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#----------------------------------------------------------------------
# Name: wx.lib.wrap
# Purpose: Contains a function to aid in word-wrapping some text
#
# Author: Robin Dunn
#
# Created: 15-Oct-2006
# RCS-ID: $Id: wordwrap.py 42055 2006-10-16 19:49:43Z RD $
# Copyright: (c) 2006 by Total Control Software
# Licence: wxWindows license
#----------------------------------------------------------------------
def wordwrap(text, width, dc, breakLongWords=True):
"""
Returns a copy of text with newline characters inserted where long
lines should be broken such that they will fit within the given
width, on the given `wx.DC` using its current font settings. By
default words that are wider than width will be broken at the
nearest character boundary, but this can be disabled by passing
``False`` for the ``breakLongWords`` parameter.
"""
wrapped_lines = []
text = text.split('\n')
for line in text:
pte = dc.GetPartialTextExtents(line)
idx = 0
start = 0
startIdx = 0
spcIdx = -1
while idx < len(pte):
# remember the last seen space
if line[idx] == ' ':
spcIdx = idx
# have we reached the max width?
if pte[idx] - start > width and (spcIdx != -1 or breakLongWords):
if spcIdx != -1:
idx = spcIdx + 1
wrapped_lines.append( line[startIdx : idx] )
start = pte[idx]
startIdx = idx
spcIdx = -1
idx += 1
wrapped_lines.append( line[startIdx : idx] )
return '\n'.join(wrapped_lines)
if __name__ == '__main__':
import wx
class TestPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
self.tc = wx.TextCtrl(self, -1, "", (20,20), (150,150), wx.TE_MULTILINE)
self.Bind(wx.EVT_TEXT, self.OnDoUpdate, self.tc)
def OnDoUpdate(self, evt):
WIDTH = 200
bmp = wx.EmptyBitmap(WIDTH, WIDTH)
mdc = wx.MemoryDC(bmp)
mdc.SetBackground(wx.Brush("white"))
mdc.Clear()
mdc.SetPen(wx.Pen("black"))
mdc.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL))
mdc.DrawRectangle(0,0, WIDTH, WIDTH)
text = wordwrap(self.tc.GetValue(), WIDTH-2, mdc, False)
#print repr(text)
mdc.DrawLabel(text, (1,1, WIDTH-2, WIDTH-2))
del mdc
dc = wx.ClientDC(self)
dc.DrawBitmap(bmp, 200, 20)
app = wx.App(False)
frm = wx.Frame(None, title="Test wordWrap")
pnl = TestPanel(frm)
frm.Show()
app.MainLoop()
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