Sort on click only in specific row

grzegorz

Hi,

Is it possible to sort on click only in specific header row like in this example:

Rafael Maricca (LMD)

There is unfortunately no automatic way.  However if you implement sorting manually you can distinct which header row was clicked by handling the OnHeaderSectionCellClick event (where you have access to all properties of the clicked header cell). Example:

procedure TfrmLMDElXTree_MHeader.ElXTreeMHeaderHeaderSectionCellClick(

  Sender: TElXCustomHeader; Section: TElXHeaderSection; Cell: TElXHeaderCell);

begin

  Showmessage(IntToStr(Cell.RowIndex));

...

grzegorz

Is it possible to publish TCustomElXTree.OnHeaderSectionClick  sorting routine (as public method) that You using? I was looking in the source code and it's complicated (multisort etc.)

Best regards,
Grzegorz

Victor_Bocharov

TCustomElXTree.OnHeaderSectionClick uses complex logic of preparing sorting sections and sort modes for them.

However, this sorting routine itself is already public, it is procedure TElXTreeItem.Sort.

grzegorz

Yes I know but I need the all magic that the TCustomElXTree.OnHeaderSectionClick do before it's call  FItems.FRoot.Sort(true);
My idea was to use this like that:

void
__fastcall
TfoCalculationEngineTest::ElXTreeHeaderSectionCellClick(TElXCustomHeader
*Sender, TElXHeaderSection *Section, TElXHeaderCell *Cell)
{
    if(Cell->RowIndex == (Sender->RowCount-1))//only for last row
    {
        //I do something else (not sorting)
    }
    else
    if(Cell->RowIndex == (Sender->RowCount-2))
    {
        //I do sort trying to imitate sort click
       
        TElXTree* pTElXTree = dynamic_cast<TElXTree*>(Section->Owner->Owner);
        if(pTElXTree)
        {
            pTElXTree->OnHeaderSectionClick(Sender, Section);
        }
    }
}