added missing files

[swftools.git] / wx / lib / wordwrap.py

diff --git a/wx/lib/wordwrap.py b/wx/lib/wordwrap.py
new file mode 100644 (file)
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--- /dev/null
+++ b/wx/lib/wordwrap.py
@@ -0,0 +1,97 @@
+#----------------------------------------------------------------------
+# Name:        wx.lib.wordwrap
+# Purpose:     Contains a function to aid in word-wrapping some text
+#
+# Author:      Robin Dunn
+#
+# Created:     15-Oct-2006
+# RCS-ID:      $Id: wordwrap.py 54718 2008-07-19 18:57:26Z RD $
+# Copyright:   (c) 2006 by Total Control Software
+# Licence:     wxWindows license
+#----------------------------------------------------------------------
+
+def wordwrap(text, width, dc, breakLongWords=True, margin=0):
+    """
+    Returns a copy of text with newline characters inserted where long
+    lines should be broken such that they will fit within the given
+    width, with the given margin left and right, on the given `wx.DC`
+    using its current font settings.  By default words that are wider
+    than the margin-adjusted 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)        
+        wid = ( width - (2*margin+1)*dc.GetTextExtent(' ')[0] 
+              - max([0] + [pte[i]-pte[i-1] for i in range(1,len(pte))]) )
+        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 > wid and (spcIdx != -1 or breakLongWords):
+                if spcIdx != -1:
+                    idx = spcIdx + 1
+                wrapped_lines.append(' '*margin + line[startIdx : idx] + ' '*margin)
+                start = pte[idx]
+                startIdx = idx
+                spcIdx = -1
+
+            idx += 1
+
+        wrapped_lines.append(' '*margin + line[startIdx : idx] + ' '*margin)
+
+    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)
+            self.Bind(wx.EVT_SIZE, self.OnSize)
+            
+
+        def OnSize(self, evt):
+            wx.CallAfter(self.OnDoUpdate, None)
+            
+            
+        def OnDoUpdate(self, evt):
+            WIDTH = self.GetSize().width - 220
+            HEIGHT = 200
+            bmp = wx.EmptyBitmap(WIDTH, HEIGHT)
+            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, HEIGHT)
+
+            text = wordwrap(self.tc.GetValue(), WIDTH-2, mdc, False)
+            #print repr(text)
+            mdc.DrawLabel(text, (1,1, WIDTH-2, HEIGHT-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()
+
+