+#endif // wxUSE_BASE
+
+#if wxUSE_GUI
+
+/**
+ @class wxLogWindow
+
+ This class represents a background log window: to be precise, it collects all
+ log messages in the log frame which it manages but also passes them on to the
+ log target which was active at the moment of its creation. This allows you, for
+ example, to show all the log messages in a frame but still continue to process
+ them normally by showing the standard log dialog.
+
+ @library{wxcore}
+ @category{logging}
+
+ @see wxLogTextCtrl
+*/
+class wxLogWindow : public wxLogInterposer
+{
+public:
+ /**
+ Creates the log frame window and starts collecting the messages in it.
+
+ @param pParent
+ The parent window for the log frame, may be @NULL
+ @param szTitle
+ The title for the log frame
+ @param show
+ @true to show the frame initially (default), otherwise
+ Show() must be called later.
+ @param passToOld
+ @true to process the log messages normally in addition to logging them
+ in the log frame (default), @false to only log them in the log frame.
+ Note that if no targets were set using wxLog::SetActiveTarget() then
+ wxLogWindow simply becomes the active one and messages won't be passed
+ to other targets.
+ */
+ wxLogWindow(wxWindow* pParent, const wxString& szTitle, bool show = true,
+ bool passToOld = true);
+
+ /**
+ Returns the associated log frame window. This may be used to position or resize
+ it but use Show() to show or hide it.
+ */
+ wxFrame* GetFrame() const;
+
+ /**
+ Called if the user closes the window interactively, will not be
+ called if it is destroyed for another reason (such as when program
+ exits).
+
+ Return @true from here to allow the frame to close, @false to
+ prevent this from happening.
+
+ @see OnFrameDelete()
+ */
+ virtual bool OnFrameClose(wxFrame* frame);
+
+ /**
+ Called immediately after the log frame creation allowing for
+ any extra initializations.
+ */
+ virtual void OnFrameCreate(wxFrame* frame);
+
+ /**
+ Called right before the log frame is going to be deleted: will
+ always be called unlike OnFrameClose().
+ */
+ virtual void OnFrameDelete(wxFrame* frame);
+
+ /**
+ Shows or hides the frame.
+ */
+ void Show(bool show = true);
+};
+
+
+
+/**
+ @class wxLogGui
+
+ This is the default log target for the GUI wxWidgets applications.
+
+ Please see @ref overview_log_customize for explanation of how to change the
+ default log target.
+
+ An object of this class is used by default to show the log messages created
+ by using wxLogMessage(), wxLogError() and other logging functions. It
+ doesn't display the messages logged by them immediately however but
+ accumulates all messages logged during an event handler execution and then
+ shows them all at once when its Flush() method is called during the idle
+ time processing. This has the important advantage of showing only a single
+ dialog to the user even if several messages were logged because of a single
+ error as it often happens (e.g. a low level function could log a message
+ because it failed to open a file resulting in its caller logging another
+ message due to the failure of higher level operation requiring the use of
+ this file). If you need to force the display of all previously logged
+ messages immediately you can use wxLog::FlushActive() to force the dialog
+ display.
+
+ Also notice that if an error message is logged when several informative
+ messages had been already logged before, the informative messages are
+ discarded on the assumption that they are not useful -- and may be
+ confusing and hence harmful -- any more after the error. The warning
+ and error messages are never discarded however and any informational
+ messages logged after the first error one are also kept (as they may
+ contain information about the error recovery). You may override DoLog()
+ method to change this behaviour.
+
+ At any rate, it is possible that that several messages were accumulated
+ before this class Flush() method is called. If this is the case, Flush()
+ uses a custom dialog which shows the last message directly and allows the
+ user to view the previously logged ones by expanding the "Details"
+ wxCollapsiblePane inside it. This custom dialog also provides the buttons
+ for copying the log messages to the clipboard and saving them to a file.
+
+ However if only a single message is present when Flush() is called, just a
+ wxMessageBox() is used to show it. This has the advantage of being closer
+ to the native behaviour but it doesn't give the user any possibility to
+ copy or save the message (except for the recent Windows versions where @c
+ Ctrl-C may be pressed in the message box to copy its contents to the
+ clipboard) so you may want to override DoShowSingleLogMessage() to
+ customize wxLogGui -- the dialogs sample shows how to do this.
+
+ @library{wxcore}
+ @category{logging}
+*/
+class wxLogGui : public wxLog
+{
+public:
+ /**
+ Default constructor.
+ */
+ wxLogGui();
+
+ /**
+ Presents the accumulated log messages, if any, to the user.
+
+ This method is called during the idle time and should show any messages
+ accumulated in wxLogGui#m_aMessages field to the user.
+ */
+ virtual void Flush();
+
+protected:
+ /**
+ Returns the appropriate title for the dialog.
+
+ The title is constructed from wxApp::GetAppDisplayName() and the
+ severity string (e.g. "error" or "warning") appropriate for the current
+ wxLogGui#m_bErrors and wxLogGui#m_bWarnings values.
+ */
+ wxString GetTitle() const;
+
+ /**
+ Returns wxICON_ERROR, wxICON_WARNING or wxICON_INFORMATION depending on
+ the current maximal severity.
+
+ This value is suitable to be used in the style parameter of
+ wxMessageBox() function.
+ */
+ int GetSeverityIcon() const;
+
+ /**
+ Forgets all the currently stored messages.
+
+ If you override Flush() (and don't call the base class version), you
+ must call this method to avoid messages being logged over and over
+ again.
+ */
+ void Clear();
+
+
+ /**
+ All currently accumulated messages.
+
+ This array may be empty if no messages were logged.
+
+ @see m_aSeverity, m_aTimes
+ */
+ wxArrayString m_aMessages;
+
+ /**
+ The severities of each logged message.
+
+ This array is synchronized with wxLogGui#m_aMessages, i.e. the n-th
+ element of this array corresponds to the severity of the n-th message.
+ The possible severity values are @c wxLOG_XXX constants, e.g.
+ wxLOG_Error, wxLOG_Warning, wxLOG_Message etc.
+ */
+ wxArrayInt m_aSeverity;
+
+ /**
+ The time stamps of each logged message.
+
+ The elements of this array are time_t values corresponding to the time
+ when the message was logged.
+ */
+ wxArrayLong m_aTimes;
+
+ /**
+ True if there any error messages.
+ */
+ bool m_bErrors;
+
+ /**
+ True if there any warning messages.
+
+ If both wxLogGui#m_bErrors and this member are false, there are only
+ informational messages to be shown.
+ */
+ bool m_bWarnings;
+
+ /**
+ True if there any messages to be shown to the user.
+
+ This variable is used instead of simply checking whether
+ wxLogGui#m_aMessages array is empty to allow blocking further calls to
+ Flush() while a log dialog is already being shown, even if the messages
+ array hasn't been emptied yet.
+ */
+ bool m_bHasMessages;
+
+private:
+ /**
+ Method called by Flush() to show a single log message.
+
+ This function can be overridden to show the message in a different way.
+ By default a simple wxMessageBox() call is used.
+
+ @param message
+ The message to show (it can contain multiple lines).
+ @param title
+ The suggested title for the dialog showing the message, see
+ GetTitle().
+ @param style
+ One of @c wxICON_XXX constants, see GetSeverityIcon().
+ */
+ virtual void DoShowSingleLogMessage(const wxString& message,
+ const wxString& title,
+ int style);
+
+ /**
+ Method called by Flush() to show multiple log messages.
+
+ This function can be overridden to show the messages in a different way.
+ By default a special log dialog showing the most recent message and
+ allowing the user to expand it to view the previously logged ones is
+ used.
+
+ @param messages
+ Array of messages to show; it contains more than one element.
+ @param severities
+ Array of message severities containing @c wxLOG_XXX values.
+ @param times
+ Array of time_t values indicating when each message was logged.
+ @param title
+ The suggested title for the dialog showing the message, see
+ GetTitle().
+ @param style
+ One of @c wxICON_XXX constants, see GetSeverityIcon().
+ */
+ virtual void DoShowMultipleLogMessages(const wxArrayString& messages,
+ const wxArrayInt& severities,
+ const wxArrayLong& times,
+ const wxString& title,
+ int style);
+};
+
+
+
+/**
+ @class wxLogTextCtrl
+
+ Using these target all the log messages can be redirected to a text control.
+ The text control must have been created with @c wxTE_MULTILINE style by the
+ caller previously.
+
+ @library{wxcore}
+ @category{logging}
+
+ @see wxTextCtrl, wxStreamToTextRedirector
+*/
+class wxLogTextCtrl : public wxLog
+{
+public:
+ /**
+ Constructs a log target which sends all the log messages to the given text
+ control. The @a textctrl parameter cannot be @NULL.
+ */
+ wxLogTextCtrl(wxTextCtrl* pTextCtrl);
+};
+
+
+#endif // wxUSE_GUI
+
+#if wxUSE_BASE
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