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#Copyright ReportLab Europe Ltd. 2000-2017 #see license.txt for license details __version__='3.3.0' __doc__="""Collection of axes for charts. The current collection comprises axes for charts using cartesian coordinate systems. All axes might have tick marks and labels. There are two dichotomies for axes: one of X and Y flavours and another of category and value flavours. Category axes have an ordering but no metric. They are divided into a number of equal-sized buckets. Their tick marks or labels, if available, go BETWEEN the buckets, and the labels are placed below to/left of the X/Y-axis, respectively. Value axes have an ordering AND metric. They correspond to a nu- meric quantity. Value axis have a real number quantity associated with it. The chart tells it where to go. The most basic axis divides the number line into equal spaces and has tickmarks and labels associated with each; later we will add variants where you can specify the sampling interval. The charts using axis tell them where the labels should be placed. Axes of complementary X/Y flavours can be connected to each other in various ways, i.e. with a specific reference point, like an x/value axis to a y/value (or category) axis. In this case the connection can be either at the top or bottom of the former or at any absolute value (specified in points) or at some value of the former axes in its own coordinate system. """ from math import log10 as math_log10 from reportlab import xrange from reportlab.lib.validators import isNumber, isNumberOrNone, isListOfStringsOrNone, isListOfNumbers, \ isListOfNumbersOrNone, isColorOrNone, OneOf, isBoolean, SequenceOf, \ isString, EitherOr, Validator, NoneOr, isInstanceOf, \ isNormalDate, isNoneOrCallable from reportlab.lib.attrmap import * from reportlab.lib import normalDate from reportlab.graphics.shapes import Drawing, Line, PolyLine, Rect, Group, STATE_DEFAULTS, _textBoxLimits, _rotatedBoxLimits from reportlab.graphics.widgetbase import Widget, TypedPropertyCollection from reportlab.graphics.charts.textlabels import Label, PMVLabel, XLabel, DirectDrawFlowable from reportlab.graphics.charts.utils import nextRoundNumber from reportlab.graphics.widgets.grids import ShadedRect from reportlab.lib.colors import Color from reportlab.lib.utils import isSeq from reportlab import xrange import copy try: reduce # Python 2.x except NameError: from functools import reduce # Helpers. def _findMinMaxValue(V, x, default, func, special=None): if isSeq(V[0][0]): if special: f=lambda T,x=x,special=special,func=func: special(T,x,func) else: f=lambda T,x=x: T[x] V=list(map(lambda e,f=f: list(map(f,e)),V)) V = list(filter(len,[[x for x in x if x is not None] for x in V])) if len(V)==0: return default return func(list(map(func,V))) def _findMin(V, x, default,special=None): '''find minimum over V[i][x]''' return _findMinMaxValue(V,x,default,min,special=special) def _findMax(V, x, default,special=None): '''find maximum over V[i][x]''' return _findMinMaxValue(V,x,default,max,special=special) def _allInt(values): '''true if all values are int''' for v in values: try: if int(v)!=v: return 0 except: return 0 return 1 class AxisLabelAnnotation: '''Create a grid like line using the given user value to draw the line v value to use kwds may contain scaleValue True/not given --> scale the value otherwise use the absolute value labelClass the label class to use default Label all Label keywords are acceptable (including say _text) ''' def __init__(self,v,**kwds): self._v = v self._kwds = kwds def __call__(self,axis): kwds = self._kwds.copy() labelClass = kwds.pop('labelClass',Label) scaleValue = kwds.pop('scaleValue',True) if not hasattr(axis,'_tickValues'): axis._pseudo_configure() sv = (axis.scale if scaleValue else lambda x: x)(self._v) if axis.isYAxis: x = axis._x y = sv else: x = sv y = axis._y kwds['x'] = x kwds['y'] = y return labelClass(**kwds) class AxisLineAnnotation: '''Create a grid like line using the given user value to draw the line kwds may contain startOffset if true v is offset from the default grid start position endOffset if true v is offset from the default grid end position scaleValue True/not given --> scale the value otherwise use the absolute value lo lowest coordinate to draw default 0 hi highest coordinate to draw at default = length drawAtLimit True draw line at appropriate limit if its coordinate exceeds the lo, hi range False ignore if it's outside the range all Line keywords are acceptable ''' def __init__(self,v,**kwds): self._v = v self._kwds = kwds def __call__(self,axis): kwds = self._kwds.copy() scaleValue = kwds.pop('scaleValue',True) endOffset = kwds.pop('endOffset',False) startOffset = kwds.pop('startOffset',False) if axis.isYAxis: offs = axis._x d0 = axis._y else: offs = axis._y d0 = axis._x s = kwds.pop('start',None) e = kwds.pop('end',None) if s is None or e is None: dim = getattr(getattr(axis,'joinAxis',None),'getGridDims',None) if dim and hasattr(dim,'__call__'): dim = dim() if dim: if s is None: s = dim[0] if e is None: e = dim[1] else: if s is None: s = 0 if e is None: e = 0 hi = kwds.pop('hi',axis._length)+d0 lo = kwds.pop('lo',0)+d0 lo,hi=min(lo,hi),max(lo,hi) drawAtLimit = kwds.pop('drawAtLimit',False) oaglp = axis._get_line_pos if not scaleValue: axis._get_line_pos = lambda x: x try: v = self._v if endOffset: v = v + hi elif startOffset: v = v + lo func = axis._getLineFunc(s-offs,e-offs,kwds.pop('parent',None)) if not hasattr(axis,'_tickValues'): axis._pseudo_configure() d = axis._get_line_pos(v) if d<lo or d>hi: if not drawAtLimit: return None if d<lo: d = lo else: d = hi axis._get_line_pos = lambda x: d L = func(v) for k,v in kwds.items(): setattr(L,k,v) finally: axis._get_line_pos = oaglp return L class AxisBackgroundAnnotation: '''Create a set of coloured bars on the background of a chart using axis ticks as the bar borders colors is a set of colors to use for the background bars. A colour of None is just a skip. Special effects if you pass a rect or Shaded rect instead. ''' def __init__(self,colors,**kwds): self._colors = colors self._kwds = kwds def __call__(self,axis): colors = self._colors if not colors: return kwds = self._kwds.copy() isYAxis = axis.isYAxis if isYAxis: offs = axis._x d0 = axis._y else: offs = axis._y d0 = axis._x s = kwds.pop('start',None) e = kwds.pop('end',None) if s is None or e is None: dim = getattr(getattr(axis,'joinAxis',None),'getGridDims',None) if dim and hasattr(dim,'__call__'): dim = dim() if dim: if s is None: s = dim[0] if e is None: e = dim[1] else: if s is None: s = 0 if e is None: e = 0 if not hasattr(axis,'_tickValues'): axis._pseudo_configure() tv = getattr(axis,'_tickValues',None) if not tv: return G = Group() ncolors = len(colors) v0 = axis._get_line_pos(tv[0]) for i in xrange(1,len(tv)): v1 = axis._get_line_pos(tv[i]) c = colors[(i-1)%ncolors] if c: if isYAxis: y = v0 x = s height = v1-v0 width = e-s else: x = v0 y = s width = v1-v0 height = e-s if isinstance(c,Color): r = Rect(x,y,width,height,fillColor=c,strokeColor=None) elif isinstance(c,Rect): r = Rect(x,y,width,height) for k in c.__dict__: if k not in ('x','y','width','height'): setattr(r,k,getattr(c,k)) elif isinstance(c,ShadedRect): r = ShadedRect(x=x,y=y,width=width,height=height) for k in c.__dict__: if k not in ('x','y','width','height'): setattr(r,k,getattr(c,k)) G.add(r) v0 = v1 return G class TickLU: '''lookup special cases for tick values''' def __init__(self,*T,**kwds): self.accuracy = kwds.pop('accuracy',1e-8) self.T = T def __contains__(self,t): accuracy = self.accuracy for x,v in self.T: if abs(x-t)<accuracy: return True return False def __getitem__(self,t): accuracy = self.accuracy for x,v in self.T: if abs(x-t)<self.accuracy: return v raise IndexError('cannot locate index %r' % t) class _AxisG(Widget): def _get_line_pos(self,v): v = self.scale(v) try: v = v[0] except: pass return v def _cxLine(self,x,start,end): x = self._get_line_pos(x) return Line(x, self._y + start, x, self._y + end) def _cyLine(self,y,start,end): y = self._get_line_pos(y) return Line(self._x + start, y, self._x + end, y) def _cxLine3d(self,x,start,end,_3d_dx,_3d_dy): x = self._get_line_pos(x) y0 = self._y + start y1 = self._y + end y0, y1 = min(y0,y1),max(y0,y1) x1 = x + _3d_dx return PolyLine([x,y0,x1,y0+_3d_dy,x1,y1+_3d_dy],strokeLineJoin=1) def _cyLine3d(self,y,start,end,_3d_dx,_3d_dy): y = self._get_line_pos(y) x0 = self._x + start x1 = self._x + end x0, x1 = min(x0,x1),max(x0,x1) y1 = y + _3d_dy return PolyLine([x0,y,x0+_3d_dx,y1,x1+_3d_dx,y1],strokeLineJoin=1) def _getLineFunc(self, start, end, parent=None): _3d_dx = getattr(parent,'_3d_dx',None) if _3d_dx is not None: _3d_dy = getattr(parent,'_3d_dy',None) f = self.isYAxis and self._cyLine3d or self._cxLine3d return lambda v, s=start, e=end, f=f,_3d_dx=_3d_dx,_3d_dy=_3d_dy: f(v,s,e,_3d_dx=_3d_dx,_3d_dy=_3d_dy) else: f = self.isYAxis and self._cyLine or self._cxLine return lambda v, s=start, e=end, f=f: f(v,s,e) def _makeLines(self,g,start,end,strokeColor,strokeWidth,strokeDashArray,strokeLineJoin,strokeLineCap,strokeMiterLimit,parent=None,exclude=[],specials={}): func = self._getLineFunc(start,end,parent) if not hasattr(self,'_tickValues'): self._pseudo_configure() if exclude: exf = self.isYAxis and (lambda l: l.y1 in exclude) or (lambda l: l.x1 in exclude) else: exf = None for t in self._tickValues: L = func(t) if exf and exf(L): continue L.strokeColor = strokeColor L.strokeWidth = strokeWidth L.strokeDashArray = strokeDashArray L.strokeLineJoin = strokeLineJoin L.strokeLineCap = strokeLineCap L.strokeMiterLimit = strokeMiterLimit if t in specials: for a,v in specials[t].items(): setattr(L,a,v) g.add(L) def makeGrid(self,g,dim=None,parent=None,exclude=[]): '''this is only called by a container object''' c = self.gridStrokeColor w = self.gridStrokeWidth or 0 if w and c and self.visibleGrid: s = self.gridStart e = self.gridEnd if s is None or e is None: if dim and hasattr(dim,'__call__'): dim = dim() if dim: if s is None: s = dim[0] if e is None: e = dim[1] else: if s is None: s = 0 if e is None: e = 0 if s or e: if self.isYAxis: offs = self._x else: offs = self._y self._makeLines(g,s-offs,e-offs,c,w,self.gridStrokeDashArray,self.gridStrokeLineJoin,self.gridStrokeLineCap,self.gridStrokeMiterLimit,parent=parent,exclude=exclude,specials=getattr(self,'_gridSpecials',{})) self._makeSubGrid(g,dim,parent,exclude=[]) def _makeSubGrid(self,g,dim=None,parent=None,exclude=[]): '''this is only called by a container object''' if not (getattr(self,'visibleSubGrid',0) and self.subTickNum>0): return c = self.subGridStrokeColor w = self.subGridStrokeWidth or 0 if not(w and c): return s = self.subGridStart e = self.subGridEnd if s is None or e is None: if dim and hasattr(dim,'__call__'): dim = dim() if dim: if s is None: s = dim[0] if e is None: e = dim[1] else: if s is None: s = 0 if e is None: e = 0 if s or e: if self.isYAxis: offs = self._x else: offs = self._y otv = self._calcSubTicks() try: self._makeLines(g,s-offs,e-offs,c,w,self.subGridStrokeDashArray,self.subGridStrokeLineJoin,self.subGridStrokeLineCap,self.subGridStrokeMiterLimit,parent=parent,exclude=exclude) finally: self._tickValues = otv def getGridDims(self,start=None,end=None): if start is None: start = (self._x,self._y)[self.isYAxis] if end is None: end = start+self._length return start,end def isYAxis(self): if getattr(self,'_dataIndex',None)==1: return True acn = self.__class__.__name__ return acn[0]=='Y' or acn[:4]=='AdjY' isYAxis = property(isYAxis) def isXAxis(self): if getattr(self,'_dataIndex',None)==0: return True acn = self.__class__.__name__ return acn[0]=='X' or acn[:11]=='NormalDateX' isXAxis = property(isXAxis) def addAnnotations(self,g,A=None): if A is None: getattr(self,'annotations',[]) for x in A: g.add(x(self)) def _splitAnnotations(self): A = getattr(self,'annotations',[])[:] D = {} for v in ('early','beforeAxis','afterAxis','beforeTicks', 'afterTicks','beforeTickLabels', 'afterTickLabels','late'): R = [].append P = [].append for a in A: if getattr(a,v,0): R(a) else: P(a) D[v] = R.__self__ A[:] = P.__self__ D['late'] += A return D def draw(self): g = Group() A = self._splitAnnotations() self.addAnnotations(g,A['early']) if self.visible: self.addAnnotations(g,A['beforeAxis']) g.add(self.makeAxis()) self.addAnnotations(g,A['afterAxis']) self.addAnnotations(g,A['beforeTicks']) g.add(self.makeTicks()) self.addAnnotations(g,A['afterTicks']) self.addAnnotations(g,A['beforeTickLabels']) g.add(self.makeTickLabels()) self.addAnnotations(g,A['afterTickLabels']) self.addAnnotations(g,A['late']) return g class CALabel(PMVLabel): _attrMap = AttrMap(BASE=PMVLabel, labelPosFrac = AttrMapValue(isNumber, desc='where in the category range [0,1] the labels should be anchored'), ) def __init__(self,**kw): PMVLabel.__init__(self,**kw) self._setKeywords( labelPosFrac = 0.5, ) # Category axes. class CategoryAxis(_AxisG): "Abstract category axis, unusable in itself." _nodoc = 1 _attrMap = AttrMap( visible = AttrMapValue(isBoolean, desc='Display entire object, if true.'), visibleAxis = AttrMapValue(isBoolean, desc='Display axis line, if true.'), visibleTicks = AttrMapValue(isBoolean, desc='Display axis ticks, if true.'), visibleLabels = AttrMapValue(isBoolean, desc='Display axis labels, if true.'), visibleGrid = AttrMapValue(isBoolean, desc='Display axis grid, if true.'), strokeWidth = AttrMapValue(isNumber, desc='Width of axis line and ticks.'), strokeColor = AttrMapValue(isColorOrNone, desc='Color of axis line and ticks.'), strokeDashArray = AttrMapValue(isListOfNumbersOrNone, desc='Dash array used for axis line.'), strokeLineCap = AttrMapValue(OneOf(0,1,2),desc="Line cap 0=butt, 1=round & 2=square"), strokeLineJoin = AttrMapValue(OneOf(0,1,2),desc="Line join 0=miter, 1=round & 2=bevel"), strokeMiterLimit = AttrMapValue(isNumber,desc="miter limit control miter line joins"), gridStrokeWidth = AttrMapValue(isNumber, desc='Width of grid lines.'), gridStrokeColor = AttrMapValue(isColorOrNone, desc='Color of grid lines.'), gridStrokeDashArray = AttrMapValue(isListOfNumbersOrNone, desc='Dash array used for grid lines.'), gridStrokeLineCap = AttrMapValue(OneOf(0,1,2),desc="Grid Line cap 0=butt, 1=round & 2=square"), gridStrokeLineJoin = AttrMapValue(OneOf(0,1,2),desc="Grid Line join 0=miter, 1=round & 2=bevel"), gridStrokeMiterLimit = AttrMapValue(isNumber,desc="Grid miter limit control miter line joins"), gridStart = AttrMapValue(isNumberOrNone, desc='Start of grid lines wrt axis origin'), gridEnd = AttrMapValue(isNumberOrNone, desc='End of grid lines wrt axis origin'), drawGridLast = AttrMapValue(isBoolean, desc='if true draw gridlines after everything else.'), labels = AttrMapValue(None, desc='Handle of the axis labels.'), categoryNames = AttrMapValue(isListOfStringsOrNone, desc='List of category names.'), joinAxis = AttrMapValue(None, desc='Join both axes if true.'), joinAxisPos = AttrMapValue(isNumberOrNone, desc='Position at which to join with other axis.'), reverseDirection = AttrMapValue(isBoolean, desc='If true reverse category direction.'), style = AttrMapValue(OneOf('parallel','stacked','parallel_3d'),"How common category bars are plotted"), labelAxisMode = AttrMapValue(OneOf('high','low','axis', 'axispmv'), desc="Like joinAxisMode, but for the axis labels"), tickShift = AttrMapValue(isBoolean, desc='Tick shift typically'), tickStrokeWidth = AttrMapValue(isNumberOrNone, desc='Width of ticks if specified.'), tickStrokeColor = AttrMapValue(isColorOrNone, desc='Color of ticks if specified.'), loPad = AttrMapValue(isNumber, desc='extra inner space before start of the axis'), hiPad = AttrMapValue(isNumber, desc='extra inner space after end of the axis'), annotations = AttrMapValue(None,desc='list of annotations'), loLLen = AttrMapValue(isNumber, desc='extra line length before start of the axis'), hiLLen = AttrMapValue(isNumber, desc='extra line length after end of the axis'), skipGrid = AttrMapValue(OneOf('none','top','both','bottom'),"grid lines to skip top bottom both none"), innerTickDraw = AttrMapValue(isNoneOrCallable, desc="Callable to replace _drawInnerTicks"), ) def __init__(self): assert self.__class__.__name__!='CategoryAxis', "Abstract Class CategoryAxis Instantiated" # private properties set by methods. The initial values # here are to make demos easy; they would always be # overridden in real life. self._x = 50 self._y = 50 self._length = 100 self._catCount = 0 # public properties self.visible = 1 self.visibleAxis = 1 self.visibleTicks = 1 self.visibleLabels = 1 self.visibleGrid = 0 self.drawGridLast = False self.strokeWidth = 1 self.strokeColor = STATE_DEFAULTS['strokeColor'] self.strokeDashArray = STATE_DEFAULTS['strokeDashArray'] self.gridStrokeLineJoin = self.strokeLineJoin = STATE_DEFAULTS['strokeLineJoin'] self.gridStrokeLineCap = self.strokeLineCap = STATE_DEFAULTS['strokeLineCap'] self.gridStrokeMiterLimit = self.strokeMiterLimit = STATE_DEFAULTS['strokeMiterLimit'] self.gridStrokeWidth = 0.25 self.gridStrokeColor = STATE_DEFAULTS['strokeColor'] self.gridStrokeDashArray = STATE_DEFAULTS['strokeDashArray'] self.gridStart = self.gridEnd = None self.strokeLineJoin = STATE_DEFAULTS['strokeLineJoin'] self.strokeLineCap = STATE_DEFAULTS['strokeLineCap'] self.strokeMiterLimit = STATE_DEFAULTS['strokeMiterLimit'] self.labels = TypedPropertyCollection(CALabel) # if None, they don't get labels. If provided, # you need one name per data point and they are # used for label text. self.categoryNames = None self.joinAxis = None self.joinAxisPos = None self.joinAxisMode = None self.labelAxisMode = 'axis' self.reverseDirection = 0 self.style = 'parallel' #various private things which need to be initialized self._labelTextFormat = None self.tickShift = 0 self.loPad = 0 self.hiPad = 0 self.loLLen = 0 self.hiLLen = 0 def setPosition(self, x, y, length): # ensure floating point self._x = float(x) self._y = float(y) self._length = float(length) def configure(self, multiSeries,barWidth=None): self._catCount = max(list(map(len,multiSeries))) self._barWidth = barWidth or ((self._length-self.loPad-self.hiPad)/float(self._catCount or 1)) self._calcTickmarkPositions() if self.labelAxisMode == 'axispmv': self._pmv = [sum([series[i] for series in multiSeries]) for i in xrange(self._catCount)] def _calcTickmarkPositions(self): n = self._catCount if self.tickShift: self._tickValues = [t+0.5 for t in xrange(n)] else: if self.reverseDirection: self._tickValues = list(xrange(-1,n)) else: self._tickValues = list(xrange(n+1)) def _scale(self,idx): if self.reverseDirection: idx = self._catCount-idx-1 return idx def scale(self, idx): "Returns the position and width in drawing units" return (self.loScale(idx), self._barWidth) def midScale(self, idx): "Returns the bar mid position in drawing units" return self.loScale(idx) + 0.5*self._barWidth def _assertYAxis(axis): assert axis.isYAxis, "Cannot connect to other axes (%s), but Y- ones." % axis.__class__.__name__ def _assertXAxis(axis): assert axis.isXAxis, "Cannot connect to other axes (%s), but X- ones." % axis.__class__.__name__ class _XTicks: _tickTweaks = 0 #try 0.25-0.5 @property def actualTickStrokeWidth(self): return getattr(self,'tickStrokeWidth',self.strokeWidth) @property def actualTickStrokeColor(self): return getattr(self,'tickStrokeColor',self.strokeColor) def _drawTicksInner(self,tU,tD,g): itd = getattr(self,'innerTickDraw',None) if itd: itd(self,tU,tD,g) elif tU or tD: sW = self.actualTickStrokeWidth tW = self._tickTweaks if tW: if tU and not tD: tD = tW*sW elif tD and not tU: tU = tW*sW self._makeLines(g,tU,-tD,self.actualTickStrokeColor,sW,self.strokeDashArray,self.strokeLineJoin,self.strokeLineCap,self.strokeMiterLimit) def _drawTicks(self,tU,tD,g=None): g = g or Group() if self.visibleTicks: self._drawTicksInner(tU,tD,g) return g def _drawSubTicks(self,tU,tD,g): if getattr(self,'visibleSubTicks',0) and self.subTickNum>0: otv = self._calcSubTicks() try: self._subTicking = 1 self._drawTicksInner(tU,tD,g) finally: del self._subTicking self._tickValues = otv def makeTicks(self): yold=self._y try: self._y = self._labelAxisPos(getattr(self,'tickAxisMode','axis')) g = self._drawTicks(self.tickUp,self.tickDown) self._drawSubTicks(getattr(self,'subTickHi',0),getattr(self,'subTickLo',0),g) return g finally: self._y = yold def _labelAxisPos(self,mode=None): axis = self.joinAxis if axis: mode = mode or self.labelAxisMode if mode == 'low': return axis._y elif mode == 'high': return axis._y + axis._length return self._y class _YTicks(_XTicks): def _labelAxisPos(self,mode=None): axis = self.joinAxis if axis: mode = mode or self.labelAxisMode if mode == 'low': return axis._x elif mode == 'high': return axis._x + axis._length return self._x def makeTicks(self): xold=self._x try: self._x = self._labelAxisPos(getattr(self,'tickAxisMode','axis')) g = self._drawTicks(self.tickRight,self.tickLeft) self._drawSubTicks(getattr(self,'subTickHi',0),getattr(self,'subTickLo',0),g) return g finally: self._x = xold class XCategoryAxis(_XTicks,CategoryAxis): "X/category axis" _attrMap = AttrMap(BASE=CategoryAxis, tickUp = AttrMapValue(isNumber, desc='Tick length up the axis.'), tickDown = AttrMapValue(isNumber, desc='Tick length down the axis.'), joinAxisMode = AttrMapValue(OneOf('bottom', 'top', 'value', 'points', None), desc="Mode used for connecting axis ('bottom', 'top', 'value', 'points', None)."), ) _dataIndex = 0 def __init__(self): CategoryAxis.__init__(self) self.labels.boxAnchor = 'n' #north - top edge self.labels.dy = -5 # ultra-simple tick marks for now go between categories # and have same line style as axis - need more self.tickUp = 0 # how far into chart does tick go? self.tickDown = 5 # how far below axis does tick go? def demo(self): self.setPosition(30, 70, 140) self.configure([(10,20,30,40,50)]) self.categoryNames = ['One','Two','Three','Four','Five'] # all labels top-centre aligned apart from the last self.labels.boxAnchor = 'n' self.labels[4].boxAnchor = 'e' self.labels[4].angle = 90 d = Drawing(200, 100) d.add(self) return d def joinToAxis(self, yAxis, mode='bottom', pos=None): "Join with y-axis using some mode." _assertYAxis(yAxis) if mode == 'bottom': self._y = yAxis._y elif mode == 'top': self._y = yAxis._y + yAxis._length elif mode == 'value': self._y = yAxis.scale(pos) elif mode == 'points': self._y = pos def _joinToAxis(self): ja = self.joinAxis if ja: jam = self.joinAxisMode if jam in ('bottom', 'top'): self.joinToAxis(ja, mode=jam) elif jam in ('value', 'points'): self.joinToAxis(ja, mode=jam, pos=self.joinAxisPos) def loScale(self, idx): """returns the x position in drawing units""" return self._x + self.loPad + self._scale(idx)*self._barWidth def makeAxis(self): g = Group() self._joinToAxis() if not self.visibleAxis: return g axis = Line(self._x-self.loLLen, self._y, self._x + self._length+self.hiLLen, self._y) axis.strokeColor = self.strokeColor axis.strokeWidth = self.strokeWidth axis.strokeDashArray = self.strokeDashArray g.add(axis) return g def makeTickLabels(self): g = Group() if not self.visibleLabels: return g categoryNames = self.categoryNames if categoryNames is not None: catCount = self._catCount n = len(categoryNames) reverseDirection = self.reverseDirection barWidth = self._barWidth _y = self._labelAxisPos() _x = self._x pmv = self._pmv if self.labelAxisMode=='axispmv' else None for i in xrange(catCount): if reverseDirection: ic = catCount-i-1 else: ic = i if ic>=n: continue label=i-catCount if label in self.labels: label = self.labels[label] else: label = self.labels[i] if pmv: _dy = label.dy v = label._pmv = pmv[ic] if v<0: _dy *= -2 else: _dy = 0 lpf = label.labelPosFrac x = _x + (i+lpf) * barWidth label.setOrigin(x,_y+_dy) label.setText(categoryNames[ic] or '') g.add(label) return g class YCategoryAxis(_YTicks,CategoryAxis): "Y/category axis" _attrMap = AttrMap(BASE=CategoryAxis, tickLeft = AttrMapValue(isNumber, desc='Tick length left of the axis.'), tickRight = AttrMapValue(isNumber, desc='Tick length right of the axis.'), joinAxisMode = AttrMapValue(OneOf(('left', 'right', 'value', 'points', None)), desc="Mode used for connecting axis ('left', 'right', 'value', 'points', None)."), ) _dataIndex = 1 def __init__(self): CategoryAxis.__init__(self) self.labels.boxAnchor = 'e' #east - right edge self.labels.dx = -5 # ultra-simple tick marks for now go between categories # and have same line style as axis - need more self.tickLeft = 5 # how far left of axis does tick go? self.tickRight = 0 # how far right of axis does tick go? def demo(self): self.setPosition(50, 10, 80) self.configure([(10,20,30)]) self.categoryNames = ['One','Two','Three'] # all labels top-centre aligned apart from the last self.labels.boxAnchor = 'e' self.labels[2].boxAnchor = 's' self.labels[2].angle = 90 d = Drawing(200, 100) d.add(self) return d def joinToAxis(self, xAxis, mode='left', pos=None): "Join with x-axis using some mode." _assertXAxis(xAxis) if mode == 'left': self._x = xAxis._x * 1.0 elif mode == 'right': self._x = (xAxis._x + xAxis._length) * 1.0 elif mode == 'value': self._x = xAxis.scale(pos) * 1.0 elif mode == 'points': self._x = pos * 1.0 def _joinToAxis(self): ja = self.joinAxis if ja: jam = self.joinAxisMode if jam in ('left', 'right'): self.joinToAxis(ja, mode=jam) elif jam in ('value', 'points'): self.joinToAxis(ja, mode=jam, pos=self.joinAxisPos) def loScale(self, idx): "Returns the y position in drawing units" return self._y + self._scale(idx)*self._barWidth def makeAxis(self): g = Group() self._joinToAxis() if not self.visibleAxis: return g axis = Line(self._x, self._y-self.loLLen, self._x, self._y + self._length+self.hiLLen) axis.strokeColor = self.strokeColor axis.strokeWidth = self.strokeWidth axis.strokeDashArray = self.strokeDashArray g.add(axis) return g def makeTickLabels(self): g = Group() if not self.visibleLabels: return g categoryNames = self.categoryNames if categoryNames is not None: catCount = self._catCount n = len(categoryNames) reverseDirection = self.reverseDirection barWidth = self._barWidth labels = self.labels _x = self._labelAxisPos() _y = self._y pmv = self._pmv if self.labelAxisMode=='axispmv' else None for i in xrange(catCount): if reverseDirection: ic = catCount-i-1 else: ic = i if ic>=n: continue label=i-catCount if label in self.labels: label = self.labels[label] else: label = self.labels[i] lpf = label.labelPosFrac y = _y + (i+lpf) * barWidth if pmv: _dx = label.dx v = label._pmv = pmv[ic] if v<0: _dx *= -2 else: _dx = 0 label.setOrigin(_x+_dx, y) label.setText(categoryNames[ic] or '') g.add(label) return g class TickLabeller: '''Abstract base class which may be used to indicate a change in the call signature for callable label formats ''' def __call__(self,axis,value): return 'Abstract class instance called' #this matches the old python str behaviour _defaultLabelFormatter = lambda x: '%.12g' % x # Value axes. class ValueAxis(_AxisG): "Abstract value axis, unusable in itself." _attrMap = AttrMap( forceZero = AttrMapValue(EitherOr((isBoolean,OneOf('near'))), desc='Ensure zero in range if true.'), visible = AttrMapValue(isBoolean, desc='Display entire object, if true.'), visibleAxis = AttrMapValue(isBoolean, desc='Display axis line, if true.'), visibleLabels = AttrMapValue(isBoolean, desc='Display axis labels, if true.'), visibleTicks = AttrMapValue(isBoolean, desc='Display axis ticks, if true.'), visibleGrid = AttrMapValue(isBoolean, desc='Display axis grid, if true.'), strokeWidth = AttrMapValue(isNumber, desc='Width of axis line and ticks.'), strokeColor = AttrMapValue(isColorOrNone, desc='Color of axis line and ticks.'), strokeDashArray = AttrMapValue(isListOfNumbersOrNone, desc='Dash array used for axis line.'), strokeLineCap = AttrMapValue(OneOf(0,1,2),desc="Line cap 0=butt, 1=round & 2=square"), strokeLineJoin = AttrMapValue(OneOf(0,1,2),desc="Line join 0=miter, 1=round & 2=bevel"), strokeMiterLimit = AttrMapValue(isNumber,desc="miter limit control miter line joins"), gridStrokeWidth = AttrMapValue(isNumber, desc='Width of grid lines.'), gridStrokeColor = AttrMapValue(isColorOrNone, desc='Color of grid lines.'), gridStrokeDashArray = AttrMapValue(isListOfNumbersOrNone, desc='Dash array used for grid lines.'), gridStrokeLineCap = AttrMapValue(OneOf(0,1,2),desc="Grid Line cap 0=butt, 1=round & 2=square"), gridStrokeLineJoin = AttrMapValue(OneOf(0,1,2),desc="Grid Line join 0=miter, 1=round & 2=bevel"), gridStrokeMiterLimit = AttrMapValue(isNumber,desc="Grid miter limit control miter line joins"), gridStart = AttrMapValue(isNumberOrNone, desc='Start of grid lines wrt axis origin'), gridEnd = AttrMapValue(isNumberOrNone, desc='End of grid lines wrt axis origin'), drawGridLast = AttrMapValue(isBoolean, desc='if true draw gridlines after everything else.'), minimumTickSpacing = AttrMapValue(isNumber, desc='Minimum value for distance between ticks.'), maximumTicks = AttrMapValue(isNumber, desc='Maximum number of ticks.'), labels = AttrMapValue(None, desc='Handle of the axis labels.'), labelAxisMode = AttrMapValue(OneOf('high','low','axis'), desc="Like joinAxisMode, but for the axis labels"), labelTextFormat = AttrMapValue(None, desc='Formatting string or function used for axis labels.'), labelTextPostFormat = AttrMapValue(None, desc='Extra Formatting string.'), labelTextScale = AttrMapValue(isNumberOrNone, desc='Scaling for label tick values.'), valueMin = AttrMapValue(isNumberOrNone, desc='Minimum value on axis.'), valueMax = AttrMapValue(isNumberOrNone, desc='Maximum value on axis.'), valueStep = AttrMapValue(isNumberOrNone, desc='Step size used between ticks.'), valueSteps = AttrMapValue(isListOfNumbersOrNone, desc='List of step sizes used between ticks.'), avoidBoundFrac = AttrMapValue(EitherOr((isNumberOrNone,SequenceOf(isNumber,emptyOK=0,lo=2,hi=2))), desc='Fraction of interval to allow above and below.'), avoidBoundSpace = AttrMapValue(EitherOr((isNumberOrNone,SequenceOf(isNumber,emptyOK=0,lo=2,hi=2))), desc='Space to allow above and below.'), abf_ignore_zero = AttrMapValue(EitherOr((NoneOr(isBoolean),SequenceOf(isBoolean,emptyOK=0,lo=2,hi=2))), desc='Set to True to make the avoidBoundFrac calculations treat zero as non-special'), rangeRound=AttrMapValue(OneOf('none','both','ceiling','floor'),'How to round the axis limits'), zrangePref = AttrMapValue(isNumberOrNone, desc='Zero range axis limit preference.'), style = AttrMapValue(OneOf('normal','stacked','parallel_3d'),"How values are plotted!"), skipEndL = AttrMapValue(OneOf('none','start','end','both'), desc='Skip high/low tick labels'), origShiftIPC = AttrMapValue(isNumberOrNone, desc='Lowest label shift interval ratio.'), origShiftMin = AttrMapValue(isNumberOrNone, desc='Minimum amount to shift.'), origShiftSpecialValue = AttrMapValue(isNumberOrNone, desc='special value for shift'), tickAxisMode = AttrMapValue(OneOf('high','low','axis'), desc="Like joinAxisMode, but for the ticks"), reverseDirection = AttrMapValue(isBoolean, desc='If true reverse category direction.'), annotations = AttrMapValue(None,desc='list of annotations'), loLLen = AttrMapValue(isNumber, desc='extra line length before start of the axis'), hiLLen = AttrMapValue(isNumber, desc='extra line length after end of the axis'), subTickNum = AttrMapValue(isNumber, desc='Number of axis sub ticks, if >0'), subTickLo = AttrMapValue(isNumber, desc='sub tick down or left'), subTickHi = AttrMapValue(isNumber, desc='sub tick up or right'), visibleSubTicks = AttrMapValue(isBoolean, desc='Display axis sub ticks, if true.'), visibleSubGrid = AttrMapValue(isBoolean, desc='Display axis sub grid, if true.'), subGridStrokeWidth = AttrMapValue(isNumber, desc='Width of grid lines.'), subGridStrokeColor = AttrMapValue(isColorOrNone, desc='Color of grid lines.'), subGridStrokeDashArray = AttrMapValue(isListOfNumbersOrNone, desc='Dash array used for grid lines.'), subGridStrokeLineCap = AttrMapValue(OneOf(0,1,2),desc="Grid Line cap 0=butt, 1=round & 2=square"), subGridStrokeLineJoin = AttrMapValue(OneOf(0,1,2),desc="Grid Line join 0=miter, 1=round & 2=bevel"), subGridStrokeMiterLimit = AttrMapValue(isNumber,desc="Grid miter limit control miter line joins"), subGridStart = AttrMapValue(isNumberOrNone, desc='Start of grid lines wrt axis origin'), subGridEnd = AttrMapValue(isNumberOrNone, desc='End of grid lines wrt axis origin'), tickStrokeWidth = AttrMapValue(isNumber, desc='Width of ticks if specified.'), subTickStrokeWidth = AttrMapValue(isNumber, desc='Width of sub ticks if specified.'), subTickStrokeColor = AttrMapValue(isColorOrNone, desc='Color of sub ticks if specified.'), tickStrokeColor = AttrMapValue(isColorOrNone, desc='Color of ticks if specified.'), keepTickLabelsInside = AttrMapValue(isBoolean, desc='Ensure tick labels do not project beyond bounds of axis if true'), skipGrid = AttrMapValue(OneOf('none','top','both','bottom'),"grid lines to skip top bottom both none"), requiredRange = AttrMapValue(isNumberOrNone, desc='Minimum required value range.'), innerTickDraw = AttrMapValue(isNoneOrCallable, desc="Callable to replace _drawInnerTicks"), ) def __init__(self,**kw): assert self.__class__.__name__!='ValueAxis', 'Abstract Class ValueAxis Instantiated' self._setKeywords(**kw) self._setKeywords( _configured = 0, # private properties set by methods. The initial values # here are to make demos easy; they would always be # overridden in real life. _x = 50, _y = 50, _length = 100, # public properties visible = 1, visibleAxis = 1, visibleLabels = 1, visibleTicks = 1, visibleGrid = 0, forceZero = 0, strokeWidth = 1, strokeColor = STATE_DEFAULTS['strokeColor'], strokeDashArray = STATE_DEFAULTS['strokeDashArray'], strokeLineJoin = STATE_DEFAULTS['strokeLineJoin'], strokeLineCap = STATE_DEFAULTS['strokeLineCap'], strokeMiterLimit = STATE_DEFAULTS['strokeMiterLimit'], gridStrokeWidth = 0.25, gridStrokeColor = STATE_DEFAULTS['strokeColor'], gridStrokeDashArray = STATE_DEFAULTS['strokeDashArray'], gridStrokeLineJoin = STATE_DEFAULTS['strokeLineJoin'], gridStrokeLineCap = STATE_DEFAULTS['strokeLineCap'], gridStrokeMiterLimit = STATE_DEFAULTS['strokeMiterLimit'], gridStart = None, gridEnd = None, drawGridLast = False, visibleSubGrid = 0, visibleSubTicks = 0, subTickNum = 0, subTickLo = 0, subTickHi = 0, subGridStrokeLineJoin = STATE_DEFAULTS['strokeLineJoin'], subGridStrokeLineCap = STATE_DEFAULTS['strokeLineCap'], subGridStrokeMiterLimit = STATE_DEFAULTS['strokeMiterLimit'], subGridStrokeWidth = 0.25, subGridStrokeColor = STATE_DEFAULTS['strokeColor'], subGridStrokeDashArray = STATE_DEFAULTS['strokeDashArray'], subGridStart = None, subGridEnd = None, labels = TypedPropertyCollection(Label), keepTickLabelsInside = 0, # how close can the ticks be? minimumTickSpacing = 10, maximumTicks = 7, # a format string like '%0.2f' # or a function which takes the value as an argument and returns a string _labelTextFormat = None, labelAxisMode = 'axis', labelTextFormat = None, labelTextPostFormat = None, labelTextScale = None, # if set to None, these will be worked out for you. # if you override any or all of them, your values # will be used. valueMin = None, valueMax = None, valueStep = None, avoidBoundFrac = None, avoidBoundSpace = None, abf_ignore_zero = False, rangeRound = 'none', zrangePref = 0, style = 'normal', skipEndL='none', origShiftIPC = None, origShiftMin = None, origShiftSpecialValue = None, tickAxisMode = 'axis', reverseDirection=0, loLLen=0, hiLLen=0, requiredRange=0, ) self.labels.angle = 0 def setPosition(self, x, y, length): # ensure floating point self._x = float(x) self._y = float(y) self._length = float(length) def configure(self, dataSeries): """Let the axis configure its scale and range based on the data. Called after setPosition. Let it look at a list of lists of numbers determine the tick mark intervals. If valueMin, valueMax and valueStep are configured then it will use them; if any of them are set to None it will look at the data and make some sensible decision. You may override this to build custom axes with irregular intervals. It creates an internal variable self._values, which is a list of numbers to use in plotting. """ self._setRange(dataSeries) self._configure_end() def _configure_end(self): self._calcTickmarkPositions() self._calcScaleFactor() self._configured = 1 def _getValueStepAndTicks(self, valueMin, valueMax,cache={}): try: K = (valueMin,valueMax) r = cache[K] except: self._valueMin = valueMin self._valueMax = valueMax valueStep,T = self._calcStepAndTickPositions() r = cache[K] = valueStep, T, valueStep*1e-8 return r def _preRangeAdjust(self,valueMin,valueMax): rr = self.requiredRange if rr>0: r = valueMax - valueMin if r<rr: m = 0.5*(valueMax+valueMin) rr *= 0.5 y1 = min(m-rr,valueMin) y2 = max(m+rr,valueMax) if valueMin>=100 and y1<100: y2 = y2 + 100 - y1 y1 = 100 elif valueMin>=0 and y1<0: y2 = y2 - y1 y1 = 0 valueMin = self._cValueMin = y1 valueMax = self._cValueMax = y2 return valueMin,valueMax def _setRange(self, dataSeries): """Set minimum and maximum axis values. The dataSeries argument is assumed to be a list of data vectors. Each vector is itself a list or tuple of numbers. Returns a min, max tuple. """ oMin = valueMin = self.valueMin oMax = valueMax = self.valueMax if valueMin is None: valueMin = self._cValueMin = _findMin(dataSeries,self._dataIndex,0) if valueMax is None: valueMax = self._cValueMax = _findMax(dataSeries,self._dataIndex,0) if valueMin == valueMax: if valueMax==0: if oMin is None and oMax is None: zrp = getattr(self,'zrangePref',0) if zrp>0: valueMax = zrp valueMin = 0 elif zrp<0: valueMax = 0 valueMin = zrp else: valueMax = 0.01 valueMin = -0.01 elif self.valueMin is None: valueMin = -0.01 else: valueMax = 0.01 else: if valueMax>0: valueMax = 1.2*valueMax valueMin = 0.0 else: valueMax = 0.0 valueMin = 1.2*valueMin if getattr(self,'_bubblePlot',None): bubbleMax = float(_findMax(dataSeries,2,0)) frac=.25 bubbleV=frac*(valueMax-valueMin) self._bubbleV = bubbleV self._bubbleMax = bubbleMax self._bubbleRadius = frac*self._length def special(T,x,func,bubbleV=bubbleV,bubbleMax=bubbleMax): try: v = T[2] except IndexError: v = bubbleMAx*0.1 bubbleV *= (v/bubbleMax)**0.5 return func(T[x]+bubbleV,T[x]-bubbleV) if oMin is None: valueMin = self._cValueMin = _findMin(dataSeries,self._dataIndex,0,special=special) if oMax is None: valueMax = self._cValueMax = _findMax(dataSeries,self._dataIndex,0,special=special) valueMin, valueMax = self._preRangeAdjust(valueMin,valueMax) rangeRound = self.rangeRound cMin = valueMin cMax = valueMax forceZero = self.forceZero if forceZero: if forceZero=='near': forceZero = min(abs(valueMin),abs(valueMax)) <= 5*(valueMax-valueMin) if forceZero: if valueMax<0: valueMax=0 elif valueMin>0: valueMin = 0 abf = self.avoidBoundFrac do_rr = not getattr(self,'valueSteps',None) do_abf = abf and do_rr if not isSeq(abf): abf = abf, abf abfiz = getattr(self,'abf_ignore_zero', False) if not isSeq(abfiz): abfiz = abfiz, abfiz do_rr = rangeRound != 'none' and do_rr if do_rr: rrn = rangeRound in ['both','floor'] rrx = rangeRound in ['both','ceiling'] else: rrn = rrx = 0 abS = self.avoidBoundSpace do_abs = abS if do_abs: if not isSeq(abS): abS = abS, abS aL = float(self._length) go = do_rr or do_abf or do_abs cache = {} iter = 0 while go and iter<=10: iter += 1 go = 0 if do_abf or do_abs: valueStep, T, fuzz = self._getValueStepAndTicks(valueMin, valueMax, cache) if do_abf: i0 = valueStep*abf[0] i1 = valueStep*abf[1] else: i0 = i1 = 0 if do_abs: sf = (valueMax-valueMin)/aL i0 = max(i0,abS[0]*sf) i1 = max(i1,abS[1]*sf) if rrn: v = T[0] else: v = valueMin u = cMin-i0 if (abfiz[0] or abs(v)>fuzz) and v>=u+fuzz: valueMin = u go = 1 if rrx: v = T[-1] else: v = valueMax u = cMax+i1 if (abfiz[1] or abs(v)>fuzz) and v<=u-fuzz: valueMax = u go = 1 if do_rr: valueStep, T, fuzz = self._getValueStepAndTicks(valueMin, valueMax, cache) if rrn: if valueMin<T[0]-fuzz: valueMin = T[0]-valueStep go = 1 else: go = valueMin>=T[0]+fuzz valueMin = T[0] if rrx: if valueMax>T[-1]+fuzz: valueMax = T[-1]+valueStep go = 1 else: go = valueMax<=T[-1]-fuzz valueMax = T[-1] if iter and not go: self._computedValueStep = valueStep else: self._computedValueStep = None self._valueMin = valueMin self._valueMax = valueMax origShiftIPC = self.origShiftIPC origShiftMin = self.origShiftMin if origShiftMin is not None or origShiftIPC is not None: origShiftSpecialValue = self.origShiftSpecialValue self._calcValueStep() valueMax, valueMin = self._valueMax, self._valueMin if origShiftSpecialValue is None or abs(origShiftSpecialValue-valueMin)<1e-6: if origShiftIPC: m = origShiftIPC*self._valueStep else: m = 0 if origShiftMin: m = max(m,(valueMax-valueMin)*origShiftMin/self._length) self._valueMin -= m self._rangeAdjust() def _pseudo_configure(self): self._valueMin = self.valueMin self._valueMax = self.valueMax if hasattr(self,'_subTickValues'): del self._subTickValues self._configure_end() def _rangeAdjust(self): """Override this if you want to alter the calculated range. E.g. if want a minumamum range of 30% or don't want 100% as the first point. """ pass def _adjustAxisTicks(self): '''Override if you want to put slack at the ends of the axis eg if you don't want the last tick to be at the bottom etc ''' pass def _calcScaleFactor(self): """Calculate the axis' scale factor. This should be called only *after* the axis' range is set. Returns a number. """ self._scaleFactor = self._length / float(self._valueMax - self._valueMin) return self._scaleFactor def _calcStepAndTickPositions(self): valueStep = getattr(self,'_computedValueStep',None) if valueStep: del self._computedValueStep self._valueStep = valueStep else: self._calcValueStep() valueStep = self._valueStep valueMin = self._valueMin valueMax = self._valueMax fuzz = 1e-8*valueStep rangeRound = self.rangeRound i0 = int(float(valueMin)/valueStep) v = i0*valueStep if rangeRound in ('both','floor'): if v>valueMin+fuzz: i0 -= 1 elif v<valueMin-fuzz: i0 += 1 i1 = int(float(valueMax)/valueStep) v = i1*valueStep if rangeRound in ('both','ceiling'): if v<valueMax-fuzz: i1 += 1 elif v>valueMax+fuzz: i1 -= 1 return valueStep,[i*valueStep for i in xrange(i0,i1+1)] def _calcTickPositions(self): return self._calcStepAndTickPositions()[1] def _calcSubTicks(self): if not hasattr(self,'_tickValues'): self._pseudo_configure() otv = self._tickValues if not hasattr(self,'_subTickValues'): acn = self.__class__.__name__ if acn[:11]=='NormalDateX': iFuzz = 0 dCnv = int else: iFuzz = 1e-8 dCnv = lambda x:x OTV = [tv for tv in otv if getattr(tv,'_doSubTicks',1)] T = [].append nst = int(self.subTickNum) i = len(OTV) if i<2: self._subTickValues = [] else: if i==2: dst = OTV[1]-OTV[0] elif i==3: dst = max(OTV[1]-OTV[0],OTV[2]-OTV[1]) else: i >>= 1 dst = OTV[i+1] - OTV[i] fuzz = dst*iFuzz vn = self._valueMin+fuzz vx = self._valueMax-fuzz if OTV[0]>vn: OTV.insert(0,OTV[0]-dst) if OTV[-1]<vx: OTV.append(OTV[-1]+dst) dst /= float(nst+1) for i,x in enumerate(OTV[:-1]): for j in xrange(nst): t = x+dCnv((j+1)*dst) if t<=vn or t>=vx: continue T(t) self._subTickValues = T.__self__ self._tickValues = self._subTickValues return otv def _calcTickmarkPositions(self): """Calculate a list of tick positions on the axis. Returns a list of numbers.""" self._tickValues = getattr(self,'valueSteps',None) if self._tickValues: return self._tickValues self._tickValues = self._calcTickPositions() self._adjustAxisTicks() return self._tickValues def _calcValueStep(self): '''Calculate _valueStep for the axis or get from valueStep.''' if self.valueStep is None: rawRange = self._valueMax - self._valueMin rawInterval = rawRange / min(float(self.maximumTicks-1),(float(self._length)/self.minimumTickSpacing)) self._valueStep = nextRoundNumber(rawInterval) else: self._valueStep = self.valueStep def _allIntTicks(self): return _allInt(self._tickValues) def makeTickLabels(self): g = Group() if not self.visibleLabels: return g f = self._labelTextFormat # perhaps someone already set it if f is None: f = self.labelTextFormat or (self._allIntTicks() and '%.0f' or _defaultLabelFormatter) elif f is str and self._allIntTicks(): f = '%.0f' elif hasattr(f,'calcPlaces'): f.calcPlaces(self._tickValues) post = self.labelTextPostFormat scl = self.labelTextScale pos = [self._x, self._y] d = self._dataIndex pos[1-d] = self._labelAxisPos() labels = self.labels if self.skipEndL!='none': if self.isXAxis: sk = self._x else: sk = self._y if self.skipEndL=='start': sk = [sk] else: sk = [sk,sk+self._length] if self.skipEndL=='end': del sk[0] else: sk = [] nticks = len(self._tickValues) nticks1 = nticks - 1 for i,tick in enumerate(self._tickValues): label = i-nticks if label in labels: label = labels[label] else: label = labels[i] if f and label.visible: v = self.scale(tick) if sk: for skv in sk: if abs(skv-v)<1e-6: v = None break if v is not None: if scl is not None: t = tick*scl else: t = tick if isinstance(f, str): txt = f % t elif isSeq(f): #it's a list, use as many items as we get if i < len(f): txt = f[i] else: txt = '' elif hasattr(f,'__call__'): if isinstance(f,TickLabeller): txt = f(self,t) else: txt = f(t) else: raise ValueError('Invalid labelTextFormat %s' % f) if post: txt = post % txt pos[d] = v label.setOrigin(*pos) label.setText(txt) #special property to ensure a label doesn't project beyond the bounds of an x-axis if self.keepTickLabelsInside: if isinstance(self, XValueAxis): #not done yet for y axes a_x = self._x if not i: #first one x0, y0, x1, y1 = label.getBounds() if x0 < a_x: label = label.clone(dx=label.dx + a_x - x0) if i==nticks1: #final one a_x1 = a_x +self._length x0, y0, x1, y1 = label.getBounds() if x1 > a_x1: label=label.clone(dx=label.dx-x1+a_x1) g.add(label) return g def scale(self, value): """Converts a numeric value to a plotarea position. The chart first configures the axis, then asks it to """ assert self._configured, "Axis cannot scale numbers before it is configured" if value is None: value = 0 #this could be made more efficient by moving the definition of org and sf into the configuration org = (self._x, self._y)[self._dataIndex] sf = self._scaleFactor if self.reverseDirection: sf = -sf org += self._length return org + sf*(value - self._valueMin) class XValueAxis(_XTicks,ValueAxis): "X/value axis" _attrMap = AttrMap(BASE=ValueAxis, tickUp = AttrMapValue(isNumber, desc='Tick length up the axis.'), tickDown = AttrMapValue(isNumber, desc='Tick length down the axis.'), joinAxis = AttrMapValue(None, desc='Join both axes if true.'), joinAxisMode = AttrMapValue(OneOf('bottom', 'top', 'value', 'points', None), desc="Mode used for connecting axis ('bottom', 'top', 'value', 'points', None)."), joinAxisPos = AttrMapValue(isNumberOrNone, desc='Position at which to join with other axis.'), ) # Indicate the dimension of the data we're interested in. _dataIndex = 0 def __init__(self,**kw): ValueAxis.__init__(self,**kw) self.labels.boxAnchor = 'n' self.labels.dx = 0 self.labels.dy = -5 self.tickUp = 0 self.tickDown = 5 self.joinAxis = None self.joinAxisMode = None self.joinAxisPos = None def demo(self): self.setPosition(20, 50, 150) self.configure([(10,20,30,40,50)]) d = Drawing(200, 100) d.add(self) return d def joinToAxis(self, yAxis, mode='bottom', pos=None): "Join with y-axis using some mode." _assertYAxis(yAxis) if mode == 'bottom': self._y = yAxis._y * 1.0 elif mode == 'top': self._y = (yAxis._y + yAxis._length) * 1.0 elif mode == 'value': self._y = yAxis.scale(pos) * 1.0 elif mode == 'points': self._y = pos * 1.0 def _joinToAxis(self): ja = self.joinAxis if ja: jam = self.joinAxisMode or 'bottom' if jam in ('bottom', 'top'): self.joinToAxis(ja, mode=jam) elif jam in ('value', 'points'): self.joinToAxis(ja, mode=jam, pos=self.joinAxisPos) def makeAxis(self): g = Group() self._joinToAxis() if not self.visibleAxis: return g axis = Line(self._x-self.loLLen, self._y, self._x + self._length+self.hiLLen, self._y) axis.strokeColor = self.strokeColor axis.strokeWidth = self.strokeWidth axis.strokeDashArray = self.strokeDashArray g.add(axis) return g #additional utilities to help specify calendar dates on which tick marks #are to be plotted. After some thought, when the magic algorithm fails, #we can let them specify a number of days-of-the-year to tick in any given #year. ################################################################################# # # Preliminary support objects/functions for the axis used in time series charts # ################################################################################# _months = ['jan','feb','mar','apr','may','jun','jul','aug','sep','oct','nov','dec'] _maxDays = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31] def parseDayAndMonth(dmstr): """This accepts and validates strings like "31-Dec" i.e. dates of no particular year. 29 Feb is allowed. These can be used for recurring dates. It returns a (dd, mm) pair where mm is the month integer. If the text is not valid it raises an error. """ dstr, mstr = dmstr.split('-') dd = int(dstr) mstr = mstr.lower() mm = _months.index(mstr) + 1 assert dd <= _maxDays[mm-1] return (dd, mm) class _isListOfDaysAndMonths(Validator): """This accepts and validates lists of strings like "31-Dec" i.e. dates of no particular year. 29 Feb is allowed. These can be used for recurring dates. """ def test(self,x): if isSeq(x): answer = True for element in x: try: dd, mm = parseDayAndMonth(element) except: answer = False return answer else: return False def normalize(self,x): #we store them as presented, it's the most presentable way return x isListOfDaysAndMonths = _isListOfDaysAndMonths() _NDINTM = 1,2,3,6,12,24,60,120,180,240,300,360,420,480,540,600,720,840,960,1080,1200,2400 class NormalDateXValueAxis(XValueAxis): """An X axis applying additional rules. Depending on the data and some built-in rules, the axis displays normalDate values as nicely formatted dates. The client chart should have NormalDate X values. """ _attrMap = AttrMap(BASE = XValueAxis, bottomAxisLabelSlack = AttrMapValue(isNumber, desc="Fractional amount used to adjust label spacing"), niceMonth = AttrMapValue(isBoolean, desc="Flag for displaying months 'nicely'."), forceEndDate = AttrMapValue(isBoolean, desc='Flag for enforced displaying of last date value.'), forceFirstDate = AttrMapValue(isBoolean, desc='Flag for enforced displaying of first date value.'), forceDatesEachYear = AttrMapValue(isListOfDaysAndMonths, desc='List of dates in format "31-Dec",' + '"1-Jan". If present they will always be used for tick marks in the current year, rather ' + 'than the dates chosen by the automatic algorithm. Hyphen compulsory, case of month optional.'), xLabelFormat = AttrMapValue(None, desc="Label format string (e.g. '{mm}/{yy}') or function."), dayOfWeekName = AttrMapValue(SequenceOf(isString,emptyOK=0,lo=7,hi=7), desc='Weekday names.'), monthName = AttrMapValue(SequenceOf(isString,emptyOK=0,lo=12,hi=12), desc='Month names.'), dailyFreq = AttrMapValue(isBoolean, desc='True if we are to assume daily data to be ticked at end of month.'), specifiedTickDates = AttrMapValue(NoneOr(SequenceOf(isNormalDate)), desc='Actual tick values to use; no calculations done'), specialTickClear = AttrMapValue(isBoolean, desc='clear rather than delete close ticks when forced first/end dates'), skipGrid = AttrMapValue(OneOf('none','top','both','bottom'),"grid lines to skip top bottom both none"), ) _valueClass = normalDate.ND def __init__(self,**kw): XValueAxis.__init__(self,**kw) # some global variables still used... self.bottomAxisLabelSlack = 0.1 self.niceMonth = 1 self.forceEndDate = 0 self.forceFirstDate = 0 self.forceDatesEachYear = [] self.dailyFreq = 0 self.xLabelFormat = "{mm}/{yy}" self.dayOfWeekName = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'] self.monthName = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] self.specialTickClear = 0 self.valueSteps = self.specifiedTickDates = None def _scalar2ND(self, x): "Convert a scalar to a NormalDate value." d = self._valueClass() d.normalize(x) return d def _dateFormatter(self, v): "Create a formatted label for some value." if not isinstance(v,normalDate.NormalDate): v = self._scalar2ND(v) d, m = normalDate._dayOfWeekName, normalDate._monthName try: normalDate._dayOfWeekName, normalDate._monthName = self.dayOfWeekName, self.monthName return v.formatMS(self.xLabelFormat) finally: normalDate._dayOfWeekName, normalDate._monthName = d, m def _xAxisTicker(self, xVals): """Complex stuff... Needs explanation... Yes please says Andy :-(. Modified on 19 June 2006 to attempt to allow a mode where one can specify recurring days and months. """ VC = self._valueClass axisLength = self._length formatter = self._dateFormatter if isinstance(formatter,TickLabeller): def formatter(tick): return self._dateFormatter(self,tick) firstDate = xVals[0] if not self.valueMin else VC(self.valueMin) endDate = xVals[-1] if not self.valueMax else VC(self.valueMax) labels = self.labels fontName, fontSize, leading = labels.fontName, labels.fontSize, labels.leading textAnchor, boxAnchor, angle = labels.textAnchor, labels.boxAnchor, labels.angle RBL = _textBoxLimits(formatter(firstDate).split('\n'),fontName, fontSize,leading or 1.2*fontSize,textAnchor,boxAnchor) RBL = _rotatedBoxLimits(RBL[0],RBL[1],RBL[2],RBL[3], angle) xLabelW = RBL[1]-RBL[0] xLabelH = RBL[3]-RBL[2] w = max(xLabelW,labels.width or 0,self.minimumTickSpacing) W = w+w*self.bottomAxisLabelSlack ticks = [] labels = [] maximumTicks = self.maximumTicks if self.specifiedTickDates: ticks = [VC(x) for x in self.specifiedTickDates] labels = [formatter(d) for d in ticks] if self.forceFirstDate and firstDate==ticks[0] and (axisLength/float(ticks[-1]-ticks[0]))*(ticks[1]-ticks[0])<=W: if self.specialTickClear: labels[1] = '' else: del ticks[1], labels[1] if self.forceEndDate and endDate==ticks[-1] and (axisLength/float(ticks[-1]-ticks[0]))*(ticks[-1]-ticks[-2])<=W: if self.specialTickClear: labels[-2] = '' else: del ticks[-2], labels[-2] return ticks, labels #AR 20060619 - first we try the approach where the user has explicitly #specified the days of year to be ticked. Other explicit routes may #be added. if self.forceDatesEachYear: forcedPartialDates = list(map(parseDayAndMonth, self.forceDatesEachYear)) #generate the list of dates in the range. #print 'dates range from %s to %s' % (firstDate, endDate) firstYear = firstDate.year() lastYear = endDate.year() ticks = [] labels = [] yyyy = firstYear #generate all forced dates between the year it starts and the year it #ends, adding them if within range. while yyyy <= lastYear: for (dd, mm) in forcedPartialDates: theDate = normalDate.ND((yyyy, mm, dd)) if theDate >= firstDate and theDate <= endDate: ticks.append(theDate) labels.append(formatter(theDate)) yyyy += 1 #first and last may still be forced in. if self.forceFirstDate and firstDate!=ticks[0]: ticks.insert(0, firstDate) labels.insert(0,formatter(firstDate)) if (axisLength/float(ticks[-1]-ticks[0]))*(ticks[1]-ticks[0])<=W: if self.specialTickClear: labels[1] = '' else: del ticks[1], labels[1] if self.forceEndDate and endDate!=ticks[-1]: ticks.append(endDate) labels.append(formatter(endDate)) if (axisLength/float(ticks[-1]-ticks[0]))*(ticks[-1]-ticks[-2])<=W: if self.specialTickClear: labels[-2] = '' else: del ticks[-2], labels[-2] #print 'xVals found on forced dates =', ticks return ticks, labels def addTick(i, xVals=xVals, formatter=formatter, ticks=ticks, labels=labels): ticks.insert(0,xVals[i]) labels.insert(0,formatter(xVals[i])) n = len(xVals) #otherwise, we apply the 'magic algorithm...' which looks for nice spacing #based on the size and separation of the labels. for d in _NDINTM: k = n/d if k<=maximumTicks and k*W <= axisLength: i = n-1 if self.niceMonth: j = endDate.month() % (d<=12 and d or 12) if j: if self.forceEndDate: addTick(i) ticks[0]._doSubTicks=0 i -= j #weird first date ie not at end of month try: wfd = firstDate.month() == xVals[1].month() except: wfd = 0 while i>=wfd: addTick(i) i -= d if self.forceFirstDate and ticks[0]!=firstDate: addTick(0) ticks[0]._doSubTicks=0 if (axisLength/float(ticks[-1]-ticks[0]))*(ticks[1]-ticks[0])<=W: if self.specialTickClear: labels[1] = '' else: del ticks[1], labels[1] if self.forceEndDate and self.niceMonth and j: if (axisLength/float(ticks[-1]-ticks[0]))*(ticks[-1]-ticks[-2])<=W: if self.specialTickClear: labels[-2] = '' else: del ticks[-2], labels[-2] try: if labels[0] and labels[0]==labels[1]: del ticks[1], labels[1] except IndexError: pass return ticks, labels raise ValueError('Problem selecting NormalDate value axis tick positions') def _convertXV(self,data): '''Convert all XValues to a standard normalDate type''' VC = self._valueClass for D in data: for i in xrange(len(D)): x, y = D[i] if not isinstance(x,VC): D[i] = (VC(x),y) def _getStepsAndLabels(self,xVals): if self.dailyFreq: xEOM = [] pm = 0 px = xVals[0] for x in xVals: m = x.month() if pm!=m: if pm: xEOM.append(px) pm = m px = x px = xVals[-1] if xEOM[-1]!=x: xEOM.append(px) steps, labels = self._xAxisTicker(xEOM) else: steps, labels = self._xAxisTicker(xVals) return steps, labels def configure(self, data): self._convertXV(data) xVals = set() for x in data: for dv in x: xVals.add(dv[0]) xVals = list(xVals) xVals.sort() VC = self._valueClass steps,labels = self._getStepsAndLabels(xVals) valueMin, valueMax = self.valueMin, self.valueMax valueMin = xVals[0] if valueMin is None else VC(valueMin) valueMax = xVals[-1] if valueMax is None else VC(valueMax) self._valueMin, self._valueMax = valueMin, valueMax self._tickValues = steps self._labelTextFormat = labels self._scaleFactor = self._length / float(valueMax - valueMin) self._tickValues = steps self._configured = 1 class YValueAxis(_YTicks,ValueAxis): "Y/value axis" _attrMap = AttrMap(BASE=ValueAxis, tickLeft = AttrMapValue(isNumber, desc='Tick length left of the axis.'), tickRight = AttrMapValue(isNumber, desc='Tick length right of the axis.'), joinAxis = AttrMapValue(None, desc='Join both axes if true.'), joinAxisMode = AttrMapValue(OneOf(('left', 'right', 'value', 'points', None)), desc="Mode used for connecting axis ('left', 'right', 'value', 'points', None)."), joinAxisPos = AttrMapValue(isNumberOrNone, desc='Position at which to join with other axis.'), ) # Indicate the dimension of the data we're interested in. _dataIndex = 1 def __init__(self): ValueAxis.__init__(self) self.labels.boxAnchor = 'e' self.labels.dx = -5 self.labels.dy = 0 self.tickRight = 0 self.tickLeft = 5 self.joinAxis = None self.joinAxisMode = None self.joinAxisPos = None def demo(self): data = [(10, 20, 30, 42)] self.setPosition(100, 10, 80) self.configure(data) drawing = Drawing(200, 100) drawing.add(self) return drawing def joinToAxis(self, xAxis, mode='left', pos=None): "Join with x-axis using some mode." _assertXAxis(xAxis) if mode == 'left': self._x = xAxis._x * 1.0 elif mode == 'right': self._x = (xAxis._x + xAxis._length) * 1.0 elif mode == 'value': self._x = xAxis.scale(pos) * 1.0 elif mode == 'points': self._x = pos * 1.0 def _joinToAxis(self): ja = self.joinAxis if ja: jam = self.joinAxisMode if jam in ('left', 'right'): self.joinToAxis(ja, mode=jam) elif jam in ('value', 'points'): self.joinToAxis(ja, mode=jam, pos=self.joinAxisPos) def makeAxis(self): g = Group() self._joinToAxis() if not self.visibleAxis: return g axis = Line(self._x, self._y-self.loLLen, self._x, self._y + self._length+self.hiLLen) axis.strokeColor = self.strokeColor axis.strokeWidth = self.strokeWidth axis.strokeDashArray = self.strokeDashArray g.add(axis) return g class TimeValueAxis: _mc = 60 _hc = 60*_mc _dc = 24*_hc def __init__(self,*args,**kwds): if not self.labelTextFormat: self.labelTextFormat = self.timeLabelTextFormatter self._saved_tickInfo = {} def _calcValueStep(self): '''Calculate _valueStep for the axis or get from valueStep.''' if self.valueStep is None: rawRange = self._valueMax - self._valueMin rawInterval = rawRange / min(float(self.maximumTicks-1),(float(self._length)/self.minimumTickSpacing)) #here's where we try to choose the correct value for the unit if rawInterval >= self._dc: d = self._dc self._unit = 'days' elif rawInterval >= self._hc: d = self._hc self._unit = 'hours' elif rawInterval >= self._mc: d = self._mc self._unit = 'minutes' else: d = 1 self._unit = 'seconds' self._unitd = d if d>1: rawInterval = int(rawInterval/d) self._valueStep = nextRoundNumber(rawInterval) * d else: self._valueStep = self.valueStep def timeLabelTextFormatter(self,val): u = self._unitd k = (u,tuple(self._tickValues)) if k in self._saved_tickInfo: fmt = self._saved_tickInfo[k] else: uf = float(u) tv = [v/uf for v in self._tickValues] s = self._unit[0] if _allInt(tv): fmt = lambda x, uf=uf, s=s: '%.0f%s' % (x/uf,s) else: stv = ['%.10f' % v for v in tv] stvl = max((len(v.rstrip('0'))-v.index('.')-1) for v in stv) if u==1: fmt = lambda x,uf=uf,fmt='%%.%dfs' % stvl: fmt % (x/uf) else: #see if we can represent fractions fm = 24 if u==self._dc else 60 fv = [(v - int(v))*fm for v in tv] if _allInt(fv): s1 = 'h' if u==self._dc else ('m' if u==self._mc else 's') fmt = lambda x,uf=uf,fm=fm, fmt='%%d%s%%d%%s' % (s,s1): fmt % (int(x/uf),int((x/uf - int(x/uf))*fm)) else: fmt = lambda x,uf=uf,fmt='%%.%df%s' % (stvl,s): fmt % (x/uf) self._saved_tickInfo[k] = fmt return fmt(val) class XTimeValueAxis(TimeValueAxis,XValueAxis): def __init__(self,*args,**kwds): XValueAxis.__init__(self,*args,**kwds) TimeValueAxis.__init__(self,*args,**kwds) class AdjYValueAxis(YValueAxis): """A Y-axis applying additional rules. Depending on the data and some built-in rules, the axis may choose to adjust its range and origin. """ _attrMap = AttrMap(BASE = YValueAxis, leftAxisPercent = AttrMapValue(isBoolean, desc='When true add percent sign to label values.'), leftAxisOrigShiftIPC = AttrMapValue(isNumber, desc='Lowest label shift interval ratio.'), leftAxisOrigShiftMin = AttrMapValue(isNumber, desc='Minimum amount to shift.'), leftAxisSkipLL0 = AttrMapValue(EitherOr((isBoolean,isListOfNumbers)), desc='Skip/Keep lowest tick label when true/false.\nOr skiplist'), labelVOffset = AttrMapValue(isNumber, desc='add this to the labels'), ) def __init__(self,**kw): YValueAxis.__init__(self,**kw) self.requiredRange = 30 self.leftAxisPercent = 1 self.leftAxisOrigShiftIPC = 0.15 self.leftAxisOrigShiftMin = 12 self.leftAxisSkipLL0 = self.labelVOffset = 0 self.valueSteps = None def _rangeAdjust(self): "Adjusts the value range of the axis." from reportlab.graphics.charts.utils import find_good_grid, ticks y_min, y_max = self._valueMin, self._valueMax m = self.maximumTicks n = list(filter(lambda x,m=m: x<=m,[4,5,6,7,8,9])) if not n: n = [m] valueStep, requiredRange = self.valueStep, self.requiredRange if requiredRange and y_max - y_min < requiredRange: y1, y2 = find_good_grid(y_min, y_max,n=n,grid=valueStep)[:2] if y2 - y1 < requiredRange: ym = (y1+y2)*0.5 y1 = min(ym-requiredRange*0.5,y_min) y2 = max(ym+requiredRange*0.5,y_max) if y_min>=100 and y1<100: y2 = y2 + 100 - y1 y1 = 100 elif y_min>=0 and y1<0: y2 = y2 - y1 y1 = 0 self._valueMin, self._valueMax = y1, y2 T, L = ticks(self._valueMin, self._valueMax, split=1, n=n, percent=self.leftAxisPercent,grid=valueStep, labelVOffset=self.labelVOffset) abf = self.avoidBoundFrac if abf: i1 = (T[1]-T[0]) if not isSeq(abf): i0 = i1 = i1*abf else: i0 = i1*abf[0] i1 = i1*abf[1] _n = getattr(self,'_cValueMin',T[0]) _x = getattr(self,'_cValueMax',T[-1]) if _n - T[0] < i0: self._valueMin = self._valueMin - i0 if T[-1]-_x < i1: self._valueMax = self._valueMax + i1 T, L = ticks(self._valueMin, self._valueMax, split=1, n=n, percent=self.leftAxisPercent,grid=valueStep, labelVOffset=self.labelVOffset) self._valueMin = T[0] self._valueMax = T[-1] self._tickValues = T if self.labelTextFormat is None: self._labelTextFormat = L else: self._labelTextFormat = self.labelTextFormat if abs(self._valueMin-100)<1e-6: self._calcValueStep() vMax, vMin = self._valueMax, self._valueMin m = max(self.leftAxisOrigShiftIPC*self._valueStep, (vMax-vMin)*self.leftAxisOrigShiftMin/self._length) self._valueMin = self._valueMin - m if self.leftAxisSkipLL0: if isSeq(self.leftAxisSkipLL0): for x in self.leftAxisSkipLL0: try: L[x] = '' except IndexError: pass L[0] = '' class LogValueAxis(ValueAxis): def _calcScaleFactor(self): """Calculate the axis' scale factor. This should be called only *after* the axis' range is set. Returns a number. """ self._scaleFactor = self._length / float( math_log10(self._valueMax) - math_log10(self._valueMin)) return self._scaleFactor def _setRange(self,dataSeries): valueMin = self.valueMin valueMax = self.valueMax aMin = _findMin(dataSeries,self._dataIndex,0) aMax = _findMax(dataSeries,self._dataIndex,0) if valueMin is None: valueMin = aMin if valueMax is None: valueMax = aMax if valueMin>valueMax: raise ValueError('%s: valueMin=%r should not be greater than valueMax=%r!' % (self.__class__.__name__valueMin, valueMax)) if valueMin<=0: raise ValueError('%s: valueMin=%r negative values are not allowed!' % valueMin) abS = self.avoidBoundSpace if abS: lMin = math_log10(aMin) lMax = math_log10(aMax) if not isSeq(abS): abS = abS, abS a0 = abS[0] or 0 a1 = abS[1] or 0 L = self._length - (a0 + a1) sf = (lMax-lMin)/float(L) lMin -= a0*sf lMax += a1*sf valueMin = min(valueMin,10**lMin) valueMax = max(valueMax,10**lMax) self._valueMin = valueMin self._valueMax = valueMax def _calcTickPositions(self): #self._calcValueStep() valueMin = cMin = math_log10(self._valueMin) valueMax = cMax = math_log10(self._valueMax) rr = self.rangeRound if rr: if rr in ('both','ceiling'): i = int(valueMax) valueMax = i + 1 if i<valueMax else i if rr in ('both','floor'): i = int(valueMin) valueMin = i - 1 if i>valueMin else i T = [].append tv = int(valueMin) if tv<valueMin: tv += 1 n = int(valueMax) - tv + 1 i = max(int(n/self.maximumTicks),1) if i*n>self.maximumTicks: i += 1 self._powerInc = i while True: if tv>valueMax: break if tv>=valueMin: T(10**tv) tv += i if valueMin!=cMin: self._valueMin = 10**valueMin if valueMax!=cMax: self._valueMax = 10**valueMax return T.__self__ def _calcSubTicks(self): if not hasattr(self,'_tickValues'): self._pseudo_configure() otv = self._tickValues if not hasattr(self,'_subTickValues'): T = [].append valueMin = math_log10(self._valueMin) valueMax = math_log10(self._valueMax)+1 tv = round(valueMin) i = self._powerInc if i==1: fac = 10 / float(self.subTickNum) start = 1 if self.subTickNum == 10: start = 2 while tv < valueMax: for j in xrange(start,self.subTickNum): v = fac*j*(10**tv) if v > self._valueMin and v < self._valueMax: T(v) tv += i else: ng = min(self.subTickNum+1,i-1) while ng: if (i % ng)==0: i /= ng break ng -= 1 else: i = 1 tv = round(valueMin) while True: v = 10**tv if v >= self._valueMax: break if v not in otv: T(v) tv += i self._subTickValues = T.__self__ self._tickValues = self._subTickValues return otv class LogAxisTickLabeller(TickLabeller): def __call__(self,axis,value): e = math_log10(value) e = int(e-0.001 if e<0 else e+0.001) if e==0: return '1' if e==1: return '10' return '10<sup>%s</sup>' % e class LogAxisLabellingSetup: def __init__(self): if DirectDrawFlowable is not None: self.labels = TypedPropertyCollection(XLabel) if self._dataIndex==1: self.labels.boxAnchor = 'e' self.labels.dx = -5 self.labels.dy = 0 else: self.labels.boxAnchor = 'n' self.labels.dx = 0 self.labels.dy = -5 self.labelTextFormat = LogAxisTickLabeller() else: self.labelTextFormat = "%.0e" class LogXValueAxis(LogValueAxis,LogAxisLabellingSetup,XValueAxis): _attrMap = AttrMap(BASE=XValueAxis) def __init__(self): XValueAxis.__init__(self) LogAxisLabellingSetup.__init__(self) def scale(self, value): """Converts a numeric value to a Y position. The chart first configures the axis, then asks it to work out the x value for each point when plotting lines or bars. You could override this to do logarithmic axes. """ msg = "Axis cannot scale numbers before it is configured" assert self._configured, msg if value is None: value = 0 if value == 0.: return self._x - self._scaleFactor * math_log10(self._valueMin) return self._x + self._scaleFactor * (math_log10(value) - math_log10(self._valueMin)) class LogYValueAxis(LogValueAxis,LogAxisLabellingSetup,YValueAxis): _attrMap = AttrMap(BASE=YValueAxis) def __init__(self): YValueAxis.__init__(self) LogAxisLabellingSetup.__init__(self) def scale(self, value): """Converts a numeric value to a Y position. The chart first configures the axis, then asks it to work out the x value for each point when plotting lines or bars. You could override this to do logarithmic axes. """ msg = "Axis cannot scale numbers before it is configured" assert self._configured, msg if value is None: value = 0 if value == 0.: return self._y - self._scaleFactor * math_log10(self._valueMin) return self._y + self._scaleFactor * (math_log10(value) - math_log10(self._valueMin))