modal_cursor.py 文件源码

def __init__(self, **kwargs):
        super(ResizeCursor, self).__init__(**kwargs)
        self.size_hint = (None, None)
        self.pos_hint = (None, None)
        self.source = ''
        self.rect = Rectangle(pos=(-9998,-9998), size=(1, 1))
        self.size = (dp(22), dp(22))
        self.pos = [-9998, -9998]

        # Makes an instruction group with a rectangle and
        # loads an image inside it
        # Binds its properties to mouse positional changes and events triggered
        instr = InstructionGroup()
        instr.add(self.rect)
        self.canvas.after.add(instr)
        self.bind(pos=lambda obj, val: setattr(self.rect, 'pos', val))
        self.bind(source=lambda obj, val: setattr(self.rect, 'source', val))
        self.bind(hidden=lambda obj, val: self.on_mouse_move(Window.mouse_pos))
        Window.bind(mouse_pos=lambda obj, val: self.on_mouse_move(val))