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Thomas Zander authored
we need a better way to do progress notification for various actions. A simple usecase is a user action or filter that can be split into multiple subactions which each have their independent progress indication. We want to show the total progress in a progressBar. This new class does that and all of the following features: * threadsafe * be able to handle more than one concurrent action * be safe * be cancelable * non-modal * be fast * be really easy to use svn path=/trunk/koffice/; revision=599863
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