def __init__(self, icon_file_func, *args, **kwargs):
super(_PreviewWidget, self).__init__(*args, **kwargs)
self.board_drawer = \
BoardDrawer(get_size_func=self._get_drawer_size,
invalidate_rect_func=self._invalidate_drawer_rect)
self.removal_drawer = \
RemovalDrawer(get_size_func=self._get_drawer_size,
invalidate_rect_func=self._invalidate_drawer_rect)
self.win_drawer = \
WinDrawer(get_size_func=self._get_drawer_size,
invalidate_rect_func=self._invalidate_drawer_rect)
self._icon_file_func = icon_file_func
self._preview_rect = Gdk.Rectangle()
self._preview_rect.x = self._preview_rect.y = \
self._preview_rect.width = self._preview_rect.height = 0
self._toolbar_rect = Gdk.Rectangle()
self._toolbar_rect.x = self._toolbar_rect.y = \
self._toolbar_rect.width = self._toolbar_rect.height = 0
self._drawer_rect = Gdk.Rectangle()
self._drawer_rect.x = self._drawer_rect.y = \
self._drawer_rect.width = self._drawer_rect.height = 0
self._drawer = self.board_drawer
# Mouse position as a floating point value over the 4x3 unit preview
# area.
self._cursor_pos = (0.0, 0.0)
# Cursor size in pixels.
self._cursor_size = (0, 0)
self._click_visible = False
self._cursor_visible = False
self.connect('draw', self._draw_event_cb)
self.connect('configure-event', self._configure_event_cb)
