def create_grid(self):
"""
Setup the grid. After this function has has been called no modifications
to the grid are possible.
@todo: make it possible to change the layout during runtime
"""
# do some calculations
padding_x, padding_y = self.item_padding
if padding_x is None:
# no padding is given. Get the number fitting items
# and devide the remaining space as paddingand border
self.num_items_x = int(self.width / self.cell_size[0])
padding_x = self.width / self.num_items_x - self.cell_size[0]
self.item_width = self.cell_size[0] + padding_x
else:
self.item_width = self.cell_size[0] + padding_x
# now that we know the sizes check how much items fit
self.num_items_x = int(self.width / self.item_width)
if padding_y is None:
# no padding is given. Get the number fitting items
# and devide the remaining space as padding and border
self.num_items_y = int(self.height / self.cell_size[1])
padding_y = self.height / self.num_items_y - self.cell_size[1]
self.item_height = self.cell_size[1] + padding_y
else:
self.item_height = self.cell_size[1] + padding_y
# now that we know the sizes check how much items fit
self.num_items_y = int(self.height / self.item_height)
self.item_padding = padding_x, padding_y
# we now center the grid by default
x0 = (self.width - self.num_items_x * self.item_width + padding_x) / 2
y0 = (self.height - self.num_items_y * self.item_height +
padding_y) / 2
self.clip = (x0 - padding_x, y0 - padding_y), \
(self.num_items_x * self.item_width + padding_x, self.num_items_y * self.item_height + padding_y)
self.location = (0, 0)
# list of rendered items
self.item_widgets = {}
# group of items
self.item_group = AbstractGroup((x0, y0))
self.add(self.item_group)
self.create_grid = None
