Function widget_add_button_element 

pub unsafe extern "C" fn widget_add_button_element(
    widget: *mut Widget,
    button_type: GuiButtonType,
    text: *const c_char,
    callback: ButtonCallback,
    context: *mut c_void,
)

Add Button Element

Arguments

• widget - Widget instance
• button_type - GuiButtonType instance
• text - text on allocated button
• callback - ButtonCallback instance
• context - pointer to context