kopia lustrzana https://github.com/brendabell/knittingtools
60 wiersze
2.0 KiB
Python
60 wiersze
2.0 KiB
Python
# coding: utf8
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"""
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cairocffi.xcb
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~~~~~~~~~~~~~
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Bindings for XCB surface objects using xcffib.
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:copyright: Copyright 2014 by Simon Sapin
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:license: BSD, see LICENSE for details.
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"""
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from xcffib import visualtype_to_c_struct
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from . import cairo, constants
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from .surfaces import Surface, SURFACE_TYPE_TO_CLASS
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class XCBSurface(Surface):
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"""The XCB surface is used to render cairo graphics to X Window System
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windows and pixmaps using the XCB library.
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Creates a cairo surface that targets the given drawable (pixmap or window).
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.. note::
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This class works using objects and libraries in :mod:`xcffib`
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:param conn: The :class:`xcffib.Connection` for an open XCB connection
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:param drawable:
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An XID corresponding to an XCB drawable (a pixmap or a window)
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:param visual: An :class:`xcffib.xproto.VISUALTYPE` object.
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:param width: integer
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:param height: integer
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"""
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def __init__(self, conn, drawable, visual, width, height):
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c_visual = visualtype_to_c_struct(visual)
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p = cairo.cairo_xcb_surface_create(
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conn._conn, drawable, c_visual, width, height)
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Surface.__init__(self, p)
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def set_size(self, width, height):
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"""
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Informs cairo of the new size of the X Drawable underlying the surface.
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For a surface created for a Window (rather than a Pixmap), this
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function must be called each time the size of the window changes (for
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a subwindow, you are normally resizing the window yourself, but for a
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toplevel window, it is necessary to listen for
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:class:`xcffib.xproto.ConfigureNotifyEvent`'s).
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A Pixmap can never change size, so it is never necessary to call this
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function on a surface created for a Pixmap.
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:param width: integer
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:param height: integer
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"""
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cairo.cairo_xcb_surface_set_size(self._pointer, width, height)
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self._check_status()
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SURFACE_TYPE_TO_CLASS[constants.SURFACE_TYPE_XCB] = XCBSurface
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