ScrolledThumbnail Error

wxPython Users
#1

Hi,

Using the ScrolledThumbnail widget, I am getting the following error when clicking on a thumbnail which is only partially shown (i.e., which we would need to scroll down or up to show completely).

Traceback (most recent call last):
  File "myproject\.venv\Lib\site-packages\wx\lib\agw\scrolledthumbnail.py", line 1817, in OnMouseDown
    self.ScrollToSelected()
  File "myproject\.venv\Lib\site-packages\wx\lib\agw\scrolledthumbnail.py", line 1540, in ScrollToSelected
    self.Scroll(x,sy)
TypeError: _ScrolledWindowBase.Scroll(): arguments did not match any overloaded call:
  overload 1: argument 2 has unexpected type 'float'
  overload 2: argument 1 has unexpected type 'int'

Here is the relevant code causing the error:

self.scrolledthumbnail.Bind(EVT_THUMBNAILS_SEL_CHANGED, self.OnSelectThumb)

    def OnSelectThumb(self, event):
        sel = self.thumbnail_scroller.GetSelection()
        wx.MessageBox(self.thumbnail_scroller.GetThumbInfo(sel))

Is this a bug? Is there any workaround?

Thanks

#2

It’s likely that Scroll() is not expecting a floating point value. Easy to fix in the ScrolledThumbnail code, just round it to an integer and see if the error is gone - and if the behaviour is what you expect it to be.

#3

Thank you for your input!

Currently I install wxpython using pip, is it possible and if yes what is the easiest way to switch to a local file that I can edit for ScrolledThumbnail only?

#4
  1. Copy ScrolledThumbnail from wx.lib into your local folder
  2. Apply your edits
  3. Import ScrolledThumbnail from your local folder rather than wx.lib
  4. Once your edits are ok, consider providing a PR
#5

Thank you for your kind explanation! Was able to fix following your steps. Rounding to an integer indeed fixed the issue.

Will look into how to do a PR.

Best,