samples/docview/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 #ifdef __WXMAC__
  28 #include "wx/filename.h"
  29 #endif
  30
  31 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  32 #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
  33 #endif
  34
  35 #include "doc.h"
  36 #include "view.h"
  37 IMPLEMENT_DYNAMIC_CLASS(DrawingDocument, wxDocument)
  38
  39 DrawingDocument::DrawingDocument(void)
  40 {
  41 }
  42
  43 DrawingDocument::~DrawingDocument(void)
  44 {
  45     doodleSegments.DeleteContents(TRUE);
  46 }
  47
  48 #if wxUSE_STD_IOSTREAM
  49 wxSTD ostream& DrawingDocument::SaveObject(wxSTD ostream& stream)
  50 {
  51     wxDocument::SaveObject(stream);
  52
  53     wxInt32 n = doodleSegments.GetCount();
  54     stream << n << '\n';
  55
  56     wxNode *node = doodleSegments.GetFirst();
  57     while (node)
  58     {
  59         DoodleSegment *segment = (DoodleSegment *)node->GetData();
  60         segment->SaveObject(stream);
  61         stream << '\n';
  62
  63         node = node->GetNext();
  64     }
  65
  66     return stream;
  67 }
  68 #else
  69 wxOutputStream& DrawingDocument::SaveObject(wxOutputStream& stream)
  70 {
  71     wxDocument::SaveObject(stream);
  72
  73     wxTextOutputStream text_stream( stream );
  74
  75     wxInt32 n = doodleSegments.GetCount();
  76     text_stream << n << '\n';
  77
  78     wxNode *node = doodleSegments.GetFirst();
  79     while (node)
  80     {
  81         DoodleSegment *segment = (DoodleSegment *)node->GetData();
  82         segment->SaveObject(stream);
  83         text_stream << '\n';
  84
  85         node = node->GetNext();
  86     }
  87
  88     return stream;
  89 }
  90 #endif
  91
  92 #if wxUSE_STD_IOSTREAM
  93 wxSTD istream& DrawingDocument::LoadObject(wxSTD istream& stream)
  94 {
  95     wxDocument::LoadObject(stream);
  96
  97     wxInt32 n = 0;
  98     stream >> n;
  99
 100     for (int i = 0; i < n; i++)
 101     {
 102         DoodleSegment *segment = new DoodleSegment;
 103         segment->LoadObject(stream);
 104         doodleSegments.Append(segment);
 105     }
 106
 107     return stream;
 108 }
 109 #else
 110 wxInputStream& DrawingDocument::LoadObject(wxInputStream& stream)
 111 {
 112     wxDocument::LoadObject(stream);
 113
 114     wxTextInputStream text_stream( stream );
 115
 116     wxInt32 n = 0;
 117     text_stream >> n;
 118
 119     for (int i = 0; i < n; i++)
 120     {
 121         DoodleSegment *segment = new DoodleSegment;
 122         segment->LoadObject(stream);
 123         doodleSegments.Append(segment);
 124     }
 125
 126     return stream;
 127 }
 128 #endif
 129
 130 DoodleSegment::DoodleSegment(void)
 131 {
 132 }
 133
 134 DoodleSegment::DoodleSegment(DoodleSegment& seg)
 135 {
 136     wxNode *node = seg.lines.GetFirst();
 137     while (node)
 138     {
 139         DoodleLine *line = (DoodleLine *)node->GetData();
 140         DoodleLine *newLine = new DoodleLine;
 141         newLine->x1 = line->x1;
 142         newLine->y1 = line->y1;
 143         newLine->x2 = line->x2;
 144         newLine->y2 = line->y2;
 145
 146         lines.Append(newLine);
 147
 148         node = node->GetNext();
 149     }
 150 }
 151
 152 DoodleSegment::~DoodleSegment(void)
 153 {
 154     lines.DeleteContents(TRUE);
 155 }
 156
 157 #if wxUSE_STD_IOSTREAM
 158 wxSTD ostream& DoodleSegment::SaveObject(wxSTD ostream& stream)
 159 {
 160     wxInt32 n = lines.GetCount();
 161     stream << n << '\n';
 162
 163     wxNode *node = lines.GetFirst();
 164     while (node)
 165     {
 166         DoodleLine *line = (DoodleLine *)node->GetData();
 167         stream << line->x1 << " " <<
 168             line->y1 << " " <<
 169             line->x2 << " " <<
 170             line->y2 << "\n";
 171         node = node->GetNext();
 172     }
 173
 174     return stream;
 175 }
 176 #else
 177 wxOutputStream &DoodleSegment::SaveObject(wxOutputStream& stream)
 178 {
 179     wxTextOutputStream text_stream( stream );
 180
 181     wxInt32 n = lines.GetCount();
 182     text_stream << n << _T('\n');
 183
 184     wxNode *node = lines.GetFirst();
 185     while (node)
 186     {
 187         DoodleLine *line = (DoodleLine *)node->GetData();
 188         text_stream << line->x1 << _T(" ") <<
 189             line->y1 << _T(" ") <<
 190             line->x2 << _T(" ") <<
 191             line->y2 << _T("\n");
 192         node = node->GetNext();
 193     }
 194
 195     return stream;
 196 }
 197 #endif
 198
 199 #if wxUSE_STD_IOSTREAM
 200 wxSTD istream& DoodleSegment::LoadObject(wxSTD istream& stream)
 201 {
 202     wxInt32 n = 0;
 203     stream >> n;
 204
 205     for (int i = 0; i < n; i++)
 206     {
 207         DoodleLine *line = new DoodleLine;
 208         stream >> line->x1 >>
 209             line->y1 >>
 210             line->x2 >>
 211             line->y2;
 212         lines.Append(line);
 213     }
 214
 215     return stream;
 216 }
 217 #else
 218 wxInputStream &DoodleSegment::LoadObject(wxInputStream& stream)
 219 {
 220     wxTextInputStream text_stream( stream );
 221
 222     wxInt32 n = 0;
 223     text_stream >> n;
 224
 225     for (int i = 0; i < n; i++)
 226     {
 227         DoodleLine *line = new DoodleLine;
 228         text_stream >> line->x1 >>
 229             line->y1 >>
 230             line->x2 >>
 231             line->y2;
 232         lines.Append(line);
 233     }
 234
 235     return stream;
 236 }
 237 #endif
 238
 239 void DoodleSegment::Draw(wxDC *dc)
 240 {
 241     wxNode *node = lines.GetFirst();
 242     while (node)
 243     {
 244         DoodleLine *line = (DoodleLine *)node->GetData();
 245         dc->DrawLine(line->x1, line->y1, line->x2, line->y2);
 246         node = node->GetNext();
 247     }
 248 }
 249
 250 /*
 251 * Implementation of drawing command
 252 */
 253
 254 DrawingCommand::DrawingCommand(const wxString& name, int command, DrawingDocument *ddoc, DoodleSegment *seg):
 255 wxCommand(TRUE, name)
 256 {
 257     doc = ddoc;
 258     segment = seg;
 259     cmd = command;
 260 }
 261
 262 DrawingCommand::~DrawingCommand(void)
 263 {
 264     if (segment)
 265         delete segment;
 266 }
 267
 268 bool DrawingCommand::Do(void)
 269 {
 270     switch (cmd)
 271     {
 272     case DOODLE_CUT:
 273         {
 274             // Cut the last segment
 275             if (doc->GetDoodleSegments().GetCount() > 0)
 276             {
 277                 wxNode *node = doc->GetDoodleSegments().GetLast();
 278                 if (segment)
 279                     delete segment;
 280
 281                 segment = (DoodleSegment *)node->GetData();
 282                 delete node;
 283
 284                 doc->Modify(TRUE);
 285                 doc->UpdateAllViews();
 286             }
 287             break;
 288         }
 289     case DOODLE_ADD:
 290         {
 291             doc->GetDoodleSegments().Append(new DoodleSegment(*segment));
 292             doc->Modify(TRUE);
 293             doc->UpdateAllViews();
 294             break;
 295         }
 296     }
 297     return TRUE;
 298 }
 299
 300 bool DrawingCommand::Undo(void)
 301 {
 302     switch (cmd)
 303     {
 304     case DOODLE_CUT:
 305         {
 306             // Paste the segment
 307             if (segment)
 308             {
 309                 doc->GetDoodleSegments().Append(segment);
 310                 doc->Modify(TRUE);
 311                 doc->UpdateAllViews();
 312                 segment = (DoodleSegment *) NULL;
 313             }
 314             doc->Modify(TRUE);
 315             doc->UpdateAllViews();
 316             break;
 317         }
 318     case DOODLE_ADD:
 319         {
 320             // Cut the last segment
 321             if (doc->GetDoodleSegments().GetCount() > 0)
 322             {
 323                 wxNode *node = doc->GetDoodleSegments().GetLast();
 324                 DoodleSegment *seg = (DoodleSegment *)node->GetData();
 325                 delete seg;
 326                 delete node;
 327
 328                 doc->Modify(TRUE);
 329                 doc->UpdateAllViews();
 330             }
 331         }
 332     }
 333     return TRUE;
 334 }
 335
 336 IMPLEMENT_DYNAMIC_CLASS(TextEditDocument, wxDocument)
 337
 338 // Since text windows have their own method for saving to/loading from files,
 339 // we override OnSave/OpenDocument instead of Save/LoadObject
 340 bool TextEditDocument::OnSaveDocument(const wxString& filename)
 341 {
 342     TextEditView *view = (TextEditView *)GetFirstView();
 343
 344     if (!view->textsw->SaveFile(filename))
 345         return FALSE;
 346     Modify(FALSE);
 347 #ifdef __WXMAC__
 348     wxFileName fn(filename) ;
 349     fn.MacSetDefaultTypeAndCreator() ;
 350 #endif
 351     return TRUE;
 352 }
 353
 354 bool TextEditDocument::OnOpenDocument(const wxString& filename)
 355 {
 356     TextEditView *view = (TextEditView *)GetFirstView();
 357     if (!view->textsw->LoadFile(filename))
 358         return FALSE;
 359
 360     SetFilename(filename, TRUE);
 361     Modify(FALSE);
 362     UpdateAllViews();
 363     return TRUE;
 364 }
 365
 366 bool TextEditDocument::IsModified(void) const
 367 {
 368     TextEditView *view = (TextEditView *)GetFirstView();
 369     if (view)
 370     {
 371         return (wxDocument::IsModified() || view->textsw->IsModified());
 372     }
 373     else
 374         return wxDocument::IsModified();
 375 }
 376
 377 void TextEditDocument::Modify(bool mod)
 378 {
 379     TextEditView *view = (TextEditView *)GetFirstView();
 380
 381     wxDocument::Modify(mod);
 382
 383     if (!mod && view && view->textsw)
 384         view->textsw->DiscardEdits();
 385 }