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Diffstat (limited to 'chat/SVGdraw.py')
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diff --git a/chat/SVGdraw.py b/chat/SVGdraw.py deleted file mode 100644 index abcda11..0000000 --- a/chat/SVGdraw.py +++ /dev/null @@ -1,1069 +0,0 @@ -#!/usr/bin/env python -##Copyright (c) 2002, Fedor Baart & Hans de Wit (Stichting Farmaceutische Kengetallen) -##All rights reserved. -## -##Redistribution and use in source and binary forms, with or without modification, -##are permitted provided that the following conditions are met: -## -##Redistributions of source code must retain the above copyright notice, this -##list of conditions and the following disclaimer. -## -##Redistributions in binary form must reproduce the above copyright notice, -##this list of conditions and the following disclaimer in the documentation and/or -##other materials provided with the distribution. -## -##Neither the name of the Stichting Farmaceutische Kengetallen nor the names of -##its contributors may be used to endorse or promote products derived from this -##software without specific prior written permission. -## -##THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -##AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -##IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -##DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE -##FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -##DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -##SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -##CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -##OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -##OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -##Thanks to Gerald Rosennfellner for his help and useful comments. - -__doc__="""Use SVGdraw to generate your SVGdrawings. - -SVGdraw uses an object model drawing and a method toXML to create SVG graphics -by using easy to use classes and methods usualy you start by creating a drawing eg - - d=drawing() - #then you create a SVG root element - s=svg() - #then you add some elements eg a circle and add it to the svg root element - c=circle() - #you can supply attributes by using named arguments. - c=circle(fill='red',stroke='blue') - #or by updating the attributes attribute: - c.attributes['stroke-width']=1 - s.addElement(c) - #then you add the svg root element to the drawing - d.setSVG(s) - #and finaly you xmlify the drawing - d.toXml() - - -this results in the svg source of the drawing, which consists of a circle -on a white background. Its as easy as that;) -This module was created using the SVG specification of www.w3c.org and the -O'Reilly (www.oreilly.com) python books as information sources. A svg viewer -is available from www.adobe.com""" - -__version__="1.0" - -# there are two possibilities to generate svg: -# via a dom implementation and directly using <element>text</element> strings -# the latter is way faster (and shorter in coding) -# the former is only used in debugging svg programs -# maybe it will be removed alltogether after a while -# with the following variable you indicate whether to use the dom implementation -# Note that PyXML is required for using the dom implementation. -# It is also possible to use the standard minidom. But I didn't try that one. -# Anyway the text based approach is about 60 times faster than using the full dom implementation. -use_dom_implementation=0 - - -import exceptions -if use_dom_implementation<>0: - try: - from xml.dom import implementation - from xml.dom.ext import PrettyPrint - except: - raise exceptions.ImportError, "PyXML is required for using the dom implementation" -#The implementation is used for the creating the XML document. -#The prettyprint module is used for converting the xml document object to a xml file - -import sys -assert sys.version_info[0]>=2 -if sys.version_info[1]<2: - True=1 - False=0 - file=open - -sys.setrecursionlimit=50 -#The recursion limit is set conservative so mistakes like s=svg() s.addElement(s) -#won't eat up too much processor time. - -xlinkNSRef = "http://www.w3.org/1999/xlink" - -#the following code is pasted form xml.sax.saxutils -#it makes it possible to run the code without the xml sax package installed -#To make it possible to have <rubbish> in your text elements, it is necessary to escape the texts -def _escape(data, entities={}): - """Escape &, <, and > in a string of data. - - You can escape other strings of data by passing a dictionary as - the optional entities parameter. The keys and values must all be - strings; each key will be replaced with its corresponding value. - """ - data = data.replace("&", "&") - data = data.replace("<", "<") - data = data.replace(">", ">") - for chars, entity in entities.items(): - data = data.replace(chars, entity) - return data - -def _quoteattr(data, entities={}): - """Escape and quote an attribute value. - - Escape &, <, and > in a string of data, then quote it for use as - an attribute value. The \" character will be escaped as well, if - necessary. - - You can escape other strings of data by passing a dictionary as - the optional entities parameter. The keys and values must all be - strings; each key will be replaced with its corresponding value. - """ - data = _escape(data, entities) - if '"' in data: - if "'" in data: - data = '"%s"' % data.replace('"', """) - else: - data = "'%s'" % data - else: - data = '"%s"' % data - return data - - - -def _xypointlist(a): - """formats a list of xy pairs""" - s='' - for e in a: #this could be done more elegant - s+=str(e)[1:-1] +' ' - return s - -def _viewboxlist(a): - """formats a tuple""" - s='' - for e in a: - s+=str(e)+' ' - return s - -def _pointlist(a): - """formats a list of numbers""" - return str(a)[1:-1] - -class pathdata: - """class used to create a pathdata object which can be used for a path. - although most methods are pretty straightforward it might be useful to look at the SVG specification.""" - #I didn't test the methods below. - def __init__(self,x=None,y=None): - self.path=[] - if x is not None and y is not None: - self.path.append('M '+str(x)+' '+str(y)) - def closepath(self): - """ends the path""" - self.path.append('z') - def move(self,x,y): - """move to absolute""" - self.path.append('M '+str(x)+' '+str(y)) - def relmove(self,x,y): - """move to relative""" - self.path.append('m '+str(x)+' '+str(y)) - def line(self,x,y): - """line to absolute""" - self.path.append('L '+str(x)+' '+str(y)) - def relline(self,x,y): - """line to relative""" - self.path.append('l '+str(x)+' '+str(y)) - def hline(self,x): - """horizontal line to absolute""" - self.path.append('H'+str(x)) - def relhline(self,x): - """horizontal line to relative""" - self.path.append('h'+str(x)) - def vline(self,y): - """verical line to absolute""" - self.path.append('V'+str(y)) - def relvline(self,y): - """vertical line to relative""" - self.path.append('v'+str(y)) - def bezier(self,x1,y1,x2,y2,x,y): - """bezier with xy1 and xy2 to xy absolut""" - self.path.append('C'+str(x1)+','+str(y1)+' '+str(x2)+','+str(y2)+' '+str(x)+','+str(y)) - def relbezier(self,x1,y1,x2,y2,x,y): - """bezier with xy1 and xy2 to xy relative""" - self.path.append('c'+str(x1)+','+str(y1)+' '+str(x2)+','+str(y2)+' '+str(x)+','+str(y)) - def smbezier(self,x2,y2,x,y): - """smooth bezier with xy2 to xy absolut""" - self.path.append('S'+str(x2)+','+str(y2)+' '+str(x)+','+str(y)) - def relsmbezier(self,x2,y2,x,y): - """smooth bezier with xy2 to xy relative""" - self.path.append('s'+str(x2)+','+str(y2)+' '+str(x)+','+str(y)) - def qbezier(self,x1,y1,x,y): - """quadratic bezier with xy1 to xy absolut""" - self.path.append('Q'+str(x1)+','+str(y1)+' '+str(x)+','+str(y)) - def relqbezier(self,x1,y1,x,y): - """quadratic bezier with xy1 to xy relative""" - self.path.append('q'+str(x1)+','+str(y1)+' '+str(x)+','+str(y)) - def smqbezier(self,x,y): - """smooth quadratic bezier to xy absolut""" - self.path.append('T'+str(x)+','+str(y)) - def relsmqbezier(self,x,y): - """smooth quadratic bezier to xy relative""" - self.path.append('t'+str(x)+','+str(y)) - def ellarc(self,rx,ry,xrot,laf,sf,x,y): - """elliptival arc with rx and ry rotating with xrot using large-arc-flag and sweep-flag to xy absolut""" - self.path.append('A'+str(rx)+','+str(ry)+' '+str(xrot)+' '+str(laf)+' '+str(sf)+' '+str(x)+' '+str(y)) - def relellarc(self,rx,ry,xrot,laf,sf,x,y): - """elliptival arc with rx and ry rotating with xrot using large-arc-flag and sweep-flag to xy relative""" - self.path.append('a'+str(rx)+','+str(ry)+' '+str(xrot)+' '+str(laf)+' '+str(sf)+' '+str(x)+' '+str(y)) - def __repr__(self): - return ' '.join(self.path) - - -class Attribute: - def __init__(self, name, value, nsname=None, nsref=None): - self.name = name - self.value = value - self.nsname = nsname - self.nsref = nsref - -class SVGelement: - """SVGelement(type,attributes,elements,text,namespace,**args) - Creates a arbitrary svg element and is intended to be subclassed not used on its own. - This element is the base of every svg element it defines a class which resembles - a xml-element. The main advantage of this kind of implementation is that you don't - have to create a toXML method for every different graph object. Every element - consists of a type, attribute, optional subelements, optional text and an optional - namespace. Note the elements==None, if elements = None:self.elements=[] construction. - This is done because if you default to elements=[] every object has a reference - to the same empty list.""" - def __init__(self,type='',attributes=None,elements=None,text='',namespace='',cdata=None,**args): - self.type=type - self._attributes={} - if attributes: - for key, value in attributes.items(): - attr = Attribute(key, value) - self._attributes[key] = attr - self.elements=[] - if elements: - self.elements=elements - self.text=text - self.namespace=namespace - self.cdata=cdata - for key, value in args.items(): - attr = Attribute(key, value) - self._attributes[key] = attr - self._parent = None - - def addElement(self,SVGelement): - """adds an element to a SVGelement - - SVGelement.addElement(SVGelement) - """ - self.elements.append(SVGelement) - SVGelement.setParent(self) - - def setParent(self, parent): - self._parent = parent - - def addAttribute(self, attribute): - self._attributes[attribute.name] = attribute - - def toXml(self,level,f): - f.write('\t'*level) - f.write('<'+self.type) - if self.namespace: - f.write(' xmlns="'+ _escape(str(self.namespace))+'" ') - for attkey, attr in self._attributes.items(): - if attr.nsname: - f.write(' xmlns:'+_escape(str(attr.nsname))+'="'+_escape(str(attr.nsref))+'" ') - f.write(' '+_escape(str(attr.nsname))+':'+_escape(str(attkey))+'='+_quoteattr(str(attr.value))) - else: - f.write(' '+_escape(str(attkey))+'='+_quoteattr(str(attr.value))) - if self.elements or self.text or self.cdata: - f.write('>') - if self.elements: - f.write('\n') - for element in self.elements: - element.toXml(level+1,f) - if self.cdata: - f.write('\n'+'\t'*(level+1)+'<![CDATA[') - for line in self.cdata.splitlines(): - f.write('\n'+'\t'*(level+2)+line) - f.write('\n'+'\t'*(level+1)+']]>\n') - if self.text: - if type(self.text)==type(''): #If the text is only text - f.write(_escape(str(self.text))) - else: #If the text is a spannedtext class - f.write(str(self.text)) - if self.elements: - f.write('\t'*level+'</'+self.type+'>\n') - elif self.text: - f.write('</'+self.type+'>\n') - elif self.cdata: - f.write('\t'*level+'</'+self.type+'>\n') - else: - f.write('/>\n') - -class tspan(SVGelement): - """ts=tspan(text='',**args) - - a tspan element can be used for applying formatting to a textsection - usage: - ts=tspan('this text is bold') - ts.attributes['font-weight']='bold' - st=spannedtext() - st.addtspan(ts) - t=text(3,5,st) - """ - def __init__(self,text=None,**args): - SVGelement.__init__(self,'tspan',**args) - if self.text<>None: - self.text=text - def __repr__(self): - s="<tspan" - for key, attr in self._attributes.items(): - s+= ' %s="%s"' % (key,attr.value) - s+='>' - s+=self.text - s+='</tspan>' - return s - -class tref(SVGelement): - """tr=tref(link='',**args) - - a tref element can be used for referencing text by a link to its id. - usage: - tr=tref('#linktotext') - st=spannedtext() - st.addtref(tr) - t=text(3,5,st) - """ - def __init__(self,link,**args): - SVGelement.__init__(self,'tref',**args) - self.addAttribute(Attribute('href', link, 'xlink', xlinkNSRef)) - def __repr__(self): - s="<tref" - - for key, attr in self._attributes.items(): - s+= ' %s="%s"' % (key,attr.value) - s+='/>' - return s - -class spannedtext: - """st=spannedtext(textlist=[]) - - a spannedtext can be used for text which consists of text, tspan's and tref's - You can use it to add to a text element or path element. Don't add it directly - to a svg or a group element. - usage: - - ts=tspan('this text is bold') - ts.attributes['font-weight']='bold' - tr=tref('#linktotext') - tr.attributes['fill']='red' - st=spannedtext() - st.addtspan(ts) - st.addtref(tr) - st.addtext('This text is not bold') - t=text(3,5,st) - """ - def __init__(self,textlist=None): - if textlist==None: - self.textlist=[] - else: - self.textlist=textlist - def addtext(self,text=''): - self.textlist.append(text) - def addtspan(self,tspan): - self.textlist.append(tspan) - def addtref(self,tref): - self.textlist.append(tref) - def __repr__(self): - s="" - for element in self.textlist: - s+=str(element) - return s - -class rect(SVGelement): - """r=rect(width,height,x,y,fill,stroke,stroke_width,**args) - - a rectangle is defined by a width and height and a xy pair - """ - def __init__(self,x=None,y=None,width=None,height=None,fill=None,stroke=None,stroke_width=None,**args): - if width==None or height==None: - if width<>None: - raise ValueError, 'height is required' - if height<>None: - raise ValueError, 'width is required' - else: - raise ValueError, 'both height and width are required' - SVGelement.__init__(self,'rect',{'width':width,'height':height},**args) - if x<>None: - self.addAttribute(Attribute('x', x)) - if y<>None: - self.addAttribute(Attribute('y', y)) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - -class ellipse(SVGelement): - """e=ellipse(rx,ry,x,y,fill,stroke,stroke_width,**args) - - an ellipse is defined as a center and a x and y radius. - """ - def __init__(self,cx=None,cy=None,rx=None,ry=None,fill=None,stroke=None,stroke_width=None,**args): - if rx==None or ry== None: - if rx<>None: - raise ValueError, 'rx is required' - if ry<>None: - raise ValueError, 'ry is required' - else: - raise ValueError, 'both rx and ry are required' - SVGelement.__init__(self,'ellipse',{'rx':rx,'ry':ry},**args) - if cx<>None: - self.addAttribute(Attribute('cx', cx)) - if cy<>None: - self.addAttribute(Attribute('cy', cy)) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - - -class circle(SVGelement): - """c=circle(x,y,radius,fill,stroke,stroke_width,**args) - - The circle creates an element using a x, y and radius values eg - """ - def __init__(self,cx=None,cy=None,r=None,fill=None,stroke=None,stroke_width=None,**args): - if r==None: - raise ValueError, 'r is required' - SVGelement.__init__(self,'circle',{'r':r},**args) - if cx<>None: - self.addAttribute(Attribute('cx', cx)) - if cy<>None: - self.addAttribute(Attribute('cy', cy)) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - -class point(circle): - """p=point(x,y,color) - - A point is defined as a circle with a size 1 radius. It may be more efficient to use a - very small rectangle if you use many points because a circle is difficult to render. - """ - def __init__(self,x,y,fill='black',**args): - circle.__init__(self,x,y,1,fill,**args) - -class line(SVGelement): - """l=line(x1,y1,x2,y2,stroke,stroke_width,**args) - - A line is defined by a begin x,y pair and an end x,y pair - """ - def __init__(self,x1=None,y1=None,x2=None,y2=None,stroke=None,stroke_width=None,**args): - SVGelement.__init__(self,'line',**args) - if x1<>None: - self.addAttribute(Attribute('x1', x1)) - if y1<>None: - self.addAttribute(Attribute('y1', y1)) - if x2<>None: - self.addAttribute(Attribute('x2', x2)) - if y2<>None: - self.addAttribute(Attribute('y2', y2)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - -class polyline(SVGelement): - """pl=polyline([[x1,y1],[x2,y2],...],fill,stroke,stroke_width,**args) - - a polyline is defined by a list of xy pairs - """ - def __init__(self,points,fill=None,stroke=None,stroke_width=None,**args): - SVGelement.__init__(self,'polyline',{'points':_xypointlist(points)},**args) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - -class polygon(SVGelement): - """pl=polyline([[x1,y1],[x2,y2],...],fill,stroke,stroke_width,**args) - - a polygon is defined by a list of xy pairs - """ - def __init__(self,points,fill=None,stroke=None,stroke_width=None,**args): - SVGelement.__init__(self,'polygon',{'points':_xypointlist(points)},**args) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - -class path(SVGelement): - """p=path(path,fill,stroke,stroke_width,**args) - - a path is defined by a path object and optional width, stroke and fillcolor - """ - def __init__(self,pathdata,fill=None,stroke=None,stroke_width=None,id=None,**args): - SVGelement.__init__(self,'path',{'d':str(pathdata)},**args) - if stroke<>None: - self.addAttribute(Attribute('stroke', stroke)) - if fill<>None: - self.addAttribute(Attribute('fill', fill)) - if stroke_width<>None: - self.addAttribute(Attribute('stroke-width', stroke_width)) - if id<>None: - self.addAttribute(Attribute('id', id)) - - -class text(SVGelement): - """t=text(x,y,text,font_size,font_family,**args) - - a text element can bge used for displaying text on the screen - """ - def __init__(self,x=None,y=None,text=None,font_size=None,font_family=None,text_anchor=None,**args): - SVGelement.__init__(self,'text',**args) - if x<>None: - self.addAttribute(Attribute('x', x)) - if y<>None: - self.addAttribute(Attribute('y', y)) - if font_size<>None: - self.addAttribute(Attribute('font-size', font_size)) - if font_family<>None: - self.addAttribute(Attribute('font-family', font_family)) - if text<>None: - self.text=text - if text_anchor<>None: - self.addAttribute(Attribute('text-anchor', text_anchor)) - - -class textpath(SVGelement): - """tp=textpath(text,link,**args) - - a textpath places a text on a path which is referenced by a link. - """ - def __init__(self,link,text=None,**args): - SVGelement.__init__(self,'textPath',**args) - self.addAttribute(Attribute('href', link, 'xlink', xlinkNSRef)) - if text<>None: - self.text=text - -class pattern(SVGelement): - """p=pattern(x,y,width,height,patternUnits,**args) - - A pattern is used to fill or stroke an object using a pre-defined - graphic object which can be replicated ("tiled") at fixed intervals - in x and y to cover the areas to be painted. - """ - def __init__(self,x=None,y=None,width=None,height=None,patternUnits=None,**args): - SVGelement.__init__(self,'pattern',**args) - if x<>None: - self.addAttribute(Attribute('x', x)) - if y<>None: - self.addAttribute(Attribute('y', y)) - if width<>None: - self.addAttribute(Attribute('width', width)) - if height<>None: - self.addAttribute(Attribute('height', height)) - if patternUnits<>None: - self.addAttribute(Attribute('patternUnits', patternUnits)) - -class title(SVGelement): - """t=title(text,**args) - - a title is a text element. The text is displayed in the title bar - add at least one to the root svg element - """ - def __init__(self,text=None,**args): - SVGelement.__init__(self,'title',**args) - if text<>None: - self.text=text - -class description(SVGelement): - """d=description(text,**args) - - a description can be added to any element and is used for a tooltip - Add this element before adding other elements. - """ - def __init__(self,text=None,**args): - SVGelement.__init__(self,'desc',**args) - if text<>None: - self.text=text - -class lineargradient(SVGelement): - """lg=lineargradient(x1,y1,x2,y2,id,**args) - - defines a lineargradient using two xy pairs. - stop elements van be added to define the gradient colors. - """ - def __init__(self,x1=None,y1=None,x2=None,y2=None,id=None,**args): - SVGelement.__init__(self,'linearGradient',**args) - if x1<>None: - self.addAttribute(Attribute('x1', x1)) - if y1<>None: - self.addAttribute(Attribute('y1', y1)) - if x2<>None: - self.addAttribute(Attribute('x2', x2)) - if y2<>None: - self.addAttribute(Attribute('y2', y2)) - if id<>None: - self.addAttribute(Attribute('id', id)) - -class radialgradient(SVGelement): - """rg=radialgradient(cx,cy,r,fx,fy,id,**args) - - defines a radial gradient using a outer circle which are defined by a cx,cy and r and by using a focalpoint. - stop elements van be added to define the gradient colors. - """ - def __init__(self,cx=None,cy=None,r=None,fx=None,fy=None,id=None,**args): - SVGelement.__init__(self,'radialGradient',**args) - if cx<>None: - self.addAttribute(Attribute('cx', cx)) - if cy<>None: - self.addAttribute(Attribute('cy', cy)) - if r<>None: - self.addAttribute(Attribute('r', r)) - if fx<>None: - self.addAttribute(Attribute('fx', fx)) - if fy<>None: - self.addAttribute(Attribute('fy', fy)) - if id<>None: - self.addAttribute(Attribute('id', id)) - -class stop(SVGelement): - """st=stop(offset,stop_color,**args) - - Puts a stop color at the specified radius - """ - def __init__(self,offset,stop_color=None,**args): - SVGelement.__init__(self,'stop',{'offset':offset},**args) - if stop_color<>None: - self.addAttribute(Attribute('stop-color', stop_color)) - -class style(SVGelement): - """st=style(type,cdata=None,**args) - - Add a CDATA element to this element for defing in line stylesheets etc.. - """ - def __init__(self,type,cdata=None,**args): - SVGelement.__init__(self,'style',{'type':type},cdata=cdata, **args) - - -class image(SVGelement): - """im=image(url,width,height,x,y,**args) - - adds an image to the drawing. Supported formats are .png, .jpg and .svg. - """ - def __init__(self,url,x=None,y=None,width=None,height=None,**args): - if width==None or height==None: - if width<>None: - raise ValueError, 'height is required' - if height<>None: - raise ValueError, 'width is required' - else: - raise ValueError, 'both height and width are required' - SVGelement.__init__(self,'image',{'width':width,'height':height},**args) - self.addAttribute(Attribute('href', url, 'xlink', xlinkNSRef)) - if x<>None: - self.addAttribute(Attribute('x', x)) - if y<>None: - self.addAttribute(Attribute('y', y)) - -class cursor(SVGelement): - """c=cursor(url,**args) - - defines a custom cursor for a element or a drawing - """ - def __init__(self,url,**args): - SVGelement.__init__(self,'cursor',**args) - self.addAttribute(Attribute('href', url, 'xlink', xlinkNSRef)) - - -class marker(SVGelement): - """m=marker(id,viewbox,refX,refY,markerWidth,markerHeight,**args) - - defines a marker which can be used as an endpoint for a line or other pathtypes - add an element to it which should be used as a marker. - """ - def __init__(self,id=None,viewBox=None,refx=None,refy=None,markerWidth=None,markerHeight=None,**args): - SVGelement.__init__(self,'marker',**args) - if id<>None: - self.addAttribute(Attribute('id', id)) - if viewBox<>None: - self.addAttribute(Attribute('viewBox', _viewboxlist(viewBox))) - if refx<>None: - self.addAttribute(Attribute('refX', refx)) - if refy<>None: - self.addAttribute(Attribute('refY', refy)) - if markerWidth<>None: - self.addAttribute(Attribute('markerWidth', markerWidth)) - if markerHeight<>None: - self.addAttribute(Attribute('markerHeight', markerHeight)) - -class group(SVGelement): - """g=group(id,**args) - - a group is defined by an id and is used to contain elements - g.addElement(SVGelement) - """ - def __init__(self,id=None,**args): - SVGelement.__init__(self,'g',**args) - if id<>None: - self.addAttribute(Attribute('id', id)) - -class symbol(SVGelement): - """sy=symbol(id,viewbox,**args) - - defines a symbol which can be used on different places in your graph using - the use element. A symbol is not rendered but you can use 'use' elements to - display it by referencing its id. - sy.addElement(SVGelement) - """ - - def __init__(self,id=None,viewBox=None,**args): - SVGelement.__init__(self,'symbol',**args) - if id<>None: - self.addAttribute(Attribute('id', id)) - if viewBox<>None: - self.addAttribute(Attribute('viewBox', _viewboxlist(viewBox))) - -class defs(SVGelement): - """d=defs(**args) - - container for defining elements - """ - def __init__(self,**args): - SVGelement.__init__(self,'defs',**args) - -class switch(SVGelement): - """sw=switch(**args) - - Elements added to a switch element which are "switched" by the attributes - requiredFeatures, requiredExtensions and systemLanguage. - Refer to the SVG specification for details. - """ - def __init__(self,**args): - SVGelement.__init__(self,'switch',**args) - - -class use(SVGelement): - """u=use(link,x,y,width,height,**args) - - references a symbol by linking to its id and its position, height and width - """ - def __init__(self,link,x=None,y=None,width=None,height=None,**args): - SVGelement.__init__(self,'use',**args) - self.addAttribute(Attribute('href', link, 'xlink', xlinkNSRef)) - if x<>None: - self.addAttribute(Attribute('x', x)) - if y<>None: - self.addAttribute(Attribute('y', y)) - - if width<>None: - self.addAttribute(Attribute('width', width)) - if height<>None: - self.addAttribute(Attribute('height', height)) - - -class link(SVGelement): - """a=link(url,**args) - - a link is defined by a hyperlink. add elements which have to be linked - a.addElement(SVGelement) - """ - def __init__(self,link='',**args): - SVGelement.__init__(self,'a',**args) - self.addAttribute(Attribute('href', link, 'xlink', xlinkNSRef)) - -class view(SVGelement): - """v=view(id,**args) - - a view can be used to create a view with different attributes""" - def __init__(self,id=None,**args): - SVGelement.__init__(self,'view',**args) - if id<>None: - self.addAttribute(Attribute('id', id)) - -class script(SVGelement): - """sc=script(type,type,cdata,**args) - - adds a script element which contains CDATA to the SVG drawing - - """ - def __init__(self,type,cdata=None,**args): - SVGelement.__init__(self,'script',{'type':type},cdata=cdata,**args) - -class animate(SVGelement): - """an=animate(attribute,from,to,during,**args) - - animates an attribute. - """ - def __init__(self,attribute,fr=None,to=None,dur=None,**args): - SVGelement.__init__(self,'animate',{'attributeName':attribute},**args) - if fr<>None: - self.addAttribute(Attribute('from', fr)) - if to<>None: - self.addAttribute(Attribute('to', to)) - if dur<>None: - self.addAttribute(Attribute('dur', dur)) - -class animateMotion(SVGelement): - """an=animateMotion(pathdata,dur,**args) - - animates a SVGelement over the given path in dur seconds - """ - def __init__(self,pathdata,dur,**args): - SVGelement.__init__(self,'animateMotion',**args) - if pathdata<>None: - self.addAttribute(Attribute('path', str(pathdata))) - if dur<>None: - self.addAttribute(Attribute('dur', dur)) - -class animateTransform(SVGelement): - """antr=animateTransform(type,from,to,dur,**args) - - transform an element from and to a value. - """ - def __init__(self,type=None,fr=None,to=None,dur=None,**args): - SVGelement.__init__(self,'animateTransform',{'attributeName':'transform'},**args) - #As far as I know the attributeName is always transform - if type<>None: - self.addAttribute(Attribute('type', type)) - if fr<>None: - self.addAttribute(Attribute('from', fr)) - if to<>None: - self.addAttribute(Attribute('to', to)) - if dur<>None: - self.addAttribute(Attribute('dur', dur)) -class animateColor(SVGelement): - """ac=animateColor(attribute,type,from,to,dur,**args) - - Animates the color of a element - """ - def __init__(self,attribute,type=None,fr=None,to=None,dur=None,**args): - SVGelement.__init__(self,'animateColor',{'attributeName':attribute},**args) - if type<>None: - self.addAttribute(Attribute('type', type)) - if fr<>None: - self.addAttribute(Attribute('from', fr)) - if to<>None: - self.addAttribute(Attribute('to', to)) - if dur<>None: - self.addAttribute(Attribute('dur', dur)) -class set(SVGelement): - """st=set(attribute,to,during,**args) - - sets an attribute to a value for a - """ - def __init__(self,attribute,to=None,dur=None,**args): - SVGelement.__init__(self,'set',{'attributeName':attribute},**args) - if to<>None: - self.addAttribute(Attribute('to', to)) - if dur<>None: - self.addAttribute(Attribute('dur', dur)) - - - -class svg(SVGelement): - """s=svg(viewbox,width,height,**args) - - a svg or element is the root of a drawing add all elements to a svg element. - You can have different svg elements in one svg file - s.addElement(SVGelement) - - eg - d=drawing() - s=svg((0,0,100,100),'100%','100%') - c=circle(50,50,20) - s.addElement(c) - d.setSVG(s) - d.toXml() - """ - def __init__(self,viewBox=None, width=None, height=None,**args): - SVGelement.__init__(self,'svg',**args) - if viewBox<>None: - self.addAttribute(Attribute('viewBox', _viewboxlist(viewBox))) - if width<>None: - self.addAttribute(Attribute('width', width)) - if height<>None: - self.addAttribute(Attribute('height', height_)) - self.namespace="http://www.w3.org/2000/svg" - -class drawing: - """d=drawing() - - this is the actual SVG document. It needs a svg element as a root. - Use the addSVG method to set the svg to the root. Use the toXml method to write the SVG - source to the screen or to a file - d=drawing() - d.addSVG(svg) - d.toXml(optionalfilename) - """ - - def __init__(self): - self.svg=None - - def setSVG(self,svg): - self.svg=svg - #Voeg een element toe aan de grafiek toe. - - if use_dom_implementation==0: - def toXml(self, filename='',compress=False): - import cStringIO - xml=cStringIO.StringIO() - xml.write("<?xml version='1.0' encoding='UTF-8'?>\n") - xml.write("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\" \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd \">\n") - self.svg.toXml(0,xml) - if not filename: - if compress: - import gzip - f=cStringIO.StringIO() - zf=gzip.GzipFile(fileobj=f,mode='wb') - zf.write(xml.getvalue()) - zf.close() - f.seek(0) - return f.read() - else: - return xml.getvalue() - else: - if filename[-4:]=='svgz': - import gzip - f=gzip.GzipFile(filename=filename,mode="wb", compresslevel=9) - f.write(xml.getvalue()) - f.close() - else: - f=file(filename,'w') - f.write(xml.getvalue()) - f.close() - - else: - def toXml(self,filename='',compress=False): - """drawing.toXml() ---->to the screen - drawing.toXml(filename)---->to the file - writes a svg drawing to the screen or to a file - compresses if filename ends with svgz or if compress is true - """ - doctype = implementation.createDocumentType('svg',"-//W3C//DTD SVG 1.0//EN""",'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd ') - - global root - #root is defined global so it can be used by the appender. Its also possible to use it as an arugument but - #that is a bit messy. - root=implementation.createDocument(None,None,doctype) - #Create the xml document. - global appender - def appender(element,elementroot): - """This recursive function appends elements to an element and sets the attributes - and type. It stops when alle elements have been appended""" - if element.namespace: - e=root.createElementNS(element.namespace,element.type) - else: - e=root.createElement(element.type) - if element.text: - textnode=root.createTextNode(element.text) - e.appendChild(textnode) - for attr in element.attributes.values(): #in element.attributes is supported from python 2.2 - if attr.nsname and attr.nsref: - e.setAttributeNS(attr.nsref, attr.nsname+":"+attr.name, str(attr.value)) - else: - e.setAttribute(attr.name,str(attr.value)) - if element.elements: - for el in element.elements: - e=appender(el,e) - elementroot.appendChild(e) - return elementroot - root=appender(self.svg,root) - if not filename: - import cStringIO - xml=cStringIO.StringIO() - PrettyPrint(root,xml) - if compress: - import gzip - f=cStringIO.StringIO() - zf=gzip.GzipFile(fileobj=f,mode='wb') - zf.write(xml.getvalue()) - zf.close() - f.seek(0) - return f.read() - else: - return xml.getvalue() - else: - try: - if filename[-4:]=='svgz': - import gzip - import cStringIO - xml=cStringIO.StringIO() - PrettyPrint(root,xml) - f=gzip.GzipFile(filename=filename,mode='wb',compresslevel=9) - f.write(xml.getvalue()) - f.close() - else: - f=open(filename,'w') - PrettyPrint(root,f) - f.close() - except: - print "Cannot write SVG file: " + filename - - def validate(self): - try: - import xml.parsers.xmlproc.xmlval - except: - raise exceptions.ImportError,'PyXml is required for validating SVG' - svg=self.toXml() - xv=xml.parsers.xmlproc.xmlval.XMLValidator() - try: - xv.feed(svg) - except: - raise "SVG is not well formed, see messages above" - else: - print "SVG well formed" - - -if __name__=='__main__': - - - d=drawing() - s=svg((0,0,100,100)) - r=rect(-100,-100,300,300,'cyan') - s.addElement(r) - - t=title('SVGdraw Demo') - s.addElement(t) - g=group('animations') - e=ellipse(0,0,5,2) - g.addElement(e) - c=circle(0,0,1,'red') - g.addElement(c) - pd=pathdata(0,-10) - for i in range(6): - pd.relsmbezier(10,5,0,10) - pd.relsmbezier(-10,5,0,10) - an=animateMotion(pd,10) - an.addAttribute(Attribute('rotate', 'auto-reverse')) - an.addAttribute(Attribute('repeatCount', "indefinite")) - g.addElement(an) - s.addElement(g) - for i in range(20,120,20): - u=use('#animations',i,0) - s.addElement(u) - for i in range(0,120,20): - for j in range(5,105,10): - c=circle(i,j,1,'red','black',.5) - s.addElement(c) - d.setSVG(s) - - print d.toXml() - |