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use crate::{Display, Entity, Event, PropGet, PropSet, Propagation, State, Units, Visibility, WindowEvent};
/// Determines the hovered entity based on the mouse cursor position
pub fn apply_hover(state: &mut State) {
let mut draw_tree: Vec<Entity> = state.tree.into_iter().collect();
// This should be cached somewhere probably
draw_tree.sort_by_cached_key(|entity| state.data.get_z_order(*entity));
let cursorx = state.mouse.cursorx;
let cursory = state.mouse.cursory;
let mut hovered_widget = Entity::root();
for entity in draw_tree.into_iter() {
// Skip invisible widgets
if state.data.get_visibility(entity) == Visibility::Invisible {
continue;
}
// This shouldn't be here but there's a bug if it isn't
if state.data.get_opacity(entity) == 0.0 {
continue;
}
// Skip non-displayed widgets
if entity.get_display(state) == Display::None {
continue;
}
// Skip non-hoverable widgets
if state.data.get_hoverable(entity) != true {
continue;
}
let border_width = match state
.style
.border_width
.get(entity)
.cloned()
.unwrap_or_default()
{
Units::Pixels(val) => val,
//Units::Percentage(val) => parent_width * val,
_ => 0.0,
};
let posx = state.data.get_posx(entity) - (border_width / 2.0);
let posy = state.data.get_posy(entity) - (border_width / 2.0);
let width = state.data.get_width(entity) + (border_width);
let height = state.data.get_height(entity) + (border_width);
//let clip_widget = state.data.get_clip_widget(entity);
let clip_region = state.data.get_clip_region(entity);
let mut transform = state.data.get_transform(entity);
//let scale = state.data.get_scale(entity);
//let mut scale_transform = Transform2D::identity();
//scale_transform.scale(scale, scale);
//scale_transform.inverse();
//transform.premultiply(&scale_transform);
//transform.translate(origin.0, origin.1);
transform.inverse();
//transform.translate(-origin.0, -origin.1);
let (cx, cy) = transform.transform_point(cursorx, cursory);
let (clip_x, clip_y) = transform.transform_point(clip_region.x, clip_region.y);
let (clip_w, clip_h) = transform.transform_point(clip_region.x + clip_region.w, clip_region.y + clip_region.h);
// let clip_posx = state.data.get_posx(clip_widget);
// let clip_posy = state.data.get_posy(clip_widget);
// let clip_width = state.data.get_width(clip_widget);
// let clip_height = state.data.get_height(clip_widget);
if cx >= posx
&& cx >= clip_x
&& cx < (posx + width)
&& cx < (clip_w)
&& cy >= posy
&& cy >= clip_y
&& cy < (posy + height)
&& cy < (clip_h)
{
hovered_widget = entity;
if entity.is_over(state) == false {
//println!("Over: {}", entity);
state.insert_event(
Event::new(WindowEvent::MouseOver)
.target(entity)
.propagate(Propagation::Direct),
);
entity.set_over(state, true);
}
} else {
if entity.is_over(state) == true {
state.insert_event(
Event::new(WindowEvent::MouseOut)
.target(entity)
.propagate(Propagation::Direct),
);
entity.set_over(state, false);
}
}
}
if hovered_widget != state.hovered {
// Useful for debugging
#[cfg(debug_assertions)]
println!(
"Hover changed to {:?} parent: {:?}, posx: {}, posy: {} width: {} height: {} z_order: {}",
hovered_widget,
state.tree.get_parent(hovered_widget),
state.data.get_posx(hovered_widget),
state.data.get_posy(hovered_widget),
state.data.get_width(hovered_widget),
state.data.get_height(hovered_widget),
state.data.get_z_order(hovered_widget),
);
hovered_widget.set_hover(state, true);
state.hovered.set_hover(state, false);
// if let Some(pseudo_classes) = state.style.pseudo_classes.get_mut(hovered_widget) {
// pseudo_classes.set_hover(true);
// }
// if let Some(pseudo_classes) = state.style.pseudo_classes.get_mut(state.hovered) {
// pseudo_classes.set_hover(false);
// }
// if state.captured != Entity::null() {
// state.insert_event(
// Event::new(WindowEvent::MouseOver)
// .target(state.captured)
// .propagate(Propagation::Direct),
// );
// } else if state.hovered != Entity::new(0, 0) {
// state.insert_event(
// Event::new(WindowEvent::MouseOver)
// .target(state.hovered),
// );
// }
state.insert_event(Event::new(WindowEvent::MouseEnter).target(hovered_widget));
state.insert_event(Event::new(WindowEvent::MouseLeave).target(state.hovered));
state.insert_event(Event::new(WindowEvent::Restyle).target(Entity::root()));
state.hovered = hovered_widget;
state.active = Entity::null();
//state.insert_event(Event::new(WindowEvent::Redraw).target(Entity::root()));
//state.needs_restyle = true;
// state.needs_redraw = true;
}
}