Only allow for types that contain the Tween trait

src/lib.rs

@@ -330,19 +330,53 @@ fn tline_set_by_timestamp() {
 }
 
 #[test]
-fn tline_new_sequence() {
+fn tline_new_integer_sequences() {
     let mut timeline = Timeline::new(Framerate::Fixed(24.0));
 
-    let mut sequence_one: &mut Sequence<i64> = timeline.new_sequence().unwrap();
+    let mut sequence_one: &mut Sequence<f64> = timeline.new_sequence().unwrap();
 
     assert!(sequence_one
-        .add_keyframe_at_timestamp(Keyframe { value: 3 }, &tcode_hmsf!(00:00:05:00))
+        .add_keyframe_at_timestamp(Keyframe { value: 3.0 }, &tcode_hmsf!(00:00:05:00))
         .is_some());
 
-    let mut sequence_two: &mut Sequence<i32> = timeline.new_sequence().unwrap();
+    let mut sequence_two: &mut Sequence<f32> = timeline.new_sequence().unwrap();
 
     assert!(sequence_two
-        .add_keyframe_at_timestamp(Keyframe { value: 6 }, &tcode_hmsf!(00:00:10:00))
+        .add_keyframe_at_timestamp(Keyframe { value: 6.0 }, &tcode_hmsf!(00:00:10:00))
+        .is_some());
+}
+
+#[test]
+fn tline_new_kurbo_sequences() {
+    use kurbo::Vec2;
+
+    let mut timeline = Timeline::new(Framerate::Fixed(24.0));
+
+    let mut sequence: &mut Sequence<Vec2> = timeline.new_sequence().unwrap();
+
+    sequence.add_keyframes_at_timestamp(vec![
+        (
+            Keyframe {
+                value: Vec2::new(0.0, 1.0),
+            },
+            &tcode_hmsf!(00:00:01:00),
+        ),
+        (
+            Keyframe {
+                value: Vec2::new(1.0, 1.0),
+            },
+            &tcode_hmsf!(00:00:02:00),
+        ),
+        (
+            Keyframe {
+                value: Vec2::new(1.0, 2.0),
+            },
+            &tcode_hmsf!(00:00:03:00),
+        ),
+    ]);
+
+    assert!(sequence
+        .get_keyframe_at_timestamp(&tcode_hmsf!(00:00:02:00))
         .is_some());
 }
 

src/timeline.rs

@@ -368,7 +368,7 @@ impl Timeline {
         }
     }
 
-    pub fn new_sequence<T: 'static>(&mut self) -> Option<&mut Sequence<T>> {
+    pub fn new_sequence<T: Tween + 'static>(&mut self) -> Option<&mut Sequence<T>> {
         if self.sequences.get::<Vec<Sequence<T>>>().is_none() {
             self.sequences.insert(Vec::<Sequence<T>>::new());
         }
@@ -409,17 +409,17 @@ impl Timeline {
 }
 
 #[derive(Debug)]
-pub struct Sequence<T> {
+pub struct Sequence<T: Tween> {
     tree: BTreeMap<isize, HourLeaf<T>>,
 }
 
-impl<T> Default for Sequence<T> {
+impl<T: Tween> Default for Sequence<T> {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl<T> Sequence<T> {
+impl<T: Tween> Sequence<T> {
     pub fn new() -> Self {
         Self {
             tree: BTreeMap::new(),
@@ -474,6 +474,8 @@ impl<T> Sequence<T> {
         key: Keyframe<T>,
         time: &Timecode,
     ) -> Option<&mut Keyframe<T>> {
+        // TODO: Make it so it returns 'None' instead of panicking.
+
         let hour: &mut HourLeaf<T> = self.get_or_create_hour_with_timestamp(time).unwrap();
         let minute: &mut MinuteLeaf<T> = hour.get_or_create_minute_with_timestamp(time).unwrap();
         let second: &mut SecondLeaf<T> = minute.get_or_create_second_with_timestamp(time).unwrap();
@@ -482,6 +484,20 @@ impl<T> Sequence<T> {
         frame.add_keyframe_at_timestamp(time, key)
     }
 
+    /// # Panics
+    ///
+    /// TODO!
+    pub fn get_keyframe_at_timestamp(&mut self, time: &Timecode) -> Option<&mut Keyframe<T>> {
+        // TODO: Make it so it returns 'None' instead of panicking.
+
+        let hour: &mut HourLeaf<T> = self.get_hour_with_timestamp(time).unwrap();
+        let minute: &mut MinuteLeaf<T> = hour.get_minute_with_timestamp(time).unwrap();
+        let second: &mut SecondLeaf<T> = minute.get_second_with_timestamp(time).unwrap();
+        let frame: &mut FrameLeaf<T> = second.get_frame_with_timestamp(time).unwrap();
+
+        frame.get_keyframe_at_timestamp(time)
+    }
+
     /// # Panics
     ///
     /// TODO!
@@ -493,17 +509,17 @@ impl<T> Sequence<T> {
 }
 
 #[derive(Debug)]
-pub struct HourLeaf<T> {
+pub struct HourLeaf<T: Tween> {
     minutes: BTreeMap<isize, MinuteLeaf<T>>,
 }
 
-impl<T> Default for HourLeaf<T> {
+impl<T: Tween> Default for HourLeaf<T> {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl<T> HourLeaf<T> {
+impl<T: Tween> HourLeaf<T> {
     pub fn new() -> Self {
         Self {
             minutes: BTreeMap::new(),
@@ -555,17 +571,17 @@ impl<T> HourLeaf<T> {
 }
 
 #[derive(Debug)]
-pub struct MinuteLeaf<T> {
+pub struct MinuteLeaf<T: Tween> {
     seconds: BTreeMap<isize, SecondLeaf<T>>,
 }
 
-impl<T> Default for MinuteLeaf<T> {
+impl<T: Tween> Default for MinuteLeaf<T> {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl<T> MinuteLeaf<T> {
+impl<T: Tween> MinuteLeaf<T> {
     pub fn new() -> Self {
         Self {
             seconds: BTreeMap::new(),
@@ -617,17 +633,17 @@ impl<T> MinuteLeaf<T> {
 }
 
 #[derive(Debug)]
-pub struct SecondLeaf<T> {
+pub struct SecondLeaf<T: Tween> {
     frames: BTreeMap<isize, FrameLeaf<T>>,
 }
 
-impl<T> Default for SecondLeaf<T> {
+impl<T: Tween> Default for SecondLeaf<T> {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl<T> SecondLeaf<T> {
+impl<T: Tween> SecondLeaf<T> {
     pub fn new() -> Self {
         Self {
             frames: BTreeMap::new(),
@@ -676,17 +692,17 @@ impl<T> SecondLeaf<T> {
 }
 
 #[derive(Debug)]
-pub struct FrameLeaf<T> {
+pub struct FrameLeaf<T: Tween> {
     nanos: BTreeMap<isize, Keyframe<T>>,
 }
 
-impl<T> Default for FrameLeaf<T> {
+impl<T: Tween> Default for FrameLeaf<T> {
     fn default() -> Self {
         Self::new()
     }
 }
 
-impl<T> FrameLeaf<T> {
+impl<T: Tween> FrameLeaf<T> {
     pub fn new() -> Self {
         Self {
             nanos: BTreeMap::new(),
@@ -724,6 +740,6 @@ impl<T> FrameLeaf<T> {
 }
 
 #[derive(Debug, Default)]
-pub struct Keyframe<T> {
+pub struct Keyframe<T: Tween> {
     pub value: T,
 }

src/value.rs

@@ -178,6 +178,13 @@ impl Tween for f64 {
     }
 }
 
+impl Tween for f32 {
+    fn tween(&self, other: &Self, t: f64, _easing: &Easing) -> Self {
+        // Same TODO as f64
+        keyframe::ease(keyframe::functions::Linear, *self, *other, t)
+    }
+}
+
 impl Tween for kurbo::Point {
     fn tween(&self, other: &Self, t: f64, easing: &Easing) -> Self {
         Self::new(