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#------------------------------------------------------------------------------
# Copyright (c) 2012, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#------------------------------------------------------------------------------
import numpy as np
from kiva.fonttools import Font
from kiva.quartz import get_mac_context, ABCGI
from base_window import BaseWindow
from scrollbar import NativeScrollBar
CompiledPath = ABCGI.CGMutablePath
class GraphicsContext(ABCGI.CGLayerContext):
def __init__(self, size_or_array, *args, **kwds):
gc = kwds.pop('window_gc', None)
if not gc:
# Create a tiny base context to spawn the CGLayerContext from.
# We are better off making our Layer from the window gc since
# the data formats will match and so it will be faster to draw the
# layer.
gc = ABCGI.CGBitmapContext((1,1))
if isinstance(size_or_array, np.ndarray):
# Initialize the layer with an image.
image = ABCGI.CGImage(size_or_array)
width = image.width
height = image.height
else:
# No initialization.
image = None
width, height = size_or_array
super(GraphicsContext, self).__init__((width, height), gc, *args, **kwds)
if image is not None:
self.draw_image(image)
@classmethod
def create_from_gc(klass, gc, size_or_array, *args, **kwds):
return klass(size_or_array, window_gc=gc, *args, **kwds)
class _WindowGraphicsContext(ABCGI.CGContextInABox):
def __init__(self, *args, **kwds):
super(_WindowGraphicsContext, self).__init__(*args, **kwds)
self._begun = False
def begin(self):
if self._begun:
return
self.save_state()
self.translate_ctm(0, self.height())
self.scale_ctm(1.0, -1.0)
self._begun = True
def end(self):
if self._begun:
self.restore_state()
self._begun = False
@staticmethod
def create_from_gc(gc, size_or_array, *args, **kwds):
return GraphicsContext(size_or_array, window_gc=gc, *args, **kwds)
class Window(BaseWindow):
""" An Enable Window for Qt GUIs on OS X.
"""
#### 'BaseWindow' interface ################################################
def _create_gc(self, size, pix_format=None):
if hasattr(self.control, 'winId'):
# From the Qt 4.7 Documentation:
# "On Mac OS X, the type returned depends on which framework Qt was
# linked against. If Qt is using Carbon, the {WId} is actually
# an HIViewRef. If Qt is using Cocoa, {WId} is a pointer to
# an NSView."
# get_mac_context() only works on Cocoa.
self.dc = get_mac_context(self.control.winId())
if self.dc:
gc = _WindowGraphicsContext(size, self.dc)
gc.begin()
return gc
raise NotImplementedError("Only Qt built against Cocoa is supported")
def _window_paint(self, event):
# Make sure end() is called so that the window's GC is not left in an
# odd state.
self._gc.end()
# Force a new gc to be created for the next paint()
self._gc = None
self.dc = None
def font_metrics_provider():
gc = GraphicsContext((1, 1))
gc.set_font(Font())
return gc
#### EOF #######################################################################
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