flo_animation 0.1.0

Describes a FlowBetween animation
Documentation 
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

use super::super::traits::*;
use super::vector_keyframe::*;

use canvas::*;

use std::sync::*;
use std::time::Duration;

///
/// Represents a ready-to-render vector frame
/// 
pub struct VectorFrame {
    /// The keyframe that will be rendered
    keyframe: Arc<VectorKeyFrame>,

    /// The offset into the frame that this should render
    offset: Duration,
}

impl VectorFrame {
    ///
    /// Creates a new vector keyframe
    /// 
    pub fn new(keyframe: Arc<VectorKeyFrame>, offset: Duration) -> VectorFrame {
        VectorFrame {
            keyframe:   keyframe,
            offset:     offset
        }
    }
}

impl Frame for VectorFrame {
    fn time_index(&self) -> Duration {
        self.keyframe.start_time() + self.offset
    }

    fn render_to(&self, gc: &mut GraphicsPrimitives) {
        let offset          = self.offset;
        let mut properties  = VectorProperties::default();

        self.keyframe.elements().iter().for_each(move |&(appearance_time, ref element)| {
            // Properties always update regardless of the time they're at (so the display is consistent)
            element.update_properties(&mut properties);

            if appearance_time <= offset {
                element.render(gc, &properties);
            }
        })
    }

    fn vector_elements<'a>(&'a self) -> Option<Box<'a+Iterator<Item=Vector>>> {
        let offset              = self.offset;
        let elements: Vec<_>    = self.keyframe.elements().iter()
            .filter(move |&&(appearance_time, _)| appearance_time <= offset)
            .map(|&(_, ref element)| element.clone())
            .collect();

        Some(Box::new(elements.into_iter()))
    }

    fn active_brush(&self) -> Option<(BrushDefinition, BrushDrawingStyle)> {
        let mut properties  = VectorProperties::default();

        self.keyframe.elements().iter()
            .for_each(|&(_appearance_time, ref element)| {
                element.update_properties(&mut properties);
            });

        Some(properties.brush.to_definition())
    }

    fn active_brush_properties(&self) -> Option<BrushProperties> {
        let mut properties  = VectorProperties::default();

        self.keyframe.elements().iter()
            .for_each(|&(_appearance_time, ref element)| {
                element.update_properties(&mut properties);
            });

        Some(properties.brush_properties)
    }
}