I'm working on creating a javascript based spreadsheet application. Right now I can dynamically create the spreadsheet as a table with a supplied number of rows and columns and a text input in each cell as can be seen in this picture.
I'd like to have a generic event tied to all of the inputs in the table in which I am able to determine the row index and column index of the input that fired the event. Something like this:
$('.spreadsheet-cell').click(function () {
var rowIndex = $(this).attr('rowIndex');
var columnIndex = $(this).attr('columnIndex');
});
I originally tried implementing things by dynamically adding row and column index attributes to the html input element when I create it but when I add rows or columns after the original spreadsheet has been created things get messy trying to shift the value of these attributes around. I think I could make that method work if it came down to it but it seems messy and I'd prefer not to mess around so much with the DOM when I figure that there is probably some way using jQuery to determine the relative index of the parent <td> and <tr>.
Use jQuery .index. Within your function:
var rowIndex = $("#table tr").index($(this).closest('tr'));
var colIndex = $("#table td").index(this);
Related
I'm using datatables plugin to create a datatable. I've put a button to add new rows. The new inserted row can be anywhere depends on which column the table is sorted by. I need to set an event to the button inside the row once it is inserted. So I have to get the last inserted row to do so. But I can't find a way. I've tried below but it's not working. index() does not returning exact index where the row really is.
var row = table.row.add({...});
row.draw();
var tr = $('#datatable tbody tr').get(row.index());
Please help. Your answer is kindly appreciated and thank you in advance.
Take length of table and -1 and that number is the index of last
tr
var lastRowIndex = $('#datatable tr').length -1;
New rows will be appended onto the end of the row list, so you can do something like this
table.row(table.rows().count()-1)
See fiddle here.
Can't find a way to this using any plugin's provided function. But thank God there's a workaround.
Flag the inserted row in column rendering function. For example, I append a tag
datatable = $('#datatable').DataTable({columns : [{render : function(){... <last/> ...}}]});
On inserting new row, insert it with a data that indicate the flag inclusion. Get the row by the flag. And then remove the flag.
datatable.row.add({...}).draw();
var row = $('last').parents('tr');
$('last').remove();
For any other case which don't need to edit the <tr> explicitly, get the index of last inserted row. Get the datatable row and update the data. Set column render function to render the updated row accordingly.
var i = datatable.rows().count() - 1;
var data = datatable.row(i).data();
datatable.row(i).data(changeSomething(data)).draw();
And to remove the row
datatable.row(i).remove().draw();
How can I reach the first row and the first column (using javaScript) from a table in specific URL?
for example in the following URL:
https://www.w3schools.com/jsref/dom_obj_table.asp
In 'Table Object Methods', I want to get "createCaption()" .
Thanks!
you can try this...
you get value into rows of table HTML.
var row = document.getElementById("myTable").rows[0].innerHTML;
Using css you can do
var elem = element.all(by.css('table tr:nth-child(2) td:nth-child(1)').last();
This selects the first column from the second row that is in a table.
Using element.all because there are 3 tables it could apply to, which is why you need the .last() because the table you wanted referenced was the last table. Would work better if the table has an unique ID to reference it with.
I am working on making an editable Datatable using Jeditable. I need to be able to dynamically add rows, which I have successfully done. By default, it appears that Datatables will add everything with a row_id of 0, which makes it impossible to differentiate added rows from each other.
So I am working on a function that assigns the row_id. There are no errors, but it also does not seem to work as it still returns a row_id of 0 for all added rows.
$('#addRow').on( 'click', function () {
var rowIndex = $('#example').dataTable().fnAddData([ "column1Data", "column2Data"]);
var row = $('#example').dataTable().fnGetNodes(rowIndex);
$(row).attr('id', row_id_counter);
row_id_counter ++;
Entire code:
http://jsfiddle.net/j2frzerj/
I tested your code in the fiddle provided, and it is adding new table rows with sequential id's, starting with index 0. I am not seeing any duplicate id's of 0?
http://prntscr.com/ew3tg9
http://prntscr.com/ew3tlr
I'm trying to get the control which is inside of a cell table; in my table I have different controls, labels, checkboxes, etc.
I basically need to get the control which is used in that table
var x = document.getElementById('myTable').rows[0].cells;
alert(x[0].innerText);
//alert(x[3].innerHTML);
if (x.Control == checkbox) {
x.checked = true;
}
This will be in a loop but for now I just need to be able to check the checkbox by grabbing the control and setting that control to true
Any hints/help would be great
I doesn't really understand what you exactly need is it
document.getElementById("checkbox").checked = true;
here checkbox is the id of a particular checkbox
I would put a unique id on the form element instead and use that to grab it. In this way you can change the structure in the future. Example: perhaps you no longer want to use a table grid, but a grid of divs.
When you use innerHTML you will might also grab textnodes and other things you put in the cell.
An alternative - if you really want to find a specific cell in a table - is to give each cell a unique id on the form "cell-4-5" where 4 is the row and 5 is the column.
[EDIT]
If you want to have the cell contents returned as a DOM-object then childNodes can be used:
var x = document.getElementById('myTable').childNodes[0].childNodes[0].childNodes
If you want to have the cell contents returned as a string then innerHTML can be used:
var x = document.getElementById('myTable').childNodes[0].childNodes[0].innerHTML
To check if the checkbox is checked you need to keep it as a DOM element and thus use the first version.
I have two distinct gridpanels and throughout my code, whenever value of one of the cells in Grid1 changes I want to be able to change value of certain cells in the Grid2,
How can I change the css of the second grid from within the Grid1.
The following allows me to change the css for an entire row in Grid2 but I need to be able to change the css for a cell of Grid2 row: 2, column 3
var Grid2Store= Ext.data.StoreManager.get("MainComparisonStore");
Grid2.getView().addRowCls(Grid2Store.getAt(2), 'orange-bar');
Get a hold of the element and you can use cellElement.addCls('orange-bar');. See Ext.dom.Element.addCls() documentation. I put together a jsFiddle for you to see an example. Just click the "Test" button in the grid toolbar.
Here is the code that does the work. It is hard coded to add a class to column 1, row 1.
var grid = Ext.getCmp('myGrid');
var column = grid.columns[1];
var record = grid.store.getAt(1);
var cell = grid.getView().getCell(record, column);
cell.addCls('orange-bar');
Here (Sencha Forum) is some discussion on how to get the cell. This is what I used to put together my example. You can see how you could make a helper like getCell(rowIndex, columnIndex) pretty easily.