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use iup_sys;
use std::ptr;
use std::ffi::CString;

use Element;

/// See the [IUP Button Documentation][1].
/// [1]: http://webserver2.tecgraf.puc-rio.br/iup/en/elem/iupbutton.html
pub struct Button(*mut iup_sys::Ihandle);

impl Button {
    /// Creates a button with no text.
    pub fn new() -> Button {
        unsafe { Button::from_raw(iup_sys::IupButton(ptr::null_mut(), ptr::null_mut())) }
    }

    /// Creates a button with the specified text.
    pub fn with_title<S: Into<String>>(title: S) -> Button {
        let ctitle = CString::new(title.into()).unwrap();
        unsafe { Button::from_raw(iup_sys::IupButton(ctitle.as_ptr(), ptr::null_mut())) }
    }

    // TODO with_image
}

impl_widget!(Button, "button");
impl ::callback::MapCb for Button {}
impl ::callback::UnmapCb for Button {}
impl ::callback::GetFocusCb for Button {}
impl ::callback::KillFocusCb for Button {}
impl ::callback::EnterWindowCb for Button {}
impl ::callback::LeaveWindowCb for Button {}
impl ::callback::HelpCb for Button {}
// TODO impl K_ callbacks when it's implemented.

/// Action generated when the button 1 (usually left) is selected.
///
/// This callback is called only after the mouse is released and when it is released
/// inside the button area.
///
/// `CallbackReturn::Close` will be processed.
impl ::callback::Action for Button {}

/// Action generated when any mouse button is pressed and released.
impl ::callback::button::ButtonCb for Button {}