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use std::hash::Hash;
use std::ptr;
use std::ops::{Deref, DerefMut};
use std::marker::PhantomData;
use std::collections::HashMap;
use winapi::{HWND, ID2D1Factory, ID2D1HwndRenderTarget, ID2D1SolidColorBrush, ID2D1StrokeStyle,
S_OK, D2D1_MATRIX_3X2_F};
use controls::{Control, ControlType, AnyHandle};
use error::{Error, SystemError};
use super::{CanvasRenderer, RendererProtected, build_render_target, CANVAS_CLASS_NAME};
use defs;
#[derive(Clone)]
pub enum CanvasResources {
SolidBrush(*mut ID2D1SolidColorBrush),
StrokeStyle(*mut ID2D1StrokeStyle)
}
pub struct Canvas<ID: Clone+Hash> {
handle: HWND,
factory: *mut ID2D1Factory,
render_target: *mut ID2D1HwndRenderTarget,
must_recreate_target: bool,
resources: HashMap<u64, CanvasResources>,
p: PhantomData<ID>
}
impl<ID: Clone+Hash> Canvas<ID> {
pub fn renderer<'a>(&'a mut self) -> Result<CanvasRenderer<'a, ID>, Error> {
CanvasRenderer::prepare(self)
}
pub fn create_solid_brush(&mut self, name: &ID, brush: &defs::SolidBrush) -> Result<(), Error> {
use winapi::{D2D1_COLOR_F, D2D1_BRUSH_PROPERTIES};
let id = Canvas::hash_id(name);
if self.resources.contains_key(&id) {
return Err(Error::KeyExists);
}
let c = &brush.color;
let color = D2D1_COLOR_F{r: c.0, g: c.1, b: c.2, a: c.3};
let identity = D2D1_MATRIX_3X2_F {matrix: [[1.0, 0.0],[0.0, 1.0],[0.0, 0.0]]};
let property = D2D1_BRUSH_PROPERTIES { opacity: 1.0, transform: identity};
let mut brush: *mut ID2D1SolidColorBrush = ptr::null_mut();
let result = unsafe{ self.CreateSolidColorBrush(&color, &property, &mut brush) };
if result == S_OK {
self.resources.insert(id, CanvasResources::SolidBrush(brush));
Ok(())
} else {
Err(Error::System(SystemError::ComError("Failed to import brush".to_string())))
}
}
pub fn create_pen(&mut self, name: &ID, pen: &defs::Pen) -> Result<(), Error> {
use winapi::{D2D1_STROKE_STYLE_PROPERTIES, D2D1_CAP_STYLE, D2D1_LINE_JOIN, D2D1_DASH_STYLE};
let id = Canvas::hash_id(name);
if self.resources.contains_key(&id) {
return Err(Error::KeyExists);
}
let pen = pen.clone();
let start_cap = D2D1_CAP_STYLE(pen.start_cap as u32);
let end_cap = D2D1_CAP_STYLE(pen.end_cap as u32);
let dash_cap = D2D1_CAP_STYLE(pen.dash_cap as u32);
let line_join = D2D1_LINE_JOIN(pen.line_join as u32);
let dash_style = D2D1_DASH_STYLE(pen.dash_style as u32);
let stroke_style_prop = D2D1_STROKE_STYLE_PROPERTIES {
startCap: start_cap,
endCap: end_cap,
dashCap: dash_cap,
lineJoin: line_join,
miterLimit: pen.miter_limit,
dashStyle: dash_style,
dashOffset: pen.dash_offset
};
let mut stroke_style: *mut ID2D1StrokeStyle = ptr::null_mut();
let result = unsafe{ (&mut *self.factory).CreateStrokeStyle(&stroke_style_prop, ptr::null(), 0, &mut stroke_style) };
if result == S_OK {
self.resources.insert(id, CanvasResources::StrokeStyle(stroke_style));
Ok(())
} else {
Err(Error::System(SystemError::ComError("Failed to import brush".to_string())))
}
}
pub fn redraw(&self) {
use user32::RedrawWindow;
use winapi::{RDW_ERASE, RDW_INVALIDATE};
unsafe {
RedrawWindow(self.handle, ptr::null(), ptr::null_mut(), RDW_ERASE|RDW_INVALIDATE);
}
}
pub fn set_render_size(&mut self, w: u32, h: u32) {
use winapi::D2D_SIZE_U;
let render_size = D2D_SIZE_U{width: w, height: h};
unsafe{ self.Resize(&render_size); }
}
pub fn get_dpi(&mut self) -> (f32, f32) {
let mut x = 0.0f32;
let mut y = 0.0f32;
unsafe { self.GetDpi(&mut x, &mut y); }
(x, y)
}
pub fn set_dpi(&mut self, dpix: f32, fpiy: f32) {
unsafe { self.SetDpi(dpix, fpiy); }
}
#[inline(always)]
fn hash_id(id: &ID) -> u64 {
use std::hash::Hasher;
use std::collections::hash_map::DefaultHasher;
let mut s1 = DefaultHasher::new();
id.hash(&mut s1);
s1.finish()
}
pub fn get_visibility(&self) -> bool { unsafe{ ::low::window_helper::get_window_visibility(self.handle) } }
pub fn set_visibility(&self, visible: bool) { unsafe{ ::low::window_helper::set_window_visibility(self.handle, visible); }}
pub fn get_position(&self) -> (i32, i32) { unsafe{ ::low::window_helper::get_window_position(self.handle) } }
pub fn set_position(&self, x: i32, y: i32) { unsafe{ ::low::window_helper::set_window_position(self.handle, x, y); }}
pub fn get_size(&self) -> (u32, u32) { unsafe{ ::low::window_helper::get_window_size(self.handle) } }
pub fn set_size(&self, w: u32, h: u32) { unsafe{ ::low::window_helper::set_window_size(self.handle, w, h, true); } }
pub fn get_enabled(&self) -> bool { unsafe{ ::low::window_helper::get_window_enabled(self.handle) } }
pub fn set_enabled(&self, e:bool) { unsafe{ ::low::window_helper::set_window_enabled(self.handle, e); } }
}
impl<ID: Clone+Hash> Control for Canvas<ID> {
fn handle(&self) -> AnyHandle {
AnyHandle::HWND(self.handle)
}
fn control_type(&self) -> ControlType {
ControlType::Canvas
}
fn free(&mut self) {
unsafe{
use user32::{DestroyWindow, UnregisterClassW};
use kernel32::GetModuleHandleW;
use low::other_helper::to_utf16;
let factory = &mut *self.factory;
let render_target = &mut *self.render_target;
for (_, v) in self.resources.drain() {
match v {
CanvasResources::SolidBrush(r) => { (&mut *r).Release(); },
CanvasResources::StrokeStyle(s) => { (&mut *s).Release(); },
}
}
render_target.Release();
factory.Release();
DestroyWindow(self.handle);
let cls = to_utf16(CANVAS_CLASS_NAME);
let hmod = GetModuleHandleW(ptr::null_mut());
UnregisterClassW(cls.as_ptr(), hmod);
};
}
}
impl<'a, ID: Clone+Hash> Deref for Canvas<ID> {
type Target = ID2D1HwndRenderTarget;
#[inline(always)]
fn deref(&self) -> &ID2D1HwndRenderTarget {
unsafe{ & *self.render_target }
}
}
impl<'a, ID: Clone+Hash> DerefMut for Canvas<ID> {
#[inline(always)]
fn deref_mut(&mut self) -> &mut ID2D1HwndRenderTarget {
unsafe{ &mut *self.render_target }
}
}
pub trait CanvasProtected<ID: Clone+Hash> {
fn get_must_recreate_target(&mut self) -> bool;
fn set_must_recreate_target(&mut self, recreate: bool);
fn create(h: HWND, f: *mut ID2D1Factory, r: *mut ID2D1HwndRenderTarget) -> Canvas<ID>;
fn rebuild(&mut self) -> Result<(), SystemError>;
fn get_resource(&mut self, id: &ID) -> Result<CanvasResources, Error>;
}
impl<ID: Clone+Hash> CanvasProtected<ID> for Canvas<ID> {
fn get_must_recreate_target(&mut self) -> bool {
self.must_recreate_target
}
fn set_must_recreate_target(&mut self, recreate: bool) {
self.must_recreate_target = recreate;
}
fn create(h: HWND, f: *mut ID2D1Factory, r: *mut ID2D1HwndRenderTarget) -> Canvas<ID> {
Canvas::<ID>{
handle: h,
factory: f,
render_target: r,
must_recreate_target: false,
resources: HashMap::with_capacity(10),
p: PhantomData
}
}
fn rebuild(&mut self) -> Result<(), SystemError> {
let result = unsafe{ build_render_target(self.handle, &mut *self.factory) };
match result {
Ok(render_target) => {
self.render_target = render_target;
self.must_recreate_target = false;
Ok(())
}
Err(e) => Err(e)
}
}
fn get_resource(&mut self, id: &ID) -> Result<CanvasResources, Error> {
let id = Canvas::hash_id(id);
if let Some(r) = self.resources.get(&id) {
Ok( r.clone() )
} else {
Err(Error::KeyNotFound)
}
}
}