Refactor directory structure a bit, preliminary to the

library split-out.

src/view/home/transitionbox.py

@@ -0,0 +1,93 @@
+# 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 style
+from sugar.graphics import animator
+
+from view.home.MyIcon import MyIcon
+from view.home.spreadlayout import SpreadLayout
+
+class _Animation(animator.Animation):
+    def __init__(self, icon, start_size, end_size):
+        animator.Animation.__init__(self, 0.0, 1.0)
+
+        self._icon = icon
+        self.start_size = start_size
+        self.end_size = end_size
+
+    def next_frame(self, current):
+        d = (self.end_size - self.start_size) * current
+        self._icon.props.size = self.start_size + d
+
+class _Layout(gobject.GObject,hippo.CanvasLayout):
+    __gtype_name__ = 'SugarTransitionBoxLayout'
+    def __init__(self):
+        gobject.GObject.__init__(self)
+
+    def do_set_box(self, box):
+        self._box = box
+
+    def do_get_height_request(self, for_width):
+        return 0, 0
+
+    def do_get_width_request(self):
+        return 0, 0
+
+    def do_allocate(self, x, y, width, height,
+                    req_width, req_height, origin_changed):
+        for child in self._box.get_layout_children():
+            min_width, child_width = child.get_width_request()
+            min_height, child_height = child.get_height_request(child_width)
+
+            child.allocate(x + (width - child_width) / 2,
+                           y + (height - child_height) / 2,
+                           child_width, child_height, origin_changed)
+
+class TransitionBox(hippo.CanvasBox):
+    __gtype_name__ = 'SugarTransitionBox'
+    
+    __gsignals__ = {
+        'completed': (gobject.SIGNAL_RUN_FIRST,
+                      gobject.TYPE_NONE, ([]))
+    }
+    
+    def __init__(self):
+        hippo.CanvasBox.__init__(self, background_color=0xe2e2e2ff)
+
+        self._size = style.XLARGE_ICON_SIZE
+
+        self._layout = _Layout()
+        self.set_layout(self._layout)
+
+        self._my_icon = MyIcon(self._size)
+        self.append(self._my_icon)
+
+        self._animator = animator.Animator(0.3)
+        self._animator.connect('completed', self._animation_completed_cb)
+
+    def _animation_completed_cb(self, anim):
+        self.emit('completed')
+
+    def set_size(self, size):
+        self._animator.remove_all()
+        self._animator.add(_Animation(self._my_icon, self._size, size))
+        self._animator.start()
+        
+        self._size = size
+