mirror of
https://github.com/cookiengineer/audacity
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162 lines
3.8 KiB
Plaintext
162 lines
3.8 KiB
Plaintext
/**********************************************************************
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Audacity: A Digital Audio Editor
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CrossPlatform.dox2
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James Crook
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Documents Cross Platform coding issues.
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********************************************************************//*
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JKC: The examples in this file need to be extracted into a separate file so
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that we can get the comments to show correctly in the output files.
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/*****************************************************************//*!
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\page CrossPlatform Cross Platform Coding Tips
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\brief Guidelines for making the code compile and work on all supported platforms.
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\section PragmaOnce \#pragma once
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The following is not supported under gcc 2.x:
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\code
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// WRONG
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#pragma once
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\endcode
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Instead use the traditional:
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\code
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#ifndef __AUDACITY_HEADER_FILE_NAME__
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#define __AUDACITY_HEADER_FILE_NAME__
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// your header file contents goes here.
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#endif
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\endcode
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\section UnicodeStrings Unicode strings
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Audacity code is translated, and it may be built in Unicode versions.
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For this reason all strings should be wrapped like this:
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\code
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// for strings which are not translated
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mMyFirstString = wxT("some untranslated string");
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// for strings which should be translated
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mMySecondString = _("some translatable string");
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\endcode
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In some cases you need to give hints to a translator about how a
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string should be translated. Do so as follows:
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\dontinclude examples.hh
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\skip i18n-hint
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\until "R"
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Very long strings can be wrapped across multiple lines, as follows:
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\code
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// For untranslated strings:
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wxT("This is a long untranslated string ")
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wxT("which spans several lines ")
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wxT("and works in Unicode builds too")
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// For translated strings:
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_("This is a long translated string "
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wxT("which spans several lines ")
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wxT("and works in Unicode builds too"))
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\endcode
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Notice that in the translated example, all bar the first substring
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are contained within a \p wxT().
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\section ConstructorsAsArguments Constructors as Arguments
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Don't write code like this:
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\code
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// WRONG
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// Now call OnSampleRateChange to update the values.
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OnSampleRateChange( wxCommandEvent() );
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\endcode
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Whilst it is fine under MSVC it will cause a problem under gcc as the
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constructor is a temporary object which will be optimised away.
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Instead use:
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\code
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// Now call OnSampleRateChange to update the values.
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wxCommandEvent e;
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OnSampleRateChange( e );
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\endcode
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\section HeaderFiles Header Files
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Windows systems are not case sensitive, whilst Linux systems are.
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You therefore need to take care in capitalisation, e.g:
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\code
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#include "AttachableScrollBar.h"
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\endcode
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\section ClassNamesInClasses Class Names in Classes
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Microsoft Visual C++ allows you to write code like this in a header file:
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\code
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// WRONG
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class MyClass
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{
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public:
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int MyClass::SomeFunction();
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//... other stuff
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\endcode
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For portability, the \p 'MyClass::' prefix should be left out.
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\section wxStringInFormat Using wxString in Format
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Don't write code like this:
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\code
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wxString Message( wxT("Hello" ));
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// WRONG
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wxString Temp = wxString::Format(wxT("Your said %s in your message"), Message );
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\endcode
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Although MSVC won't complain even in Unicode mode, it generates a warning under gcc.
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Instead you need:
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\code
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wxString Message( wxT("Hello" ));
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wxString Temp = wxString::Format(wxT("Your said %s in your message"), Message.c_str() );
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\endcode
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\section ForwardEnums Forward Declared Enums
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Microsoft Visual C++ allows you to write code like this in a header file:
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\code
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// WRONG
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enum MyEnum;
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\endcode
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That is, you can forward declare an enum just as you can forward
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declare a class. This is not portable. The alternative is to include
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a header file containing the full enum definition.
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\code
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#include "MyEnum.h"
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\endcode
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*//*****************************************************************/
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