i think you mean, that you want to use the MiscOptions.toGridExtensionswhich 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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