Experience of Linux and GTK+2 Smartphone

A smartphone is a newcomer that has the ability of personal digital assistants (PDA) with the small appearance of cellular telephones. Although a PDA phone, which is a PDA with a CDMA or GSM module, has bigger appearance, a smartphone is a small device, which looks like a cellular telephone with PDA ability. Most smartphones have adopted Smartphone2002, Smartphone2003 or embedded Linux. Smartphone2002 and Smartphone2003 made by Microsoft have great capability, performance and conveniences. But they are not license-free. Embedded Linux is license-free and gives good opportunity for users and developers to modify it. But most smartphones adopting embedded Linux have PDA appearance. In addition, the graphical user interface (GUI) such as GTK is not proper for the cellular telephone size. In this paper, a smartphone system based on Linux and GTK+2 is proposed. The smartphone system is license-free and small like cellular telephone systems. It supports one-handed operation using keys or touch screen. To adopt Linux as the OS of the smartphone, ETRI's QPlus-P kernel is used. To adopt GTK+2 as the GUI system of the smartphone, GTK+2 is modified to support one-handed operation without touch screen or stylus.