Answers

• k-george Posts: 26Questions: 3Answers: 0

  December 9

  Hi,

  We updated the test case sample as

  https://live.datatables.net/tuxohazo/12/edit

  for the below query.

  The method we illustrated there is good ? or have better solutions ?

  Using this initialization method / settings at

  https://live.datatables.net/tuxohazo/7/edit

  How to add

  table.on('draw', function() {}

  and

  drawCallback: function(settings) {}

  Hanna / George & friends.
• kthorngren Posts: 22,360Questions: 26Answers: 5,137

  December 9

  Have toggle column visibility button for some columns.

  See if the one of the Column Visibility examples does what you want.

  How to use / express each state visibility to do something ?

  Sorry I don't understand the question.

  How to make the length menu to any other number (for example 25 rows per page and total selections have 10, 20, 25. 50 etc.) rather than the first one as default setting ?

  Use lengthMenu.

  This updated example shows using drawCallback and draw.
  https://live.datatables.net/tuxohazo/13/edit

  It shows adding draw before Datatable initialization occurs with draw.dt. This is so the event fires during any draw functions during initialization. It also shows adding the event after which will fire on draw events after Datatable initialization. You can see this by performing either a search, sort or page action.

  Kevin
• k-george Posts: 26Questions: 3Answers: 0

  December 9

  Hi,

          For the column visibility state
  

  our question was

  how to state that

  if the condition that column 2 is visible

  if that true

  then do something {}.

  and vice versa.

  Similarly about the length menu

  For example

  lengthMenu: [10, 25, 50, 75, 100]

  here 10 is the state of the total rows per page ?

  So the query was

  how to

  make 25 or 50 as the default state

  and shown value.

  But the length menu contains the same value as mentioned above.

  Hope you understand it ?

  Martha
• kthorngren Posts: 22,360Questions: 26Answers: 5,137

  December 9

  if the condition that column 2 is visible

  Use column().visible() for this.

  make 25 or 50 as the default state

  Use pageLength for this.

  Kevin
• k-george Posts: 26Questions: 3Answers: 0

  December 11

  Hi,

          We face some issues 
  

  drawCallback: function (settings) {

  remaining code at https://live.datatables.net/tuxohazo/15/edit

  We try to add a class to the active / last clicked cell.

  That works well.

  But we use .text() to get the element.

  And the problem is

  if have any number of cells having the same text is added the applied class.

  We only needs to apply the current clicked cell only

  So how to achieve that ?

  Sarah.
• kthorngren Posts: 22,360Questions: 26Answers: 5,137

  December 11 edited December 11

  This is not a Datatables issue but an issue with how you are tracking the data. Same as the last time. You need to use a unique piece of data to restore the classes to the appropriate cell. I would look at saving the row ID plus column index, maybe use $(this).index(), instead of the cell's text. For example save each clicked cell as an array like this: [rowID, column index].

  Kevin