docs/latex/wx/document.tex

   1 \section{\class{wxDocument}}\label{wxdocument}
   2
   3 The document class can be used to model an application's file-based
   4 data. It is part of the document/view framework supported by wxWindows,
   5 and cooperates with the \helpref{wxView}{wxview}, \helpref{wxDocTemplate}{wxdoctemplate}\rtfsp
   6 and \helpref{wxDocManager}{wxdocmanager} classes.
   7
   8 \wxheading{Derived from}
   9
  10 \helpref{wxEvtHandler}{wxevthandler}\\
  11 \helpref{wxObject}{wxobject}
  12
  13 \wxheading{See also}
  14
  15 \helpref{wxDocument overview}{wxdocumentoverview}, \helpref{wxView}{wxview},\rtfsp
  16 \helpref{wxDocTemplate}{wxdoctemplate}, \helpref{wxDocManager}{wxdocmanager}
  17
  18 \latexignore{\rtfignore{\wxheading{Members}}}
  19
  20 \membersection{wxDocument::m\_commandProcessor}
  21
  22 \member{wxCommandProcessor*}{m\_commandProcessor}
  23
  24 A pointer to the command processor associated with this document.
  25
  26 \membersection{wxDocument::m\_documentFile}
  27
  28 \member{wxString}{m\_documentFile}
  29
  30 Filename associated with this document (``" if none).
  31
  32 \membersection{wxDocument::m\_documentModified}
  33
  34 \member{bool}{m\_documentModified}
  35
  36 TRUE if the document has been modified, FALSE otherwise.
  37
  38 \membersection{wxDocument::m\_documentTemplate}
  39
  40 \member{wxDocTemplate *}{m\_documentTemplate}
  41
  42 A pointer to the template from which this document was created.
  43
  44 \membersection{wxDocument::m\_documentTitle}
  45
  46 \member{wxString}{m\_documentTitle}
  47
  48 Document title. The document title is used for an associated
  49 frame (if any), and is usually constructed by the framework from
  50 the filename.
  51
  52 \membersection{wxDocument::m\_documentTypeName}\label{documenttypename}
  53
  54 \member{wxString}{m\_documentTypeName}
  55
  56 The document type name given to the wxDocTemplate constructor, copied to this
  57 variable when the document is created. If several document templates are
  58 created that use the same document type, this variable is used in wxDocManager::CreateView
  59 to collate a list of alternative view types that can be used on this kind of
  60 document. Do not change the value of this variable.
  61
  62 \membersection{wxDocument::m\_documentViews}
  63
  64 \member{wxList}{m\_documentViews}
  65
  66 List of wxView instances associated with this document.
  67
  68 \membersection{wxDocument::wxDocument}
  69
  70 \func{}{wxDocument}{\void}
  71
  72 Constructor. Define your own default constructor to initialize application-specific
  73 data.
  74
  75 \membersection{wxDocument::\destruct{wxDocument}}
  76
  77 \func{}{\destruct{wxDocument}}{\void}
  78
  79 Destructor. Removes itself from the document manager.
  80
  81 \membersection{wxDocument::AddView}
  82
  83 \func{virtual bool}{AddView}{\param{wxView *}{view}}
  84
  85 If the view is not already in the list of views, adds the view and calls OnChangedViewList.
  86
  87 \membersection{wxDocument::Close}
  88
  89 \func{virtual bool}{Close}{\void}
  90
  91 Closes the document, by calling OnSaveModified and then (if this returned TRUE) OnCloseDocument.
  92 This does not normally delete the document object: use DeleteAllViews to do this implicitly.
  93
  94 \membersection{wxDocument::DeleteAllViews}
  95
  96 \func{virtual bool}{DeleteAllViews}{\void}
  97
  98 Calls wxView::Close and deletes each view. Deleting the final view will implicitly
  99 delete the document itself, because the wxView destructor calls RemoveView. This
 100 in turns calls wxDocument::OnChangedViewList, whose default implemention is to
 101 save and delete the document if no views exist.
 102
 103 \membersection{wxDocument::GetCommandProcessor}
 104
 105 \constfunc{wxCommandProcessor*}{GetCommandProcessor}{\void}
 106
 107 Returns a pointer to the command processor associated with this document.
 108
 109 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 110
 111 \membersection{wxDocument::GetDocumentTemplate}
 112
 113 \constfunc{wxDocTemplate*}{GetDocumentTemplate}{\void}
 114
 115 Gets a pointer to the template that created the document.
 116
 117 \membersection{wxDocument::GetDocumentManager}
 118
 119 \constfunc{wxDocManager*}{GetDocumentManager}{\void}
 120
 121 Gets a pointer to the associated document manager.
 122
 123 \membersection{wxDocument::GetDocumentName}
 124
 125 \constfunc{wxString}{GetDocumentName}{\void}
 126
 127 Gets the document type name for this document. See the comment for \helpref{documentTypeName}{documenttypename}.
 128
 129 \membersection{wxDocument::GetDocumentWindow}
 130
 131 \constfunc{wxWindow*}{GetDocumentWindow}{\void}
 132
 133 Intended to return a suitable window for using as a parent for document-related
 134 dialog boxes. By default, uses the frame associated with the first view.
 135
 136 \membersection{wxDocument::GetFilename}
 137
 138 \constfunc{wxString}{GetFilename}{\void}
 139
 140 Gets the filename associated with this document, or NULL if none is
 141 associated.
 142
 143 \membersection{wxDocument::GetFirstView}
 144
 145 \constfunc{wxView*}{GetFirstView}{\void}
 146
 147 A convenience function to get the first view for a document, because
 148 in many cases a document will only have a single view.
 149
 150 \membersection{wxDocument::GetPrintableName}
 151
 152 \constfunc{virtual void}{GetPrintableName}{\param{wxString\& }{name}}
 153
 154 Copies a suitable document name into the supplied {\it name} buffer. The default
 155 function uses the title, or if there is no title, uses the filename; or if no
 156 filename, the string {\bf unnamed}.
 157
 158 \membersection{wxDocument::GetTitle}
 159
 160 \constfunc{wxString}{GetTitle}{\void}
 161
 162 Gets the title for this document. The document title is used for an associated
 163 frame (if any), and is usually constructed by the framework from
 164 the filename.
 165
 166 \membersection{wxDocument::IsModified}\label{wxdocumentismodified}
 167
 168 \constfunc{virtual bool}{IsModified}{\void}
 169
 170 Returns TRUE if the document has been modified since the last save, FALSE otherwise.
 171 You may need to override this if your document view maintains its own
 172 record of being modified (for example if using wxTextWindow to view and edit the document).
 173
 174 See also \helpref{Modify}{wxdocumentmodify}.
 175
 176 \membersection{wxDocument::LoadObject}
 177
 178 \func{virtual istream\&}{LoadObject}{\param{istream\& }{stream}}
 179
 180 Override this function and call it from your own LoadObject before
 181 streaming your own data. LoadObject is called by the framework
 182 automatically when the document contents need to be loaded.
 183
 184 \membersection{wxDocument::Modify}\label{wxdocumentmodify}
 185
 186 \func{virtual void}{Modify}{\param{bool}{ modify}}
 187
 188 Call with TRUE to mark the document as modified since the last save, FALSE otherwise.
 189 You may need to override this if your document view maintains its own
 190 record of being modified (for example if using wxTextWindow to view and edit the document).
 191
 192 See also \helpref{IsModified}{wxdocumentismodified}.
 193
 194 \membersection{wxDocument::OnChangedViewList}
 195
 196 \func{virtual void}{OnChangedViewList}{\void}
 197
 198 Called when a view is added to or deleted from this document. The default
 199 implementation saves and deletes the document if no views exist (the last
 200 one has just been removed).
 201
 202 \membersection{wxDocument::OnCloseDocument}
 203
 204 \func{virtual bool}{OnCloseDocument}{\void}
 205
 206 The default implementation calls DeleteContents (an empty implementation)
 207 sets the modified flag to FALSE. Override this to
 208 supply additional behaviour when the document is closed with Close.
 209
 210 \membersection{wxDocument::OnCreate}
 211
 212 \func{virtual bool}{OnCreate}{\param{const wxString\& }{path}, \param{long}{ flags}}
 213
 214 Called just after the document object is created to give it a chance
 215 to initialize itself. The default implementation uses the
 216 template associated with the document to create an initial view.
 217 If this function returns FALSE, the document is deleted.
 218
 219 \membersection{wxDocument::OnCreateCommandProcessor}
 220
 221 \func{virtual wxCommandProcessor*}{OnCreateCommandProcessor}{\void}
 222
 223 Override this function if you want a different (or no) command processor
 224 to be created when the document is created. By default, it returns
 225 an instance of wxCommandProcessor.
 226
 227 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 228
 229 \membersection{wxDocument::OnNewDocument}
 230
 231 \func{virtual bool}{OnNewDocument}{\void}
 232
 233 The default implementation calls OnSaveModified and DeleteContents, makes a default title for the
 234 document, and notifies the views that the filename (in fact, the title) has changed.
 235
 236 \membersection{wxDocument::OnOpenDocument}
 237
 238 \func{virtual bool}{OnOpenDocument}{\param{const wxString\& }{filename}}
 239
 240 Constructs an input file stream for the given filename (which must not be NULL),
 241 and calls LoadObject. If LoadObject returns TRUE, the document is set to
 242 unmodified; otherwise, an error message box is displayed. The document's
 243 views are notified that the filename has changed, to give windows an opportunity
 244 to update their titles. All of the document's views are then updated.
 245
 246 \membersection{wxDocument::OnSaveDocument}
 247
 248 \func{virtual bool}{OnSaveDocument}{\param{const wxString\& }{filename}}
 249
 250 Constructs an output file stream for the given filename (which must not be NULL),
 251 and calls SaveObject. If SaveObject returns TRUE, the document is set to
 252 unmodified; otherwise, an error message box is displayed.
 253
 254 \membersection{wxDocument::OnSaveModified}
 255
 256 \func{virtual bool}{OnSaveModified}{\void}
 257
 258 If the document has been modified, prompts the user to ask if the changes should
 259 be changed. If the user replies Yes, the Save function is called. If No, the
 260 document is marked as unmodified and the function succeeds. If Cancel, the
 261 function fails.
 262
 263 \membersection{wxDocument::RemoveView}
 264
 265 \func{virtual bool}{RemoveView}{\param{wxView* }{view}}
 266
 267 Removes the view from the document's list of views, and calls OnChangedViewList.
 268
 269 \membersection{wxDocument::Save}
 270
 271 \func{virtual bool}{Save}{\void}
 272
 273 Saves the document by calling OnSaveDocument if there is an associated filename,
 274 or SaveAs if there is no filename.
 275
 276 \membersection{wxDocument::SaveAs}
 277
 278 \func{virtual bool}{SaveAs}{\void}
 279
 280 Prompts the user for a file to save to, and then calls OnSaveDocument.
 281
 282 \membersection{wxDocument::SaveObject}
 283
 284 \func{virtual ostream\&}{SaveObject}{\param{ostream\& }{stream}}
 285
 286 Override this function and call it from your own SaveObject before
 287 streaming your own data. SaveObject is called by the framework
 288 automatically when the document contents need to be saved.
 289
 290 \membersection{wxDocument::SetCommandProcessor}
 291
 292 \func{virtual void}{SetCommandProcessor}{\param{wxCommandProcessor *}{processor}}
 293
 294 Sets the command processor to be used for this document. The document will then be responsible
 295 for its deletion. Normally you should not call this; override OnCreateCommandProcessor
 296 instead.
 297
 298 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 299
 300 \membersection{wxDocument::SetDocumentName}
 301
 302 \func{void}{SetDocumentName}{\param{const wxString\& }{name}}
 303
 304 Sets the document type name for this document. See the comment for \helpref{documentTypeName}{documenttypename}.
 305
 306 \membersection{wxDocument::SetDocumentTemplate}
 307
 308 \func{void}{SetDocumentTemplate}{\param{wxDocTemplate* }{templ}}
 309
 310 Sets the pointer to the template that created the document. Should only be called by the
 311 framework.
 312
 313 \membersection{wxDocument::SetFilename}
 314
 315 \func{void}{SetFilename}{\param{const wxString\& }{filename}}
 316
 317 Sets the filename for this document. Usually called by the framework.
 318
 319 \membersection{wxDocument::SetTitle}
 320
 321 \func{void}{SetTitle}{\param{const wxString\& }{title}}
 322
 323 Sets the title for this document. The document title is used for an associated
 324 frame (if any), and is usually constructed by the framework from
 325 the filename.
 326
 327 \membersection{wxDocument::UpdateAllViews}\label{wxdocumentupdateallviews}
 328
 329 \func{void}{UpdateAllViews}{\param{wxView* }{sender = NULL}}
 330
 331 Updates all views. If {\it sender} is non-NULL, does not update this view.