Dynamic resizing

wxPython Users
1

Dynamic resizing
I am trying to make a wxChoice show/hide/resize a wxTextCtrl and wxButton depending on the item selected in the wxChoice. The 3 widgets are in a horizontal BoxSizer. When the wxTextCtrl resizes, the wxButton should move so that it is just to the right of the wxTextCtrl.

Here is my EVT_CHOICE handler:

def OnChoice(self, event):

   

    sel = event.GetSelection()

   

    if sel == 0:

        show = False

        t_len = 40

     

    elif sel == 1:

        show = True

        t_len = 40

   

    else: # sel == 2

        show = True

        t_len = 120

self.d_sizer.Show(self.text_ctrl_1, show)

    self.d_sizer.Show(self.button_3, show)

    self.text_ctrl_1.SetSize(wx.Size(t_len, -1))

    self.d_sizer.Layout()

The show/hide functionality works OK. However the resizing doesn’t.

If I include the Layout() call, the wx.TextCtrl widget momentarily expands but then immediately shrinks again. If I leave out the Layout() call, the wxTextCtrl widget expands and contracts OK, but the button doesn’t move in and out with it.

Is it possible to achieve the required behaviour?

I did wonder if I could use the wxSizer.Detach() method to detach the button and then add it again, but the Detach method does not appear to be supported in wxPython 2.5.1.5, even though it appears in the wxWidgets documentation.

Using wxPython-2.5.1.5, Python-2.3.3, Win98.

regards

Richard Townsend

2

I am trying to make a wxChoice show/hide/resize a wxTextCtrl and wxButton
depending on the item selected in the wxChoice. The 3 widgets are in a
horizontal BoxSizer. When the wxTextCtrl resizes, the wxButton should move
so that it is just to the right of the wxTextCtrl.

Here is my EVT_CHOICE handler:

    def OnChoice(self, event):

        sel = event.GetSelection()

        if sel == 0:
            show = False
            t_len = 40

        elif sel == 1:
            show = True
            t_len = 40

        else: # sel == 2
            show = True
            t_len = 120

  self.d_sizer.Show(self.text_ctrl_1, show)
  self.d_sizer.Show(self.button_3, show)
  self.text_ctrl_1.SetSize(wx.Size(t_len, -1))

I think you need to add this (or something similar) here:

        w,h = text_ctrl_1.GetSizeTuple()
        d_sizer.SetItemMinSize(text_ctrl_1,w,h)

It reports the new size to the sizer

  self.d_sizer.Layout()

The show/hide functionality works OK. However the resizing doesn't.

If I include the Layout() call, the wx.TextCtrl widget momentarily expands
but then immediately shrinks again. If I leave out the Layout() call, the
wxTextCtrl widget expands and contracts OK, but the button doesn't move in
and out with it.

Is it possible to achieve the required behaviour?

I did wonder if I could use the wxSizer.Detach() method to detach the
button and then add it again, but the Detach method does not appear to be
supported in wxPython 2.5.1.5, even though it appears in the wxWidgets
documentation.

Using wxPython-2.5.1.5, Python-2.3.3, Win98.

regards
Richard Townsend

Remco

···

On Friday 07 May 2004 14:59, Richard.Townsend@edl.uk.eds.com wrote: