Fix or add some DoGetBestSize's

[wxWidgets.git] / wxPython / wx / lib / scrolledpanel.py

diff --git a/wxPython/wx/lib/scrolledpanel.py b/wxPython/wx/lib/scrolledpanel.py
index 3a809ae20da73dcc64149a0e1f269b5a1a3f3e78..f9640c03b2c9963273385402f249b8444bb4671f 100644 (file)
--- a/wxPython/wx/lib/scrolledpanel.py
+++ b/wxPython/wx/lib/scrolledpanel.py
@@ -1,8 +1,103 @@
+#----------------------------------------------------------------------------
+# Name:         scrolledpanel.py
+# Author:       Will Sadkin
+# Created:      03/21/2003
+# Copyright:    (c) 2003 by Will Sadkin
+# RCS-ID:       $Id$
+# License:      wxWindows license
+#----------------------------------------------------------------------------
+# 12/11/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o 2.5 compatability update.
+#
+# 12/21/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o wxScrolledPanel -> ScrolledPanel
+#
 
-"""Renamer stub: provides a way to drop the wx prefix from wxPython objects."""
+import  wx
 
-from wx import _rename
-from wxPython.lib import scrolledpanel
-_rename(globals(), scrolledpanel.__dict__, modulename='lib.scrolledpanel')
-del scrolledpanel
-del _rename
+
+class ScrolledPanel( wx.ScrolledWindow ):
+    """\
+ScrolledPanel fills a "hole" in the implementation of wx.ScrolledWindow,
+providing automatic scrollbar and scrolling behavior and the tab traversal
+management that wxScrolledWindow lacks.  This code was based on the original
+demo code showing how to do this, but is now available for general use
+as a proper class (and the demo is now converted to just use it.)
+"""
+    def __init__(self, parent, id=-1,
+                 pos = wx.DefaultPosition, size = wx.DefaultSize,
+                 style = wx.TAB_TRAVERSAL, name = "scrolledpanel"):
+
+        wx.ScrolledWindow.__init__(self, parent, -1,
+                                  pos=pos, size=size,
+                                  style=style, name=name)
+
+        self.Bind(wx.EVT_CHILD_FOCUS, self.OnChildFocus)
+
+
+    def SetupScrolling(self, scroll_x=True, scroll_y=True, rate_x=20, rate_y=20):
+        """
+        This function sets up the event handling necessary to handle
+        scrolling properly. It should be called within the __init__
+        function of any class that is derived from ScrolledPanel,
+        once the controls on the panel have been constructed and
+        thus the size of the scrolling area can be determined.
+
+        """
+        # The following is all that is needed to integrate the sizer and the
+        # scrolled window.
+        if not scroll_x: rate_x = 0
+        if not scroll_y: rate_y = 0
+
+        # Round up the virtual size to be a multiple of the scroll rate
+        sizer = self.GetSizer()
+        if sizer:
+            w, h = sizer.GetMinSize()
+            if rate_x:
+                w += rate_x - (w % rate_x)
+            if rate_y:
+                h += rate_y - (h % rate_y)
+            self.SetVirtualSize( (w, h) )
+            self.SetVirtualSizeHints( w, h )
+
+        self.SetScrollRate(rate_x, rate_y)
+        wx.CallAfter(self.Scroll, 0, 0) # scroll back to top after initial events
+
+
+    def OnChildFocus(self, evt):
+        # If the child window that gets the focus is not visible,
+        # this handler will try to scroll enough to see it.
+        evt.Skip()
+        child = evt.GetWindow()
+
+        sppu_x, sppu_y = self.GetScrollPixelsPerUnit()
+        vs_x, vs_y   = self.GetViewStart()
+        cpos = child.GetPosition()
+        csz  = child.GetSize()
+        new_vs_x, new_vs_y = -1, -1
+
+        # is it before the left edge?
+        if cpos.x < 0 and sppu_x > 0:
+            new_vs_x = vs_x + (cpos.x / sppu_x)
+
+        # is it above the top?
+        if cpos.y < 0 and sppu_y > 0:
+            new_vs_y = vs_y + (cpos.y / sppu_y)
+
+        clntsz = self.GetClientSize()
+
+        # is it past the right edge ?
+        if cpos.x + csz.width > clntsz.width and sppu_x > 0:
+            diff = (cpos.x + csz.width - clntsz.width) / sppu_x
+            new_vs_x = vs_x + diff + 1
+
+        # is it below the bottom ?
+        if cpos.y + csz.height > clntsz.height and sppu_y > 0:
+            diff = (cpos.y + csz.height - clntsz.height) / sppu_y
+            new_vs_y = vs_y + diff + 1
+
+        # if we need to adjust
+        if new_vs_x != -1 or new_vs_y != -1:
+            self.Scroll(new_vs_x, new_vs_y)