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use std::mem;
use std::ptr;
use std::hash::Hash;
use std::any::TypeId;
use winapi::{HWND, HMENU, UINT, WPARAM, LPARAM, UINT_PTR, DWORD_PTR, LRESULT, DWORD};
use ui::UiInner;
use events::{Event, EventArgs};
use controls::{ControlType, AnyHandle, Timer};
const EVENTS_DISPATCH_ID: UINT_PTR = 2465;
fn parse_listbox_command(id: u64, ncode: u32) -> Option<(u64, Event, EventArgs)> {
use low::defs::{LBN_SELCHANGE, LBN_DBLCLK, LBN_SETFOCUS, LBN_KILLFOCUS};
match ncode {
LBN_SELCHANGE => Some((id, Event::SelectionChanged, EventArgs::None)),
LBN_DBLCLK => Some((id, Event::DoubleClick, EventArgs::None)),
LBN_SETFOCUS | LBN_KILLFOCUS => Some((id, Event::Focus, EventArgs::Focus(ncode==LBN_SETFOCUS))),
_ => None
}
}
fn parse_button_command(id: u64, ncode: u32) -> Option<(u64, Event, EventArgs)> {
use low::defs::{BN_CLICKED, BN_DBLCLK, BN_SETFOCUS, BN_KILLFOCUS};
match ncode {
BN_CLICKED => Some((id, Event::Click, EventArgs::None)),
BN_DBLCLK => Some((id, Event::DoubleClick, EventArgs::None)),
BN_SETFOCUS | BN_KILLFOCUS => Some((id, Event::Focus, EventArgs::Focus(ncode==BN_SETFOCUS))),
_ => None
}
}
fn parse_edit_command(id: u64, ncode: u32) -> Option<(u64, Event, EventArgs)> {
use low::defs::{EN_SETFOCUS, EN_KILLFOCUS, EN_UPDATE, EN_MAXTEXT};
match ncode {
EN_UPDATE => Some((id, Event::ValueChanged, EventArgs::None)),
EN_MAXTEXT => Some((id, Event::LimitReached, EventArgs::None)),
EN_SETFOCUS | EN_KILLFOCUS => Some((id, Event::Focus, EventArgs::Focus(ncode==EN_SETFOCUS))),
_ => None
}
}
fn parse_static_command(id: u64, ncode: u32) -> Option<(u64, Event, EventArgs)> {
use low::defs::{STN_CLICKED, STN_DBLCLK};
match ncode {
STN_CLICKED => Some((id, Event::Click, EventArgs::None)),
STN_DBLCLK => Some((id, Event::DoubleClick, EventArgs::None)),
_ => None
}
}
#[inline(always)]
fn parse_command(id: u64, control_type: ControlType, w: WPARAM) -> Option<(u64, Event, EventArgs)> {
use winapi::HIWORD;
let ncode = HIWORD(w as DWORD) as u32;
match control_type {
ControlType::ListBox => parse_listbox_command(id, ncode),
ControlType::Button => parse_button_command(id, ncode),
ControlType::TextInput | ControlType::TextBox => parse_edit_command(id, ncode),
ControlType::Label => parse_static_command(id, ncode),
_ => None
}
}
#[allow(unused_variables)]
unsafe extern "system" fn process_events<ID: Hash+Clone+'static>(hwnd: HWND, msg: UINT, w: WPARAM, l: LPARAM, id: UINT_PTR, data: DWORD_PTR) -> LRESULT {
use comctl32::DefSubclassProc;
use user32::GetClientRect;
use winapi::{WM_KEYDOWN, WM_KEYUP, WM_UNICHAR, WM_CHAR, UNICODE_NOCHAR, WM_MENUCOMMAND, WM_CLOSE, WM_LBUTTONUP, WM_LBUTTONDOWN,
WM_RBUTTONUP, WM_RBUTTONDOWN, WM_MBUTTONUP, WM_MBUTTONDOWN, WM_COMMAND, WM_TIMER, WM_MOVE, WM_SIZING, WM_EXITSIZEMOVE, WM_SIZE,
WM_PAINT, c_int, LOWORD, HIWORD, RECT};
use low::menu_helper::get_menu_id;
use low::defs::{NWG_CUSTOM_MIN, NWG_CUSTOM_MAX};
let inner: &mut UiInner<ID> = mem::transmute(data);
let inner_id: u64;
let callback_data = match msg {
WM_PAINT => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_PAINT)");;
Some( (inner_id, Event::Paint, EventArgs::None) )
},
WM_COMMAND => {
if l == 0 {
None
} else {
let nhandle: HWND = mem::transmute(l);
if let Some(id) = inner.inner_id_from_handle( &AnyHandle::HWND(nhandle) ) {
let control_type = (&mut *inner.controls.get(&id).expect("Could not find a control with with the specified type ID").as_ptr()).control_type();
parse_command(id, control_type, w)
} else {
None
}
}
},
WM_LBUTTONUP | WM_RBUTTONUP | WM_MBUTTONUP => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_LBUTTONUP | WM_RBUTTONUP | WM_MBUTTONUP)");;
Some( (inner_id, Event::MouseUp, parse_mouse_click(msg, l)) )
},
WM_LBUTTONDOWN | WM_RBUTTONDOWN | WM_MBUTTONDOWN => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_LBUTTONDOWN | WM_RBUTTONDOWN | WM_MBUTTONDOWN)");;
Some( (inner_id, Event::MouseDown, parse_mouse_click(msg, l)) )
},
WM_KEYDOWN | WM_KEYUP => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_KEYDOWN | WM_KEYUP)");;
let evt = if msg == WM_KEYDOWN { Event::KeyDown } else { Event::KeyUp };
Some( (inner_id, evt, EventArgs::Key(w as u32)) )
},
WM_MENUCOMMAND => {
let parent_menu: HMENU = mem::transmute(l);
let handle = AnyHandle::HMENU_ITEM(parent_menu, get_menu_id(parent_menu, w as c_int));
if let Some(inner_id) = inner.inner_id_from_handle( &handle ) {
Some( (inner_id, Event::Triggered, EventArgs::None) )
} else {
None
}
},
WM_UNICHAR | WM_CHAR => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_UNICHAR | WM_CHAR)");;
if w == UNICODE_NOCHAR { return 1; }
if let Some(c) = ::std::char::from_u32(w as u32) {
Some( (inner_id, Event::Char, EventArgs::Char( c )) )
} else {
None
}
},
WM_TIMER => {
let handle = AnyHandle::Custom(TypeId::of::<Timer>(), w as usize);
if let Some(inner_id) = inner.inner_id_from_handle( &handle ) {
let timer: &mut Box<Timer> = mem::transmute( inner.controls.get(&inner_id).unwrap().as_ptr() );
Some( (inner_id, Event::Tick, EventArgs::Tick(timer.elapsed())) )
} else {
None
}
},
WM_MOVE => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_MOVE)");
let (x, y) = (LOWORD(l as u32), HIWORD(l as u32));
Some( (inner_id, Event::Moved, EventArgs::Position(x as i32, y as i32)) )
},
WM_SIZING | WM_SIZE => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_SIZING)");
let mut r: RECT = mem::uninitialized();
GetClientRect(hwnd, &mut r);
let w: u32 = (r.right-r.left) as u32;
let h: u32 = (r.bottom-r.top) as u32;
Some( (inner_id, Event::Resized, EventArgs::Size(w, h)) )
},
WM_EXITSIZEMOVE => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_SIZING)");
let mut r: RECT = mem::uninitialized();
GetClientRect(hwnd, &mut r);
let w: u32 = (r.right-r.left) as u32;
let h: u32 = (r.bottom-r.top) as u32;
Some( (inner_id, Event::Resized, EventArgs::Size(w, h)) )
}
WM_CLOSE => {
inner_id = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ).expect("Could not match system handle to ui control (msg: WM_CLOSE)");
Some( (inner_id, Event::Closed, EventArgs::None) )
},
_ => { None }
};
if let Some((inner_id, evt, params)) = callback_data {
inner.trigger(inner_id, evt, params);
}
if msg < NWG_CUSTOM_MIN || msg > NWG_CUSTOM_MAX {
if let Some(inner_id) = inner.inner_id_from_handle( &AnyHandle::HWND(hwnd) ) {
inner.trigger(inner_id, Event::Raw, EventArgs::Raw(msg, w as usize, l as usize));
}
}
DefSubclassProc(hwnd, msg, w, l)
}
pub fn hook_window_events<ID: Hash+Clone+'static>(uiinner: &mut UiInner<ID>, handle: HWND) { unsafe {
use comctl32::SetWindowSubclass;
let ui_inner_raw: *mut UiInner<ID> = uiinner as *mut UiInner<ID>;
SetWindowSubclass(handle, Some(process_events::<ID>), EVENTS_DISPATCH_ID, mem::transmute(ui_inner_raw));
}}
pub fn unhook_window_events<ID: Hash+Clone+'static>(handle: HWND) { unsafe {
use comctl32::{RemoveWindowSubclass, GetWindowSubclass};
use winapi::{TRUE, DWORD_PTR};
let mut data: DWORD_PTR = 0;
if GetWindowSubclass(handle, Some(process_events::<ID>), EVENTS_DISPATCH_ID, &mut data) == TRUE {
RemoveWindowSubclass(handle, Some(process_events::<ID>), EVENTS_DISPATCH_ID);
}
}}
pub unsafe fn window_id<ID: Clone+Hash>(handle: HWND, inner_ref: *mut UiInner<ID>) -> Option<u64> {
use comctl32::GetWindowSubclass;
use winapi::{TRUE, DWORD_PTR};
let mut data: DWORD_PTR = 0;
if GetWindowSubclass(handle, Some(process_events::<ID>), EVENTS_DISPATCH_ID, &mut data) == TRUE {
let data: *mut UiInner<ID> = mem::transmute(data);
if data == inner_ref {
(&*data).inner_id_from_handle( &AnyHandle::HWND(handle) )
} else {
None
}
} else {
None
}
}
#[inline(always)]
pub unsafe fn dispatch_events() {
use winapi::MSG;
use user32::{GetMessageW, TranslateMessage, DispatchMessageW};
let mut msg: MSG = mem::uninitialized();
while GetMessageW(&mut msg, ptr::null_mut(), 0, 0) != 0 {
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
}
#[inline(always)]
pub unsafe fn exit() {
use user32::PostMessageW;
use winapi::WM_QUIT;
PostMessageW(ptr::null_mut(), WM_QUIT, 0, 0);
}
fn parse_mouse_click(msg: UINT, l: LPARAM) -> EventArgs {
use defs::MouseButton;
use winapi::{WM_LBUTTONUP, WM_LBUTTONDOWN, WM_RBUTTONUP, WM_RBUTTONDOWN, WM_MBUTTONUP, WM_MBUTTONDOWN,
GET_X_LPARAM, GET_Y_LPARAM};
let btn = match msg {
WM_LBUTTONUP | WM_LBUTTONDOWN => MouseButton::Left,
WM_RBUTTONUP | WM_RBUTTONDOWN => MouseButton::Right,
WM_MBUTTONUP | WM_MBUTTONDOWN => MouseButton::Middle,
_ => MouseButton::Left
};
let x = GET_X_LPARAM(l) as i32;
let y = GET_Y_LPARAM(l) as i32;
EventArgs::MouseClick{btn: btn, pos: (x, y)}
}