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made wxLogGui more flexible and documented it and added example of customizing it to the dialogs sample (now with the docs)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55554 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2008-09-11 14:03:48 +00:00
parent fe26031e26
commit 5d81550097
1 changed files with 183 additions and 14 deletions
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197
interface/wx/log.h
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@@ -188,11 +188,50 @@ public:
/**
@class wxLogGui
This is the default log target for the GUI wxWidgets applications. It is passed
to wxLog::SetActiveTarget at the program
startup and is deleted by wxWidgets during the program shut down.
This is the default log target for the GUI wxWidgets applications.
@library{wxbase}
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 DoShowSingleMessage() to customize
wxLogGui -- the dialogs sample shows how to do this.
@library{wxcore}
@category{logging}
*/
class wxLogGui : public wxLog
@@ -202,6 +241,138 @@ 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();
/**
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);
/**
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;
};
@@ -494,9 +665,6 @@ public:
*/
static void ClearTraceMasks();
*/
/**
Disables time stamping of the log messages.
This function is new since wxWidgets version 2.9
@@ -629,17 +797,18 @@ public:
static void RemoveTraceMask(const wxString& mask);
/**
Resumes logging previously suspended by a call to
Suspend(). All messages logged in the meanwhile will be
flushed soon.
Resumes logging previously suspended by a call to Suspend().
All messages logged in the meanwhile will be flushed soon.
*/
static void Resume();
/**
Sets the specified log target as the active one. Returns the pointer to the
previous active log target (may be @NULL). To suppress logging use a new
instance of wxLogNull not @NULL. If the active log target is set to @NULL a
new default log target will be created when logging occurs.
Sets the specified log target as the active one.
Returns the pointer to the previous active log target (may be @NULL).
To suppress logging use a new instance of wxLogNull not @NULL. If the
active log target is set to @NULL a new default log target will be
created when logging occurs.
*/
static wxLog* SetActiveTarget(wxLog* logtarget);