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import copy
import numpy
import warnings
import wx
from enable.savage.svg.backends.null.null_renderer import NullRenderer
def _fixup_path_methods(path):
def _new_add_rounded_rectangle(self, x, y, w, h, rx, ry):
r = numpy.sqrt(rx*rx + ry*ry)
self.AddRoundedRectangle(x, y, w, h, r)
path.__class__.AddRoundedRectangleEx = _new_add_rounded_rectangle
class AbstractGradientBrush(object):
""" Abstract base class for gradient brushes so they can be detected easily.
"""
def IsOk(self):
return True
def bbox_transform(self, gc, bbox):
""" Apply a transformation to make the bbox a unit square.
"""
x0, y0, w, h = bbox
gc.concat_ctm(((w, 0, 0), (0, h, 0), (x0, y0, 1)))
class Renderer(NullRenderer):
NullBrush = wx.NullBrush
NullGraphicsBrush = wx.NullGraphicsBrush
NullPen = wx.NullPen
TransparentPen = wx.TRANSPARENT_PEN
caps = {
'butt':wx.CAP_BUTT,
'round':wx.CAP_ROUND,
'square':wx.CAP_PROJECTING
}
joins = {
'miter':wx.JOIN_MITER,
'round':wx.JOIN_ROUND,
'bevel':wx.JOIN_BEVEL
}
fill_rules = {'nonzero':wx.WINDING_RULE, 'evenodd': wx.ODDEVEN_RULE}
def __init__(self):
pass
@staticmethod
def concatTransform(*args):
return wx.GraphicsContext.ConcatTransform(*args)
@staticmethod
def createAffineMatrix(a,b,c,d,x,y):
return wx.GraphicsRenderer_GetDefaultRenderer().CreateMatrix(a,b,c,d,x,y)
@staticmethod
def createBrush(color_tuple):
return wx.Brush(wx.Colour(*color_tuple))
@staticmethod
def createNativePen(pen):
return wx.GraphicsRenderer_GetDefaultRenderer().CreatePen(pen)
@staticmethod
def createPen(color_tuple):
return wx.Pen(wx.Colour(*color_tuple))
@staticmethod
def createLinearGradientBrush(x1,y1,x2,y2, stops, spreadMethod='pad',
transforms=None, units='userSpaceOnUse'):
stops = numpy.transpose(stops)
if len(stops) > 2:
warnings.warn("Wx only supports 2 gradient stops, but %d were specified" % len(stops))
def convert_stop(stop):
offset, red, green, blue, opacity = stop
color = wx.Colour(red*255, green*255, blue*255, opacity*255)
return offset, color
start_offset, start_color = convert_stop(stops[0])
end_offset, end_color = convert_stop(stops[1])
wx_renderer = wx.GraphicsRenderer.GetDefaultRenderer()
return wx_renderer.CreateLinearGradientBrush(x1, y1, x2, y2,
start_color, end_color)
@staticmethod
def createRadialGradientBrush(cx,cy, r, stops, fx=None,fy=None,
spreadMethod='pad', transforms=None,
units='userSpaceOnUse'):
stops = numpy.transpose(stops)
if len(stops) > 2:
warnings.warn("Wx only supports 2 gradient stops, but %d were specified" % len(stops))
def convert_stop(stop):
offset, red, green, blue, opacity = stop
color = wx.Colour(red*255, green*255, blue*255, opacity*255)
return offset, color
start_offset, start_color = convert_stop(stops[0])
end_offset, end_color = convert_stop(stops[-1])
if fx is None:
fx = cx
if fy is None:
fy = cy
wx_renderer = wx.GraphicsRenderer.GetDefaultRenderer()
return wx_renderer.CreateRadialGradientBrush(fx, fy, cx, cy, r,
start_color, end_color)
@staticmethod
def fillPath(*args):
return wx.GraphicsContext.FillPath(*args)
@staticmethod
def getCurrentPoint(path):
return path.GetCurrentPoint().Get()
@staticmethod
def getFont(font_name=wx.SYS_DEFAULT_GUI_FONT):
return wx.SystemSettings.GetFont(font_name)
@staticmethod
def makeMatrix(*args):
return wx.GraphicsRenderer_GetDefaultRenderer().CreateMatrix(*args)
@staticmethod
def makePath():
path = wx.GraphicsRenderer_GetDefaultRenderer().CreatePath()
_fixup_path_methods(path)
return path
@staticmethod
def popState(*args):
return wx.GraphicsContext.PopState(*args)
@staticmethod
def pushState(state):
return wx.GraphicsContext.PushState(state)
@staticmethod
def rotate(dc, angle):
return dc.Rotate(angle)
@staticmethod
def scale(*args):
return wx.GraphicsContext.Scale(*args)
@staticmethod
def setBrush(*args):
wx.GraphicsContext.SetBrush(*args)
@staticmethod
def setFontSize(font, size):
if '__WXMSW__' in wx.PlatformInfo:
i = int(size)
font.SetPixelSize((i, i))
else:
font.SetPointSize(int(size))
return font
@classmethod
def setFontStyle(cls, font, style):
font.style = style
@classmethod
def setFontWeight(cls, font, weight):
font.weight = weight
@staticmethod
def setPen(*args):
wx.GraphicsContext.SetPen(*args)
@staticmethod
def setPenDash(pen, dasharray, offset):
pen.SetDashes(dasharray)
@staticmethod
def setFont(context, font, brush):
return context.SetFont(font, brush.Colour)
@staticmethod
def strokePath(*args):
return wx.GraphicsContext.StrokePath(*args)
@staticmethod
def clipPath(gc, path):
rect = path.GetBox()
region = wx.Region(rect.x, rect.y, rect.width, rect.height)
gc.ClipRegion(region)
@staticmethod
def translate(*args):
return wx.GraphicsContext.Translate(*args)
@staticmethod
def DrawText(context, text, x, y, brush=NullGraphicsBrush, anchor='start'):
#SVG spec appears to originate text from the bottom
#rather than the top as with our API. This function
#will measure and then re-orient the text as needed.
w, h = context.GetTextExtent(text)
if anchor != 'start':
if anchor == 'middle':
x -= w/2.0
elif anchor == 'end':
x -= w
y -= h
context.DrawText(text, x, y)
@staticmethod
def DrawImage(context, image, x, y, width, height):
# ignore the width & height provided
width = image.shape[1]
height = image.shape[0]
if image.shape[2] == 3:
bmp = wx.BitmapFromBuffer(width, height, image.flatten())
else:
bmp = wx.BitmapFromBufferRGBA(width, height, image.flatten())
context.DrawBitmap(bmp, x, y, width, height)
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