def align_rows_or_columns(self, container, padding, rows, column_or_row,
aligned_axis, aligned_axis_size, layout_axis,
layout_axis_size):
""" Align rows or columns elements with a column or row to the alignment of the parent container """
constraints = []
l_index = container.variables.alignment.domain.index("left")
c_index = container.variables.alignment.domain.index("center")
is_left = cb.eq(container.variables.alignment.id, str(l_index))
is_center = cb.eq(container.variables.alignment.id, str(c_index))
for row in rows:
for i in range(len(row) - 1):
shape1 = row[i]
shape2 = row[i + 1]
aligned_axis_size_value = str(shape1.computed_width(
)) if aligned_axis_size == "width" else str(
shape1.computed_height())
aligned_axis_size_value2 = str(shape2.computed_width(
)) if aligned_axis_size == "width" else str(
shape2.computed_height())
left_top_aligned = cb.eq(shape1.variables[aligned_axis].id,
shape2.variables[aligned_axis].id)
right_bottom_aligned = cb.eq(
cb.add(shape1.variables[aligned_axis].id,
aligned_axis_size_value),
cb.add(shape2.variables[aligned_axis].id,
aligned_axis_size_value2))
center_aligned = cb.eq(
cb.add(shape1.variables[aligned_axis].id,
cb.div(aligned_axis_size_value, "2")),
cb.add(shape2.variables[aligned_axis].id,
cb.div(aligned_axis_size_value2, "2")))
constraints.append(
cb.ite(
is_left, left_top_aligned,
cb.ite(is_center, center_aligned,
right_bottom_aligned)))
# Shape 2 is exactly to the right of shape 1 or to the bottom if in a column
layout_axis_size_value = str(shape1.computed_width(
)) if layout_axis_size == "width" else str(
shape1.computed_height())
constraints.append(
cb.eq(
cb.add(shape1.variables[layout_axis].id,
cb.add(layout_axis_size_value, padding)),
shape2.variables[layout_axis].id))
if len(constraints):
return cb.and_expr(constraints)
return True
def row_column_layout(self,
is_rows,
is_columns,
groups,
container,
spacing,
id_str=""):
""" Perform either row or column layout """
row_column_constraints = []
row_column_constraints.append(
cb.ite(
is_rows,
self.align_rows_or_columns(container, spacing, groups, "row",
"y", "height", "x", "width"),
"true"))
row_column_constraints.append(
cb.ite(
is_columns,
self.align_rows_or_columns(container, spacing, groups,
"column", "x", "width", "y",
"height"), "true"))
row_column_constraints.append(
cb.ite(
is_rows,
self.align_left_or_top(groups, spacing, "row", "x", "y",
"height"), "true"))
row_column_constraints.append(
cb.ite(
is_columns,
self.align_left_or_top(groups, spacing, "column", "y", "x",
"width"), "true"))
row_column_constraints.append(
cb.ite(
is_rows,
self.set_container_size_main_axis(container, spacing, groups,
"height"), "true"))
row_column_constraints.append(
cb.ite(
is_columns,
self.set_container_size_main_axis(container, spacing, groups,
"width"), "true"))
row_column_constraints.append(
cb.ite(
is_rows,
self.set_container_size_cross_axis(container, spacing, groups,
"width"), "true"))
row_column_constraints.append(
cb.ite(
is_columns,
self.set_container_size_cross_axis(container, spacing, groups,
"height"), "true"))
return row_column_constraints
def get_min_height_constraint(child_i, shortest_i, child_shapes): """ Get the height value of the smallest height element in a set of shapes (child_shapes) """ if child_i < len(child_shapes): shortest_child = child_shapes[shortest_i] shortest_child_height = str(shortest_child.computed_height()) next_child = child_shapes[child_i] next_child_height = str(next_child.computed_height()) return cb.ite(cb.lt(shortest_child_height, next_child_height), get_max_height_constraint(child_i+1, shortest_i, child_shapes), get_max_height_constraint(child_i+1, child_i, child_shapes)) else: child_shape_height = str(child_shapes[shortest_i].computed_height()) return child_shape_height
def get_max_height_constraint(child_i, tallest_i, child_shapes): """ Get the height value of the tallest element in a set of shapes (child_shapes) """ if child_i < len(child_shapes): tallest_child = child_shapes[tallest_i] tallest_child_height = str(tallest_child.computed_height()) next_child = child_shapes[child_i] next_child_height = str(next_child.computed_height()) return cb.ite(cb.gt(tallest_child_height, next_child_height), get_max_height_constraint(child_i+1, tallest_i, child_shapes), get_max_height_constraint(child_i+1, child_i, child_shapes)) else: child_shape_height = str(child_shapes[tallest_i].computed_height()) return child_shape_height
def get_max_width_constraint(child_i, widest_i, child_shapes): """ Get the width value of the widest element in a set of shapes (child_shapes) """ if child_i < len(child_shapes): widest_child = child_shapes[widest_i] widest_child_width = str(widest_child.computed_width()) next_child = child_shapes[child_i] next_child_width = str(next_child.computed_width()) return cb.ite(cb.gt(widest_child_width, next_child_width), get_max_width_constraint(child_i+1, widest_i, child_shapes), get_max_width_constraint(child_i+1, child_i, child_shapes)) else: child_shape_width = str(child_shapes[widest_i].computed_width()) return child_shape_width
def get_min_width_constraint(child_i, thinnest_i, child_shapes): """ Get the width value of the smallest width element in a set of shapes (child_shapes) """ if child_i < len(child_shapes): thinnest_child = child_shapes[thinnest_i] thinnest_child_width = str(thinnest_child.computed_width()) next_child = child_shapes[child_i] next_child_width = str(next_child.computed_width()) return cb.ite(cb.lt(thinnest_child_width, next_child_width), get_min_width_constraint(child_i+1, thinnest_i, child_shapes), get_max_width_constraint(child_i+1, child_i, child_shapes)) else: child_shape_width = str(child_shapes[thinnest_i].computed_width()) return child_shape_width
def get_tallest_column_constraint(self, column_i, tallest_i, columns,
spacing):
""" Constraint to compute the tallest column in a column arranged container,
which will be used to set the height on the parent container """
tallest_column = columns[tallest_i]
tallest_column_height = self.get_column_height(tallest_column, spacing)
if column_i < len(columns):
next_column = columns[column_i]
next_column_height = self.get_column_height(next_column, spacing)
return cb.ite(
cb.gt(tallest_column_height, next_column_height),
self.get_tallest_column_constraint(column_i + 1, tallest_i,
columns, spacing),
self.get_tallest_column_constraint(column_i + 1, column_i,
columns, spacing))
else:
return tallest_column_height
def get_widest_row_constraint(self, row_i, widest_i, rows, spacing):
""" Constraint to compute the widest row in a row arranged container,
which will be used to set the width on the parent container """
widest_row = rows[widest_i]
widest_row_width = self.get_row_width(widest_row, spacing)
if row_i < len(rows):
next_row = rows[row_i]
next_row_width = self.get_row_width(next_row, spacing)
return cb.ite(
cb.gt(widest_row_width, next_row_width),
self.get_widest_row_constraint(row_i + 1, widest_i, rows,
spacing),
self.get_widest_row_constraint(row_i + 1, row_i, rows,
spacing))
else:
return widest_row_width
def balanced_row_column_arrangement(self, is_rows, is_columns, container,
rows_index, columns_index, spacing):
# Columns/Rows arrangement constraints
# Only apply if there are > 2 children elements
arrangement = container.variables.arrangement
extra_in_first = container.variables.extra_in_first
if len(container.children) > 2:
num_children_even = len(container.children) % 2 == 0
if num_children_even:
groups = self.split_children_into_groups(container, True)
constraints = self.row_column_layout(is_rows, is_columns,
groups, container,
spacing)
self.constraints += cb.assert_expr(
cb.and_expr(constraints),
"container_" + container.shape_id + "_rows_columns")
else:
print("Rows and columns!!")
groups_one = self.split_children_into_groups(container, True)
const1 = self.row_column_layout(is_rows, is_columns,
groups_one, container, spacing,
"1")
groups_two = self.split_children_into_groups(container, False)
const2 = self.row_column_layout(is_rows, is_columns,
groups_two, container, spacing,
"2")
self.constraints += cb.assert_expr(
cb.ite(extra_in_first.id, cb.and_expr(const1),
cb.and_expr(const2)),
"container_" + container.shape_id + "_rows_columns")
else:
# Prevent columnns and rows variables if there are 2 children or less
self.constraints += cb.assert_expr(
cb.neq(arrangement.id, str(rows_index)),
"container_" + container.shape_id + "_arrangement_neq_rows")
self.constraints += cb.assert_expr(
cb.neq(arrangement.id, str(columns_index)),
"container_" + container.shape_id + "_arrangement_neq_columns")