Touchscreen Command Interface Based on Pie Menus

Tema ovoga rada su kružni izbornici te njihova primjena na zaslonima osjetljivim na dodir. Za potrebe rada razvijena je aplikacija Organizator koja omogućava organizaciju projekata i dnevnih obveza, a kao glavnu metodu interakcije koristi serijski kružni izbornik koji se može zamijeniti linearnim izbornikom. Aplikacija je razvijena za operativni sustav android te je prilagođena uređajima s različitim veličinama zaslona. Kako bi se utvrdila upotrebljivost aplikacije i kružnog izbornika u njezinom sastavu te kako bi se usporedili kružni i linearni izbornici proveden je eksperiment na osmorici ispitanika. Provedena su mjerenja vremena riješavanja i broja grešaka na različitim zadatcima. Mjerenja su provedna za kružni i linearni izbornik. Također, ispitanici su ocjenili svoj subjektivni dojam aplikacije i metoda interakcije. Rezultati eksperimenta su analizirani te je utvrđeno da je kružni izbornik razvijen u sklopu ovog rada neznatno brži ali i nepouzdaniji od njegove odgovarajuće linearne izvedbe.Topic of this thesis are pie menus and their usage on touchscreens. Application named Organizer was developed to better understand the usage of pie menus on touchscreen enabled devices. This aplication enables user to organize his projects and tasks, also it uses a sequential pie menu as it's primary mode of interaction. Application was developed for devices running android operating system for use on various screen sizes. In order to determine the usability of the application and the pie menu it uses an experiment was conducted on eight test subjects. Test subjects were given various tasks and time of completion and number of errors were mesured. Measures were conducted for both pie and linear menu in order to compare results. Aswell, test subjects rated the application and methods of interaction using System Usability Scale. Results of the experiment were analyzed and the conclusion was made that the developed pie menu was sligthly faster than linear menu, but it was also less reliable