+"""<font weight="bold" size="16">FancyText</font> -- <font style="italic" size="16">methods for rendering XML specified text</font>
+<font family="swiss" size="12">
+This module exports four main methods::
+<font family="fixed" style="slant">
+ def GetExtent(str, dc=None, enclose=True)
+ def GetFullExtent(str, dc=None, enclose=True)
+ def RenderToBitmap(str, background=None, enclose=True)
+ def RenderToDC(str, dc, x, y, enclose=True)
+</font>
+In all cases, 'str' is an XML string. Note that start and end tags
+are only required if *enclose* is set to False. In this case the
+text should be wrapped in FancyText tags.
+
+In addition, the module exports one class::
+<font family="fixed" style="slant">
+ class StaticFancyText(self, window, id, text, background, ...)
+</font>
+This class works similar to StaticText except it interprets its text
+as FancyText.
+
+The text can support<sup>superscripts</sup> and <sub>subscripts</sub>, text
+in different <font size="20">sizes</font>, <font color="blue">colors</font>, <font style="italic">styles</font>, <font weight="bold">weights</font> and
+<font family="script">families</font>. It also supports a limited set of symbols,
+currently <times/>, <infinity/>, <angle/> as well as greek letters in both
+upper case (<Alpha/><Beta/>...<Omega/>) and lower case (<alpha/><beta/>...<omega/>).
+
+We can use doctest/guitest to display this string in all its marked up glory.
+<font family="fixed">
+>>> frame = wx.Frame(wx.NULL, -1, "FancyText demo", wx.DefaultPosition)
+>>> sft = StaticFancyText(frame, -1, __doc__, wx.Brush("light grey", wx.SOLID))
+>>> frame.SetClientSize(sft.GetSize())
+>>> didit = frame.Show()
+>>> from guitest import PauseTests; PauseTests()
+
+</font></font>
+The End"""
+# Copyright 2001-2003 Timothy Hochberg
+# Use as you see fit. No warantees, I cannot be help responsible, etc.
+import copy
+import math
+import sys
+import wx
+import xml.parsers.expat
+
+__all__ = "GetExtent", "GetFullExtent", "RenderToBitmap", "RenderToDC", "StaticFancyText"
+
+if sys.platform == "win32":
+ _greekEncoding = str(wx.FONTENCODING_CP1253)
+else:
+ _greekEncoding = str(wx.FONTENCODING_ISO8859_7)
+
+_families = {"fixed" : wx.FIXED, "default" : wx.DEFAULT, "decorative" : wx.DECORATIVE, "roman" : wx.ROMAN,
+ "script" : wx.SCRIPT, "swiss" : wx.SWISS, "modern" : wx.MODERN}
+_styles = {"normal" : wx.NORMAL, "slant" : wx.SLANT, "italic" : wx.ITALIC}
+_weights = {"normal" : wx.NORMAL, "light" : wx.LIGHT, "bold" : wx.BOLD}
+
+# The next three classes: Renderer, SizeRenderer and DCRenderer are
+# what you will need to override to extend the XML language. All of
+# the font stuff as well as the subscript and superscript stuff are in
+# Renderer.
+
+_greek_letters = ("alpha", "beta", "gamma", "delta", "epsilon", "zeta",
+ "eta", "theta", "iota", "kappa", "lambda", "mu", "nu",
+ "xi", "omnikron", "pi", "rho", "altsigma", "sigma", "tau", "upsilon",
+ "phi", "chi", "psi", "omega")
+
+def iround(number):
+ return int(round(number))
+
+def iceil(number):
+ return int(math.ceil(number))
+
+class Renderer:
+ """Class for rendering XML marked up text.
+
+ See the module docstring for a description of the markup.
+
+ This class must be subclassed and the methods the methods that do
+ the drawing overridden for a particular output device.
+
+ """
+ defaultSize = None
+ defaultFamily = wx.DEFAULT
+ defaultStyle = wx.NORMAL
+ defaultWeight = wx.NORMAL
+ defaultEncoding = None
+ defaultColor = "black"
+
+ def __init__(self, dc=None, x=0, y=None):
+ if dc == None:
+ dc = wx.MemoryDC()
+ self.dc = dc
+ self.offsets = [0]
+ self.fonts = [{}]
+ self.width = self.height = 0
+ self.x = x
+ self.minY = self.maxY = self._y = y
+ if Renderer.defaultSize is None:
+ Renderer.defaultSize = wx.NORMAL_FONT.GetPointSize()
+ if Renderer.defaultEncoding is None:
+ Renderer.defaultEncoding = wx.Font_GetDefaultEncoding()
+
+ def getY(self):
+ if self._y is None:
+ self.minY = self.maxY = self._y = self.dc.GetTextExtent("M")[1]
+ return self._y
+ def setY(self, value):
+ self._y = y
+ y = property(getY, setY)
+
+ def startElement(self, name, attrs):
+ method = "start_" + name
+ if not hasattr(self, method):
+ raise ValueError("XML tag '%s' not supported" % name)
+ getattr(self, method)(attrs)
+
+ def endElement(self, name):
+ methname = "end_" + name
+ if hasattr(self, methname):
+ getattr(self, methname)()
+ elif hasattr(self, "start_" + name):
+ pass
+ else:
+ raise ValueError("XML tag '%s' not supported" % methname)
+
+ def characterData(self, data):
+ self.dc.SetFont(self.getCurrentFont())
+ for i, chunk in enumerate(data.split('\n')):
+ if i:
+ self.x = 0
+ self.y = self.mayY = self.maxY + self.dc.GetTextExtent("M")[1]
+ if chunk:
+ width, height, descent, extl = self.dc.GetFullTextExtent(chunk)
+ self.renderCharacterData(data, iround(self.x), iround(self.y + self.offsets[-1] - height + descent))
+ else:
+ width = height = descent = extl = 0
+ self.updateDims(width, height, descent, extl)
+
+ def updateDims(self, width, height, descent, externalLeading):
+ self.x += width
+ self.width = max(self.x, self.width)
+ self.minY = min(self.minY, self.y+self.offsets[-1]-height+descent)
+ self.maxY = max(self.maxY, self.y+self.offsets[-1]+descent)
+ self.height = self.maxY - self.minY
+
+ def start_FancyText(self, attrs):
+ pass
+ start_wxFancyText = start_FancyText # For backward compatibility
+
+ def start_font(self, attrs):
+ for key, value in attrs.items():
+ if key == "size":
+ value = int(value)
+ elif key == "family":
+ value = _families[value]
+ elif key == "style":
+ value = _styles[value]
+ elif key == "weight":
+ value = _weights[value]
+ elif key == "encoding":
+ value = int(value)
+ elif key == "color":
+ pass
+ else:
+ raise ValueError("unknown font attribute '%s'" % key)
+ attrs[key] = value
+ font = copy.copy(self.fonts[-1])
+ font.update(attrs)
+ self.fonts.append(font)
+
+ def end_font(self):
+ self.fonts.pop()
+
+ def start_sub(self, attrs):
+ if attrs.keys():
+ raise ValueError("<sub> does not take attributes")
+ font = self.getCurrentFont()
+ self.offsets.append(self.offsets[-1] + self.dc.GetFullTextExtent("M", font)[1]*0.5)
+ self.start_font({"size" : font.GetPointSize() * 0.8})
+
+ def end_sub(self):
+ self.fonts.pop()
+ self.offsets.pop()
+
+ def start_sup(self, attrs):
+ if attrs.keys():
+ raise ValueError("<sup> does not take attributes")
+ font = self.getCurrentFont()
+ self.offsets.append(self.offsets[-1] - self.dc.GetFullTextExtent("M", font)[1]*0.3)
+ self.start_font({"size" : font.GetPointSize() * 0.8})
+
+ def end_sup(self):
+ self.fonts.pop()
+ self.offsets.pop()
+
+ def getCurrentFont(self):
+ font = self.fonts[-1]
+ return wx.TheFontList.FindOrCreateFont(font.get("size", self.defaultSize),
+ font.get("family", self.defaultFamily),
+ font.get("style", self.defaultStyle),
+ font.get("weight", self.defaultWeight),
+ encoding = font.get("encoding", self.defaultEncoding))
+
+ def getCurrentColor(self):
+ font = self.fonts[-1]
+ return wx.TheColourDatabase.FindColour(font.get("color", self.defaultColor))
+
+ def getCurrentPen(self):
+ return wx.ThePenList.FindOrCreatePen(self.getCurrentColor(), 1, wx.SOLID)
+
+ def renderCharacterData(self, data, x, y):
+ raise NotImplementedError()
+
+
+def _addGreek():
+ alpha = 0xE1
+ Alpha = 0xC1
+ def end(self):
+ pass
+ for i, name in enumerate(_greek_letters):
+ def start(self, attrs, code=chr(alpha+i)):
+ self.start_font({"encoding" : _greekEncoding})
+ self.characterData(code)
+ self.end_font()
+ setattr(Renderer, "start_%s" % name, start)
+ setattr(Renderer, "end_%s" % name, end)
+ if name == "altsigma":
+ continue # There is no capital for altsigma
+ def start(self, attrs, code=chr(Alpha+i)):
+ self.start_font({"encoding" : _greekEncoding})
+ self.characterData(code)
+ self.end_font()
+ setattr(Renderer, "start_%s" % name.capitalize(), start)
+ setattr(Renderer, "end_%s" % name.capitalize(), end)
+_addGreek()
+
+
+
+class SizeRenderer(Renderer):
+ """Processes text as if rendering it, but just computes the size."""
+
+ def __init__(self, dc=None):
+ Renderer.__init__(self, dc, 0, 0)
+
+ def renderCharacterData(self, data, x, y):
+ pass
+
+ def start_angle(self, attrs):
+ self.characterData("M")
+
+ def start_infinity(self, attrs):
+ width, height = self.dc.GetTextExtent("M")
+ width = max(width, 10)
+ height = max(height, width / 2)
+ self.updateDims(width, height, 0, 0)
+
+ def start_times(self, attrs):
+ self.characterData("M")
+
+ def start_in(self, attrs):
+ self.characterData("M")
+
+ def start_times(self, attrs):
+ self.characterData("M")
+
+
+class DCRenderer(Renderer):
+ """Renders text to a wxPython device context DC."""
+
+ def renderCharacterData(self, data, x, y):
+ self.dc.SetTextForeground(self.getCurrentColor())
+ self.dc.DrawText(data, (x, y))
+
+ def start_angle(self, attrs):
+ self.dc.SetFont(self.getCurrentFont())
+ self.dc.SetPen(self.getCurrentPen())
+ width, height, descent, leading = self.dc.GetFullTextExtent("M")
+ y = self.y + self.offsets[-1]
+ self.dc.DrawLine((iround(self.x), iround(y)), (iround( self.x+width), iround(y)))
+ self.dc.DrawLine((iround(self.x), iround(y)), (iround(self.x+width), iround(y-width)))
+ self.updateDims(width, height, descent, leading)
+
+
+ def start_infinity(self, attrs):
+ self.dc.SetFont(self.getCurrentFont())
+ self.dc.SetPen(self.getCurrentPen())
+ width, height, descent, leading = self.dc.GetFullTextExtent("M")
+ width = max(width, 10)
+ height = max(height, width / 2)
+ self.dc.SetPen(wx.Pen(self.getCurrentColor(), max(1, width/10)))
+ self.dc.SetBrush(wx.TRANSPARENT_BRUSH)
+ y = self.y + self.offsets[-1]
+ r = iround( 0.95 * width / 4)
+ xc = (2*self.x + width) / 2
+ yc = iround(y-1.5*r)
+ self.dc.DrawCircle((xc - r, yc), r)
+ self.dc.DrawCircle((xc + r, yc), r)
+ self.updateDims(width, height, 0, 0)
+
+ def start_times(self, attrs):
+ self.dc.SetFont(self.getCurrentFont())
+ self.dc.SetPen(self.getCurrentPen())
+ width, height, descent, leading = self.dc.GetFullTextExtent("M")
+ y = self.y + self.offsets[-1]
+ width *= 0.8
+ width = iround(width+.5)
+ self.dc.SetPen(wx.Pen(self.getCurrentColor(), 1))
+ self.dc.DrawLine((iround(self.x), iround(y-width)), (iround(self.x+width-1), iround(y-1)))
+ self.dc.DrawLine((iround(self.x), iround(y-2)), (iround(self.x+width-1), iround(y-width-1)))
+ self.updateDims(width, height, 0, 0)
+
+
+def RenderToRenderer(str, renderer, enclose=True):
+ try:
+ if enclose:
+ str = '<?xml version="1.0"?><FancyText>%s</FancyText>' % str
+ p = xml.parsers.expat.ParserCreate()
+ p.returns_unicode = 0
+ p.StartElementHandler = renderer.startElement
+ p.EndElementHandler = renderer.endElement
+ p.CharacterDataHandler = renderer.characterData
+ p.Parse(str, 1)
+ except xml.parsers.expat.error, err:
+ raise ValueError('error parsing text text "%s": %s' % (str, err))
+
+
+# Public interface
+
+
+def GetExtent(str, dc=None, enclose=True):
+ "Return the extent of str"
+ renderer = SizeRenderer(dc)
+ RenderToRenderer(str, renderer, enclose)
+ return iceil(renderer.width), iceil(renderer.height) # XXX round up
+
+
+def GetFullExtent(str, dc=None, enclose=True):
+ renderer = SizeRenderer(dc)
+ RenderToRenderer(str, renderer, enclose)
+ return iceil(renderer.width), iceil(renderer.height), -iceil(renderer.minY) # XXX round up
+
+
+def RenderToBitmap(str, background=None, enclose=1):
+ "Return str rendered on a minumum size bitmap"
+ dc = wx.MemoryDC()
+ width, height, dy = GetFullExtent(str, dc, enclose)
+ bmp = wx.EmptyBitmap(width, height)
+ dc.SelectObject(bmp)
+ if background is None:
+ dc.SetBackground(wx.WHITE_BRUSH)
+ else:
+ dc.SetBackground(background)
+ dc.Clear()
+ renderer = DCRenderer(dc, y=dy)
+ dc.BeginDrawing()
+ RenderToRenderer(str, renderer, enclose)
+ dc.EndDrawing()
+ dc.SelectObject(wx.NullBitmap)
+ if background is None:
+ img = wx.ImageFromBitmap(bmp)
+ bg = dc.GetBackground().GetColour()
+ img.SetMaskColour(bg.Red(), bg.Green(), bg.Blue())
+ bmp = img.ConvertToBitmap()
+ return bmp
+
+
+def RenderToDC(str, dc, x, y, enclose=1):
+ "Render str onto a wxDC at (x,y)"
+ width, height, dy = GetFullExtent(str, dc)
+ renderer = DCRenderer(dc, x, y+dy)
+ RenderToRenderer(str, renderer, enclose)
+
+
+class StaticFancyText(wx.StaticBitmap):
+ def __init__(self, window, id, text, *args, **kargs):
+ args = list(args)
+ kargs.setdefault('name', 'staticFancyText')
+ if 'background' in kargs:
+ background = kargs.pop('background')
+ elif args:
+ background = args.pop(0)
+ else:
+ background = wx.Brush(window.GetBackgroundColour(), wx.SOLID)
+
+ bmp = RenderToBitmap(text, background)
+ wx.StaticBitmap.__init__(self, window, id, bmp, *args, **kargs)
+
+
+# Old names for backward compatibiliry
+getExtent = GetExtent
+renderToBitmap = RenderToBitmap
+renderToDC = RenderToDC
+
+
+# Test Driver
+
+def test():
+ app = wx.PyApp()
+ box = wx.BoxSizer(wx.VERTICAL)
+ frame = wx.Frame(wx.NULL, -1, "FancyText demo", wx.DefaultPosition)
+ frame.SetBackgroundColour("light grey")
+ sft = StaticFancyText(frame, -1, __doc__)
+ box.Add(sft, 1, wx.EXPAND)
+ frame.SetSizer(box)
+ frame.SetAutoLayout(True)
+ box.Fit(frame)
+ box.SetSizeHints(frame)
+ frame.Show()
+ app.MainLoop()
+
+if __name__ == "__main__":
+ test()
projects / wxWidgets.git / blobdiff