From eff2e4cc49bfadd9716f3ad65854b3b0ca309b74 Mon Sep 17 00:00:00 2001
From: Joel Klinghed <the_jk@yahoo.com>
Date: Tue, 26 Sep 2017 23:44:35 +0200
Subject: Animate job count changes

---
 src/animator.hh | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/animator.hh

(limited to 'src/animator.hh')

diff --git a/src/animator.hh b/src/animator.hh
new file mode 100644
index 0000000..c8072ac
--- /dev/null
+++ b/src/animator.hh
@@ -0,0 +1,60 @@
+#ifndef ANIMATOR_HH
+#define ANIMATOR_HH
+
+#include <memory>
+
+class Animation;
+class Looper;
+
+class Animator {
+public:
+  class Observer {
+  public:
+    virtual ~Observer() {}
+
+    // Called after all active animations callbacks has been called.
+    // Not called if there are no active animations.
+    virtual void tick(Animator* animator) = 0;
+
+  protected:
+    Observer() {}
+  };
+
+  class AnimationObserver {
+  public:
+    virtual ~AnimationObserver() {}
+
+    // Called after the animation has been updated with the new value
+    virtual void ticked(Animator* animator, Animation* animation,
+                        double value) = 0;
+    // Called after the animation stopped, either because stop() was called
+    // or because animation->tick() return false.
+    // If animation->tick() returned false ticked method above is always called
+    // first
+    virtual void stopped(Animator* animator, Animation* animation) = 0;
+
+  protected:
+    AnimationObserver() {}
+  };
+
+  virtual ~Animator() {}
+
+  static Animator* create(std::shared_ptr<Looper> const& looper);
+
+  virtual void start(std::shared_ptr<Animation> const& animation,
+                     AnimationObserver* observer) = 0;
+  virtual bool observe(Animation* animation, AnimationObserver* observer) = 0;
+  virtual bool stop(Animation* animation) = 0;
+  virtual bool active(Animation* animation) const = 0;
+  virtual bool active() const = 0;
+
+  virtual void add_observer(Observer* observer) = 0;
+  virtual void remove_observer(Observer* observer) = 0;
+
+protected:
+  Animator() {}
+  Animator(Animator const&) = delete;
+  Animator& operator=(Animator const&) = delete;
+};
+
+#endif  // ANIMATOR_HH
-- 
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