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use crate::controls::ControlHandle;
use crate::win32::window::bind_raw_event_handler_inner;
use crate::win32::window_helper as wh;
use crate::NwgError;
use winapi::shared::windef::{HWND};
use std::rc::Rc;
use std::cell::RefCell;
use std::ptr;
#[derive(Debug)]
pub struct DynLayoutItem {
control: HWND,
pos_init: (i32, i32),
size_init: (i32, i32),
mv: (i32, i32),
sz: (i32, i32)
}
impl DynLayoutItem {
pub fn new<W: Into<ControlHandle>>(c: W, mv: (i32, i32), sz: (i32, i32)) -> DynLayoutItem {
let control = c.into().hwnd().expect("Child must be a window-like control (HWND handle)");
let pos_init = (0, 0);
let size_init = (0, 0);
DynLayoutItem{ control, pos_init, size_init, mv, sz }
}
}
pub struct DynLayoutInner {
base: HWND,
children: Vec<DynLayoutItem>,
}
#[derive(Clone)]
pub struct DynLayout {
inner: Rc<RefCell<DynLayoutInner>>
}
impl DynLayout {
pub fn builder() -> DynLayoutBuilder {
let layout = DynLayoutInner {
base: ptr::null_mut(),
children: Vec::new(),
};
DynLayoutBuilder { layout }
}
pub fn parent<W: Into<ControlHandle>>(&self, p: W) {
let mut inner = self.inner.borrow_mut();
inner.base = p.into().hwnd().expect("Parent must be HWND");
}
pub fn add_child<W: Into<ControlHandle>>(&self, m: (i32, i32), s: (i32, i32), c: W) {
let hwnd = c.into().hwnd().expect("Child must be a window-like control (HWND handle)");
let pos = unsafe { wh::get_window_position(hwnd) };
let size = unsafe { wh::get_window_size(hwnd) };
let (whost, hhost) = unsafe { wh::get_window_size(self.inner.borrow_mut().base) };
let xdelta = 0.01 * whost as f32;
let ydelta = 0.01 * hhost as f32;
let mut xpos = pos.0;
if m.0 > 0 { xpos -= (xdelta * m.0 as f32) as i32; }
let mut ypos = pos.1;
if m.1 > 0 { ypos -= (ydelta * m.1 as f32) as i32; }
let mut xsize = size.0 as i32;
if s.0 > 0 { xsize -= (xdelta * s.0 as f32) as i32; }
let mut ysize = size.1 as i32;
if s.1 > 0 { ysize -= (ydelta * s.1 as f32) as i32; }
let item = DynLayoutItem {
control: hwnd,
pos_init: (xpos, ypos),
size_init: (xsize, ysize),
mv: m,
sz: s
};
self.add_child_item(item);
}
pub fn add_child_item(&self, i: DynLayoutItem) {
let base = {
let mut inner = self.inner.borrow_mut();
if inner.base.is_null() {
panic!("DynLayout is not initialized");
}
inner.children.push(i);
inner.base
};
let (w, h) = unsafe { wh::get_window_size(base) };
self.update_layout(w as u32, h as u32);
}
pub fn remove_child<W: Into<ControlHandle>>(&self, c: W) {
let base = {
let mut inner = self.inner.borrow_mut();
if inner.base.is_null() {
panic!("DynLayout is not initialized");
}
let handle = c.into().hwnd().expect("Control must be window-like (HWND handle)");
let index = inner.children.iter().position(|item| item.control == handle);
match index {
Some(i) => { inner.children.remove(i); },
None => { return; }
}
inner.base
};
let (w, h) = unsafe { wh::get_window_size(base) };
self.update_layout(w as u32, h as u32);
}
pub fn has_child<W: Into<ControlHandle>>(&self, c: W) -> bool {
let inner = self.inner.borrow();
if inner.base.is_null() {
panic!("DynLayout is not initialized");
}
let handle = c.into().hwnd().expect("Children is not a window-like control (HWND handle)");
inner.children.iter().any(|c| c.control == handle )
}
pub fn resize(&self, w: u32, h: u32) {
let inner = self.inner.borrow();
if inner.base.is_null() {
panic!("Layout is not bound to a parent control.")
}
self.update_layout(w, h);
}
pub fn fit(&self) {
let inner = self.inner.borrow();
if inner.base.is_null() {
panic!("Layout is not bound to a parent control.")
}
let (w, h) = unsafe { wh::get_window_size(inner.base) };
self.update_layout(w, h);
}
fn update_layout(&self, width: u32, height: u32) -> () {
use winapi::um::winuser::{BeginDeferWindowPos, DeferWindowPos, EndDeferWindowPos};
use winapi::um::winuser::{HWND_TOP, SWP_NOZORDER, SWP_NOREPOSITION, SWP_NOACTIVATE, SWP_NOCOPYBITS};
use winapi::ctypes::c_int;
let inner = self.inner.borrow();
if inner.base.is_null() || inner.children.len() == 0 {
return;
}
let xdelta = 0.01 * width as f32;
let ydelta = 0.01 * height as f32;
unsafe {
let hdwp = BeginDeferWindowPos(inner.children.len() as c_int);
let mut last_handle = None;
for item in inner.children.iter() {
let mut x = item.pos_init.0;
if item.mv.0 > 0 { x += (xdelta * item.mv.0 as f32) as i32; }
let mut y = item.pos_init.1;
if item.mv.1 > 0 { y += (ydelta * item.mv.1 as f32) as i32; }
let mut w = item.size_init.0;
if item.sz.0 > 0 { w += (xdelta * item.sz.0 as f32) as i32; }
let mut h = item.size_init.1;
if item.sz.1 > 0 { h += (ydelta * item.sz.1 as f32) as i32; }
DeferWindowPos(hdwp, item.control, HWND_TOP, x, y, w, h, SWP_NOZORDER | SWP_NOREPOSITION | SWP_NOACTIVATE | SWP_NOCOPYBITS);
wh::set_window_after(item.control, last_handle);
last_handle = Some(item.control);
}
EndDeferWindowPos(hdwp);
}
}
}
impl Default for DynLayout {
fn default() -> DynLayout {
let inner = DynLayoutInner {
base: ptr::null_mut(),
children: Vec::new(),
};
DynLayout {
inner: Rc::new(RefCell::new(inner))
}
}
}
pub struct DynLayoutBuilder {
layout: DynLayoutInner
}
impl DynLayoutBuilder {
pub fn parent<W: Into<ControlHandle>>(mut self, p: W) -> DynLayoutBuilder {
self.layout.base = p.into().hwnd().expect("Parent must be HWND");
self
}
pub fn child<W: Into<ControlHandle>>(mut self, m: (i32, i32), s: (i32, i32), c: W) -> DynLayoutBuilder {
let hwnd = c.into().hwnd().expect("Child must be HWND");
let pos = unsafe { wh::get_window_position(hwnd) };
let size = unsafe { wh::get_window_size(hwnd) };
self.layout.children.push(DynLayoutItem {
control: hwnd,
pos_init: pos,
size_init: (size.0 as i32, size.1 as i32),
mv: m,
sz: s
});
self
}
pub fn child_item(mut self, item: DynLayoutItem) -> DynLayoutBuilder {
self.layout.children.push(item);
self
}
pub fn build(self, layout: &DynLayout) -> Result<(), NwgError> {
use winapi::um::winuser::WM_SIZE;
use winapi::shared::minwindef::{HIWORD, LOWORD};
if self.layout.base.is_null() {
return Err(NwgError::layout_create("DynLayout does not have a parent."));
}
let (w, h) = unsafe { wh::get_window_size(self.layout.base) };
let base_handle = ControlHandle::Hwnd(self.layout.base);
{
let mut layout_inner = layout.inner.borrow_mut();
*layout_inner = self.layout;
}
layout.update_layout(w, h);
let event_layout = layout.clone();
let cb = move |_h, msg, _w, l| {
if msg == WM_SIZE {
let size = l as u32;
let width = LOWORD(size) as i32;
let height = HIWORD(size) as i32;
let (w, h) = unsafe { crate::win32::high_dpi::physical_to_logical(width, height) };
DynLayout::update_layout(&event_layout, w as u32, h as u32);
}
None
};
static mut BOX_LAYOUT_ID: usize = 0x8FFF;
bind_raw_event_handler_inner(&base_handle, unsafe { BOX_LAYOUT_ID += 1; BOX_LAYOUT_ID }, cb).unwrap();
Ok(())
}
}