Quite possibly. I can't remember which other properties I had to set (and there are a lot of properties!), but IIRC I had a bit of trouble tracking down the Columns one. C.
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kyley Harris Sent: Monday, 12 November 2007 4:50 p.m. To: NZ Borland Developers Group - Delphi List Subject: Re: [DUG] Soft-Gems Virtual TreeView for a ListView i think you mean, that you want to use the MiscOptions.toGridExtensions which makes it behave more like a grid, rather than a tree. There is a demo for this. On Nov 12, 2007 4:42 PM, Ross Levis < [EMAIL PROTECTED]> wrote: Thanks for that. I think I get it now. If I define 5 columns in the Columns property then the component will call the OnGetText event 5 times for each line (node). I just have to work out what NodeData := Sender.GetNodeData(Node) does but there are examples for this so I should be right, thanks. Ross. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Conor Boyd Sent: Monday, 12 November 2007 4:06 p.m. To: NZ Borland Developers Group - Delphi List Subject: RE: [DUG] Soft-Gems Virtual TreeView for a ListView The Header property of TVirtualStringTree has a Columns property. Specify your columns in there. Then the OnGetText event has a Column parameter. So you can do something like this in your OnGetText event handler: procedure TFileSelectionDialog.vstFilesGetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: WideString); var NodeData : PTreeViewNodeData; begin NodeData := Sender.GetNodeData(Node); CellText := ''; case Column of 0: CellText := ExtractFileName(NodeData.Filename); 1: begin if not NodeData.IsFolder then CellText := DateTimeToStr(NodeData.FileDate); end; end; end; This is from when I wrote our own file selection dialog, since the built-in Delphi one can't cope with more than a certain number of files (if you're interested in the specifics, IIRC the number of files the built-in one can cope with is limited to the number of fully qualified paths which will fit into 32000 bytes or something - it's a problem with the underlying WinAPI). Hopefully that's enough to get you going. Ask away if you've got more questions. HTH, Conor ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ross Levis I think someone mention they were using Virtual TreeView recently. I heard that it can be made to look like a standard ListView, so I'm investigating it to replace a TListView in an app of mine which takes far too long to load up to 20,000 items. I can't use TListView in virtual mode as it seems way too difficult to enable sorting on columns which I need. The Virtual TreeView appears to handle sorting as easy as TListView does in non-virtual mode. I'm just having difficultly working out how the use the component! I realize I need to set up a record for each set of data but I can't work out how to add columns of data. The examples are mostly involved with tree structures. I'm hoping someone can quote for me a basic piece of code for adding say 2 items with 2 or 3 columns. _______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: [email protected] Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to [EMAIL PROTECTED] with Subject: unsubscribe -- Kyley Harris Harris Software +64-21-671-821
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