multitouch/src/widgets.py

from widget import Widget
from screen import screen_size


class RectangularWidget(Widget):
    """
    Rectangular widget, has a position and a size.
    """
    def __init__(self, x, y, width, height):
        super(RectangularWidget, self).__init__(x, y)
        self.set_size(width, height)

    def __str__(self):
        return '<%s at (%s, %s) size=(%s, %s)>' \
               % (self.__class__.__name__, self.x, self.y, self.width,
                  self.height)

    def set_size(self, width, height):
        self.width = width
        self.height = height

    def get_size(self):
        return self.width, self.height

    def contains_event(self, event):
        x, y = event.get_position()
        return self.x <= x <= self.x + self.width \
               and self.y <= y <= self.y + self.height


class CircularWidget(Widget):
    """
    Circular widget, has a position and a radius.
    """
    def __init__(self, x, y, radius):
        super(CircularWidget, self).__init__(x, y)
        self.set_radius(radius)

    def __str__(self):
        return '<%s at (%s, %s) size=(%s, %s)>' \
               % (self.__class__.__name__, self.x, self.y, self.width,
                  self.height)

    def set_radius(self, radius):
        self.radius = radius

    def get_radius(self):
        return self.radius

    def contains_event(self, event):
        return self.distance_to(event.get_touch_object()) <= self.radius


class FullscreenWidget(RectangularWidget):
    """
    Widget representation for the entire screen. This class provides an easy
    way to create a single rectangular widget that catches all gestures.
    """
    def __init__(self):
        super(FullscreenWidget, self).__init__(0, 0, *screen_size)

    def __str__(self):
        return '<FullscreenWidget size=(%d, %d)>' % self.get_size()

    def contains_event(self, event):
        return True