projects / wxWidgets.git / blame
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|---|---|---|
| f9c1b462 RD |
1 | #---------------------------------------------------------------------- |
| 2 | # Name: wx.lib.wrap | |
| 3 | # Purpose: Contains a function to aid in word-wrapping some text | |
| 4 | # | |
| 5 | # Author: Robin Dunn | |
| 6 | # | |
| 7 | # Created: 15-Oct-2006 | |
| 8 | # RCS-ID: $Id$ | |
| 9 | # Copyright: (c) 2006 by Total Control Software | |
| 10 | # Licence: wxWindows license | |
| 11 | #---------------------------------------------------------------------- | |
| 12 | ||
| 13 | ||
| 14 | ||
| 15 | def wordwrap(text, width, dc, breakLongWords=True): | |
| 16 | """ | |
| 17 | Returns a copy of text with newline characters inserted where long | |
| 18 | lines should be broken such that they will fit within the given | |
| 19 | width, on the given `wx.DC` using its current font settings. By | |
| 20 | default words that are wider than width will be broken at the | |
| 21 | nearest character boundary, but this can be disabled by passing | |
| 22 | ``False`` for the ``breakLongWords`` parameter. | |
| 23 | """ | |
| 24 | ||
| 25 | wrapped_lines = [] | |
| 26 | text = text.split('\n') | |
| 27 | for line in text: | |
| 28 | pte = dc.GetPartialTextExtents(line) | |
| 29 | idx = 0 | |
| 30 | start = 0 | |
| 31 | startIdx = 0 | |
| 32 | spcIdx = -1 | |
| 33 | while idx < len(pte): | |
| 34 | # remember the last seen space | |
| 35 | if line[idx] == ' ': | |
| 36 | spcIdx = idx | |
| 37 | ||
| 38 | # have we reached the max width? | |
| 39 | if pte[idx] - start > width and (spcIdx != -1 or breakLongWords): | |
| 40 | if spcIdx != -1: | |
| 41 | idx = spcIdx + 1 | |
| 42 | wrapped_lines.append( line[startIdx : idx] ) | |
| 43 | start = pte[idx] | |
| 44 | startIdx = idx | |
| 45 | spcIdx = -1 | |
| 46 | ||
| 47 | idx += 1 | |
| 48 | ||
| 49 | wrapped_lines.append( line[startIdx : idx] ) | |
| 50 | ||
| 51 | return '\n'.join(wrapped_lines) | |
| 52 | ||
| 53 | ||
| 54 | ||
| 55 | ||
| 56 | ||
| 57 | if __name__ == '__main__': | |
| 58 | import wx | |
| 59 | class TestPanel(wx.Panel): | |
| 60 | def __init__(self, parent): | |
| 61 | wx.Panel.__init__(self, parent) | |
| 62 | ||
| 63 | self.tc = wx.TextCtrl(self, -1, "", (20,20), (150,150), wx.TE_MULTILINE) | |
| 64 | self.Bind(wx.EVT_TEXT, self.OnDoUpdate, self.tc) | |
| 65 | ||
| 66 | def OnDoUpdate(self, evt): | |
| 67 | WIDTH = 200 | |
| 68 | bmp = wx.EmptyBitmap(WIDTH, WIDTH) | |
| 69 | mdc = wx.MemoryDC(bmp) | |
| 70 | mdc.SetBackground(wx.Brush("white")) | |
| 71 | mdc.Clear() | |
| 72 | mdc.SetPen(wx.Pen("black")) | |
| 73 | mdc.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.NORMAL)) | |
| 74 | mdc.DrawRectangle(0,0, WIDTH, WIDTH) | |
| 75 | ||
| 76 | text = wordwrap(self.tc.GetValue(), WIDTH-2, mdc, False) | |
| 77 | #print repr(text) | |
| 78 | mdc.DrawLabel(text, (1,1, WIDTH-2, WIDTH-2)) | |
| 79 | ||
| 80 | del mdc | |
| 81 | dc = wx.ClientDC(self) | |
| 82 | dc.DrawBitmap(bmp, 200, 20) | |
| 83 | ||
| 84 | ||
| 85 | app = wx.App(False) | |
| 86 | frm = wx.Frame(None, title="Test wordWrap") | |
| 87 | pnl = TestPanel(frm) | |
| 88 | frm.Show() | |
| 89 | app.MainLoop() | |
| 90 | ||
| 91 |