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 NULL if none is
 145 associated.
 146
 147 \membersection{wxDocument::GetFirstView}
 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 \membersection{wxDocument::GetPrintableName}
 155
 156 \constfunc{virtual void}{GetPrintableName}{\param{wxString\& }{name}}
 157
 158 Copies a suitable document name into the supplied {\it name} buffer. The default
 159 function uses the title, or if there is no title, uses the filename; or if no
 160 filename, the string {\bf unnamed}.
 161
 162 \membersection{wxDocument::GetTitle}
 163
 164 \constfunc{wxString}{GetTitle}{\void}
 165
 166 Gets the title for this document. The document title is used for an associated
 167 frame (if any), and is usually constructed by the framework from
 168 the filename.
 169
 170 \membersection{wxDocument::IsModified}\label{wxdocumentismodified}
 171
 172 \constfunc{virtual bool}{IsModified}{\void}
 173
 174 Returns TRUE if the document has been modified since the last save, FALSE otherwise.
 175 You may need to override this if your document view maintains its own
 176 record of being modified (for example if using wxTextWindow to view and edit the document).
 177
 178 See also \helpref{Modify}{wxdocumentmodify}.
 179
 180 \membersection{wxDocument::LoadObject}
 181
 182 \func{virtual istream\&}{LoadObject}{\param{istream\& }{stream}}
 183
 184 Override this function and call it from your own LoadObject before
 185 streaming your own data. LoadObject is called by the framework
 186 automatically when the document contents need to be loaded.
 187
 188 \membersection{wxDocument::Modify}\label{wxdocumentmodify}
 189
 190 \func{virtual void}{Modify}{\param{bool}{ modify}}
 191
 192 Call with TRUE to mark the document as modified since the last save, FALSE otherwise.
 193 You may need to override this if your document view maintains its own
 194 record of being modified (for example if using wxTextWindow to view and edit the document).
 195
 196 See also \helpref{IsModified}{wxdocumentismodified}.
 197
 198 \membersection{wxDocument::OnChangedViewList}
 199
 200 \func{virtual void}{OnChangedViewList}{\void}
 201
 202 Called when a view is added to or deleted from this document. The default
 203 implementation saves and deletes the document if no views exist (the last
 204 one has just been removed).
 205
 206 \membersection{wxDocument::OnCloseDocument}
 207
 208 \func{virtual bool}{OnCloseDocument}{\void}
 209
 210 The default implementation calls DeleteContents (an empty implementation)
 211 sets the modified flag to FALSE. Override this to
 212 supply additional behaviour when the document is closed with Close.
 213
 214 \membersection{wxDocument::OnCreate}
 215
 216 \func{virtual bool}{OnCreate}{\param{const wxString\& }{path}, \param{long}{ flags}}
 217
 218 Called just after the document object is created to give it a chance
 219 to initialize itself. The default implementation uses the
 220 template associated with the document to create an initial view.
 221 If this function returns FALSE, the document is deleted.
 222
 223 \membersection{wxDocument::OnCreateCommandProcessor}
 224
 225 \func{virtual wxCommandProcessor*}{OnCreateCommandProcessor}{\void}
 226
 227 Override this function if you want a different (or no) command processor
 228 to be created when the document is created. By default, it returns
 229 an instance of wxCommandProcessor.
 230
 231 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 232
 233 \membersection{wxDocument::OnNewDocument}
 234
 235 \func{virtual bool}{OnNewDocument}{\void}
 236
 237 The default implementation calls OnSaveModified and DeleteContents, makes a default title for the
 238 document, and notifies the views that the filename (in fact, the title) has changed.
 239
 240 \membersection{wxDocument::OnOpenDocument}
 241
 242 \func{virtual bool}{OnOpenDocument}{\param{const wxString\& }{filename}}
 243
 244 Constructs an input file stream for the given filename (which must not be NULL),
 245 and calls LoadObject. If LoadObject returns TRUE, the document is set to
 246 unmodified; otherwise, an error message box is displayed. The document's
 247 views are notified that the filename has changed, to give windows an opportunity
 248 to update their titles. All of the document's views are then updated.
 249
 250 \membersection{wxDocument::OnSaveDocument}
 251
 252 \func{virtual bool}{OnSaveDocument}{\param{const wxString\& }{filename}}
 253
 254 Constructs an output file stream for the given filename (which must not be NULL),
 255 and calls SaveObject. If SaveObject returns TRUE, the document is set to
 256 unmodified; otherwise, an error message box is displayed.
 257
 258 \membersection{wxDocument::OnSaveModified}
 259
 260 \func{virtual bool}{OnSaveModified}{\void}
 261
 262 If the document has been modified, prompts the user to ask if the changes should
 263 be changed. If the user replies Yes, the Save function is called. If No, the
 264 document is marked as unmodified and the function succeeds. If Cancel, the
 265 function fails.
 266
 267 \membersection{wxDocument::RemoveView}
 268
 269 \func{virtual bool}{RemoveView}{\param{wxView* }{view}}
 270
 271 Removes the view from the document's list of views, and calls OnChangedViewList.
 272
 273 \membersection{wxDocument::Save}
 274
 275 \func{virtual bool}{Save}{\void}
 276
 277 Saves the document by calling OnSaveDocument if there is an associated filename,
 278 or SaveAs if there is no filename.
 279
 280 \membersection{wxDocument::SaveAs}
 281
 282 \func{virtual bool}{SaveAs}{\void}
 283
 284 Prompts the user for a file to save to, and then calls OnSaveDocument.
 285
 286 \membersection{wxDocument::SaveObject}
 287
 288 \func{virtual ostream\&}{SaveObject}{\param{ostream\& }{stream}}
 289
 290 Override this function and call it from your own SaveObject before
 291 streaming your own data. SaveObject is called by the framework
 292 automatically when the document contents need to be saved.
 293
 294 \membersection{wxDocument::SetCommandProcessor}
 295
 296 \func{virtual void}{SetCommandProcessor}{\param{wxCommandProcessor *}{processor}}
 297
 298 Sets the command processor to be used for this document. The document will then be responsible
 299 for its deletion. Normally you should not call this; override OnCreateCommandProcessor
 300 instead.
 301
 302 See \helpref{wxCommandProcessor}{wxcommandprocessor}.
 303
 304 \membersection{wxDocument::SetDocumentName}
 305
 306 \func{void}{SetDocumentName}{\param{const wxString\& }{name}}
 307
 308 Sets the document type name for this document. See the comment for \helpref{documentTypeName}{documenttypename}.
 309
 310 \membersection{wxDocument::SetDocumentTemplate}
 311
 312 \func{void}{SetDocumentTemplate}{\param{wxDocTemplate* }{templ}}
 313
 314 Sets the pointer to the template that created the document. Should only be called by the
 315 framework.
 316
 317 \membersection{wxDocument::SetFilename}
 318
 319 \func{void}{SetFilename}{\param{const wxString\& }{filename}}
 320
 321 Sets the filename for this document. Usually called by the framework.
 322
 323 \membersection{wxDocument::SetTitle}
 324
 325 \func{void}{SetTitle}{\param{const wxString\& }{title}}
 326
 327 Sets the title for this document. The document title is used for an associated
 328 frame (if any), and is usually constructed by the framework from
 329 the filename.
 330
 331 \membersection{wxDocument::UpdateAllViews}\label{wxdocumentupdateallviews}
 332
 333 \func{void}{UpdateAllViews}{\param{wxView* }{sender = NULL}}
 334
 335 Updates all views. If {\it sender} is non-NULL, does not update this view.
 336