wxPython/demo/ScrolledPanel.py

   1
   2 from wxPython.wx import *
   3
   4 #----------------------------------------------------------------------
   5
   6 text = "one two buckle my shoe three four shut the door five six pick up sticks seven eight lay them straight nine ten big fat hen"
   7
   8
   9 class ScrolledPanel(wxScrolledWindow):
  10     def __init__(self, parent, log):
  11         self.log = log
  12         wxScrolledWindow.__init__(self, parent, -1,
  13                                   style = wxTAB_TRAVERSAL)
  14
  15         box = wxBoxSizer(wxVERTICAL)
  16         box.Add(wxStaticText(self, -1,
  17                              "This sample shows how to make a scrollable data entry \n"
  18                              "form by using a wxSizer in a wxScrolledWindow."),
  19                 0, wxCENTER|wxALL, 5)
  20         box.Add(wxStaticLine(self, -1), 0, wxEXPAND|wxALL, 5)
  21
  22         fgs = wxFlexGridSizer(cols=2, vgap=4, hgap=4)
  23         fgs.AddGrowableCol(1)
  24
  25         # Add some spacers
  26         fgs.Add(75, 10)
  27         fgs.Add(150, 10)
  28
  29         for word in text.split():
  30             label = wxStaticText(self, -1, word+":")
  31             tc = wxTextCtrl(self, -1, word)
  32             fgs.Add(label, flag=wxALIGN_RIGHT | wxALIGN_CENTER_VERTICAL)
  33             fgs.Add(tc, flag=wxEXPAND)
  34
  35         box.Add(fgs, 1)
  36         box.Add(10, 40)  # some more empty space at the bottom
  37         self.SetSizer(box)
  38
  39
  40         # The following is all that is needed to integrate the sizer and the
  41         # scrolled window.  In this case we will only support vertical scrolling.
  42         self.EnableScrolling(false, true)
  43         self.SetScrollRate(0, 20)
  44         box.SetVirtualSizeHints(self)
  45         EVT_CHILD_FOCUS(self, self.OnChildFocus)
  46
  47         wxCallAfter(self.Scroll, 0, 0) # scroll back to top after initial events
  48
  49
  50     def OnChildFocus(self, evt):
  51         # If the child window that gets the focus is not visible,
  52         # this handler will try to scroll enough to see it.  If you
  53         # need to handle horizontal auto-scrolling too then this will
  54         # need adapted.
  55         evt.Skip()
  56         child = evt.GetWindow()
  57
  58         sppu_y = self.GetScrollPixelsPerUnit()[1]
  59         vs_y   = self.GetViewStart()[1]
  60         cpos = child.GetPosition()
  61         csz  = child.GetSize()
  62
  63         # is it above the top?
  64         if cpos.y < 0:
  65             new_vs = cpos.y / sppu_y
  66             self.Scroll(-1, new_vs)
  67
  68         # is it below the bottom ?
  69         if cpos.y + csz.height > self.GetClientSize().height:
  70             diff = (cpos.y + csz.height - self.GetClientSize().height) / sppu_y
  71             self.Scroll(-1, vs_y + diff + 1)
  72
  73
  74 #----------------------------------------------------------------------
  75
  76
  77 def runTest(frame, nb, log):
  78     win = ScrolledPanel(nb, log)
  79     return win
  80
  81 #----------------------------------------------------------------------
  82
  83
  84
  85 overview = """<html><body>
  86 This sample shows how to make a scrollable data entry form by
  87 using a wxSizer in a wxScrolledWindow.
  88 </body></html>
  89 """
  90
  91
  92
  93 if __name__ == '__main__':
  94     import sys,os
  95     import run
  96     run.main(['', os.path.basename(sys.argv[0])])
  97