1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

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;
    }
}