How to get a visible root node in Virtual TreeView?












1















I am using Virtual TreeView and I need to select the root node when I click on the button. There is a RootNode property in TBaseVirtualTree, but based on the documentation, it is not used for enumeration. Also that root node is invisible and not the actual root of the whole tree.






delphi virtualtreeview







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  • What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

    – bunglehead
    Nov 21 '18 at 7:13











  • Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

    – bunglehead
    Nov 21 '18 at 7:14











  • @bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

    – Uli Gerhardt
    Nov 21 '18 at 9:36
















1















I am using Virtual TreeView and I need to select the root node when I click on the button. There is a RootNode property in TBaseVirtualTree, but based on the documentation, it is not used for enumeration. Also that root node is invisible and not the actual root of the whole tree.






delphi virtualtreeview







share|improve this question

























  • What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

    – bunglehead
    Nov 21 '18 at 7:13











  • Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

    – bunglehead
    Nov 21 '18 at 7:14











  • @bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

    – Uli Gerhardt
    Nov 21 '18 at 9:36














1












1








1








I am using Virtual TreeView and I need to select the root node when I click on the button. There is a RootNode property in TBaseVirtualTree, but based on the documentation, it is not used for enumeration. Also that root node is invisible and not the actual root of the whole tree.






delphi virtualtreeview







share|improve this question
















I am using Virtual TreeView and I need to select the root node when I click on the button. There is a RootNode property in TBaseVirtualTree, but based on the documentation, it is not used for enumeration. Also that root node is invisible and not the actual root of the whole tree.






delphi virtualtreeview




delphi virtualtreeview






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share|improve this question













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edited Nov 21 '18 at 14:44









Triber

8751126




8751126










asked Nov 20 '18 at 23:05









alanccalancc

4582822




4582822













  • What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

    – bunglehead
    Nov 21 '18 at 7:13











  • Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

    – bunglehead
    Nov 21 '18 at 7:14











  • @bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

    – Uli Gerhardt
    Nov 21 '18 at 9:36



















  • What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

    – bunglehead
    Nov 21 '18 at 7:13











  • Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

    – bunglehead
    Nov 21 '18 at 7:14











  • @bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

    – Uli Gerhardt
    Nov 21 '18 at 9:36

















What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

– bunglehead
Nov 21 '18 at 7:13





What's a name of the component? Is it third party or Delphi-standard? Which Delphi version?

– bunglehead
Nov 21 '18 at 7:13













Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

– bunglehead
Nov 21 '18 at 7:14





Is it really different from other nodes? From Win32 point of view you first locate a node identifier and then select it, must be something similar in your case. There is potential for multiple roots too.

– bunglehead
Nov 21 '18 at 7:14













@bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

– Uli Gerhardt
Nov 21 '18 at 9:36





@bunglehead The component is mentioned multiple times in title, body and tags. However I'm not sure which of the repos currently is the "official" one.

– Uli Gerhardt
Nov 21 '18 at 9:36












1 Answer
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1














Use code like the following to select the first node. Note that there is a separate function to get the first visible node (GetFirstVisible())



procedure TForm1.Button4Click(Sender: TObject);

var

  node: PVirtualNode;

begin

  node := VST.GetFirst();

  VST.Selected[node] := True;

end;





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    Use code like the following to select the first node. Note that there is a separate function to get the first visible node (GetFirstVisible())



    procedure TForm1.Button4Click(Sender: TObject);
    
var
    
  node: PVirtualNode;
    
begin
    
  node := VST.GetFirst();
    
  VST.Selected[node] := True;
    
end;





    share|improve this answer




























      1














      Use code like the following to select the first node. Note that there is a separate function to get the first visible node (GetFirstVisible())



      procedure TForm1.Button4Click(Sender: TObject);
      
var
      
  node: PVirtualNode;
      
begin
      
  node := VST.GetFirst();
      
  VST.Selected[node] := True;
      
end;





      share|improve this answer


























        1












        1








        1







        Use code like the following to select the first node. Note that there is a separate function to get the first visible node (GetFirstVisible())



        procedure TForm1.Button4Click(Sender: TObject);
        
var
        
  node: PVirtualNode;
        
begin
        
  node := VST.GetFirst();
        
  VST.Selected[node] := True;
        
end;





        share|improve this answer













        Use code like the following to select the first node. Note that there is a separate function to get the first visible node (GetFirstVisible())



        procedure TForm1.Button4Click(Sender: TObject);
        
var
        
  node: PVirtualNode;
        
begin
        
  node := VST.GetFirst();
        
  VST.Selected[node] := True;
        
end;






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 21 '18 at 8:06









        Tom BrunbergTom Brunberg

        13.2k62239




        13.2k62239
































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