handlers added using AddHandler() last must have the highest priority (patch 1522807)

[wxWidgets.git] / docs / latex / wx / helpinst.tex

diff --git a/docs/latex/wx/helpinst.tex b/docs/latex/wx/helpinst.tex
index 8d8bdff00d71ccec43f0f20a3f68c378c9897b16..01ef4f3eb1df50bb28037e902a653274ba56f011 100644 (file)
--- a/docs/latex/wx/helpinst.tex
+++ b/docs/latex/wx/helpinst.tex
@@ -13,18 +13,42 @@ when it starts, and immediately call {\bf Initialize}\rtfsp
 to associate a filename with it. The help viewer will only get run, however,
 just before the first call to display something.
 
 to associate a filename with it. The help viewer will only get run, however,
 just before the first call to display something.
 

-Although all help controller classes actually derive from wxHelpControllerBase and have
-names of the form wxXXXHelpController, the
-appropriate class is aliased to the name wxHelpController for each platform.
+Most help controller classes actually derive from wxHelpControllerBase and have
+names of the form wxXXXHelpController or wxHelpControllerXXX. An
+appropriate class is aliased to the name wxHelpController for each platform, as follows:
+
+\begin{itemize}\itemsep=0pt
+\item On desktop Windows, wxCHMHelpController is used (MS HTML Help).
+\item On Windows CE, wxWinceHelpController is used.
+\item On all other platforms, wxHtmlHelpController is used if wxHTML is
+compiled into wxWidgets; otherwise wxExtHelpController is used (for invoking an external
+browser).
+\end{itemize}
+
+The remaining help controller classes need to be named
+explicitly by an application that wishes to make use of them.

 
 There are currently the following help controller classes defined:
 
 \begin{itemize}\itemsep=0pt
 \item wxWinHelpController, for controlling Windows Help.
 
 There are currently the following help controller classes defined:
 
 \begin{itemize}\itemsep=0pt
 \item wxWinHelpController, for controlling Windows Help.

+\item wxCHMHelpController, for controlling MS HTML Help. To use this, you need to set wxUSE\_MS\_HTML\_HELP
+to 1 in setup.h and have htmlhelp.h header from Microsoft's HTML Help kit (you don't need
+VC++ specific htmlhelp.lib because wxWidgets loads necessary DLL at runtime and so it
+works with all compilers).
+\item wxBestHelpController, for controlling MS HTML Help or, if Microsoft's runtime is
+not available, \helpref{wxHtmlHelpController}{wxhtmlhelpcontroller}. You need to provide
+{\bf both} CHM and HTB versions of the help file. For 32bit Windows only.

 \item wxExtHelpController, for controlling external browsers under Unix.
 \item wxExtHelpController, for controlling external browsers under Unix.

-The default browser is Netscape Navigator.
-\item wxHelpControllerHtml, using wxHTML to display help
-\item wxXLPHelpController, for controlling wxHelp (from wxWindows 1).
+The default browser is Netscape Navigator. The 'help' sample shows its use.
+\item wxWinceHelpController, for controlling a simple {\tt .htm} help controller for Windows CE applications.
+\item \helpref{wxHtmlHelpController}{wxhtmlhelpcontroller}, a sophisticated help controller using \helpref{wxHTML}{wxhtml}, in
+a similar style to the Microsoft HTML Help viewer and using some of the same files.
+Although it has an API compatible with other help controllers, it has more advanced features, so it is
+recommended that you use the specific API for this class instead. Note that if you
+use .zip or .htb formats for your books, you
+must add this line to your application initialization: {\tt wxFileSystem::AddHandler(new wxZipFSHandler);}
+or nothing will be shown in your help window.

 \end{itemize}
 
 \wxheading{Derived from}
 \end{itemize}
 
 \wxheading{Derived from}


@@ -34,22 +58,31 @@ wxHelpControllerBase\\
 
 \wxheading{Include files}
 
 
 \wxheading{Include files}
 

-<wx/help.h> (wxWindows chooses the appropriate help controller class)\\
+<wx/help.h> (wxWidgets chooses the appropriate help controller class)\\

 <wx/helpbase.h> (wxHelpControllerBase class)\\
 <wx/helpwin.h> (Windows Help controller)\\
 <wx/helpbase.h> (wxHelpControllerBase class)\\
 <wx/helpwin.h> (Windows Help controller)\\

-<wx/generic/helpext.h> (external HTML browser controller)
-<wx/generic/helpwxht.h> (wxHTML based help controller)
-<wx/generic/helpxlp.h> (wxHelp controller)
+<wx/msw/helpchm.h> (MS HTML Help controller)\\
+<wx/generic/helpext.h> (external HTML browser controller)\\
+<wx/html/helpctrl.h> (wxHTML based help controller: wxHtmlHelpController)
+
+\wxheading{See also}
+
+\helpref{wxHtmlHelpController}{wxhtmlhelpcontroller}, \helpref{wxHTML}{wxhtml}

 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 

-\membersection{wxHelpController::wxHelpController}
+\membersection{wxHelpController::wxHelpController}\label{wxhelpcontrollerctor}

 
 

-\func{}{wxHelpController}{\void}
+\func{}{wxHelpController}{\param{wxWindow*}{ parentWindow = NULL}}

 
 Constructs a help instance object, but does not invoke the help viewer.
 
 
 Constructs a help instance object, but does not invoke the help viewer.
 

-\membersection{wxHelpController::\destruct{wxHelpController}}
+If you provide a window, it will be used by some help controller classes, such as
+wxCHMHelpController, wxWinHelpController and wxHtmlHelpController, as the
+parent for the help window instead of the value of \helpref{wxApp::GetTopWindow}{wxappgettopwindow}. You can also change the parent window later with 
+\helpref{wxHelpController::SetParentWindow}{wxhelpcontrollersetparentwindow}.
+
+\membersection{wxHelpController::\destruct{wxHelpController}}\label{wxhelpcontrollerdtor}

 
 \func{}{\destruct{wxHelpController}}{\void}
 
 
 \func{}{\destruct{wxHelpController}}{\void}
 


@@ -57,16 +90,18 @@ Destroys the help instance, closing down the viewer if it is running.
 
 \membersection{wxHelpController::Initialize}\label{wxhelpcontrollerinitialize}
 
 
 \membersection{wxHelpController::Initialize}\label{wxhelpcontrollerinitialize}
 

-\func{virtual void}{Initialize}{\param{const wxString\& }{file}}
+\func{virtual bool}{Initialize}{\param{const wxString\& }{file}}

 
 

-\func{virtual void}{Initialize}{\param{const wxString\& }{file}, \param{int}{ server}}
+\func{virtual bool}{Initialize}{\param{const wxString\& }{file}, \param{int}{ server}}

 
 

-Initializes the help instance with a help filename, and optionally a server (socket)
-number if using wxHelp. Does not invoke the help viewer.
+Initializes the help instance with a help filename, and optionally a server socket
+number if using wxHelp (now obsolete). Does not invoke the help viewer.

 This must be called directly after the help instance object is created and before
 any attempts to communicate with the viewer.
 
 This must be called directly after the help instance object is created and before
 any attempts to communicate with the viewer.
 

-You may omit the file extension and a suitable one will be chosen.
+You may omit the file extension and a suitable one will be chosen. For
+wxHtmlHelpController, the extensions zip, htb and hhp will be appended while searching for
+a suitable file. For WinHelp, the hlp extension is appended.

 
 \membersection{wxHelpController::DisplayBlock}\label{wxhelpcontrollerdisplayblock}
 
 
 \membersection{wxHelpController::DisplayBlock}\label{wxhelpcontrollerdisplayblock}
 


@@ -74,12 +109,16 @@ You may omit the file extension and a suitable one will be chosen.
 
 If the help viewer is not running, runs it and displays the file at the given block number.
 
 
 If the help viewer is not running, runs it and displays the file at the given block number.
 

-{\it wxHelp:} this is the wxHelp block number.
-

 {\it WinHelp:} Refers to the context number.
 
 {\it WinHelp:} Refers to the context number.
 

+{\it MS HTML Help:} Refers to the context number.
+

 {\it External HTML help:} the same as for \helpref{wxHelpController::DisplaySection}{wxhelpcontrollerdisplaysection}.
 
 {\it External HTML help:} the same as for \helpref{wxHelpController::DisplaySection}{wxhelpcontrollerdisplaysection}.
 

+{\it wxHtmlHelpController:} {\it sectionNo} is an identifier as specified in the {\tt .hhc} file. See \helpref{Help files format}{helpformat}.
+
+This function is for backward compatibility only, and applications should use \helpref{wxHelpController}{wxhelpcontrollerdisplaysection} instead.
+

 \membersection{wxHelpController::DisplayContents}\label{wxhelpcontrollerdisplaycontents}
 
 \func{virtual bool}{DisplayContents}{\void}
 \membersection{wxHelpController::DisplayContents}\label{wxhelpcontrollerdisplaycontents}
 
 \func{virtual bool}{DisplayContents}{\void}


@@ -87,17 +126,33 @@ If the help viewer is not running, runs it and displays the file at the given bl
 If the help viewer is not running, runs it and displays the
 contents.
 
 If the help viewer is not running, runs it and displays the
 contents.
 

+\membersection{wxHelpController::DisplayContextPopup}\label{wxhelpcontrollerdisplaycontextpopup}
+
+\func{virtual bool}{DisplayContextPopup}{\param{int }{contextId}}
+
+Displays the section as a popup window using a context id.
+
+Returns false if unsuccessful or not implemented.
+

 \membersection{wxHelpController::DisplaySection}\label{wxhelpcontrollerdisplaysection}
 
 \membersection{wxHelpController::DisplaySection}\label{wxhelpcontrollerdisplaysection}
 

-\func{virtual bool}{DisplaySection}{\param{int}{ sectionNo}}
+\func{virtual bool}{DisplaySection}{\param{const wxString\&}{ section}}

 
 If the help viewer is not running, runs it and displays the given section.
 
 
 If the help viewer is not running, runs it and displays the given section.
 

-{\it wxHelp:} Sections are numbered starting from 1. Section numbers may be viewed by running wxHelp in edit mode.
+The interpretation of {\it section} differs between help viewers. For most viewers,
+this call is equivalent to KeywordSearch. For MS HTML Help, wxHTML help and external HTML help,
+if {\it section} has a .htm
+or .html extension, that HTML file will be displayed; otherwise
+a keyword search is done.
+
+\func{virtual bool}{DisplaySection}{\param{int}{ sectionNo}}
+
+If the help viewer is not running, runs it and displays the given section.

 
 

-{\it WinHelp:} {\it sectionNo} is a context id.
+{\it WinHelp, MS HTML Help} {\it sectionNo} is a context id.

 
 

-{\it External HTML help/wxHTML based help:} wxExtHelpController and wxHelpControllerHtml implement {\it sectionNo} as an id in a map file, which is of the form:
+{\it External HTML help:} wxExtHelpController implements {\it sectionNo} as an id in a map file, which is of the form:

 
 \begin{verbatim}
 0  wx.html             ; Index
 
 \begin{verbatim}
 0  wx.html             ; Index


@@ -105,78 +160,113 @@ If the help viewer is not running, runs it and displays the given section.
 2  wx204.html          ; Function reference
 \end{verbatim}
 
 2  wx204.html          ; Function reference
 \end{verbatim}
 

-\membersection{wxHelpController::KeywordSearch}\label{wxhelpcontrollerkeywordsearch}
+{\it wxHtmlHelpController:} {\it sectionNo} is an identifier as specified in the {\tt .hhc} file. See \helpref{Help files format}{helpformat}.
+
+See also the help sample for notes on how to specify section numbers for various help file formats.
+
+\membersection{wxHelpController::DisplayTextPopup}\label{wxhelpcontrollerdisplaytextpopup}
+
+\func{virtual bool}{DisplayTextPopup}{\param{const wxString\&}{ text}, \param{const wxPoint\& }{pos}}
+
+Displays the text in a popup window, if possible.
+
+Returns false if unsuccessful or not implemented.
+
+\membersection{wxHelpController::GetFrameParameters}\label{wxhelpcontrollergetframeparameters}
+
+\func{virtual wxFrame *}{GetFrameParameters}{\param{const wxSize * }{size = NULL}, \param{const wxPoint * }{pos = NULL},
+ \param{bool *}{newFrameEachTime = NULL}}
+
+wxHtmlHelpController returns the frame, size and position.
+
+For all other help controllers, this function does nothing
+and just returns NULL.
+
+\wxheading{Parameters}
+
+\docparam{viewer}{This defaults to "netscape" for wxExtHelpController.}

 
 

-\func{virtual bool}{KeywordSearch}{\param{const wxString\& }{keyWord}}
+\docparam{flags}{This defaults to wxHELP\_NETSCAPE for wxExtHelpController, indicating
+that the viewer is a variant of Netscape Navigator.}

 
 

-If the help viewer is not running, runs it, and searches for sections matching the given keyword. If one
-match is found, the file is displayed at this section.
+\membersection{wxHelpController::GetParentWindow}\label{wxhelpcontrollergetparentwindow}

 
 

-{\it wxHelp:} If more than one
-match is found, the Search dialog is displayed with the matches.
+\constfunc{virtual bool}{GetParentWindow}{\void}

 
 

-{\it WinHelp:} If more than one match is found, 
+Returns the window to be used as the parent for the help window. This window is used
+by wxCHMHelpController, wxWinHelpController and wxHtmlHelpController.
+
+\membersection{wxHelpController::KeywordSearch}\label{wxhelpcontrollerkeywordsearch}
+
+\func{virtual bool}{KeywordSearch}{\param{const wxString\& }{keyWord}, \param{wxHelpSearchMode }{mode = wxHELP\_SEARCH\_ALL}}
+
+If the help viewer is not running, runs it, and searches for sections matching
+the given keyword. If one match is found, the file is displayed at this
+section. The optional parameter allows the search the index
+(wxHELP\_SEARCH\_INDEX) but this currently only supported by the
+wxHtmlHelpController.
+
+{\it WinHelp, MS HTML Help:} If more than one match is found, 

 the first topic is displayed.
 
 the first topic is displayed.
 

-{\it External HTML help:} If more than one match is found, 
+{\it External HTML help, simple wxHTML help:} If more than one match is found, 

 a choice of topics is displayed.
 
 a choice of topics is displayed.
 

+{\it wxHtmlHelpController:} see \helpref{wxHtmlHelpController::KeywordSearch}{wxhtmlhelpcontrollerkeywordsearch}.
+

 \membersection{wxHelpController::LoadFile}\label{wxhelpcontrollerloadfile}
 
 \func{virtual bool}{LoadFile}{\param{const wxString\& }{file = ""}}
 
 If the help viewer is not running, runs it and loads the given file.
 If the filename is not supplied or is
 \membersection{wxHelpController::LoadFile}\label{wxhelpcontrollerloadfile}
 
 \func{virtual bool}{LoadFile}{\param{const wxString\& }{file = ""}}
 
 If the help viewer is not running, runs it and loads the given file.
 If the filename is not supplied or is

-NULL, the file specified in {\bf Initialize} is used. If the viewer is
+empty, the file specified in {\bf Initialize} is used. If the viewer is

 already displaying the specified file, it will not be reloaded. This
 member function may be used before each display call in case the user
 has opened another file.
 
 already displaying the specified file, it will not be reloaded. This
 member function may be used before each display call in case the user
 has opened another file.
 

-\membersection{wxHelpController::SetViewer}\label{wxhelpcontrollersetviewer}
+wxHtmlHelpController ignores this call.

 
 

-\func{virtual void}{SetViewer}{\param{const wxString\& }{viewer}, \param{long}{ flags}}
+\membersection{wxHelpController::OnQuit}\label{wxhelpcontrolleronquit}

 
 

-Sets detailed viewer information. So far this is only relevant to wxExtHelpController.
+\func{virtual bool}{OnQuit}{\void}
+
+Overridable member called when this application's viewer is quit by the user.
+
+This does not work for all help controllers.

 
 \membersection{wxHelpController::SetFrameParameters}\label{wxhelpcontrollersetframeparameters}
 
 \membersection{wxHelpController::SetFrameParameters}\label{wxhelpcontrollersetframeparameters}

-\func{virtual void}{SetFrameParameters}
-{\param{const wxString \& }{title},
+
+\func{virtual void}{SetFrameParameters}{\param{const wxString \& }{title},

  \param{const wxSize \& }{size}, \param{const wxPoint \& }{pos = wxDefaultPosition},
  \param{const wxSize \& }{size}, \param{const wxPoint \& }{pos = wxDefaultPosition},

- \param{bool }{newFrameEachTime = FALSE}}
+ \param{bool }{newFrameEachTime = false}}

 
 

-For the wxHelpControllerHtml, this allows the application to set the
-default frame title, size and position for the frame. If the title
-contains \%s, this will be replaced with the page title. If the
-parammeter newFrameEachTime is set, the controller will open a new
-help frame each time it is called. For all other help controllers this 
-function has no effect.
+For wxHtmlHelpController, the title is set (again with \%s indicating the
+page title) and also the size and position of the frame if the frame is already
+open. {\it newFrameEachTime} is ignored.

 
 

-\membersection{wxHelpController::GetFrameParameters}\label{wxhelpcontrollergetframeparameters}
-\func{virtual wxFrame *}{GetFrameParameters}
-{\param{const wxSize * }{size = NULL}, \param{const wxPoint * }{pos = NULL},
- \param{bool *}{newFrameEachTime = NULL}}
-This reads the current settings for the help frame in the case of the
-wxHelpControllerHtml, setting the frame size, position and
-the newFrameEachTime parameters to the last values used. It also
-returns the pointer to the last opened help frame. This can be used
-for example, to automatically close the help frame on program
-shutdown. For all other help controllers, this function does nothing
-and just returns NULL.
+For all other help controllers this function has no effect.

 
 

-\wxheading{Parameters}
+\membersection{wxHelpController::SetParentWindow}\label{wxhelpcontrollersetparentwindow}

 
 

-\docparam{viewer}{This defaults to "netscape" for wxExtHelpController.}
+\func{virtual void}{SetParentWindow}{\param{wxWindow* }{parentWindow}}

 
 

-\docparam{flags}{This defaults to wxHELP\_NETSCAPE for wxExtHelpController, indicating
-that the viewer is a variant of Netscape Navigator.}
+Sets the window to be used as the parent for the help window. This is used
+by wxCHMHelpController, wxWinHelpController and wxHtmlHelpController.

 
 

-\membersection{wxHelpController::OnQuit}\label{wxhelpcontrolleronquit}
+\membersection{wxHelpController::SetViewer}\label{wxhelpcontrollersetviewer}

 
 

-\func{virtual bool}{OnQuit}{\void}
+\func{virtual void}{SetViewer}{\param{const wxString\& }{viewer}, \param{long}{ flags}}

 
 

-Overridable member called when this application's viewer is quit by the user.
+Sets detailed viewer information. So far this is only relevant to wxExtHelpController.

 
 

-This does not work for all help controllers.
+Some examples of usage:
+
+\begin{verbatim}
+  m_help.SetViewer("kdehelp");
+  m_help.SetViewer("gnome-help-browser");
+  m_help.SetViewer("netscape", wxHELP_NETSCAPE);
+\end{verbatim}

 
 \membersection{wxHelpController::Quit}\label{wxhelpcontrollerquit}
 
 
 \membersection{wxHelpController::Quit}\label{wxhelpcontrollerquit}