Multiline strings in Bokeh Datatable - linebreaks getting stripped

On Friday, March 11, 2016 at 12:33:57 PM UTC-8, Vivek Gani wrote:

Hi, I’m trying to show a table of strings using Bokeh (I’m already using bokeh plots within a vplot+tabs, and wanted a table of data also in the vplot).

My strings are multiline via having ‘\n’ characters, but when attempting to display these within a Bokeh DataTable the line breaks are stripped (see attached screenshot) Any way to avoid this?

Environment: Python 3.5, Jupyter 1.0 / Notebook 4.1.0, bokeh 0.11.1

Question is also on stackoverflow (http://stackoverflow.com/questions/35949219/bokeh-wont-show-string-linebreaks-in-datatable) and sample code is at https://github.com/seltzered/Bokeh-multiline-datatable-demo

Thanks in advance,

Vivek

On Mar 12, 2016, at 1:33 PM, Vivek Gani <vivek@gani.org> wrote:

Just a small update - I ended up deciding to just work within the bounds and just using color to group & differentiate things.

The issue doesn't appear to be due to bokeh, it's more of a limitation of slickgrid - there's some workarounds / slickgrid forks posted out there for those really looking for a solution to have multitline grids, but haven't seen anything officially merged in.

On Friday, March 11, 2016 at 12:33:57 PM UTC-8, Vivek Gani wrote:
Hi, I'm trying to show a table of strings using Bokeh (I'm already using bokeh plots within a vplot+tabs, and wanted a table of data also in the vplot).

My strings are multiline via having '\n' characters, but when attempting to display these within a Bokeh DataTable the line breaks are stripped (see attached screenshot) Any way to avoid this?

Environment: Python 3.5, Jupyter 1.0 / Notebook 4.1.0, bokeh 0.11.1

Question is also on stackoverflow (jupyter - Bokeh won't show string linebreaks in Datatable - Stack Overflow) and sample code is at GitHub - seltzered/Bokeh-multiline-datatable-demo: Attempt to have multiline strings in a datatable. Currently having issues.

Thanks in advance,

Vivek

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On Sat, Mar 12, 2016 at 12:15 PM Bryan Van de Ven bryan@bokeh.org wrote:

Sorry for the slow response, I was going to say I think it is a SlickGrid limitation which is unfortunate. If you do (or did) find anything that seems like it might be a useful or workable workaround (or even a modification we could make to our vendored version of slickgrid) please don’t hesitate to open a GH issue.

Thanks,

Bryan

On Mar 12, 2016, at 1:33 PM, Vivek Gani vivek@gani.org wrote:

Just a small update - I ended up deciding to just work within the bounds and just using color to group & differentiate things.

The issue doesn’t appear to be due to bokeh, it’s more of a limitation of slickgrid - there’s some workarounds / slickgrid forks posted out there for those really looking for a solution to have multitline grids, but haven’t seen anything officially merged in.

On Friday, March 11, 2016 at 12:33:57 PM UTC-8, Vivek Gani wrote:

Hi, I’m trying to show a table of strings using Bokeh (I’m already using bokeh plots within a vplot+tabs, and wanted a table of data also in the vplot).

My strings are multiline via having ‘\n’ characters, but when attempting to display these within a Bokeh DataTable the line breaks are stripped (see attached screenshot) Any way to avoid this?

Environment: Python 3.5, Jupyter 1.0 / Notebook 4.1.0, bokeh 0.11.1

Question is also on stackoverflow (http://stackoverflow.com/questions/35949219/bokeh-wont-show-string-linebreaks-in-datatable) and sample code is at https://github.com/seltzered/Bokeh-multiline-datatable-demo

Thanks in advance,

Vivek

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On Sun, Mar 13, 2016 at 11:14 AM Dennis O’Brien dennis@dennisobrien.net wrote:

Hi Vivek

You might try the HTMLTemplateFormatter

https://github.com/bokeh/bokeh/blob/master/bokeh/models/widgets/tables.py#L198

You can supply a template that is any HTML as a template with slots for the values. An example from the docstring:

HTMLTemplateFormatter(template=‘<%= value %>’)

You could try a pre tag to preserved the newlines.

Let me know how that goes. I added the HTMLTeamplateFormatter in order to support links and images in a DataTable, but it should work for arbitrary HTML formatting.

cheers,

Dennis

On Sat, Mar 12, 2016 at 12:15 PM Bryan Van de Ven bryan@bokeh.org wrote:

Sorry for the slow response, I was going to say I think it is a SlickGrid limitation which is unfortunate. If you do (or did) find anything that seems like it might be a useful or workable workaround (or even a modification we could make to our vendored version of slickgrid) please don’t hesitate to open a GH issue.

Thanks,

Bryan

On Mar 12, 2016, at 1:33 PM, Vivek Gani vivek@gani.org wrote:

Just a small update - I ended up deciding to just work within the bounds and just using color to group & differentiate things.

The issue doesn’t appear to be due to bokeh, it’s more of a limitation of slickgrid - there’s some workarounds / slickgrid forks posted out there for those really looking for a solution to have multitline grids, but haven’t seen anything officially merged in.

On Friday, March 11, 2016 at 12:33:57 PM UTC-8, Vivek Gani wrote:

Hi, I’m trying to show a table of strings using Bokeh (I’m already using bokeh plots within a vplot+tabs, and wanted a table of data also in the vplot).

My strings are multiline via having ‘\n’ characters, but when attempting to display these within a Bokeh DataTable the line breaks are stripped (see attached screenshot) Any way to avoid this?

Environment: Python 3.5, Jupyter 1.0 / Notebook 4.1.0, bokeh 0.11.1

Question is also on stackoverflow (http://stackoverflow.com/questions/35949219/bokeh-wont-show-string-linebreaks-in-datatable) and sample code is at https://github.com/seltzered/Bokeh-multiline-datatable-demo

Thanks in advance,

Vivek

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On Sunday, March 13, 2016 at 2:17:13 PM UTC-7, Dennis O’Brien wrote:

I just tried using HTMLTemplateFormatter and it did not work. As Vivek points out in the SO post, this is a limitation of slickgrid which assumes uniform height of rows for performance reasons. This post describes the problem and several forks to address it. http://stackoverflow.com/questions/2805094/is-variable-rowheight-a-possibility-in-slickgrid

And some relevant issues in the slickgrid project:

https://github.com/mleibman/SlickGrid/issues/122

https://github.com/mleibman/SlickGrid/issues/506

https://github.com/mleibman/SlickGrid/pull/426

From what I understand, slickgrid does not plan on supporting variable or dynamic row heights. There are a few forks that do, but there are questions about performance, quality of implementation, and maintenance of these.

cheers,

Dennis

On Sun, Mar 13, 2016 at 11:14 AM Dennis O’Brien den...@dennisobrien.net wrote:

Hi Vivek

You might try the HTMLTemplateFormatter

https://github.com/bokeh/bokeh/blob/master/bokeh/models/widgets/tables.py#L198

You can supply a template that is any HTML as a template with slots for the values. An example from the docstring:

HTMLTemplateFormatter(template=‘<%= value %>’)

You could try a pre tag to preserved the newlines.

Let me know how that goes. I added the HTMLTeamplateFormatter in order to support links and images in a DataTable, but it should work for arbitrary HTML formatting.

cheers,

Dennis

On Sat, Mar 12, 2016 at 12:15 PM Bryan Van de Ven bry...@continuum.io wrote:

Sorry for the slow response, I was going to say I think it is a SlickGrid limitation which is unfortunate. If you do (or did) find anything that seems like it might be a useful or workable workaround (or even a modification we could make to our vendored version of slickgrid) please don’t hesitate to open a GH issue.

Thanks,

Bryan

On Mar 12, 2016, at 1:33 PM, Vivek Gani vi...@gani.org wrote:

Just a small update - I ended up deciding to just work within the bounds and just using color to group & differentiate things.

The issue doesn’t appear to be due to bokeh, it’s more of a limitation of slickgrid - there’s some workarounds / slickgrid forks posted out there for those really looking for a solution to have multitline grids, but haven’t seen anything officially merged in.

On Friday, March 11, 2016 at 12:33:57 PM UTC-8, Vivek Gani wrote:

Hi, I’m trying to show a table of strings using Bokeh (I’m already using bokeh plots within a vplot+tabs, and wanted a table of data also in the vplot).

My strings are multiline via having ‘\n’ characters, but when attempting to display these within a Bokeh DataTable the line breaks are stripped (see attached screenshot) Any way to avoid this?

Environment: Python 3.5, Jupyter 1.0 / Notebook 4.1.0, bokeh 0.11.1

Question is also on stackoverflow (http://stackoverflow.com/questions/35949219/bokeh-wont-show-string-linebreaks-in-datatable) and sample code is at https://github.com/seltzered/Bokeh-multiline-datatable-demo

Thanks in advance,

Vivek

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