from tuikit.core.widget import Widget

class Container(Widget):

    """Container widget.

    Can contain other widgets to create hierarchical structure.

    """

        Widget.__init__(self)

        #: List of child widgets.

        self.children = []

    def add(self, widget):

        """Add widget into container."""

        self.children.append(widget)

        widget.parent = self

        widget.window = self.window

        widget.set_theme(self.theme)

    def draw(self, buffer, x=0, y=0):

        """Draw child widgets."""

        for child in self.children:

            cx = x + child.x

            cy = y + child.y

            with buffer.clip(cx, cy, child.width, child.height):

                child.draw(buffer, cx, cy)

    def set_theme(self, theme):

        Widget.set_theme(self, theme)

        for child in self.children:

            child.set_theme(theme)