Nana - a C++ framework project  The Programmer's Guide

The tabstop in Nana.GUI     A tabstop is used for switching the keyboard focus between two widgets by pressing the Tab in Nana.GUI, Nana.GUI defines 3 states for tabstop.     Every Nana.GUI window defaultly does not take care about the tabstop, but when implement a widget, programmers must pay attention to the tabstop. If a widget owns the tabstop, the widget would catch the keyboard focus when the Tab key is pressed. If a widget is eating-tab, the widget can deal with the tab in the key_char event, and the focus could not changed, a textbox is eating-tab. If a widget does not take care about the tabstop, it will ignore the message.     There are two functions about the tabstop defined in nana::gui::API, tabstop is used for setting a widget owns a tabstop, eat_tabstop is used for setting a widget as eating tabstop. A widget can be set both tabstop and eat_tabstop, for example, a textbox has been set both tabstop and eat_tabstop, if the textbox is not focused, a user can press Tab key to switch the focus on it, and then the user press a Tab key again, a Tab character is inputted into the textbox and the focus is not changed. Move to The Nana Programmer's Guide Main Page