I am working with TVirtualStringTree, and I would like to display a 'delete' icon when the user hovers over a specific node or the node is selected.
Example in VSCode Explorer View:
Is GetImageIndex the correct method to achieve this?
How can I handle the click event?
I tried the OnHotChange Event, but I couldn't figure out what to do with it. My solution uses GetImageIndex:
procedure TForm1.VstGetImageIndex(Sender : TBaseVirtualTree; Node : PVirtualNode; Kind : TVTImageKind; Column : TColumnIndex; var Ghosted : Boolean; var ImageIndex : TImageIndex);
begin
case Kind of
ikNormal, ikSelected :
case Column of
COL_NUM: begin
if (Vst.HotNode = Node) then begin
ImageIndex := DEL_IMAGE_IDX; // Vst.Images should be set
end else begin
ImageIndex := -1;
end;
end;
end;
end;
end;
OnClick is also easy:
procedure TForm1.VstNodeClick(Sender : TBaseVirtualTree; const HitInfo : THitInfo);
begin
if hiOnNormalIcon in HitInfo.HitPositions then begin
Vst.DeleteNode(HitInfo.HitNode);
Exit;
end;
// every other click handling ...
end;