[pyclutter] examples: Add basic actor example code

[Emmanuele Bassi <ebassi src gnome org>]

commit 9912fe2766295c74901bbb63df0cc9ead6e90b18
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Apr 12 16:43:48 2015 +0100

    examples: Add basic actor example code
    
    Ported straight from the C equivalent.

 examples/Makefile.am    |    3 +-
 examples/basic-actor.py |  105 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+), 1 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 1b336ac..c07f55d 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1 +1,2 @@
-EXTRA_DIST =
+EXTRA_DIST = \
+       basic-actor.py
diff --git a/examples/basic-actor.py b/examples/basic-actor.py
new file mode 100644
index 0000000..0caca93
--- /dev/null
+++ b/examples/basic-actor.py
@@ -0,0 +1,105 @@
+import sys
+
+from gi.repository import Clutter
+
+class ToggleActor(Clutter.Actor):
+    def __init__(self):
+        Clutter.Actor.__init__(self)
+        self._toggled = False
+
+    @property
+    def toggled(self):
+        return self._toggled
+
+    def toggle(self):
+        if self._toggled:
+            self._toggled = False
+        else:
+            self._toggled = True
+
+def animate_color(actor, event):
+    actor.toggle()
+
+    end_color = None
+    if actor.toggled:
+        end_color = Clutter.Color.get_static(Clutter.StaticColor.BLUE)
+    else:
+        end_color = Clutter.Color.get_static(Clutter.StaticColor.RED)
+
+    with actor.easing_state(500, Clutter.AnimationMode.LINEAR):
+        actor.props.background_color = end_color
+
+    return True
+
+def on_transition_stopped(actor, transition_name, is_finished):
+    if transition_name == 'rotation-angle-y':
+        with actor.easing_state():
+            actor.set_rotation_angle(Clutter.RotateAxis.Y_AXIS, 0)
+
+def animate_rotation(actor, event):
+    with actor.easing_state(1000):
+        actor.set_rotation_angle(Clutter.RotateAxis.Y_AXIS, 360.0)
+
+    return True
+
+def on_crossing(actor, event):
+    z_pos = 0
+    if event.type == Clutter.EventType.ENTER:
+        z_pos = -250
+
+    with actor.easing_state(500, Clutter.AnimationMode.EASE_OUT_BOUNCE):
+        actor.set_z_position(z_pos)
+
+    return True
+
+if __name__ == '__main__':
+    stage = Clutter.Stage(title="Three Flowers in a Vase")
+    stage.props.user_resizable = True
+    stage.connect('destroy', Clutter.main_quit)
+
+    vase = Clutter.Actor(name='vase')
+    vase.props.layout_manager = Clutter.BoxLayout()
+    vase.props.background_color = Clutter.Color.get_static(Clutter.StaticColor.SKY_BLUE_LIGHT)
+    vase.add_constraint(Clutter.AlignConstraint(source=stage, align_axis=Clutter.AlignAxis.BOTH, factor=0.5))
+    stage.add_child(vase)
+
+    flowers = []
+
+    flower = ToggleActor()
+    flower.set_name('flower.1')
+    flower.set_size(128, 128)
+    flower.set_margin_left(12)
+    flower.set_background_color(Clutter.Color.get_static(Clutter.StaticColor.RED))
+    flower.props.reactive = True
+    flower.connect('button-press-event', animate_color)
+    vase.add_child(flower)
+    flowers.append(flower)
+
+    flower = Clutter.Actor(name='flower.2')
+    flower.set_size(128, 128)
+    flower.set_margin_top(12)
+    flower.set_margin_bottom(12)
+    flower.set_margin_left(6)
+    flower.set_margin_right(6)
+    flower.set_background_color(Clutter.Color.get_static(Clutter.StaticColor.YELLOW))
+    flower.set_reactive(True)
+    flower.connect('enter-event', on_crossing)
+    flower.connect('leave-event', on_crossing)
+    vase.add_child(flower)
+    flowers.append(flower)
+
+    # The third one is green
+    flower = Clutter.Actor(name='flower.3')
+    flower.set_size(128, 128)
+    flower.set_margin_right(12)
+    flower.set_background_color(Clutter.Color.get_static(Clutter.StaticColor.GREEN))
+    flower.set_pivot_point(0.5, 0.0)
+    flower.props.reactive = True
+    flower.connect('button-press-event', animate_rotation)
+    flower.connect('transition-stopped', on_transition_stopped)
+    vase.add_child(flower)
+    flowers.append(flower)
+
+    stage.show()
+
+    Clutter.main()