70373b5a57
By Robert O'Connor
This is a patch to wxTip Provider classes used by the "Tip of the day" dialog.
See wx-dev archives August 2002 for discussion of the functionality design.
It does 5 things:
-Support for comments inside the tips file. The pound character (#) is used, as recommended by Vadim.
-Allows optional easy translation support to tips, by marking them as translatable for gettext, by enclosing them in a _(""). Program will translate these tips at runtime from the active catalog.
-Blank lines or lines with just spaces are automatically skipped (I had to put this in, I keep wondering why I get blank tips sometimes and it is because the text file had a empty blank line at the end of the text file).
-There is a pluggable virtual function to preprocess to modify the tip in a derived class, in case something specialized is desired, such as variable expansion, etc, as recommended by Julian and Vadim.
-Now resets the tip counter if the previous tip is past the end of the file (ie you removed some tips, or changed tip files), as discussed on wx-dev.
This patch updates:
-The classes.
-The class documentation and the Tip-of-the-day topic overview documentation.
-The dialogs example, placing some new strings for the tips.txt file which demonstrate how to use the Tip-of-the-day features for in practice.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16887 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tipdlg.h
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// Purpose: declaration of wxTipDialog
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 28.06.99
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// RCS-ID: $Id$
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// Copyright: (c) Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TIPDLG_H_
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#define _WX_TIPDLG_H_
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#if defined(__GNUG__) && !defined(__APPLE__)
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#pragma interface "tipdlg.h"
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#endif
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// ----------------------------------------------------------------------------
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// headers which we must include here
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// ----------------------------------------------------------------------------
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#include "wx/defs.h"
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#if wxUSE_STARTUP_TIPS
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#include "wx/textfile.h"
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// ----------------------------------------------------------------------------
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// wxTipProvider - a class which is used by wxTipDialog to get the text of the
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// tips
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// ----------------------------------------------------------------------------
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// the abstract base class: it provides the tips, i.e. implements the GetTip()
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// function which returns the new tip each time it's called. To support this,
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// wxTipProvider evidently needs some internal state which is the tip "index"
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// and which should be saved/restored by the program to not always show one and
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// the same tip (of course, you may use random starting position as well...)
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class WXDLLEXPORT wxTipProvider
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{
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public:
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wxTipProvider(size_t currentTip) { m_currentTip = currentTip; }
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// get the current tip and update the internal state to return the next tip
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// when called for the next time
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virtual wxString GetTip() = 0;
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// get the current tip "index" (or whatever allows the tip provider to know
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// from where to start the next time)
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size_t GetCurrentTip() const { return m_currentTip; }
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// Allows any user-derived class to optionally override this function to
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// modify the tip as soon as it is read. If return wxEmptyString, then
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// the tip is skipped, and the next one is read.
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virtual wxString PreprocessTip(const wxString& tip) { return tip; }
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// virtual dtor for the base class
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virtual ~wxTipProvider() { }
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protected:
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size_t m_currentTip;
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};
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// a function which returns an implementation of wxTipProvider using the
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// specified text file as the source of tips (each line is a tip).
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//
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// NB: the caller is responsible for deleting the pointer!
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WXDLLEXPORT wxTipProvider *wxCreateFileTipProvider(const wxString& filename,
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size_t currentTip);
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// ----------------------------------------------------------------------------
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// wxTipDialog
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// ----------------------------------------------------------------------------
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// A dialog which shows a "tip" - a short and helpful messages describing to
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// the user some program characteristic. Many programs show the tips at
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// startup, so the dialog has "Show tips on startup" checkbox which allows to
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// the user to disable this (however, it's the program which should show, or
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// not, the dialog on startup depending on its value, not this class).
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//
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// The function returns TRUE if this checkbox is checked, FALSE otherwise.
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WXDLLEXPORT bool wxShowTip(wxWindow *parent,
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wxTipProvider *tipProvider,
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bool showAtStartup = TRUE);
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#endif // wxUSE_STARTUP_TIPS
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#endif // _WX_TIPDLG_H_
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