Column width is reverting back to defaults randomly after updating the data in the datagrid about ipydatagrid

[jobinnthomas]

Hi @jobinnthomas, in your requirements.txt you are using ipydatagrid==1.1.15

Try updating to the latest release 1.2.1 where I resolved the issue of column widths resetting when setting new data if auto_fit_columns is set to True.

Here is the PR fixing that issue: #452

Thanks..Yes i can confirm the issue is fixed..I am using the following and it works. You can close the issue.
notebook==7.0.8
voila==0.5.5
ipywidgets==8.1.1
ipydatagrid==1.2.1
ipynb==0.5.1

reqAcq.txt

[jgunstone]

hi -
if you set data in the way that you have, i.e.:
mygrid.data = df_new
you are effectively reinitialising the grid - you could give it a whole new dataframe with different col names when doing this.
as such it doesn't resets behaviour you had previously applied.
you can either:

• record the col widths before you set the grid and then reset them after (probs easiest)
• use the set_cell_value method to set the values of the cells you want to change. this is probably the "cleanest" method as it just updates the data in-place without re-initialising the whole grid.

[ollyhensby]

Hi @jobinnthomas, in your requirements.txt you are using ipydatagrid==1.1.15

Try updating to the latest release 1.2.1 where I resolved the issue of column widths resetting when setting new data if auto_fit_columns is set to True.

Here is the PR fixing that issue: #452

[jobinnthomas]

hi - if you set data in the way that you have, i.e.: mygrid.data = df_new you are effectively reinitialising the grid - you could give it a whole new dataframe with different col names when doing this. as such it doesn't resets behaviour you had previously applied. you can either:

• record the col widths before you set the grid and then reset them after (probs easiest)
• use the set_cell_value method to set the values of the cells you want to change. this is probably the "cleanest" method as it just updates the data in-place without re-initialising the whole grid.

Thanks for the suggestions.

• use the set_cell_value method to set the values of the cells you want to change. this is probably the "cleanest" method as it just updates the data in-place without re-initialising the whole grid.

  • I do know the number of rows before hands...So maybe I could create the Datagrid with the known number of rows, all
    blank and then resize the height of the datgrid to avoid showing them even. Then i could set the cells one by one.

• record the col widths before you set the grid and then reset them after (probs easiest)

  • This does not work............for whatever reason.

[jgunstone]

just checked this -
it doesn't look like it resets the col widths if the dataframe is the same

import pandas as pd
import ipydatagrid as DataGrid

df = pd.DataFrame({"a": [1,2], "b": [3,4]})
df1 = pd.DataFrame({"a": [3,4], "b": [5,6]})
gr = DataGrid(df, column_widths = {"a": 20})
gr

gr.data = df1

[jobinnthomas]

Try the example I provided.......Do you see what I see? Run it 15 times and see if the output changes.
If you don't, can you provide me your requirements file.....