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{Include files}
  14
  15 <wx/docview.h>
  16
  17 \wxheading{See also}
  18
  19 \helpref{wxDocument overview}{wxdocumentoverview}, \helpref{wxView}{wxview},\rtfsp
  20 \helpref{wxDocTemplate}{wxdoctemplate}, \helpref{wxDocManager}{wxdocmanager}
  21
  22 \latexignore{\rtfignore{\wxheading{Members}}}
  23
  24 \membersection{wxDocument::m\_commandProcessor}
  25
  26 \member{wxCommandProcessor*}{m\_commandProcessor}
  27
  28 A pointer to the command processor associated with this document.
  29
  30 \membersection{wxDocument::m\_documentFile}
  31
  32 \member{wxString}{m\_documentFile}
  33
  34 Filename associated with this document (``" if none).
  35
  36 \membersection{wxDocument::m\_documentModified}
  37
  38 \member{bool}{m\_documentModified}
  39
  40 TRUE if the document has been modified, FALSE otherwise.
  41
  42 \membersection{wxDocument::m\_documentTemplate}
  43
  44 \member{wxDocTemplate *}{m\_documentTemplate}
  45
  46 A pointer to the template from which this document was created.
  47
  48 \membersection{wxDocument::m\_documentTitle}
  49
  50 \member{wxString}{m\_documentTitle}
  51
  52 Document title. The document title is used for an associated
  53 frame (if any), and is usually constructed by the framework from
  54 the filename.
  55
  56 \membersection{wxDocument::m\_documentTypeName}\label{documenttypename}
  57
  58 \member{wxString}{m\_documentTypeName}
  59
  60 The document type name given to the wxDocTemplate constructor, copied to this
  61 variable when the document is created. If several document templates are
  62 created that use the same document type, this variable is used in wxDocManager::CreateView
  63 to collate a list of alternative view types that can be used on this kind of
  64 document. Do not change the value of this variable.
  65
  66 \membersection{wxDocument::m\_documentViews}
  67
  68 \member{wxList}{m\_documentViews}
  69
  70 List of wxView instances associated with this document.
  71
  72 \membersection{wxDocument::wxDocument}
  73
  74 \func{}{wxDocument}{\void}
  75
  76 Constructor. Define your own default constructor to initialize application-specific
  77 data.
  78
  79 \membersection{wxDocument::\destruct{wxDocument}}
  80
  81 \func{}{\destruct{wxDocument}}{\void}
  82
  83 Destructor. Removes itself from the document manager.
  84
  85 \membersection{wxDocument::AddView}
  86
  87 \func{virtual bool}{AddView}{\param{wxView *}{view}}
  88
  89 If the view is not already in the list of views, adds the view and calls OnChangedViewList.
  90
  91 \membersection{wxDocument::Close}
  92
  93 \func{virtual bool}{Close}{\void}
  94
  95 Closes the document, by calling OnSaveModified and then (if this returned TRUE) OnCloseDocument.
  96 This does not normally delete the document object: use DeleteAllViews to do this implicitly.
  97
  98 \membersection{wxDocument::DeleteAllViews}
  99
 100 \func{virtual bool}{DeleteAllViews}{\void}
 101
 102 Calls wxView::Close and deletes each view. Deleting the final view will implicitly
 103 delete the document itself, because the wxView destructor calls RemoveView. This
 104 in turns calls wxDocument::OnChangedViewList, whose default implemention is to
 105 save and delete the document if no views exist.
 106
 107 \membersection{wxDocument::GetCommandProcessor}
 108
 109 \constfunc{wxCommandProcessor*}{GetCommandProcessor}{\void}
 110
 111 Returns a pointer to the command processor associated with this document.
 112
 113 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 114
 115 \membersection{wxDocument::GetDocumentTemplate}
 116
 117 \constfunc{wxDocTemplate*}{GetDocumentTemplate}{\void}
 118
 119 Gets a pointer to the template that created the document.
 120
 121 \membersection{wxDocument::GetDocumentManager}
 122
 123 \constfunc{wxDocManager*}{GetDocumentManager}{\void}
 124
 125 Gets a pointer to the associated document manager.
 126
 127 \membersection{wxDocument::GetDocumentName}
 128
 129 \constfunc{wxString}{GetDocumentName}{\void}
 130
 131 Gets the document type name for this document. See the comment for \helpref{documentTypeName}{documenttypename}.
 132
 133 \membersection{wxDocument::GetDocumentWindow}
 134
 135 \constfunc{wxWindow*}{GetDocumentWindow}{\void}
 136
 137 Intended to return a suitable window for using as a parent for document-related
 138 dialog boxes. By default, uses the frame associated with the first view.
 139
 140 \membersection{wxDocument::GetFilename}
 141
 142 \constfunc{wxString}{GetFilename}{\void}
 143
 144 Gets the filename associated with this document, or "" if none is
 145 associated.
 146
 147 \membersection{wxDocument::GetFirstView}\label{wxdocumentgetfirstview}
 148
 149 \constfunc{wxView *}{GetFirstView}{\void}
 150
 151 A convenience function to get the first view for a document, because
 152 in many cases a document will only have a single view.
 153
 154 See also: \helpref{GetViews}{wxdocumentgetviews}
 155
 156 \membersection{wxDocument::GetPrintableName}
 157
 158 \constfunc{virtual void}{GetPrintableName}{\param{wxString\& }{name}}
 159
 160 Copies a suitable document name into the supplied {\it name} buffer. The default
 161 function uses the title, or if there is no title, uses the filename; or if no
 162 filename, the string {\bf unnamed}.
 163
 164 \membersection{wxDocument::GetTitle}
 165
 166 \constfunc{wxString}{GetTitle}{\void}
 167
 168 Gets the title for this document. The document title is used for an associated
 169 frame (if any), and is usually constructed by the framework from
 170 the filename.
 171
 172 \membersection{wxDocument::GetViews}\label{wxdocumentgetviews}
 173
 174 \constfunc{wxList \&}{GetViews}{\void}
 175
 176 Returns the list whose elements are the views on the document.
 177
 178 See also: \helpref{GetFirstView}{wxdocumentgetfirstview}
 179
 180 \membersection{wxDocument::IsModified}\label{wxdocumentismodified}
 181
 182 \constfunc{virtual bool}{IsModified}{\void}
 183
 184 Returns TRUE if the document has been modified since the last save, FALSE otherwise.
 185 You may need to override this if your document view maintains its own
 186 record of being modified (for example if using wxTextWindow to view and edit the document).
 187
 188 See also \helpref{Modify}{wxdocumentmodify}.
 189
 190 \membersection{wxDocument::LoadObject}
 191
 192 \func{virtual istream\&}{LoadObject}{\param{istream\& }{stream}}
 193
 194 Override this function and call it from your own LoadObject before
 195 streaming your own data. LoadObject is called by the framework
 196 automatically when the document contents need to be loaded.
 197
 198 \membersection{wxDocument::Modify}\label{wxdocumentmodify}
 199
 200 \func{virtual void}{Modify}{\param{bool}{ modify}}
 201
 202 Call with TRUE to mark the document as modified since the last save, FALSE otherwise.
 203 You may need to override this if your document view maintains its own
 204 record of being modified (for example if using wxTextWindow to view and edit the document).
 205
 206 See also \helpref{IsModified}{wxdocumentismodified}.
 207
 208 \membersection{wxDocument::OnChangedViewList}
 209
 210 \func{virtual void}{OnChangedViewList}{\void}
 211
 212 Called when a view is added to or deleted from this document. The default
 213 implementation saves and deletes the document if no views exist (the last
 214 one has just been removed).
 215
 216 \membersection{wxDocument::OnCloseDocument}
 217
 218 \func{virtual bool}{OnCloseDocument}{\void}
 219
 220 The default implementation calls DeleteContents (an empty implementation)
 221 sets the modified flag to FALSE. Override this to
 222 supply additional behaviour when the document is closed with Close.
 223
 224 \membersection{wxDocument::OnCreate}
 225
 226 \func{virtual bool}{OnCreate}{\param{const wxString\& }{path}, \param{long}{ flags}}
 227
 228 Called just after the document object is created to give it a chance
 229 to initialize itself. The default implementation uses the
 230 template associated with the document to create an initial view.
 231 If this function returns FALSE, the document is deleted.
 232
 233 \membersection{wxDocument::OnCreateCommandProcessor}
 234
 235 \func{virtual wxCommandProcessor*}{OnCreateCommandProcessor}{\void}
 236
 237 Override this function if you want a different (or no) command processor
 238 to be created when the document is created. By default, it returns
 239 an instance of wxCommandProcessor.
 240
 241 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 242
 243 \membersection{wxDocument::OnNewDocument}
 244
 245 \func{virtual bool}{OnNewDocument}{\void}
 246
 247 The default implementation calls OnSaveModified and DeleteContents, makes a default title for the
 248 document, and notifies the views that the filename (in fact, the title) has changed.
 249
 250 \membersection{wxDocument::OnOpenDocument}
 251
 252 \func{virtual bool}{OnOpenDocument}{\param{const wxString\& }{filename}}
 253
 254 Constructs an input file stream for the given filename (which must not be empty),
 255 and calls LoadObject. If LoadObject returns TRUE, the document is set to
 256 unmodified; otherwise, an error message box is displayed. The document's
 257 views are notified that the filename has changed, to give windows an opportunity
 258 to update their titles. All of the document's views are then updated.
 259
 260 \membersection{wxDocument::OnSaveDocument}
 261
 262 \func{virtual bool}{OnSaveDocument}{\param{const wxString\& }{filename}}
 263
 264 Constructs an output file stream for the given filename (which must not be empty),
 265 and calls SaveObject. If SaveObject returns TRUE, the document is set to
 266 unmodified; otherwise, an error message box is displayed.
 267
 268 \membersection{wxDocument::OnSaveModified}
 269
 270 \func{virtual bool}{OnSaveModified}{\void}
 271
 272 If the document has been modified, prompts the user to ask if the changes should
 273 be changed. If the user replies Yes, the Save function is called. If No, the
 274 document is marked as unmodified and the function succeeds. If Cancel, the
 275 function fails.
 276
 277 \membersection{wxDocument::RemoveView}
 278
 279 \func{virtual bool}{RemoveView}{\param{wxView* }{view}}
 280
 281 Removes the view from the document's list of views, and calls OnChangedViewList.
 282
 283 \membersection{wxDocument::Save}
 284
 285 \func{virtual bool}{Save}{\void}
 286
 287 Saves the document by calling OnSaveDocument if there is an associated filename,
 288 or SaveAs if there is no filename.
 289
 290 \membersection{wxDocument::SaveAs}
 291
 292 \func{virtual bool}{SaveAs}{\void}
 293
 294 Prompts the user for a file to save to, and then calls OnSaveDocument.
 295
 296 \membersection{wxDocument::SaveObject}
 297
 298 \func{virtual ostream\&}{SaveObject}{\param{ostream\& }{stream}}
 299
 300 Override this function and call it from your own SaveObject before
 301 streaming your own data. SaveObject is called by the framework
 302 automatically when the document contents need to be saved.
 303
 304 \membersection{wxDocument::SetCommandProcessor}
 305
 306 \func{virtual void}{SetCommandProcessor}{\param{wxCommandProcessor *}{processor}}
 307
 308 Sets the command processor to be used for this document. The document will then be responsible
 309 for its deletion. Normally you should not call this; override OnCreateCommandProcessor
 310 instead.
 311
 312 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 313
 314 \membersection{wxDocument::SetDocumentName}
 315
 316 \func{void}{SetDocumentName}{\param{const wxString\& }{name}}
 317
 318 Sets the document type name for this document. See the comment for \helpref{documentTypeName}{documenttypename}.
 319
 320 \membersection{wxDocument::SetDocumentTemplate}
 321
 322 \func{void}{SetDocumentTemplate}{\param{wxDocTemplate* }{templ}}
 323
 324 Sets the pointer to the template that created the document. Should only be called by the
 325 framework.
 326
 327 \membersection{wxDocument::SetFilename}
 328
 329 \func{void}{SetFilename}{\param{const wxString\& }{filename}}
 330
 331 Sets the filename for this document. Usually called by the framework.
 332
 333 \membersection{wxDocument::SetTitle}
 334
 335 \func{void}{SetTitle}{\param{const wxString\& }{title}}
 336
 337 Sets the title for this document. The document title is used for an associated
 338 frame (if any), and is usually constructed by the framework from
 339 the filename.
 340
 341 \membersection{wxDocument::UpdateAllViews}\label{wxdocumentupdateallviews}
 342
 343 \func{void}{UpdateAllViews}{\param{wxView* }{sender = NULL}}
 344
 345 Updates all views. If {\it sender} is non-NULL, does not update this view.
 346