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
  27 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  28 #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in wx_setup.h!
  29 #endif
  30
  31 #include "doc.h"
  32 #include "view.h"
  33
  34 IMPLEMENT_DYNAMIC_CLASS(DrawingDocument, wxDocument)
  35
  36 DrawingDocument::DrawingDocument(void)
  37 {
  38 }
  39
  40 DrawingDocument::~DrawingDocument(void)
  41 {
  42   doodleSegments.DeleteContents(TRUE);
  43 }
  44
  45 ostream& DrawingDocument::SaveObject(ostream& stream)
  46 {
  47   wxDocument::SaveObject(stream);
  48
  49   stream << doodleSegments.Number() << '\n';
  50   wxNode *node = doodleSegments.First();
  51   while (node)
  52   {
  53     DoodleSegment *segment = (DoodleSegment *)node->Data();
  54     segment->SaveObject(stream);
  55     stream << '\n';
  56
  57     node = node->Next();
  58   }
  59   return stream;
  60 }
  61
  62 istream& DrawingDocument::LoadObject(istream& stream)
  63 {
  64   wxDocument::LoadObject(stream);
  65
  66   int n = 0;
  67   stream >> n;
  68
  69   for (int i = 0; i < n; i++)
  70   {
  71     DoodleSegment *segment = new DoodleSegment;
  72     segment->LoadObject(stream);
  73     doodleSegments.Append(segment);
  74   }
  75
  76   return stream;
  77 }
  78
  79 DoodleSegment::DoodleSegment(void)
  80 {
  81 }
  82
  83 DoodleSegment::DoodleSegment(DoodleSegment& seg)
  84 {
  85   wxNode *node = seg.lines.First();
  86   while (node)
  87   {
  88     DoodleLine *line = (DoodleLine *)node->Data();
  89     DoodleLine *newLine = new DoodleLine;
  90     newLine->x1 = line->x1;
  91     newLine->y1 = line->y1;
  92     newLine->x2 = line->x2;
  93     newLine->y2 = line->y2;
  94
  95     lines.Append(newLine);
  96
  97     node = node->Next();
  98   }
  99 }
 100
 101 DoodleSegment::~DoodleSegment(void)
 102 {
 103   lines.DeleteContents(TRUE);
 104 }
 105
 106 ostream& DoodleSegment::SaveObject(ostream& stream)
 107 {
 108   stream << lines.Number() << '\n';
 109   wxNode *node = lines.First();
 110   while (node)
 111   {
 112     DoodleLine *line = (DoodleLine *)node->Data();
 113     stream << line->x1 << " " << line->y1 << " " << line->x2 << " " << line->y2 << "\n";
 114     node = node->Next();
 115   }
 116   return stream;
 117 }
 118
 119 istream& DoodleSegment::LoadObject(istream& stream)
 120 {
 121   int n = 0;
 122   stream >> n;
 123
 124   for (int i = 0; i < n; i++)
 125   {
 126     DoodleLine *line = new DoodleLine;
 127     stream >> line->x1 >> line->y1 >> line->x2 >> line->y2;
 128     lines.Append(line);
 129   }
 130   return stream;
 131 }
 132
 133 void DoodleSegment::Draw(wxDC *dc)
 134 {
 135   wxNode *node = lines.First();
 136   while (node)
 137   {
 138     DoodleLine *line = (DoodleLine *)node->Data();
 139     dc->DrawLine(line->x1, line->y1, line->x2, line->y2);
 140     node = node->Next();
 141   }
 142 }
 143
 144 /*
 145  * Implementation of drawing command
 146  */
 147
 148 DrawingCommand::DrawingCommand(const wxString& name, int command, DrawingDocument *ddoc, DoodleSegment *seg):
 149   wxCommand(TRUE, name)
 150 {
 151   doc = ddoc;
 152   segment = seg;
 153   cmd = command;
 154 }
 155
 156 DrawingCommand::~DrawingCommand(void)
 157 {
 158   if (segment)
 159     delete segment;
 160 }
 161
 162 bool DrawingCommand::Do(void)
 163 {
 164   switch (cmd)
 165   {
 166     case DOODLE_CUT:
 167     {
 168       // Cut the last segment
 169       if (doc->GetDoodleSegments().Number() > 0)
 170       {
 171         wxNode *node = doc->GetDoodleSegments().Last();
 172         if (segment)
 173           delete segment;
 174
 175         segment = (DoodleSegment *)node->Data();
 176         delete node;
 177
 178         doc->Modify(TRUE);
 179         doc->UpdateAllViews();
 180       }
 181       break;
 182     }
 183     case DOODLE_ADD:
 184     {
 185       doc->GetDoodleSegments().Append(new DoodleSegment(*segment));
 186       doc->Modify(TRUE);
 187       doc->UpdateAllViews();
 188       break;
 189     }
 190   }
 191   return TRUE;
 192 }
 193
 194 bool DrawingCommand::Undo(void)
 195 {
 196   switch (cmd)
 197   {
 198     case DOODLE_CUT:
 199     {
 200       // Paste the segment
 201       if (segment)
 202       {
 203         doc->GetDoodleSegments().Append(segment);
 204         doc->Modify(TRUE);
 205         doc->UpdateAllViews();
 206         segment = (DoodleSegment *) NULL;
 207       }
 208       doc->Modify(TRUE);
 209       doc->UpdateAllViews();
 210       break;
 211     }
 212     case DOODLE_ADD:
 213     {
 214       // Cut the last segment
 215       if (doc->GetDoodleSegments().Number() > 0)
 216       {
 217         wxNode *node = doc->GetDoodleSegments().Last();
 218         DoodleSegment *seg = (DoodleSegment *)node->Data();
 219         delete seg;
 220         delete node;
 221
 222         doc->Modify(TRUE);
 223         doc->UpdateAllViews();
 224       }
 225     }
 226   }
 227   return TRUE;
 228 }
 229
 230 IMPLEMENT_DYNAMIC_CLASS(TextEditDocument, wxDocument)
 231
 232 // Since text windows have their own method for saving to/loading from files,
 233 // we override OnSave/OpenDocument instead of Save/LoadObject
 234 bool TextEditDocument::OnSaveDocument(const wxString& filename)
 235 {
 236     TextEditView *view = (TextEditView *)GetFirstView();
 237
 238     if (!view->textsw->SaveFile(filename))
 239         return FALSE;
 240     Modify(FALSE);
 241     return TRUE;
 242 }
 243
 244 bool TextEditDocument::OnOpenDocument(const wxString& filename)
 245 {
 246     TextEditView *view = (TextEditView *)GetFirstView();
 247     if (!view->textsw->LoadFile(filename))
 248         return FALSE;
 249
 250     SetFilename(filename, TRUE);
 251     Modify(FALSE);
 252     UpdateAllViews();
 253     return TRUE;
 254 }
 255
 256 bool TextEditDocument::IsModified(void) const
 257 {
 258   TextEditView *view = (TextEditView *)GetFirstView();
 259   if (view)
 260   {
 261     return (wxDocument::IsModified() || view->textsw->IsModified());
 262   }
 263   else
 264     return wxDocument::IsModified();
 265 }
 266
 267 void TextEditDocument::Modify(bool mod)
 268 {
 269   TextEditView *view = (TextEditView *)GetFirstView();
 270
 271   wxDocument::Modify(mod);
 272
 273   if (!mod && view && view->textsw)
 274     view->textsw->DiscardEdits();
 275 }