How to add empty, non-selectable rows to a slickgrid? - javascript

I'm using Slickgrid to display tabular data retrieved via JSON. The number of the grid items varies greatly (approx. 1 - 50 grid rows) and the grid is reloaded often with new data during the page lifecycle.
To make my grid less "jumpy" (i.e. to avoid frequent changes of the grid height), I'd like to display the grid with a constant height of 10 rows. If the JSON resultset is less than 10 items, the grid should be filled up with empty rows. If it is more than 10 rows, I want to activate paging.
I already figured out how to fill up the grid with empty rows, however I don't want these to be selectable or editable. How can I achieve this?

Instead of loading it up with empty rows, why don't you just use a little bit of CSS?
div.slick-viewport {
height: 100px; /* or whatever 10*row_height is */
}

Related

How Do I Make Ctrl-f Always Work in Tabulator Plus Questions on Pagination and Height?

How do you make it possible to search for any item in the table regardless of the number of rows loaded using ctrl-f?
I have a large table consisting of over 10,000 rows.
So, far I have tried using Pagination. This works regardless of how large I change the "paginationSize".
Is there a way to make the pagination controls always visible regardless of paginationSize?
Right now setting the paginationSize to certain amounts will need a scroll bar to view the pagination controls.
Also when using pagination if I include a height to the table then ctr-f cannot find everything on any page.
How does the height setting affect the number of rows loaded?
How do I figure how many rows the table will load based on the height setting?
With both of those questions in mind, how do you know how many of the loaded rows will be searchable with ctrl-f
It says in the documentation "The virtual DOM renders a number of rows above and below the visible rows to ensure a smooth scrolling experience." What determines the number of rows above and below the visible rows?
Finally is there a better way to make ctrl-f always work on the table besides using pagination?
// Creating the tabulator table
var table = new Tabulator('#themeTestCaseMetricsTable', {
height:"100%",
pagination:"local",
paginationSize:100,
layout: "fitDataFill",
cssClass: "column data",
responsiveLayout: true,
tooltips: true,
// "safe" turns off auto-escaping
columns: {{columns|safe}},
data: {{rows|safe}},
persistenceMode: "local",
persistence: {
columns: true
}
});
Appreciate any help and feedback
Ctrl+f
Tabulator uses a virtual DOM to improve render efficiency on large data sets, this means that only the visible rows actually exist, as you scroll rows are created and destroyed in realtime as they become visible. therefore you cannot search the table in that way.
The ctrl+f feature of browsers is more of a convenience feature of browser and it is bad UX to expect your users to use this to find things, if you want users to be able to search a table, you should add a search input and use the built in table Filter Functionality. you can see an example of this on the Tabulator Home Page where it lets you filter the table by the name column
That being said you can disable the virtual DOM by setting the virtualDom property to false although this will result in the table no longer scrolling and the table will take a long time to load if displaying large data sets
var table = new Tabulator("#example-table", {
virtualDom:false, //disable virtual DOM rendering
});
paginationSize
You are having this issue because you are setting both a page size and a height, if you want the table to resize to fit the height of a page of data you should not set the height. if you would like the page to take up the height of the table you should not set the page size

Re-Size Ag-Grid to fit the number of rows

I am using Ag-Grid in an angular 8 application. I am trying to get the grid to re-size based on the number of rows but also want to restrict the number of rows in the grid to 10 and then use pagination to display the next page.
To restrict the number of rows in the grid to 10 I am using gridHeight = '400px' which works fine for the pages which have 10 rows. But lets say I have 33 rows of data and I display 10 rows each on the first 3 pages and the remaining 3 rows on the last page, the last page still have a gridHeight of 400px. Is there a way to make this dynamic so that the grid re-sizes for the 3 rows.
I know we can use domLayout='autoHeight' but that does not work with gridHeight. Any suggestions?
instead of using gridHeight = '400px' to restrict the number of rows in the grid to 10 you should use paginationPageSize property and set it to 10.
And like you mentioned while defining your grid options define domLayout property to 'autoHeight'. this will auto adjust grid height whenever there are lesser number of records in the grid.
here is some code snippet to help you out.
var gridOptions - {
defaultColdDef : {
...
...
},
--bunch of properties goes here
...
pagination : true,
//use pagination page size property to set height instead of using height style.
paginationPageSize : 10,
domLayout : 'autoHeight'
...
...
}
and here is a working demo

Change Ag-Grid infinite scroll block size?

Is there a way to change the block size when the row model used is "infinite" and a datasource is set?
I.e. when the datasource's getRows() is called, is there a way to set startRow and/or endRow? Default behaviour is to fetch 100 rows at a time which results in blank rows for me, since I only have about ~12 new data rows coming in at a time with infinite scroll. So, when getRows() is triggered, it'll try to fetch rows 100 to 200 (as an example) when there are only 45 data points in the first place. To compensate it adds a bunch of blank rows.
I've tried the following two additional grid options without success:
cacheOverflowSize: 2
infiniteInitialRowCount: 32
Fetching 100 rows at a time instead of 12 solves the issue, but I'd reeeeeally rather not do this (due to some design constraints of the product I'm working on).
Shoutout to #kamil-kubicki for their comment. cacheBlockSize was indeed what I was looking for. It didn't solve my whole problem though, so I'll outline my complete solution below.
I had ag-grid's row height set to the default 25px max. That meant that on load, when it was populating the initial data, it was coming close to rendering my entire initial data set of 32 items. On scroll, getRows() would then look for rows outside of the total data collection's bounds, so it added blank rows.
I changed how many data results are loaded on each scroll to 50. This is relatively large but it works and is performant for now, so I think I'll keep it.
For those with a similar problem:
Use cacheBlockSize in gridOptions
Make sure that your ag-grid isn't rendering anything close to your full initial data collection (e.g. if your collection is 32 items, don't render anything above like 16 items - control this by changing the height of your rows and the size of your grid)
Change how many data items are loaded in to your collection on scroll to a larger number; something that can populate data faster than the user can scroll. For me it was 50. For you it might be more, or less.

How can I find the height of a dynamically created table row element with no height set?

I have two tables adjacent to each other both being populated dynamically in C#, I want both of these two tables to have the corresponding row height be exactly the same depending on what the first tables row height is (no specific height has been set, just needs to fit text in).
I have tried various ways of getting the height in C#, javascript, jquery, etc however they all return null or 0, i can get it to work by actively setting the height however this is not very effecient and occasionally buggy, is there a way I can get the height of a dynamically created html table row/cell?
#JoseRuiSantos comment is a better implementation if your design allows it (i.e. combine data in both tables in to a single table and accordingly render rows and columns to display as two different tables using css).
One way I could think is to try using javascript:
For this to work, do not set any table/row/column heights in both tables.
Add an empty column at the end of each table with a div element in it. In the page load completed event, identify the max column height in corresponding row of both tables and set the corresponding div element's (in both tables) height (in corresponding row) to the column max height.

jqGrid - how to reset grid column widths?

If users manually resize jqGrid columns, how can you reset the column width back to whatever the original values were?
I don't believe that there are any built in methods for reseting the widths, leaving the option of recording them at creation and restoring them at a later point. Unfortunately, this functionality is the same as it was 10 months ago with column width being one of the few options that cannot be changed once the grid has been created. I even tried the newest version of the grid just to be sure (3.8.2) and it does not allow you to change the column sizes.
$('#jqGrid').getColProp(colName).width; //Properly retrieves value of column width
$('#jqGrid').setColProp(colName, {width: newWidth}); //Does nothing visually
$('#jqGrid').getColProp(colName).width; //Returns newWidth, although it doesn't show it on page
I don't know if it would be worth it, but you could try Oleg's solution here of destroying the current grid and creating a new one in its place. The practicality of this solution I suppose would be dependent upon how you are getting the data and how long it would take to re-bind the data to a new grid.

Categories