mirror of
https://github.com/cookiengineer/audacity
synced 2025-04-30 15:49:41 +02:00
c478e12b48
... In this case, the ambiguity resolution was correct for the intent, but we shouldn't rely on that.
97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
/*!********************************************************************
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Audacity: A Digital Audio Editor
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@file AudacityException.cpp
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@brief Implements AudacityException and related
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Paul Licameli
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***********************************************************************/
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#include "Audacity.h"
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#include "AudacityException.h"
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#include <wx/atomic.h>
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#include "widgets/AudacityMessageBox.h"
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#include "widgets/ErrorDialog.h"
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AudacityException::~AudacityException()
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{
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}
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wxAtomicInt sOutstandingMessages {};
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MessageBoxException::MessageBoxException( const TranslatableString &caption_ )
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: caption{ caption_ }
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{
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if (!caption.empty())
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wxAtomicInc( sOutstandingMessages );
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else
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// invalidate me
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moved = true;
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}
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// The class needs a copy constructor to be throwable
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// (or will need it, by C++14 rules). But the copy
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// needs to act like a move constructor. There must be unique responsibility
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// for each exception thrown to decrease the global count when it is handled.
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MessageBoxException::MessageBoxException( const MessageBoxException& that )
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{
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caption = that.caption;
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moved = that.moved;
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helpUrl = that.helpUrl;
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that.moved = true;
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}
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MessageBoxException::~MessageBoxException()
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{
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if (!moved)
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// If exceptions are used properly, you should never reach this,
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// because moved should become true earlier in the object's lifetime.
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wxAtomicDec( sOutstandingMessages );
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}
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SimpleMessageBoxException::~SimpleMessageBoxException()
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{
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}
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TranslatableString SimpleMessageBoxException::ErrorMessage() const
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{
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return message;
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}
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// This is meant to be invoked via wxEvtHandler::CallAfter
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void MessageBoxException::DelayedHandlerAction()
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{
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if (!moved) {
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// This test prevents accumulation of multiple messages between idle
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// times of the main even loop. Only the last queued exception
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// displays its message. We assume that multiple messages have a
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// common cause such as exhaustion of disk space so that the others
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// give the user no useful added information.
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if ( wxAtomicDec( sOutstandingMessages ) == 0 ) {
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if (ErrorHelpUrl().IsEmpty())
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{
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::AudacityMessageBox(
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ErrorMessage(),
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(caption.empty() ? AudacityMessageBoxCaptionStr() : caption),
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wxICON_ERROR
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);
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}
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else
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{
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ShowErrorDialog(
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nullptr,
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(caption.empty() ? AudacityMessageBoxCaptionStr() : caption),
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ErrorMessage(),
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ErrorHelpUrl());
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}
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}
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moved = true;
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}
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}
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