docs: Polish Efl.Canvas.Animation_*

Summary:
These docs were lacking a lot of detail.

Depends on D10562

Reviewers: bu5hm4n, cedric, zmike, Jaehyun_Cho

Reviewed By: cedric

Subscribers: #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D10565

src/lib/evas/canvas/efl_canvas_animation_alpha.eo

@@ -1,18 +1,25 @@
 class @beta Efl.Canvas.Animation_Alpha extends Efl.Canvas.Animation
 {
-   [[Efl alpha animation class]]
+   [[Animated alpha blending effect.
+
+     The @Efl.Canvas.Object will have its alpha (transparency) value multiplied by
+     this animation.
+     This can be used to create fade-in and fade-out transitions, for example.
+   ]]
    c_prefix: efl_animation_alpha;
    data: Efl_Canvas_Animation_Alpha_Data;
    methods {
       @property alpha {
-         [[Alpha property]]
+         [[Alpha range to animate. $[0.0] means the object is transparent and $[1.0] means
+           the object is opaque.
+         ]]
          set {
          }
          get {
          }
          values {
-            from_alpha: double; [[Alpha value when animation starts]]
+            from_alpha: double; [[Initial alpha value.]]
-            to_alpha: double; [[Alpha value when animation ends]]
+            to_alpha: double; [[Ending alpha value.]]
          }
       }
    }

src/lib/evas/canvas/efl_canvas_animation_rotate.eo

@@ -1,33 +1,51 @@
 class @beta Efl.Canvas.Animation_Rotate extends Efl.Canvas.Animation
 {
-   [[Efl rotate animation class]]
+   [[Animated rotation effect.
+
+     The @Efl.Canvas.Object will rotate around a pivot point from one degree to another.
+     Coordinates for the pivot point can be relative to another object or absolute
+     (relative to the containing canvas).
+
+     Note: Changing an object's position using @Efl.Gfx.Entity.position while this
+     animation is running might lead to unexpected results.
+   ]]
    c_prefix: efl_animation_rotate;
    data: Efl_Canvas_Animation_Rotate_Data;
    methods {
       @property rotate {
-         [[Rotate property]]
+         [[Degree range to animate and pivot object.
+           The object will rotate from $from_degree to $to_degree around the pivot point.
+           All of the object's vertices (i.e. the corners, if it's a rectangular object)
+           will be rotated by these degrees, relative to the pivot point inside the pivot object.
+           The pivot point is another object $pivot plus an additional offset $center_point.
+         ]]
          set {
          }
          get {
          }
          values {
-            from_degree: double; [[Rotation degree when animation starts]]
+            from_degree: double; [[Initial rotation (from 0 to 360). 0 means no rotation.]]
-            to_degree: double; [[Rotation degree when animation ends]]
+            to_degree: double; [[Ending rotation (from 0 to 360). 0 means no rotation.]]
-            pivot: Efl.Canvas.Object; [[Pivot object for the center point.
+            pivot: Efl.Canvas.Object; [[Object to use as pivot. $NULL means the animated object itself.]]
-                                        If the pivot object is $NULL, then the object is rotated on itself.]]
+            center_point: Eina.Vector2; [[Position in pixels of the pivot point inside the pivot object.
-            center_point : Eina.Vector2; [[Relative coordinate of the center point.]]
+                                         $[(0,0)] means the upper-left corner.]]
          }
       }
       @property rotate_absolute {
-         [[Rotate absolute property]]
+         [[Degree range to animate and absolute pivot point.
+           The object will rotate from $from_degree to $to_degree around the pivot point.
+           All of the object's vertices (i.e. the corners, if it's a rectangular object)
+           will be rotated by these degrees, relative to an absolute pivot point.
+           The pivot point is relative to the canvas.
+         ]]
          set {
          }
          get {
          }
          values {
-            from_degree: double; [[Rotation degree when animation starts]]
+            from_degree: double; [[Initial rotation (from 0 to 360). 0 means no rotation.]]
-            to_degree: double; [[Rotation degree when animation ends]]
+            to_degree: double; [[Ending rotation (from 0 to 360). 0 means no rotation.]]
-            center_pointer : Eina.Position2D; [[absolute coordinate of the center point.]]
+            pivot_point : Eina.Position2D; [[Position of the pivot point relative to the canvas.]]
          }
       }
    }

src/lib/evas/canvas/efl_canvas_animation_scale.eo

@@ -1,33 +1,52 @@
 class @beta Efl.Canvas.Animation_Scale extends Efl.Canvas.Animation
 {
-   [[Efl scale animation class]]
+   [[Animated scaling effect.
+
+     The @Efl.Canvas.Object will have its size and position changed due to a scaling
+     operation around a specified pivot point.
+     Coordinates for the pivot point can be relative to the object or absolute
+     (relative to the containing canvas).
+
+     Note: Changing an object's geometry using @Efl.Gfx.Entity.position or @Efl.Gfx.Entity.size
+     while this animation is running might lead to unexpected results.
+   ]]
    c_prefix: efl_animation_scale;
    data: Efl_Canvas_Animation_Scale_Data;
    methods {
       @property scale {
-         [[Scale property]]
+         [[Scale range and pivot object.
+           The object's scale will change from $from_scale to $to_scale.
+           All of the object's vertices (i.e. the corners, if it's a rectangular object)
+           will be multiplied by this scale, relative to the pivot point inside the pivot object.
+           The pivot point is another object $pivot plus an additional offset $center_point.
+         ]]
          set {
          }
          get {
          }
          values {
-            from_scale : Eina.Vector2; [[Scale factor  when animation starts]]
+            from_scale: Eina.Vector2; [[Initial scale value.]]
-            to_scale : Eina.Vector2; [[Scale factor when animation ends]]
+            to_scale: Eina.Vector2; [[Ending scale value.]]
-            pivot: Efl.Canvas.Object; [[Pivot object for the center point. If the pivot object is $NULL, then the object
+            pivot: Efl.Canvas.Object; [[Object to use as pivot. $NULL means the animated object itself.]]
-                                        is scaled on itself.]]
+            center_point: Eina.Vector2; [[Position in pixels of the pivot point inside the pivot object.
-            pivot_pos : Eina.Vector2; [[Relative coordinates of the center point. 0.0,0.0 is upper left.]]
+                                          $[(0,0)] means the upper-left corner.]]
          }
       }
       @property scale_absolute {
-         [[Scale absolute property]]
+         [[Scale range and pivot position, relative to the canvas.
+           The object's scale will change from $from_scale to $to_scale.
+           All of the object's vertices (i.e. the corners, if it's a rectangular object)
+           will be multiplied by this scale, relative to the pivot point.
+           The pivot point is relative to the canvas.
+         ]]
          set {
          }
          get {
          }
          values {
-            from_scale : Eina.Vector2; [[Scale factor  when animation starts]]
+            from_scale: Eina.Vector2; [[Initial scale value.]]
-            to_scale : Eina.Vector2; [[Scale factor when animation ends]]
+            to_scale: Eina.Vector2; [[Ending scale value.]]
-            pos : Eina.Position2D; [[Absolut coordinates in canvas space]]
+            pivot_point: Eina.Position2D; [[Position of the pivot point relative to the canvas.]]
          }
       }
    }

src/lib/evas/canvas/efl_canvas_animation_translate.eo

@@ -1,29 +1,43 @@
 class @beta Efl.Canvas.Animation_Translate extends Efl.Canvas.Animation
 {
-   [[Efl translate animation class]]
+   [[Animated translation effect.
+
+     The @Efl.Canvas.Object will move from one point to another.
+     Coordinates for the origin and destination points can be relative to the object
+     or absolute (relative to the containing canvas).
+
+     Note: Changing an object's position using @Efl.Gfx.Entity.position while this
+     animation is running might lead to unexpected results.
+   ]]
    c_prefix: efl_animation_translate;
    data: Efl_Canvas_Animation_Translate_Data;
    methods {
       @property translate {
-         [[Translate property]]
+         [[Translation vector, relative to the starting position of the object.
+           So, for example, if $from is $[(0,0)], the object will move from its
+           current position to $to.
+         ]]
          set {
          }
          get {
          }
          values {
-            from : Eina.Position2D; [[Position moved when animation starts.]]
+            from : Eina.Position2D; [[Relative initial position.]]
-            to : Eina.Position2D; [[Position moved when animation ends.]]
+            to : Eina.Position2D; [[Relative ending position.]]
          }
       }
       @property translate_absolute {
-         [[Translate absolute property]]
+         [[Translation vector, relative to the canvas.
+           So, for example, if $from is $[(0,0)], the object will always start from the
+           origin of the canvas, regardless of the current object position.
+         ]]
          set {
          }
          get {
          }
          values {
-            from : Eina.Position2D; [[The position where the animation starts.]]
+            from : Eina.Position2D; [[Absolute initial position.]]
-            to : Eina.Position2D; [[The position where the animation stops.]]
+            to : Eina.Position2D; [[Absolute ending position.]]
          }
       }
    }