A number of guides and documents are available that cover porting issues, from detailed coverage of API differences between Qt 3 and Qt 4 to platform and tool-specific documentation.
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Porting advice for authors of new and existing Qt 3 applications. |
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Information about changes to the UI file format in Qt 4. |
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Hints and tips to assist with porting canvas applications to the Graphics View framework. |
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An overview of issues and techniques to consider when porting from Qt 3 to Qt 4. |
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An overview of the porting process for applications that use drag and drop. |
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An overview of changes to virtual functions in Qt 4. |
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