[Lazarus] Treeview Question

zeljko zeljko at holobit.net
Tue Jun 30 09:09:36 CEST 2020

On 6/30/20 1:10 AM, Martin via lazarus wrote:
> Hi,
> I'm porting an application I started (but never finished) in Pyside to 
> Lazarus. This question is only about cosmetics as Treeview works as I 
> want it to.
> In Pyside I could set a space between nodes by setting the node text as 
> "" and disabling that node so it never gets selection, e.g.
>      self.tvSpace001 = QTreeWidgetItem(self.leftTreeWidget)
>      self.tvSpace001.setText(0, "")
>      self.tvSpace001.setDisabled(True)
> In Lazarus there seems to be no disabled property for nodes, so when 
> transversing a node with text "" with the keyboard, it will move onto 
> that empty node but not highlight it, when I would prefer it instead 
> moved onto the next or previous node and highlight it.
> I could write a workaround, storing the last node index, working out if 
> the user has moved up or down, checking if the text is "" and 
> highlighting the previous or next node as required, BUT I just wondered 
> if anyone has a more simple, more elegant solution please?
> It's only to show visual definition between groups of parents and childs 
> and doesn't actually affect how the application works.

Lazarus uses it's own implementation of TTreeView, so you have to create 
your own LCL wrapper for QTreeWidget.


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