Implement the transition between zoom view.

1 files changed, 66 insertions, 0 deletions

diff --git a/shell/view/home/transitionbox.py b/shell/view/home/transitionbox.py
new file mode 100644
index 0000000..61d94c9
--- /dev/null
+++ b/shell/view/home/transitionbox.py
@@ -0,0 +1,66 @@
+# Copyright (C) 2007, Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import hippo
+import gobject
+
+from sugar.graphics import units
+from sugar.graphics import animator
+from sugar.graphics.spreadbox import SpreadBox
+
+from view.home.MyIcon import MyIcon
+
+class _Animation(animator.Animation):
+    def __init__(self, icon, start_scale, end_scale):
+        animator.Animation.__init__(self, 0.0, 1.0)
+
+        self._icon = icon
+        self.start_scale = start_scale
+        self.end_scale = end_scale
+
+    def next_frame(self, current):
+        d = (self.end_scale - self.start_scale) * current
+        self._icon.props.scale = self.start_scale + d
+
+class TransitionBox(SpreadBox):
+    __gtype_name__ = 'SugarTransitionBox'
+    
+    __gsignals__ = {
+        'completed': (gobject.SIGNAL_RUN_FIRST,
+                      gobject.TYPE_NONE, ([]))
+    }
+    
+    def __init__(self):
+        SpreadBox.__init__(self, background_color=0xe2e2e2ff)
+
+        self._scale = 0.0
+
+        self._my_icon = MyIcon(units.LARGE_ICON_SCALE)
+        self.set_center_item(self._my_icon)
+
+        self._animator = animator.Animator(0.5, 30)
+        self._animator.connect('completed', self._animation_completed_cb)
+
+    def _animation_completed_cb(self, anim):
+        self.emit('completed')
+
+    def set_scale(self, scale):
+        self._animator.remove_all()
+        self._animator.add(_Animation(self._my_icon, self._scale, scale))
+        self._animator.start()
+        
+        self._scale = scale
+