInputStream text_stream( stream );
 113
 114   wxInt32 n = 0;
 115   text_stream >> n;
 116
 117   for (int i = 0; i < n; i++)
 118   {
 119     DoodleSegment *segment = new DoodleSegment;
 120     segment->LoadObject(stream);
 121     doodleSegments.Append(segment);
 122   }
 123
 124   return stream;
 125 }
 126 #endif
 127 DoodleSegment::DoodleSegment(void)
 128 {
 129 }
 130
 131 DoodleSegment::DoodleSegment(DoodleSegment& seg)
 132 {
 133   wxNode *node = seg.lines.GetFirst();
 134   while (node)
 135   {
 136     DoodleLine *line = (DoodleLine *)node->GetData();
 137     DoodleLine *newLine = new DoodleLine;
 138     newLine->x1 = line->x1;
 139     newLine->y1 = line->y1;
 140     newLine->x2 = line->x2;
 141     newLine->y2 = line->y2;
 142
 143     lines.Append(newLine);
 144
 145     node = node->GetNext();
 146   }
 147 }
 148
 149 DoodleSegment::~DoodleSegment(void)
 150 {
 151   lines.DeleteContents(TRUE);
 152 }
 153
 154 #if wxUSE_STD_IOSTREAM
 155 wxSTD ostream& DoodleSegment::SaveObject(wxSTD ostream& stream)
 156 {
 157   wxInt32 n = lines.GetCount();
 158   stream << n << _T('\n');
 159
 160   wxNode *node = lines.GetFirst();
 161   while (node)
 162   {
 163     DoodleLine *line = (DoodleLine *)node->GetData();
 164     stream << line->x1 << _T(" ") <<
 165                    line->y1 << _T(" ") <<
 166            line->x2 << _T(" ") <<
 167            line->y2 << _T("\n");
 168     node = node->GetNext();
 169   }
 170
 171   return stream;
 172 }
 173 #else
 174 wxOutputStream &DoodleSegment::SaveObject(wxOutputStream& stream)
 175 {
 176   wxTextOutputStream text_stream( stream );
 177
 178   wxInt32 n = lines.GetCount();
 179   text_stream << n << _T('\n');
 180
 181   wxNode *node = lines.GetFirst();
 182   while (node)
 183   {
 184     DoodleLine *line = (DoodleLine *)node->GetData();
 185     text_stream << line->x1 << _T(" ") <<
 186                    line->y1 << _T(" ") <<
 187            line->x2 << _T(" ") <<
 188            line->y2 << _T("\n");
 189     node = node->GetNext();
 190   }
 191
 192   return stream;
 193 }
 194 #endif
 195
 196 #if wxUSE_STD_IOSTREAM
 197 wxSTD istream& DoodleSegment::LoadObject(wxSTD istream& stream)
 198 {
 199   wxInt32 n = 0;
 200   stream >> n;
 201
 202   for (int i = 0; i < n; i++)
 203   {
 204     DoodleLine *line = new DoodleLine;
 205     stream >> line->x1 >>
 206                    line->y1 >>
 207            line->x2 >>
 208            line->y2;
 209     lines.Append(line);
 210   }
 211
 212   return stream;
 213 }
 214 #else
 215 wxInputStream &DoodleSegment::LoadObject(wxInputStream& stream)
 216 {
 217   wxTextInputStream text_stream( stream );
 218
 219   wxInt32 n = 0;
 220   text_stream >> n;
 221
 222   for (int i = 0; i < n; i++)
 223   {
 224     DoodleLine *line = new DoodleLine;
 225     text_stream >> line->x1 >>
 226                    line->y1 >>
 227            line->x2 >>
 228            line->y2;
 229     lines.Append(line);
 230   }
 231
 232   return stream;
 233 }
 234 #endif
 235 void DoodleSegment::Draw(wxDC *dc)
 236 {
 237   wxNode *node = lines.GetFirst();
 238   while (node)
 239   {
 240     DoodleLine *line = (DoodleLine *)node->GetData();
 241     dc->DrawLine(line->x1, line->y1, line->x2, line->y2);
 242     node = node->GetNext();
 243   }
 244 }
 245
 246 /*
 247  * Implementation of drawing command
 248  */
 249
 250 DrawingCommand::DrawingCommand(const wxString& name, int command, DrawingDocument *ddoc, DoodleSegment *seg):
 251   wxCommand(TRUE, name)
 252 {
 253   doc = ddoc;
 254   segment = seg;
 255   cmd = command;
 256 }
 257
 258 DrawingCommand::~DrawingCommand(void)
 259 {
 260   if (segment)
 261     delete segment;
 262 }
 263
 264 bool DrawingCommand::Do(void)
 265 {
 266   switch (cmd)
 267   {
 268     case DOODLE_CUT:
 269     {
 270       // Cut the last segment
 271       if (doc->GetDoodleSegments().GetCount() > 0)
 272       {
 273         wxNode *node = doc->GetDoodleSegments().GetLast();
 274         if (segment)
 275           delete segment;
 276
 277         segment = (DoodleSegment *)node->GetData();
 278         delete node;
 279
 280         doc->Modify(TRUE);
 281         doc->UpdateAllViews();
 282       }
 283       break;
 284     }
 285     case DOODLE_ADD:
 286     {
 287       doc->GetDoodleSegments().Append(new DoodleSegment(*segment));
 288       doc->Modify(TRUE);
 289       doc->UpdateAllViews();
 290       break;
 291     }
 292   }
 293   return TRUE;
 294 }
 295
 296 bool DrawingCommand::Undo(void)
 297 {
 298   switch (cmd)
 299   {
 300     case DOODLE_CUT:
 301     {
 302       // Paste the segment
 303       if (segment)
 304       {
 305         doc->GetDoodleSegments().Append(segment);
 306         doc->Modify(TRUE);
 307         doc->UpdateAllViews();
 308         segment = (DoodleSegment *) NULL;
 309       }
 310       doc->Modify(TRUE);
 311       doc->UpdateAllViews();
 312       break;
 313     }
 314     case DOODLE_ADD:
 315     {
 316       // Cut the last segment
 317       if (doc->GetDoodleSegments().GetCount() > 0)
 318       {
 319         wxNode *node = doc->GetDoodleSegments().GetLast();
 320         DoodleSegment *seg = (DoodleSegment *)node->GetData();
 321         delete seg;
 322         delete node;
 323
 324         doc->Modify(TRUE);
 325         doc->UpdateAllViews();
 326       }
 327     }
 328   }
 329   return TRUE;
 330 }
 331
 332 IMPLEMENT_DYNAMIC_CLASS(TextEditDocument, wxDocument)
 333
 334 // Since text windows have their own method for saving to/loading from files,
 335 // we override OnSave/OpenDocument instead of Save/LoadObject
 336 bool TextEditDocument::OnSaveDocument(const wxString& filename)
 337 {
 338     TextEditView *view = (TextEditView *)GetFirstView();
 339
 340     if (!view->textsw->SaveFile(filename))
 341         return FALSE;
 342     Modify(FALSE);
 343     return TRUE;
 344 }
 345
 346 bool TextEditDocument::OnOpenDocument(const wxString& filename)
 347 {
 348     TextEditView *view = (TextEditView *)GetFirstView();
 349     if (!view->textsw->LoadFile(filename))
 350         return FALSE;
 351
 352     SetFilename(filename, TRUE);
 353     Modify(FALSE);
 354     UpdateAllViews();
 355     return TRUE;
 356 }
 357
 358 bool TextEditDocument::IsModified(void) const
 359 {
 360   TextEditView *view = (TextEditView *)GetFirstView();
 361   if (view)
 362   {
 363     return (wxDocument::IsModified() || view->textsw->IsModified());
 364   }
 365   else
 366     return wxDocument::IsModified();
 367 }
 368
 369 void TextEditDocument::Modify(bool mod)
 370 {
 371   TextEditView *view = (TextEditView *)GetFirstView();
 372
 373   wxDocument::Modify(mod);
 374
 375   if (!mod && view && view->textsw)
 376     view->textsw->DiscardEdits();
 377 }