virtualtreeview

My tree has 2 levels of nodes - it's a Contact List style tree. My problem is, that I would like to have every contact checked, in all the "Contact Categories". Here is a screenshot of my contact list as it looks now (And yes, I have permission to post it) As you see, Todd Hirsch is checked in the Category Test Category , but not in All Contacts . What I am trying to achieve, is to have a contact have the same checked status in every category. Example: I check Todd Hirsch in the Test Category - Todd Hirsch is automatically checked in All Contacts (And every other category). If I check Todd

I would like to add roots to a VirtualTreeView http://www.delphi-gems.com/index.php/controls/virtual-treeview with a thread like this: function AddRoot ( p : TForm1 ) : Integer; stdcall; begin p.VirtualStringTree1.AddChild(NIL); end; var Dummy : DWORD; i : Integer; begin for i := 0 to 2000 do begin CloseHandle(CreateThread(NIL,0, @ADDROOT, Self,0, Dummy)); end; end; The reason for this is that I want to add all connections from my INDY Server to the TreeView. Indy's onexecute/onconnect get's called as a thread. So if 3+ connections come in at the same time the app crashes due to the TreeView.

I'm currently using this code in the OnBeforeCellPaint event of my tree: if Node.Index mod 2 = 0 then begin TargetCanvas.Brush.Color := clBlack; TargetCanvas.FillRect(CellRect); end else begin TargetCanvas.Brush.Color := clPurple; TargetCanvas.FillRect(CellRect); end; To color my nodes. But with hidden nodes this doesn't work as the index stays the same. Is there an visible index or an easy workaround? Thanks in advance. There is no such method to get visibility node index at this time. But you can make your own where you will iterate through the visible nodes and count each iteration.

The VirtualStringTree header has a 'Background' property but setting it to a different color does not change the color. I suspect the tree is rendered using Windows themes. How can I set the color? You can use property THeader.Background but you'll have to exclude toThemeAware from TreeOptions.PaintOptions . That would turn off themes, as TLama already said in his comment above. I recommend you to use the events OnAdvancedHeaderDraw and OnHeaderDrawQueryElements . hoOwnerDraw has to be included in Header.Options for them to take effect. In OnHeaderDrawQueryElements you set Elements to (at

Is it safe to change VirtualTreeView data from the secondary thread ? And if yes, should I use critical sections (or even Synchronize method) ? I'm afraid that when I'll be writing to the VT's data record from the other thread, main thread invokes its repaint meanwhile and this refresh will cause reading of the same record at one time. I would supplement I'm using only 2 threads in the application. Something like ... type PSomeRecord = ^TSomeRecord; TSomeRecord = record SomeString: string; SomeInteger: integer; SomeBoolean: boolean; end; ... var FCriticalSection: TRTLCriticalSection; // global