docs/latex/wx/htwindow.tex

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   2 % automatically generated by HelpGen from
   3 % htmlwindow.tex at 14/Mar/99 20:13:37
   4 %
   5
   6 \section{\class{wxHtmlWindow}}\label{wxhtmlwindow}
   7
   8 wxHtmlWindow is probably the only class you will directly use
   9 unless you want to do something special (like adding new tag
  10 handlers or MIME filters).
  11
  12 The purpose of this class is to display HTML pages (either local
  13 file or downloaded via HTTP protocol) in a window. The width
  14 of the window is constant - given in the constructor - and virtual height
  15 is changed dynamically depending on page size.
  16 Once the window is created you can set its content by calling
  17 \helpref{SetPage(text)}{wxhtmlwindowsetpage} or
  18 \helpref{LoadPage(filename)}{wxhtmlwindowloadpage}.
  19
  20 \wxheading{Note}
  21
  22 wxHtmlWindow uses the \helpref{wxImage}{wximage} class for displaying images.
  23 Don't forget to initialize all image formats you need before loading any page!
  24 (See \helpref{wxInitAllImageHandlers}{wxinitallimagehandlers} and
  25 \helpref{wxImage::AddHandler}{wximageaddhandler}.)
  26
  27 \wxheading{Derived from}
  28
  29 \helpref{wxScrolledWindow}{wxscrolledwindow}
  30
  31 \wxheading{Include files}
  32
  33 <wx/html/htmlwin.h>
  34
  35 \membersection{wxHtmlWindow::wxHtmlWindow}\label{wxhtmlwindowwxhtmlwindow}
  36
  37 \func{}{wxHtmlWindow}{\void}
  38
  39 Default constructor.
  40
  41 \func{}{wxHtmlWindow}{\param{wxWindow }{*parent}, \param{wxWindowID }{id = -1}, \param{const wxPoint\& }{pos = wxDefaultPosition}, \param{const wxSize\& }{size = wxDefaultSize}, \param{long }{style = wxHW\_SCROLLBAR\_AUTO}, \param{const wxString\& }{name = "htmlWindow"}}
  42
  43 Constructor. The parameters are the same as for the \helpref{wxScrolledWindow}{wxscrolledwindow} constructor.
  44
  45 \wxheading{Parameters}
  46
  47 \docparam{style}{wxHW\_SCROLLBAR\_NEVER,  or wxHW\_SCROLLBAR\_AUTO.
  48 Affects the appearance of vertical scrollbar in the window.}
  49
  50 \membersection{wxHtmlWindow::AddFilter}\label{wxhtmlwindowaddfilter}
  51
  52 \func{static void}{AddFilter}{\param{wxHtmlFilter }{*filter}}
  53
  54 Adds \helpref{input filter}{filters} to the static list of available
  55 filters. These filters are present by default:
  56
  57 \begin{itemize}\itemsep=0pt
  58 \item {\tt text/html} MIME type
  59 \item {\tt image/*} MIME types
  60 \item Plain Text filter (this filter is used if no other filter matches)
  61 \end{itemize}
  62
  63 \membersection{wxHtmlWindow::AppendToPage}\label{wxhtmlwindowappendtopage}
  64
  65 \func{bool}{AppendToPage}{\param{const wxString\& }{source}}
  66
  67 Appends HTML fragment to currently displayed text and refreshes the window.
  68
  69 \wxheading{Parameters}
  70
  71 \docparam{source}{HTML code fragment}
  72
  73 \wxheading{Return value}
  74
  75 FALSE if an error occurred, TRUE otherwise.
  76
  77 \membersection{wxHtmlWindow::GetInternalRepresentation}\label{wxhtmlwindowgetinternalrepresentation}
  78
  79 \constfunc{wxHtmlContainerCell*}{GetInternalRepresentation}{\void}
  80
  81 Returns pointer to the top-level container.
  82
  83 See also: \helpref{Cells Overview}{cells},
  84 \helpref{Printing Overview}{printing}
  85
  86 \membersection{wxHtmlWindow::GetOpenedAnchor}\label{wxhtmlwindowgetopenedanchor}
  87
  88 \func{wxString}{GetOpenedAnchor}{\void}
  89
  90 Returns anchor within currently opened page
  91 (see \helpref{GetOpenedPage}{wxhtmlwindowgetopenedpage}).
  92 If no page is opened or if the displayed page wasn't
  93 produced by call to LoadPage, empty string is returned.
  94
  95
  96 \membersection{wxHtmlWindow::GetOpenedPage}\label{wxhtmlwindowgetopenedpage}
  97
  98 \func{wxString}{GetOpenedPage}{\void}
  99
 100 Returns full location of the opened page. If no page is opened or if the displayed page wasn't
 101 produced by call to LoadPage, empty string is returned.
 102
 103 \membersection{wxHtmlWindow::GetOpenedPageTitle}\label{wxhtmlwindowgetopenedpagetitle}
 104
 105 \func{wxString}{GetOpenedPageTitle}{\void}
 106
 107 Returns title of the opened page or wxEmptyString if current page does not contain {\tt <TITLE>} tag.
 108
 109 \membersection{wxHtmlWindow::GetRelatedFrame}\label{wxhtmlwindowgetrelatedframe}
 110
 111 \constfunc{wxFrame*}{GetRelatedFrame}{\void}
 112
 113 Returns the related frame.
 114
 115 \membersection{wxHtmlWindow::HistoryBack}\label{wxhtmlwindowhistoryback}
 116
 117 \func{bool}{HistoryBack}{\void}
 118
 119 Moves back to the previous page. (each page displayed using
 120 \helpref{LoadPage}{wxhtmlwindowloadpage} is stored in history list.)
 121
 122 \membersection{wxHtmlWindow::HistoryCanBack}\label{wxhtmlwindowhistorycanback}
 123
 124 \func{bool}{HistoryCanBack}{\void}
 125
 126 Returns true if it is possible to go back in the history (i.e. HistoryBack()
 127 won't fail).
 128
 129 \membersection{wxHtmlWindow::HistoryCanForward}\label{wxhtmlwindowhistorycanforward}
 130
 131 \func{bool}{HistoryCanForward}{\void}
 132
 133 Returns true if it is possible to go forward in the history (i.e. HistoryBack()
 134 won't fail).
 135
 136
 137 \membersection{wxHtmlWindow::HistoryClear}\label{wxhtmlwindowhistoryclear}
 138
 139 \func{void}{HistoryClear}{\void}
 140
 141 Clears history.
 142
 143 \membersection{wxHtmlWindow::HistoryForward}\label{wxhtmlwindowhistoryforward}
 144
 145 \func{bool}{HistoryForward}{\void}
 146
 147 Moves to next page in history.
 148
 149 \membersection{wxHtmlWindow::LoadPage}\label{wxhtmlwindowloadpage}
 150
 151 \func{virtual bool}{LoadPage}{\param{const wxString\& }{location}}
 152
 153 Unlike SetPage this function first loads HTML page from {\it location}
 154 and then displays it. See example:
 155
 156 \begin{verbatim}
 157 htmlwin -> SetPage("help/myproject/index.htm");
 158 \end{verbatim}
 159
 160 \wxheading{Parameters}
 161
 162 \docparam{location}{The address of document. See \helpref{wxFileSystem}{wxfilesystem} for details on address format and behaviour of "opener".}
 163
 164 \wxheading{Return value}
 165
 166 FALSE if an error occurred, TRUE otherwise
 167
 168 \membersection{wxHtmlWindow::OnCellClicked}\label{wxhtmlwindowoncellclicked}
 169
 170 \func{virtual void}{OnCellClicked}{\param{wxHtmlCell }{*cell}, \param{wxCoord }{x}, \param{wxCoord }{y}, \param{const wxMouseEvent\& }{event}}
 171
 172 This method is called when a mouse button is clicked inside wxHtmlWindow.
 173 The default behaviour is to call
 174 \helpref{OnLinkClicked}{wxhtmlwindowonlinkclicked} if the cell contains a
 175 hypertext link.
 176
 177 \wxheading{Parameters}
 178
 179 \docparam{cell}{The cell inside which the mouse was clicked, always a simple
 180 (i.e. non container) cell}
 181
 182 \docparam{x, y}{The logical coordinates of the click point}
 183
 184 \docparam{event}{The mouse event containing other information about the click}
 185
 186 \membersection{wxHtmlWindow::OnCellMouseHover}\label{wxhtmlwindowoncellmousehover}
 187
 188 \func{virtual void}{OnCellMouseHover}{\param{wxHtmlCell }{*cell}, \param{wxCoord }{x}, \param{wxCoord }{y}}
 189
 190 This method is called when a mouse moves over an HTML cell.
 191
 192 \wxheading{Parameters}
 193
 194 \docparam{cell}{The cell inside which the mouse is currently, always a simple
 195 (i.e. non container) cell}
 196
 197 \docparam{x, y}{The logical coordinates of the click point}
 198
 199 \membersection{wxHtmlWindow::OnLinkClicked}\label{wxhtmlwindowonlinkclicked}
 200
 201 \func{virtual void}{OnLinkClicked}{\param{const wxHtmlLinkInfo\& }{link}}
 202
 203 Called when user clicks on hypertext link. Default behaviour is to call
 204 \helpref{LoadPage}{wxhtmlwindowloadpage} and do nothing else.
 205
 206 Also see \helpref{wxHtmlLinkInfo}{wxhtmllinkinfo}.
 207
 208 \membersection{wxHtmlWindow::OnOpeningURL}\label{wxhtmlwindowonopeningurl}
 209
 210 \func{virtual wxHtmlOpeningStatus}{OnOpeningURL}{\param{wxHtmlURLType }{type},\param{const wxString\& }{url}, \param{wxString *}{redirect}}
 211
 212 Called when an URL is being opened (either when the user clicks on a link or
 213 an image is loaded). The URL will be opened only if OnOpeningURL returns
 214 {\tt wxHTML\_OPEN}. This method is called by
 215 \helpref{wxHtmlParser::OpenURL}{wxhtmlparseropenurl}.
 216 You can override OnOpeningURL to selectively block some
 217 URLs (e.g. for security reasons) or to redirect them elsewhere. Default
 218 behaviour is to always return {\tt wxHTML\_OPEN}.
 219
 220 \wxheading{Parameters}
 221
 222 \docparam{type}{Indicates type of the resource. Is one of
 223 \begin{twocollist}\itemsep=0pt
 224 \twocolitem{{\bf wxHTML\_URL\_PAGE}}{Opening a HTML page.}
 225 \twocolitem{{\bf wxHTML\_URL\_IMAGE}}{Opening an image.}
 226 \twocolitem{{\bf wxHTML\_URL\_OTHER}}{Opening a resource that doesn't fall into
 227 any other category.}
 228 \end{twocollist}}
 229
 230 \docparam{url}{URL being opened.}
 231
 232 \docparam{redirect}{Pointer to wxString variable that must be filled with an
 233 URL if OnOpeningURL returns {\tt wxHTML\_REDIRECT}.}
 234
 235 \wxheading{Return value}
 236 \begin{twocollist}\itemsep=0pt
 237 \twocolitem{{\bf wxHTML\_OPEN}}{Open the URL.}
 238 \twocolitem{{\bf wxHTML\_BLOCK}}{Deny access to the URL, \helpref{wxHtmlParser::OpenURL}{wxhtmlparseropenurl} will return NULL.}
 239 \twocolitem{{\bf wxHTML\_REDIRECT}}{Don't open {\it url}, redirect to another
 240 URL. OnOpeningURL must fill {\it *redirect} with the new URL. OnOpeningURL will
 241 be called again on returned URL.}
 242 \end{twocollist}
 243
 244 \membersection{wxHtmlWindow::OnSetTitle}\label{wxhtmlwindowonsettitle}
 245
 246 \func{virtual void}{OnSetTitle}{\param{const wxString\& }{title}}
 247
 248 Called on parsing {\tt <TITLE>} tag.
 249
 250
 251 \membersection{wxHtmlWindow::ReadCustomization}\label{wxhtmlwindowreadcustomization}
 252
 253 \func{virtual void}{ReadCustomization}{\param{wxConfigBase }{*cfg}, \param{wxString }{path = wxEmptyString}}
 254
 255 This reads custom settings from wxConfig. It uses the path 'path'
 256 if given, otherwise it saves info into currently selected path.
 257 The values are stored in sub-path {\tt wxHtmlWindow}
 258
 259 Read values: all things set by SetFonts, SetBorders.
 260
 261 \wxheading{Parameters}
 262
 263 \docparam{cfg}{wxConfig from which you want to read the configuration.}
 264
 265 \docparam{path}{Optional path in config tree. If not given current path is used.}
 266
 267 \membersection{wxHtmlWindow::SetBorders}\label{wxhtmlwindowsetborders}
 268
 269 \func{void}{SetBorders}{\param{int }{b}}
 270
 271 This function sets the space between border of window and HTML contents. See image:
 272
 273 \helponly{\image{}{border.bmp}}
 274
 275 \wxheading{Parameters}
 276
 277 \docparam{b}{indentation from borders in pixels}
 278
 279 \membersection{wxHtmlWindow::SetFonts}\label{wxhtmlwindowsetfonts}
 280
 281 \func{void}{SetFonts}{\param{wxString }{normal\_face}, \param{wxString }{fixed\_face}, \param{const int }{*sizes}}
 282
 283 This function sets font sizes and faces.
 284
 285 \wxheading{Parameters}
 286
 287 \docparam{normal\_face}{This is face name for normal (i.e. non-fixed) font.
 288 It can be either empty string (then the default face is choosen) or
 289 platform-specific face name. Examples are "helvetica" under Unix or
 290 "Times New Roman" under Windows.}
 291
 292 \docparam{fixed\_face}{The same thing for fixed face ( <TT>..</TT> )}
 293
 294 \docparam{sizes}{This is an array of 7 items of {\it int} type.
 295 The values represent size of font with HTML size from -2 to +4
 296 ( <FONT SIZE=-2> to <FONT SIZE=+4> )}
 297
 298 \wxheading{Defaults}
 299
 300 Under wxGTK:
 301
 302 \begin{verbatim}
 303     SetFonts("", "", {10, 12, 14, 16, 19, 24, 32});
 304 \end{verbatim}
 305
 306 Under Windows:
 307
 308 \begin{verbatim}
 309     SetFonts("", "", {7, 8, 10, 12, 16, 22, 30});
 310 \end{verbatim}
 311
 312 Athough it seems different the fact is that the fonts are of approximately
 313 same size under both platforms (due to wxMSW / wxGTK inconsistency)
 314
 315 \membersection{wxHtmlWindow::SetPage}\label{wxhtmlwindowsetpage}
 316
 317 \func{bool}{SetPage}{\param{const wxString\& }{source}}
 318
 319 Sets HTML page and display it. This won't {\bf load} the page!!
 320 It will display the {\it source}. See example:
 321
 322 \begin{verbatim}
 323 htmlwin -> SetPage("<html><body>Hello, world!</body></html>");
 324 \end{verbatim}
 325
 326 If you want to load a document from some location use
 327 \helpref{LoadPage}{wxhtmlwindowloadpage} instead.
 328
 329 \wxheading{Parameters}
 330
 331 \docparam{source}{The HTML document source to be displayed.}
 332
 333 \wxheading{Return value}
 334
 335 FALSE if an error occurred, TRUE otherwise.
 336
 337 \membersection{wxHtmlWindow::SetRelatedFrame}\label{wxhtmlwindowsetrelatedframe}
 338
 339 \func{void}{SetRelatedFrame}{\param{wxFrame* }{frame}, \param{const wxString\& }{format}}
 340
 341 Sets the frame in which page title will be displayed. {\it format} is format of
 342 frame title, e.g. "HtmlHelp : \%s". It must contain exactly one \%s. This
 343 \%s is substituted with HTML page title.
 344
 345 \membersection{wxHtmlWindow::SetRelatedStatusBar}\label{wxhtmlwindowsetrelatedstatusbar}
 346
 347 \func{void}{SetRelatedStatusBar}{\param{int }{bar}}
 348
 349 {\bf After} calling \helpref{SetRelatedFrame}{wxhtmlwindowsetrelatedframe},
 350 this sets statusbar slot where messages will be displayed.
 351 (Default is -1 = no messages.)
 352
 353 \wxheading{Parameters}
 354
 355 \docparam{bar}{statusbar slot number (0..n)}
 356
 357
 358 \membersection{wxHtmlWindow::WriteCustomization}\label{wxhtmlwindowwritecustomization}
 359
 360 \func{virtual void}{WriteCustomization}{\param{wxConfigBase }{*cfg}, \param{wxString }{path = wxEmptyString}}
 361
 362 Saves custom settings into wxConfig. It uses the path 'path'
 363 if given, otherwise it saves info into currently selected path.
 364 Regardless of whether the path is given or not, the function creates sub-path
 365 {\tt wxHtmlWindow}.
 366
 367 Saved values: all things set by SetFonts, SetBorders.
 368
 369 \wxheading{Parameters}
 370
 371 \docparam{cfg}{wxConfig to which you want to save the configuration.}
 372
 373 \docparam{path}{Optional path in config tree. If not given, the current path is used.}
 374