Пример #1
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def add_converter(context, from_type, converter):
    """Register `converter` for converting `from_type` in `context`"""
    # XXX if converters cached by record types, add hooks here for updating
    gf = get_converter(context)
    if not get_converter.has_object(context):
        gf = generic(gf)    # extend base function
        get_converter.when_object(context)(lambda context: gf)
    gf.when_type(from_type)(converter)
Пример #2
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def add_converter(context, from_type, converter):
    """Register `converter` for converting `from_type` in `context`"""
    # XXX if converters cached by record types, add hooks here for updating
    gf = get_converter(context)
    if not get_converter.has_object(context):
        gf = generic(gf)  # extend base function
        get_converter.when_object(context)(lambda context: gf)
    gf.when_type(from_type)(converter)
Пример #3
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        self.item = item

    def horizontal(self):
        """
        Return horizontal edges (on y axis)
        """
        return ()

    def vertical(self):
        """
        Return vertical edges (on x axis)
        """
        return ()


Guide = generic(ItemGuide)


@Guide.when_type(Element)
class ElementGuide(ItemGuide):

    def horizontal(self):
        y = self.item.height
        return (0, y/2, y)

    def vertical(self):
        x = self.item.width
        return (0, x/2, x)

@Guide.when_type(Line)
class LineGuide(ItemGuide):
Пример #4
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from gaphas.item import Item, Element


class ItemFinder(object):
    """
    Find an item on the canvas.
    """
    def __init__(self, view):
        self.view = view

    def get_item_at_point(self, pos):
        item, handle = self.view.get_handle_at_point(pos)
        return item or self.view.get_item_at_point(pos)


Finder = generic(ItemFinder)


class ItemSelection(object):
    """
    A role for items. When dealing with selection.

    Behaviour can be overridden by applying the @aspect decorator
    to a subclass.
    """
    def __init__(self, item, view):
        self.item = item
        self.view = view

    def select(self):
        """
Пример #5
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        assert 0 <= segment < len(item.ports()) - 1

        before = handles[handle_index - 1]
        after = handles[handle_index + 1]
        d, p = distance_line_point(before.pos, after.pos, handle.pos)

        # Checks how far the waypoint is from an imaginary line connecting the previous and next way/end point
        # If it is close, the two segments are merged to one
        merge_distance = item.line_width * 4
        if d < merge_distance:
            assert len(self.view.canvas.solver._marked_cons) == 0
            Segment(item, self.view).merge_segment(segment)

        if handle:
            item.request_update()


class ItemPaintHovered(object):
    """
    Paints on top of all items, just for the hovered item (see painter.HoveredItemPainter)
    """
    def __init__(self, item, view):
        self.item = item
        self.view = view

    def paint(self, context, selected):
        pass


PaintHovered = generic(ItemPaintHovered)
Пример #6
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class ItemFinder(object):
    """
    Find an item on the canvas.
    """

    def __init__(self, view):
        self.view = view

    def get_item_at_point(self, pos):
        item, handle = self.view.get_handle_at_point(pos)
        return item or self.view.get_item_at_point(pos)


Finder = generic(ItemFinder)


class ItemSelection(object):
    """
    A role for items. When dealing with selection.

    Behaviour can be overridden by applying the @aspect decorator
    to a subclass.
    """

    def __init__(self, item, view):
        self.item = item
        self.view = view

    def select(self):
Пример #7
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        self.item = item

    def horizontal(self):
        """
        Return horizontal edges (on y axis)
        """
        return ()

    def vertical(self):
        """
        Return vertical edges (on x axis)
        """
        return ()


Guide = generic(ItemGuide)


@Guide.when_type(Element)
class ElementGuide(ItemGuide):
    """Guide to align Element items.

    """
    def horizontal(self):
        y = self.item.height
        return (0, y / 2, y)

    def vertical(self):
        x = self.item.width
        return (0, x / 2, x)
Пример #8
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def subtype(typeinfo, *args, **kw):
    """XXX"""
    newti = typeinfo_for(typeinfo).clone(*args, **kw)
    gf = generic(get_converter(typeinfo))
    get_converter.when_object(newti)(lambda ctx:gf)
    return newti
Пример #9
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def create_default_converter(t):
    converter = generic(default_converter)
    converter.when_object(NoChange)(lambda val: val)
    converter.when_object(Inherit)(lambda val: val)
    converter.when_object(None)(lambda val: val)
    get_converter.when_object(t)(lambda ctx: converter)
Пример #10
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def subtype(typeinfo, *args, **kw):
    """XXX"""
    newti = typeinfo_for(typeinfo).clone(*args, **kw)
    gf = generic(get_converter(typeinfo))
    get_converter.when_object(newti)(lambda ctx: gf)
    return newti
Пример #11
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def create_default_converter(t):
    converter = generic(default_converter)
    converter.when_object(NoChange)(lambda val: val)
    converter.when_object(Inherit)(lambda val: val)
    converter.when_object(None)(lambda val: val)
    get_converter.when_object(t)(lambda ctx: converter)