Scrollable HTML table with top row and left column frozen - javascript

Has anyone been able to implement a scrollable table in HTML where the TOP row and LEFT columns are frozen, but the rest of the table is scrollable? A perfect example of this is:
Google Squared
I tried to reverse engineer the code for the google squared table, but I have been unsuccessful so far.
Note: I need the ability to FREEZE the TOP ROW and the LEFT COLUMN at the same time.

There's a working example at http://ajaxian.com/archives/freeze-pane-functionality that should be easy to duplicate. Be sure to note the comments -- many of the users have made helpful suggestions for improving the script.
Per #Nirk's request, a direct link to the active demo is at http://www.disconova.com/open_source/files/freezepanes.htm.

Go with a basic structure like this-
table
row
column (blank)
column
table (1 row high, column headers)
row
column
table (1 column wide, row headers)
column
div (fixed height & width, overflow auto)
table (actual data)
Set a fixed table-layout and specify column widths in pixels explicitly. You should be able to achieve the same effect.

i have a version of this in use (for a Gantt-chart style display).
it uses 3 tables: 1 for left column (the rows), 1 for top (columns), and then the data.
you need to work hard to get the cells to match sizes with the ones they match up to (
table layout-fixed can help achieve this).
The tables then are placed in some divs; the left and top divs have (as suggested above) height & width and overflow-auto in their css.
You then hook up some javascript to sync the scrolling of the left / top divs with the inner one...
As I recall there was a fair bit of 'curse-and-try-again', but it can be done with minimal js.
hth

If you use jQuery there's a lot of plugins for tables with fixed head.

You need Scrollable (jQuery plugin)
Demo is here

Related

How can I make ExtJS treecolumn scroll horizontally only the content and not the header

Let's assume I have a tree grid with a single column, the treecolumn. The width of the panel is 200px, and when expanding, some records have a wider text than 200px. Currently, Ext will apply an ellipsis property on those cells. What I want to do is to show horizontal scrollbar in the bottom which will update at every expand/collapse event. To accomplish this I used column autoSize() function which increase the column size to fit the content and automatically show the scrollbar in the bottom. But, increasing the column width increase also the column header width, which I don't want. Is there a way to keep the header width at 200px and increase only the column content width, keeping the scrollbar in the bottom?
Thanks in advance!
Eventually I found a way, but as #Alexander suggests in his comment, I had to enter the Ext code and mess with it. In fact what I've done was to remove the horizontal scroll partner corresponding to header as follows:
var headerScroll = myTree.getDockedItems()[0].getScrollable();
mytree.getView().getScrollable().removePartner(headerScroll, "x");
removePartner() is a private function so I should not use it, but in this particular case I don't think will harass the rest of the code.

How to design data structure for a specific table header

All:
I am not good at Data structure, currently what I want to build is a table with two-row header(just like excel, you use the first two row as header, the first row may have several column merged together, and under it(in the second row), there are several columns ), and the crucial feature is it allows user to adjust column width by dragging column(in the second row) right side border.
Current the main difficulty for me is: how to design a data structure to make according column respond to the dragging action, for example:
the columns with black text can be dragged by right side border, and when resize, it only affect the left border position of the column next to it on the right side. The grey column will change accordingly(I am thinking it like event handler, once you drag something under it, it will get updated too) if the total width of the columns under it changed.
Thanks

React.js FixedDataTable - Row heights are not evaluated when table is re-rendered - scrollbar is missing

I have dynamic data in my table. The amount of data in a cell may change. I have implemented a rowHeightGetter method to calculate the height of a row. When I add content to a cell and rerender my table, the content appears and the cell is larger, but if the additional content caused overflow, scrollbars do not show up. Please see the jsfiddle and click on a row. You'll see that you can no longer access the bottom row of the table until you click a second time.
https://jsfiddle.net/3cooper/ed7Ltc6o/1/
It appears that _calculateState() is not getting the actual row heights from the rowHeightGetter methods when it calls
var scrollContentHeight = this._scrollHelper.getContentHeight()
At this point it is getting the height of the rows by checking the rowHeight property on the table. I see in _calculateState() there are other calls that eventually call this._scrollHelper._updateHeightsInViewport() to properly get the height. Should this be done again. Just really started looking into this today - so I could be missing something obvious. Thanks.
Is there a better way to handle this?
Update:
Also, I notice that once a scrollbar appears so that the contents can scroll, if you click a row again, the table with shift down but the scrollbar will not adjust. Then once you start to scroll up the scroll jumps to the correct position and allows you to scroll the entire table correctly.

Make column width same for 2 tables

I am trying to implement a table structure in which the header remains fixed when i scroll down. I have used 2 tables for this purpose. The first table has the header values and the second table have the corresponding data(length of data in each column might vary as the data is populated dynamically). The problem is that the header width and data column width are not matching exactly.
I have written some code like shown below to dynamically alter the column width
$('#tdCheckAllBody').width($('#tdCheckAllHead').width());
$('#tdLoginBody').width($('#tdLoginHead').width());
$('#tdStatusBody').width($('#tdStatusHead').width());
$('#tdFNameBody').width($('#tdFNameHead').width());
$('#tdLNameBody').width($('#tdLNameHead').width());
$('#tdCompBody').width($('#tdCompHead').width());
But it doesnt seem to work properly. Any help appreciated.
Use this method
$(window).scroll(function(){
$("#id of the table header").offset({top:$("#id of the control which u placed the scrolling").scrollTop()});
});
Created a working fiddle for this:
http://jsfiddle.net/terjeto/dx7H5/
Offcourse if your case is different, you might need to tweak a litle. In my opinion the problematic areas are if the table use dynamic or % width and coping with the "auto" scrollbar which takes up approx 18px, and offcourse if the table needs horizontal scrollbars it complicates things a litle needing the onscroll event.
Could it be that your exmple is not accurate because of lacking reset-css code?
I use this: http://developer.yahoo.com/yui/reset/

Table Row SHOW / HIDE *Without* Column Width Resizing, w/ TableLayout: auto

I have table with multiple rows, showing items for sale. When the user clicks on a row, a Javascript inserts / shows a new row right beneath it with details about the item. The issue is when the description is long, it forces the column widths to readjust / resize. This shifts the columns positions and is really annoying, especially for the user. Right now, I have my table.style.tableLayout: auto. I actually prefer it this way, because the columns are adjusted to the content.
My question is: how do I dynamically "lock" the widths of the columns in my table so that when I insert / show the new row, the columns do not readjust / resize?
I've tried:
dynamically setting the table to temporarily "tableLayout: fixed"
inserting / showing my new row
changing the table back to "tableLayout: auto"
Actions 1 & 2 works in in FireFox, but not in Safari and IE (6 & 7). However, doing all three seems to prevent the columns from shifting too much.
The frustration is unbearable ... loosing lots of sleep ... please help!
Thanks.
For those looking for the code (this is done in jQuery). This also assumes the first row has the proper widths for each cell. Pretty easy changes if needed.
$('table.class_of_table_to_fix tr:first td').each(function() {
$(this).css({'width': $(this).width()+"px"});
});
I would set a percent width on each column simply as a guide. Set it just once on the TH of each column. The browser will still adjust the columns to content if necessary, but the columns will stay in place more consistently.
Next, I would never put css "white-space:nowrap" anywhere on that table. A long description should not break the table layout, it should wrap around properly on multiple lines, and be readable if you set the widths on each column to suit the type of data. Similarly I would keep the use of (non breakable spaces) to dates, times and numbers and allow the text to wrap.
Other than that, I do this at my job on a dialy basis, and there's a time when you need to stop ulling hairs asking the browser to do something it's not designed to do. Content should flow and adapt. Locking column widths to pixels is 99.99999% of the time a bad idea.
PS: If you really, reeally, REALLY need to lock columns, the only solution I'm aware of that works with CSS2 and accross all browsers is to use images. You could insert a 1px high transparent gif image in each column, and counting in the padding of the cells (TD), set a pixel width on each image (IMG), instead of on the columns (TH/TD). You could hide those in the TH for example. You can leave the images at 1 pixel wide and set percent widths on TDs, and when you open a new row, you would get each column width minus TD Padding, and set that to the corresponding IMG. I haven't tried! I just know that in many projects I've worked on, I've used small gif images to lock a minimum vertical spacing between columns, for example.
I had a similar problem when I was implementing a table with groups that could be toggled. I wanted the initial ratio between the columns to stay the same without fixing the widths of the columns. By default the browser would change the widths depending on the visibility of the table's rows, which was undesirable.
I went ahead and followed #faB's suggestion of applying percentages, but doing so using a small script that would calculate the percentages of the th elements and apply them after the initial render. This made my columns stay the same width, even with all rows hidden.
Here's the script, which uses jQuery:
(function($){
var lock_widths = function() {
var total_width = $('table').innerWidth();
var headers = $('table th');
var leftover = 100;
$.each(headers, function(ix, el) {
var header = $(el), width;
// on the last call use the leftover percentage
if (ix == headers.length - 1) {
width = leftover;
} else {
leftover -= width = header.outerWidth() / total_width * 100;
}
header.css({'width': width + '%'});
});
};
$(document).ready(lock_widths);
})(jQuery);
Tested in IE7+, Firefox and Chrome. This works for my special case because I have header columns as a reference, but it could be rewritten to measure some other columns.
You can display the details of the row beneath the clicked one in DIV and set its
style="overflow:auto";
so that details will wrap and scrollbar will be available to display entire text.
I don´t know if you´re familiar with jquery, but that´s what I would use - in combination with a separate class for the column that´s causing resizing in the new row - to:
Calculate / get the with of the column
Set the with of the afore mentioned class
Add the row
I haven´t tried it, but that should do it.
By the way, there are probably other ways to do it, I´m just more familiar with jquery (for point 1. and 2.).

Categories