samples/docview/doc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/docview/doc.cpp
   3 // Purpose:     Implements document functionality
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin: merge with the MDI version and general cleanup
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 //              (c) 2008 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ----------------------------------------------------------------------------
  14 // headers
  15 // ----------------------------------------------------------------------------
  16
  17 // For compilers that support precompilation, includes "wx/wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21     #pragma hdrstop
  22 #endif
  23
  24 #if !wxUSE_DOC_VIEW_ARCHITECTURE
  25     #error You must set wxUSE_DOC_VIEW_ARCHITECTURE to 1 in setup.h!
  26 #endif
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/wx.h"
  30 #endif
  31
  32 #if wxUSE_STD_IOSTREAM
  33     #include "wx/ioswrap.h"
  34 #else
  35     #include "wx/txtstrm.h"
  36 #endif
  37 #include "wx/wfstream.h"
  38
  39 #include "doc.h"
  40 #include "view.h"
  41
  42 // ----------------------------------------------------------------------------
  43 // DrawingDocument implementation
  44 // ----------------------------------------------------------------------------
  45
  46 IMPLEMENT_DYNAMIC_CLASS(DrawingDocument, wxDocument)
  47
  48 DocumentOstream& DrawingDocument::SaveObject(DocumentOstream& ostream)
  49 {
  50 #if wxUSE_STD_IOSTREAM
  51     DocumentOstream& stream = ostream;
  52 #else
  53     wxTextOutputStream stream(ostream);
  54 #endif
  55
  56     wxDocument::SaveObject(ostream);
  57
  58     const wxInt32 count = m_doodleSegments.size();
  59     stream << count << '\n';
  60
  61     for ( int n = 0; n < count; n++ )
  62     {
  63         m_doodleSegments[n].SaveObject(ostream);
  64         stream << '\n';
  65     }
  66
  67     return ostream;
  68 }
  69
  70 DocumentIstream& DrawingDocument::LoadObject(DocumentIstream& istream)
  71 {
  72 #if wxUSE_STD_IOSTREAM
  73     DocumentIstream& stream = istream;
  74 #else
  75     wxTextInputStream stream(istream);
  76 #endif
  77
  78     wxDocument::LoadObject(istream);
  79
  80     wxInt32 count = 0;
  81     stream >> count;
  82     if ( count < 0 )
  83     {
  84         wxLogWarning("Drawing document corrupted: invalid segments count.");
  85 #if wxUSE_STD_IOSTREAM
  86         istream.clear(std::ios::badbit);
  87 #else
  88         istream.Reset(wxSTREAM_READ_ERROR);
  89 #endif
  90         return istream;
  91     }
  92
  93     for ( int n = 0; n < count; n++ )
  94     {
  95         DoodleSegment segment;
  96         segment.LoadObject(istream);
  97         m_doodleSegments.push_back(segment);
  98     }
  99
 100     return istream;
 101 }
 102
 103 void DrawingDocument::DoUpdate()
 104 {
 105     Modify(true);
 106     UpdateAllViews();
 107 }
 108
 109 void DrawingDocument::AddDoodleSegment(const DoodleSegment& segment)
 110 {
 111     m_doodleSegments.push_back(segment);
 112
 113     DoUpdate();
 114 }
 115
 116 bool DrawingDocument::PopLastSegment(DoodleSegment *segment)
 117 {
 118     if ( m_doodleSegments.empty() )
 119         return false;
 120
 121     if ( segment )
 122         *segment = m_doodleSegments.back();
 123
 124     m_doodleSegments.pop_back();
 125
 126     DoUpdate();
 127
 128     return true;
 129 }
 130
 131 // ----------------------------------------------------------------------------
 132 // DoodleSegment implementation
 133 // ----------------------------------------------------------------------------
 134
 135 DocumentOstream& DoodleSegment::SaveObject(DocumentOstream& ostream)
 136 {
 137 #if wxUSE_STD_IOSTREAM
 138     DocumentOstream& stream = ostream;
 139 #else
 140     wxTextOutputStream stream(ostream);
 141 #endif
 142
 143     const wxInt32 count = m_lines.size();
 144     stream << count << '\n';
 145
 146     for ( int n = 0; n < count; n++ )
 147     {
 148         const DoodleLine& line = m_lines[n];
 149         stream
 150             << line.x1 << ' '
 151             << line.y1 << ' '
 152             << line.x2 << ' '
 153             << line.y2 << '\n';
 154     }
 155
 156     return ostream;
 157 }
 158
 159 DocumentIstream& DoodleSegment::LoadObject(DocumentIstream& istream)
 160 {
 161 #if wxUSE_STD_IOSTREAM
 162     DocumentIstream& stream = istream;
 163 #else
 164     wxTextInputStream stream(istream);
 165 #endif
 166
 167     wxInt32 count = 0;
 168     stream >> count;
 169
 170     for ( int n = 0; n < count; n++ )
 171     {
 172         DoodleLine line;
 173         stream
 174             >> line.x1
 175             >> line.y1
 176             >> line.x2
 177             >> line.y2;
 178         m_lines.push_back(line);
 179     }
 180
 181     return istream;
 182 }
 183
 184 // ----------------------------------------------------------------------------
 185 // wxTextDocument: wxDocument and wxTextCtrl married
 186 // ----------------------------------------------------------------------------
 187
 188 IMPLEMENT_CLASS(wxTextDocument, wxDocument)
 189
 190 bool wxTextDocument::OnCreate(const wxString& path, long flags)
 191 {
 192     if ( !wxDocument::OnCreate(path, flags) )
 193         return false;
 194
 195     // subscribe to changes in the text control to update the document state
 196     // when it's modified
 197     GetTextCtrl()->Connect
 198     (
 199         wxEVT_TEXT,
 200         wxCommandEventHandler(wxTextDocument::OnTextChange),
 201         NULL,
 202         this
 203     );
 204
 205     return true;
 206 }
 207
 208 // Since text windows have their own method for saving to/loading from files,
 209 // we override DoSave/OpenDocument instead of Save/LoadObject
 210 bool wxTextDocument::DoSaveDocument(const wxString& filename)
 211 {
 212     return GetTextCtrl()->SaveFile(filename);
 213 }
 214
 215 bool wxTextDocument::DoOpenDocument(const wxString& filename)
 216 {
 217     if ( !GetTextCtrl()->LoadFile(filename) )
 218         return false;
 219
 220     // we're not modified by the user yet
 221     Modify(false);
 222
 223     return true;
 224 }
 225
 226 bool wxTextDocument::IsModified() const
 227 {
 228     wxTextCtrl* wnd = GetTextCtrl();
 229     return wxDocument::IsModified() || (wnd && wnd->IsModified());
 230 }
 231
 232 void wxTextDocument::Modify(bool modified)
 233 {
 234     wxDocument::Modify(modified);
 235
 236     wxTextCtrl* wnd = GetTextCtrl();
 237     if (wnd && !modified)
 238     {
 239         wnd->DiscardEdits();
 240     }
 241 }
 242
 243 void wxTextDocument::OnTextChange(wxCommandEvent& event)
 244 {
 245     Modify(true);
 246
 247     event.Skip();
 248 }
 249
 250 // ----------------------------------------------------------------------------
 251 // TextEditDocument implementation
 252 // ----------------------------------------------------------------------------
 253
 254 IMPLEMENT_DYNAMIC_CLASS(TextEditDocument, wxDocument)
 255
 256 wxTextCtrl* TextEditDocument::GetTextCtrl() const
 257 {
 258     wxView* view = GetFirstView();
 259     return view ? wxStaticCast(view, TextEditView)->GetText() : NULL;
 260 }
 261
 262 // ----------------------------------------------------------------------------
 263 // ImageDocument and ImageDetailsDocument implementation
 264 // ----------------------------------------------------------------------------
 265
 266 IMPLEMENT_DYNAMIC_CLASS(ImageDocument, wxDocument)
 267
 268 bool ImageDocument::DoOpenDocument(const wxString& file)
 269 {
 270     return m_image.LoadFile(file);
 271 }
 272
 273 bool ImageDocument::OnOpenDocument(const wxString& filename)
 274 {
 275     if ( !wxDocument::OnOpenDocument(filename) )
 276         return false;
 277
 278     // we don't have a wxDocTemplate for the image details document as it's
 279     // never created by wxWidgets automatically, instead just do it manually
 280     ImageDetailsDocument * const docDetails = new ImageDetailsDocument(this);
 281     docDetails->SetFilename(filename);
 282
 283     new ImageDetailsView(docDetails);
 284
 285     return true;
 286 }
 287
 288 ImageDetailsDocument::ImageDetailsDocument(ImageDocument *parent)
 289     : wxDocument(parent)
 290 {
 291     const wxImage image = parent->GetImage();
 292
 293     m_size.x = image.GetWidth();
 294     m_size.y = image.GetHeight();
 295     m_numColours = image.CountColours();
 296     m_type = image.GetType();
 297     m_hasAlpha = image.HasAlpha();
 298 }