From e41e4adb89834a83564b35d0f044551aebaeb869 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A1ximo=20Cuadros?= <mcuadros@gmail.com>
Date: Fri, 10 Mar 2017 14:43:04 +0100
Subject: [PATCH] toolkit: PlayAnimation fuction

---
 toolkit.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/toolkit.go b/toolkit.go
index ede8938..d8639b8 100644
--- a/toolkit.go
+++ b/toolkit.go
@@ -43,6 +43,35 @@ func (tk *ToolKit) PlayImage(i image.Image, delay time.Duration) error {
 	return tk.Canvas.Render()
 }
 
+type Animation interface {
+	Next() (image.Image, time.Duration, error)
+}
+
+// PlayAnimation play the image during the delay returned by Next, until an err
+// is returned, if io.EOF is returned, PlayAnimation finish without an error
+func (tk *ToolKit) PlayAnimation(a Animation) error {
+	var err error
+	var i image.Image
+	var d time.Duration
+
+	for {
+		i, d, err = a.Next()
+		if err != nil {
+			break
+		}
+
+		if err := tk.PlayImage(i, d); err != nil {
+			return err
+		}
+	}
+
+	if err == io.EOF {
+		return nil
+	}
+
+	return err
+}
+
 // PlayImages draws a sequence of images during the given delays, the len of
 // images should be equal to the len of delay. If loop is true the function
 // loops over images until a true is sent to the returned chan