Added wxListCtrlAutoWidthMixin from Erik Westra.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14888 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/wxPython/lib/mixins/listctrl.py

@@ -128,9 +128,110 @@ class wxColumnSorterMixin:
 
 
 #----------------------------------------------------------------------------
+#----------------------------------------------------------------------------
+
+class wxListCtrlAutoWidthMixin:
+    """ A mix-in class that automatically resizes the last column to take up
+	the remaining width of the wxListCtrl.
+
+	This causes the wxListCtrl to automatically take up the full width of
+	the list, without either a horizontal scroll bar (unless absolutely
+	necessary) or empty space to the right of the last column.
+
+	NOTE:    This only works for report-style lists.
+
+	WARNING: If you override the EVT_SIZE event in your wxListCtrl, make
+		 sure you call event.Skip() to ensure that the mixin's
+		 _OnResize method is called.
+
+	This mix-in class was written by Erik Westra <ewestra@wave.co.nz>
+"""
+    def __init__(self):
+	""" Standard initialiser.
+	"""
+	EVT_SIZE(self, self._onResize)
+	self._lastColMinWidth = None
+
+
+    def resizeLastColumn(self, minWidth):
+	""" Resize the last column appropriately.
+
+	    If the list's columns are too wide to fit within the window, we use
+	    a horizontal scrollbar.  Otherwise, we expand the right-most column
+	    to take up the remaining free space in the list.
+
+	    This method is called automatically when the wxListCtrl is resized;
+	    you can also call it yourself whenever you want the last column to
+	    be resized appropriately (eg, when adding, removing or resizing
+	    columns).
+
+	    'minWidth' is the preferred minimum width for the last column.
+	"""
+	self.lastColMinWidth = minWidth
+	self._doResize()
+
+    # =====================
+    # == Private Methods ==
+    # =====================
+
+    def _onResize(self, event):
+	""" Respond to the wxListCtrl being resized.
+
+	    We automatically resize the last column in the list.
+	"""
+	self._doResize()
+
+
+    def _doResize(self):
+	""" Resize the last column as appropriate.
+
+	    If the list's columns are too wide to fit within the window, we use
+	    a horizontal scrollbar.  Otherwise, we expand the right-most column
+	    to take up the remaining free space in the list.
+
+	    We remember the current size of the last column, before resizing,
+	    as the preferred minimum width if we haven't previously been given
+	    or calculated a minimum width.  This ensure that repeated calls to
+	    _doResize() don't cause the last column to size itself too large.
+	"""
+	numCols = self.GetColumnCount()
+	if numCols == 0: return # Nothing to resize.
+
+	if self._lastColMinWidth == None:
+	    self._lastColMinWidth = self.GetColumnWidth(numCols - 1)
+
+	listWidth = self.GetSize().width
+	if self.GetItemCount() > self.GetCountPerPage():
+	    # We're showing the vertical scrollbar -> allow for scrollbar width
+	    scrollWidth = wxSystemSettings_GetSystemMetric(wxSYS_VSCROLL_X)
+	    listWidth = listWidth - scrollWidth
+
+	totColWidth = 0 # Width of all columns except last one.
+	for col in range(numCols-1):
+	    totColWidth = totColWidth + self.GetColumnWidth(col)
+
+	lastColWidth = self.GetColumnWidth(numCols - 1)
+
+	margin = 6 # NOTE: This is the extra number of pixels required to make
+		   #       the wxListCtrl size correctly, at least under
+		   #       Windows 2000.  Unfortunately, different OSs and
+		   #       even different versions of the same OS may implement
+		   #       the wxListCtrl differently, so different margins may
+		   #       be needed to get the columns resized correctly.  No
+		   #       doubt the margin could be calculated in a more
+		   #       intelligent manner...
+
+	if totColWidth + self._lastColMinWidth > listWidth - margin:
+	    # We haven't got the width to show the last column at its minimum
+	    # width -> set it to its minimum width and allow the horizontal
+	    # scrollbar to show.
+	    self.SetColumnWidth(numCols-1, self._lastColMinWidth)
+	    return
+
+	# Resize the last column to take up the remaining available space.
+
+	self.SetColumnWidth(numCols-1, listWidth - totColWidth - margin)
 
 
 
-
-
-
+#----------------------------------------------------------------------------