320 lines
13 KiB
Objective-C
320 lines
13 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: help.h
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// Purpose: interface of wxHelpController
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#define wxHELP_NETSCAPE 1
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/**
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Help search modes for wxHelpController::KeywordSearch().
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*/
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enum wxHelpSearchMode
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{
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wxHELP_SEARCH_INDEX, ///< Search the index only.
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wxHELP_SEARCH_ALL ///< Search all entries.
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};
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/**
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@class wxHelpControllerBase
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This is the abstract base class a family of classes by which applications
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may invoke a help viewer to provide on-line help.
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A help controller allows an application to display help, at the contents
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or at a particular topic, and shut the help program down on termination.
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This avoids proliferation of many instances of the help viewer whenever the
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user requests a different topic via the application's menus or buttons.
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Typically, an application will create a help controller instance when it starts,
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and immediately call wxHelpController::Initialize to associate a filename with it.
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The help viewer will only get run, however, just before the first call to
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display something.
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@library{wxcore}
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@category{help}
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@see wxHelpController, wxHtmlHelpController, @ref overview_html
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*/
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class wxHelpControllerBase : public wxObject
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{
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public:
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/**
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Constructs a help instance object, but does not invoke the help viewer.
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If you provide a window, it will be used by some help controller classes, such as
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wxCHMHelpController, wxWinHelpController and wxHtmlHelpController, as the
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parent for the help window instead of the value of wxApp::GetTopWindow.
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You can also change the parent window later with SetParentWindow().
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*/
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wxHelpControllerBase(wxWindow* parentWindow = NULL);
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/**
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Destroys the help instance, closing down the viewer if it is running.
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*/
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~wxHelpControllerBase();
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/**
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If the help viewer is not running, runs it and displays the file at the given
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block number.
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- @e WinHelp: Refers to the context number.
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- @e MS HTML Help: Refers to the context number.
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- @e External HTML help: the same as for DisplaySection().
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- @e wxHtmlHelpController: @e sectionNo is an identifier as specified in
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the @c .hhc file. See @ref overview_html_helpformats.
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@deprecated
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This function is for backward compatibility only, and applications
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should use DisplaySection() instead.
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*/
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virtual bool DisplayBlock(long blockNo) = 0;
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/**
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If the help viewer is not running, runs it and displays the contents.
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*/
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virtual bool DisplayContents() = 0;
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/**
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Displays the section as a popup window using a context id.
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Returns @false if unsuccessful or not implemented.
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*/
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virtual bool DisplayContextPopup(int contextId);
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/**
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If the help viewer is not running, runs it and displays the given section.
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The interpretation of section differs between help viewers.
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For most viewers, this call is equivalent to KeywordSearch.
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For MS HTML Help, wxHTML help and external HTML help, if section has a
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.htm or .html extension, that HTML file will be displayed; otherwise a
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keyword search is done.
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*/
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virtual bool DisplaySection(const wxString& section);
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/**
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If the help viewer is not running, runs it and displays the given section.
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- @e WinHelp, MS HTML Help @a sectionNo is a context id.
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- @e External HTML help: wxExtHelpController implements @a sectionNo as
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an id in a map file, which is of the form:
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- @e wxHtmlHelpController: @a sectionNo is an identifier as specified in
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the @c .hhc file. See @ref overview_html_helpformats.
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See also the help sample for notes on how to specify section numbers for
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various help file formats.
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*/
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virtual bool DisplaySection(int sectionNo) = 0;
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/**
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Displays the text in a popup window, if possible.
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Returns @false if unsuccessful or not implemented.
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*/
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virtual bool DisplayTextPopup(const wxString& text,
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const wxPoint& pos);
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/**
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For wxHtmlHelpController, returns the latest frame size and position
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settings and whether a new frame is drawn with each invocation.
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For all other help controllers, this function does nothing and just returns @NULL.
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@param size
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The most recent frame size.
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@param pos
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The most recent frame position.
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@param newFrameEachTime
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@true if a new frame is drawn with each invocation.
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*/
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virtual wxFrame* GetFrameParameters(wxSize* size = NULL,
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wxPoint* pos = NULL,
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bool* newFrameEachTime = NULL);
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/**
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Returns the window to be used as the parent for the help window.
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This window is used by wxCHMHelpController, wxWinHelpController and
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wxHtmlHelpController.
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*/
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virtual wxWindow* GetParentWindow() const;
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//@{
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/**
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Initializes the help instance with a help filename, and optionally a server
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socket number if using wxHelp (now obsolete). Does not invoke the help viewer.
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This must be called directly after the help instance object is created and
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before any attempts to communicate with the viewer.
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You may omit the file extension and a suitable one will be chosen.
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For wxHtmlHelpController, the extensions zip, htb and hhp will be appended
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while searching for a suitable file. For WinHelp, the hlp extension is appended.
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*/
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virtual bool Initialize(const wxString& file);
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virtual bool Initialize(const wxString& file, int server);
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//@}
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/**
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If the help viewer is not running, runs it, and searches for sections matching
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the given keyword. If one match is found, the file is displayed at this section.
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The optional parameter allows searching the index (wxHELP_SEARCH_INDEX)
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but this currently is only supported by the wxHtmlHelpController.
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- @e WinHelp, MS HTML Help:
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If more than one match is found, the first topic is displayed.
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- @e External HTML help, simple wxHTML help:
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If more than one match is found, a choice of topics is displayed.
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- @e wxHtmlHelpController: see wxHtmlHelpController::KeywordSearch.
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*/
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virtual bool KeywordSearch(const wxString& keyWord,
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wxHelpSearchMode mode = wxHELP_SEARCH_ALL) = 0;
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/**
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If the help viewer is not running, runs it and loads the given file.
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If the filename is not supplied or is empty, the file specified in
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Initialize() is used.
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If the viewer is already displaying the specified file, it will not be
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reloaded. This member function may be used before each display call in
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case the user has opened another file.
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wxHtmlHelpController ignores this call.
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*/
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virtual bool LoadFile(const wxString& file = wxEmptyString) = 0;
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/**
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Overridable member called when this application's viewer is quit by the user.
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This does not work for all help controllers.
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*/
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virtual void OnQuit();
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/**
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If the viewer is running, quits it by disconnecting.
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For Windows Help, the viewer will only close if no other application is using it.
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*/
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virtual bool Quit() = 0;
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/**
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Set the parameters of the frame window.
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For wxHtmlHelpController, @a titleFormat specifies the title string
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format (with @c %s being replaced by the actual page title) and @a size
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and @a position specify the geometry of the frame.
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For all other help controllers this function has no effect.
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Finally, @a newFrameEachTime is always ignored currently.
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*/
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virtual void SetFrameParameters(const wxString& titleFormat,
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const wxSize& size,
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const wxPoint& pos = wxDefaultPosition,
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bool newFrameEachTime = false);
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/**
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Sets the window to be used as the parent for the help window. This is used
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by wxCHMHelpController, wxWinHelpController and wxHtmlHelpController.
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*/
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virtual void SetParentWindow(wxWindow* parentWindow);
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/**
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Sets detailed viewer information.
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So far this is only relevant to wxExtHelpController.
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Some examples of usage:
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@code
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m_help.SetViewer("kdehelp");
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m_help.SetViewer("gnome-help-browser");
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m_help.SetViewer("netscape", wxHELP_NETSCAPE);
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@endcode
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@param viewer
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This defaults to "netscape" for wxExtHelpController.
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@param flags
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This defaults to wxHELP_NETSCAPE for wxExtHelpController, indicating
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that the viewer is a variant of Netscape Navigator.
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@todo modernize this function with ::wxLaunchDefaultBrowser
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*/
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virtual void SetViewer(const wxString& viewer, long flags=wxHELP_NETSCAPE);
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};
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/**
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@class wxHelpController
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This is an alias for one of a family of help controller classes which is
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most appropriate for the current platform.
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A help controller allows an application to display help, at the contents
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or at a particular topic, and shut the help program down on termination.
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This avoids proliferation of many instances of the help viewer whenever the
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user requests a different topic via the application's menus or buttons.
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Typically, an application will create a help controller instance when it starts,
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and immediately call wxHelpController::Initialize to associate a filename with it.
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The help viewer will only get run, however, just before the first call to
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display something.
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Most help controller classes actually derive from wxHelpControllerBase and have
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names of the form wxXXXHelpController or wxHelpControllerXXX.
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An appropriate class is aliased to the name wxHelpController for each platform, as
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follows:
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- On desktop Windows, wxCHMHelpController is used (MS HTML Help).
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- On Windows CE, wxWinceHelpController is used.
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- On all other platforms, wxHtmlHelpController is used if wxHTML is compiled
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into wxWidgets; otherwise wxExtHelpController is used (for invoking an
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external browser).
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The remaining help controller classes need to be named explicitly by an
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application that wishes to make use of them.
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The following help controller classes are defined:
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- wxWinHelpController, for controlling Windows Help.
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- wxCHMHelpController, for controlling MS HTML Help. To use this, you need to
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set wxUSE_MS_HTML_HELP to 1 in setup.h and have the htmlhelp.h header from
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Microsoft's HTML Help kit. (You don't need the VC++-specific htmlhelp.lib
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because wxWidgets loads necessary DLL at runtime and so it works with all
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compilers.)
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- wxBestHelpController, for controlling MS HTML Help or, if Microsoft's runtime
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is not available, wxHtmlHelpController. You need to provide @b both CHM and
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HTB versions of the help file. For wxMSW only.
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- wxExtHelpController, for controlling external browsers under Unix.
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The default browser is Netscape Navigator. The 'help' sample shows its use.
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- wxWinceHelpController, for controlling a simple @c .htm help controller for
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Windows CE applications.
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- wxHtmlHelpController, a sophisticated help controller using wxHTML, in a
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similar style to the Microsoft HTML Help viewer and using some of the same
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files. Although it has an API compatible with other help controllers, it has
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more advanced features, so it is recommended that you use the specific API
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for this class instead. Note that if you use .zip or .htb formats for your
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books, you must add this line to your application initialization:
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@code wxFileSystem::AddHandler(new wxArchiveFSHandler); @endcode
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or nothing will be shown in your help window.
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@library{wxcore}
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@category{help}
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@see wxHtmlHelpController, @ref overview_html
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*/
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class wxHelpController : public wxHelpControllerBase
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{
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public:
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/**
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Constructs a help instance object, but does not invoke the help viewer.
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If you provide a window, it will be used by some help controller classes, such as
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wxCHMHelpController, wxWinHelpController and wxHtmlHelpController, as the
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parent for the help window instead of the value of wxApp::GetTopWindow.
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You can also change the parent window later with SetParentWindow().
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*/
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wxHelpController(wxWindow* parentWindow = NULL);
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};
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