include/wx/generic/helpext.h

   1 /*-*- c++ -*-********************************************************
   2  * helpext.h - an external help controller for wxWidgets             *
   3  *                                                                  *
   4  * (C) 1998 by Karsten Ballüder (Ballueder@usa.net)                 *
   5  *                                                                  *
   6  * $Id$
   7  *******************************************************************/
   8
   9 #ifndef __WX_HELPEXT_H_
  10 #define __WX_HELPEXT_H_
  11
  12 #if wxUSE_HELP
  13
  14 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  15 #   pragma interface "wxexthlp.h"
  16 #endif
  17
  18 #include "wx/helpbase.h"
  19
  20 /// Path separator.
  21 #ifdef __WXMSW__
  22 #define WXEXTHELP_SEPARATOR _T('\\')
  23 #elif defined(__WXMAC__)
  24 #define WXEXTHELP_SEPARATOR _T(':')
  25 #else
  26 #define WXEXTHELP_SEPARATOR _T('/')
  27 #endif
  28
  29 class WXDLLIMPEXP_ADV wxExtHelpMapList;
  30
  31 #ifndef WXEXTHELP_DEFAULTBROWSER
  32 /// Default browser name.
  33 #   define WXEXTHELP_DEFAULTBROWSER _T("netscape")
  34 /// Is default browse a variant of netscape?
  35 #   define WXEXTHELP_DEFAULTBROWSER_IS_NETSCAPE true
  36 #endif
  37
  38 /**
  39    This class implements help via an external browser.
  40    It requires the name of a directory containing the documentation
  41    and a file mapping numerical Section numbers to relative URLS.
  42
  43    The map file contains two or three fields per line:
  44    numeric_id  relative_URL  [; comment/documentation]
  45
  46    The numeric_id is the id used to look up the entry in
  47    DisplaySection()/DisplayBlock(). The relative_URL is a filename of
  48    an html file, relative to the help directory. The optional
  49    comment/documentation field (after a ';') is used for keyword
  50    searches, so some meaningful text here does not hurt.
  51    If the documentation itself contains a ';', only the part before
  52    that will be displayed in the listbox, but all of it used for search.
  53
  54    Lines starting with ';' will be ignored.
  55 */
  56
  57 class WXDLLIMPEXP_ADV wxExtHelpController : public wxHelpControllerBase
  58 {
  59 DECLARE_CLASS(wxExtHelpController)
  60    public:
  61    wxExtHelpController();
  62    ~wxExtHelpController();
  63
  64    /** Tell it which browser to use.
  65        The Netscape support will check whether Netscape is already
  66        running (by looking at the .netscape/lock file in the user's
  67        home directory) and tell it to load the page into the existing
  68        window.
  69        @param browsername The command to call a browser/html viewer.
  70        @param isNetscape Set this to true if the browser is some variant of Netscape.
  71    */
  72    // Obsolete form
  73    void SetBrowser(const wxString & browsername = WXEXTHELP_DEFAULTBROWSER,
  74                    bool isNetscape = WXEXTHELP_DEFAULTBROWSER_IS_NETSCAPE);
  75
  76   // Set viewer: new name for SetBrowser
  77   virtual void SetViewer(const wxString& viewer = WXEXTHELP_DEFAULTBROWSER, long flags = wxHELP_NETSCAPE);
  78
  79    /** This must be called to tell the controller where to find the
  80        documentation.
  81        If a locale is set, look in file/localename, i.e.
  82        If passed "/usr/local/myapp/help" and the current wxLocale is
  83        set to be "de", then look in "/usr/local/myapp/help/de/"
  84        first and fall back to "/usr/local/myapp/help" if that
  85        doesn't exist.
  86
  87        @param file - NOT a filename, but a directory name.
  88        @return true on success
  89    */
  90    virtual bool Initialize(const wxString& dir, int WXUNUSED(server))
  91       { return Initialize(dir); }
  92
  93    /** This must be called to tell the controller where to find the
  94        documentation.
  95        If a locale is set, look in file/localename, i.e.
  96        If passed "/usr/local/myapp/help" and the current wxLocale is
  97        set to be "de", then look in "/usr/local/myapp/help/de/"
  98        first and fall back to "/usr/local/myapp/help" if that
  99        doesn't exist.
 100        @param dir - directory name where to fine the help files
 101        @return true on success
 102    */
 103    virtual bool Initialize(const wxString& dir);
 104
 105    /** If file is "", reloads file given in Initialize.
 106        @file Name of help directory.
 107        @return true on success
 108    */
 109    virtual bool LoadFile(const wxString& file = wxEmptyString);
 110
 111    /** Display list of all help entries.
 112        @return true on success
 113    */
 114    virtual bool DisplayContents(void);
 115    /** Display help for id sectionNo.
 116        @return true on success
 117    */
 118    virtual bool DisplaySection(int sectionNo);
 119    /** Display help for id sectionNo -- identical with DisplaySection().
 120        @return true on success
 121    */
 122    virtual bool DisplaySection(const wxString& section);
 123    /** Display help for URL (using DisplayHelp) or keyword (using KeywordSearch)
 124        @return true on success
 125    */
 126    virtual bool DisplayBlock(long blockNo);
 127    /** Search comment/documentation fields in map file and present a
 128        list to chose from.
 129        @key k string to search for, empty string will list all entries
 130        @return true on success
 131    */
 132    virtual bool KeywordSearch(const wxString& k,
 133                               wxHelpSearchMode mode = wxHELP_SEARCH_ALL);
 134
 135    /// does nothing
 136    virtual bool Quit(void);
 137    /// does nothing
 138    virtual void OnQuit(void);
 139
 140    /// Call the browser using a relative URL.
 141    virtual bool DisplayHelp(const wxString &) ;
 142
 143    /// Allows one to override the default settings for the help frame.
 144    virtual void SetFrameParameters(const wxString& WXUNUSED(title),
 145                                    const wxSize& WXUNUSED(size),
 146                                    const wxPoint& WXUNUSED(pos) = wxDefaultPosition,
 147                                    bool WXUNUSED(newFrameEachTime) = false)
 148       {
 149          // does nothing by default
 150       }
 151    /// Obtains the latest settings used by the help frame and the help
 152    /// frame.
 153    virtual wxFrame *GetFrameParameters(wxSize *WXUNUSED(size) = NULL,
 154                                    wxPoint *WXUNUSED(pos) = NULL,
 155                                    bool *WXUNUSED(newFrameEachTime) = NULL)
 156       {
 157          return (wxFrame*) NULL;// does nothing by default
 158       }
 159
 160  protected:
 161    /// Filename of currently active map file.
 162    wxString         m_MapFile;
 163    /// How many entries do we have in the map file?
 164    int              m_NumOfEntries;
 165    /// A list containing all id,url,documentation triples.
 166    wxList          *m_MapList;
 167    /// Deletes the list and all objects.
 168    void DeleteList(void);
 169
 170  private:
 171    /// How to call the html viewer.
 172    wxString         m_BrowserName;
 173    /// Is the viewer a variant of netscape?
 174    bool             m_BrowserIsNetscape;
 175 };
 176
 177 #endif // wxUSE_HELP
 178
 179 #endif // __WX_HELPEXT_H_