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