tuikit/core/coords.py
author Radek Brich <radek.brich@devl.cz>
Fri, 28 Mar 2014 19:58:59 +0100
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child 104 742e504ec053
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Add TextField widget, keypress event, cursor.
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class Point:
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    """Point in cartesian space.
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    Implements attribute access (.x, .y) and list-like access([0],[1]).
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    """
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    def __init__(self, *args, **kwargs):
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        self.x = 0
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        self.y = 0
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        self.update(*args, **kwargs)
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    def __getitem__(self, key):
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        return (self.x, self.y)[key]
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    def __repr__(self):
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        return 'Point(x={0.x},y={0.y})'.format(self)
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    def move(self, relx, rely):
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        self.x += relx
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        self.y += rely
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    def moved(self, relx, rely):
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        return Point(self.x + relx, self.y + rely)
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    def update(self, *args, **kwargs):
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        """Update point.
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        Accepts positional or keyword arguments:
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        - (point: Point)
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        - (x: int, y: int)
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        """
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        if len(args) == 2:
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            self.x, self.y = args
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        elif len(args) == 1:
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            self.x, self.y = args[0]
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        elif len(args):
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            raise ValueError('Too many args.')
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        for key, val in kwargs.items():
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            if key == 'point':
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                self.x, self.y = val
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            elif key in ('x', 'y'):
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                setattr(self, key, val)
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            else:
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                raise ValueError('Bad keyword arg: %r' % key)
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class Size:
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    """Size class.
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    Implements attribute access (.w, .h) and list-like access([0],[1]).
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    """
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    def __init__(self, *args, **kwargs):
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        self.w = 0
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        self.h = 0
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        self.update(*args, **kwargs)
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    def __getitem__(self, key):
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        return (self.w, self.h)[key]
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    def __repr__(self):
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        return 'Size(w={0.w},h={0.h})'.format(self)
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    def update(self, *args, **kwargs):
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        """Update size.
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        Accepts positional or keyword arguments:
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        - (size: Size)
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        - (w: int, h: int)
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        """
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        if len(args) == 2:
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            self.w, self.h = args
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        elif len(args) == 1:
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            self.w, self.h = args[0]
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        elif len(args):
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            raise ValueError('Too many args.')
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        for key, val in kwargs.items():
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            if key == 'size':
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                self.w, self.h = val
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            elif key in ('w', 'h'):
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                setattr(self, key, val)
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            else:
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                raise ValueError('Bad keyword arg: %r' % key)
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    def readonly(self):
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        return ReadonlySize(self)
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class ReadonlySize:
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    """Wrapper for Size which makes it read-only."""
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    def __init__(self, size):
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        self._size = size
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    @property
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    def w(self):
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        return self._size.w
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    @property
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    def h(self):
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        return self._size.h
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    def __getitem__(self, key):
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        return self._size[key]
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    def __repr__(self):
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        return 'ReadonlySize(w={0.w},h={0.h})'.format(self._size)
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class Rect:
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    """Rectangle is defined by coordinates and size."""
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    def __init__(self, x=0, y=0, w=0, h=0):
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        self.x = x
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        self.y = y
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        self.w = w
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        self.h = h
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    def __repr__(self):
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        return 'Rect(x={0.x},y={0.y},w={0.w},h={0.h})'.format(self)
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    def __contains__(self, point):
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        """Test if point is positioned inside rectangle.
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        `point` should be either Point or pair of int values.
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        """
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        x, y = point
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        return (self.x <= x < self.x + self.w
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            and self.y <= y < self.y + self.h)
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94
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    def moved(self, relx, rely):
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        """Return new Rect with same size, moved by `relx`, `rely`."""
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        return Rect(self.x + relx, self.y + rely, self.w, self.h)
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91
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    def intersect(self, other):
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        x1 = max(self.x, other.x)
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        y1 = max(self.y, other.y)
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        x2 = min(self.x + self.w, other.x + other.w)
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        y2 = min(self.y + self.h, other.y + other.h)
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        if x1 >= x2 or y1 >= y2:
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            return Rect()
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        return Rect(x1, y1, x2-x1, y2-y1)
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    def union(self, other):
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        x = min(self.x, other.x)
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        y = min(self.y, other.y)
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        w = max(self.x + self.w, other.x + other.w) - x
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        h = max(self.y + self.h, other.y + other.h) - y
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        return Rect(x, y, w, h)