#---------------------------------------------------------------------------
#
#   PyGUI - Column layout component - Generic
#
#---------------------------------------------------------------------------

from LayoutUtils import equalize_components
from GUI import Frame, export

class Column(Frame):

    def __init__(self, items, spacing = 10, align = 'l', equalize = '',
            expand = None, padding = (0, 0), **kwds):
        Frame.__init__(self)
        hpad, vpad = padding
        if expand is not None and not isinstance(expand, int):
            expand = items.index(expand)
        equalize_components(items, equalize)
        width = 0
        for item in items:
            if item:
                width = max(width, item.width)
        y = vpad
        gap = 0
        vanchor = 't'
        hanchor = align
        for i, item in enumerate(items):
            if item:
                y += gap
                if 'l' in align:
                    x = 0
                    if 'r' in align:
                        item.width = width
                elif align == 'r':
                    x = width - item.width
                else:
                    x = (width - item.width) // 2
                item.position = (x + hpad, y)
                if i == expand:
                    item.anchor = 'tb' + hanchor
                    vanchor = 'b'
                else:
                    item.anchor = vanchor + hanchor
                y += item.height
            if i == expand:
                vanchor = 'b'
            gap = spacing
        self.size = (width + 2 * hpad, y + vpad)
        self.add(items)
        self.set(**kwds)

export(Column)