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 Visual indication of Grouped Layers?
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PeterPanino

831 Posts

Posted - May 24 2023 :  16:34:58  Show Profile  Reply
The documentation says: "A GroupIndex of 0 means the layer is not grouped."

So this means: A GroupIndex > 0 means the layer is grouped. Is this correct?

Is it possible to get a visual indication of Layers that are grouped? (I.e., Layers with a GroupIndex > 0, e.g., a Group icon).

xequte

38060 Posts

Posted - May 24 2023 :  20:43:27  Show Profile  Reply
Hi Peter

Yes, GroupIndex > 0 means the layer is grouped. We'll look at adding a visual indication in a future version.


Nigel
Xequte Software
www.imageen.com
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PeterPanino

831 Posts

Posted - May 25 2023 :  00:34:09  Show Profile  Reply
Hi Nigel,

Thank you for the information.

I wrote this code to TOGGLE the selected Layers between Grouped and UnGrouped modes:

procedure TformMain.ButtonToggleLayerGroupingClick(Sender: TObject);
begin
  // Iterate through all selected layers (except background):
  with ImageEnView1 do
  begin
    LockUpdate();
    try
      var ThisGroupIndex := Random(Max_Int);
      for var i := 1 to LayersCount - 1 do
      begin
        if Layers[i].Selected then
        begin
          if Layers[i].GroupIndex = 0 then // if Layer is UNGROUPED
            Layers[i].GroupIndex := ThisGroupIndex
          else // if Layer is GROUPED
            Layers[i].GroupIndex := 0;
        end;
      end;
    finally
      UnlockUpdate();
    end;
  end;
end;


But to select only Grouped or only Ungrouped Layers to toggle, the user needs a visual indication of whether a Layer is Grouped or not Grouped. Otherwise, this code could not work as intended. Otherwise, I would have to implement TWO buttons: One for Grouping and one for Ungrouping.

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xequte

38060 Posts

Posted - May 25 2023 :  17:47:06  Show Profile  Reply
Hi

You might want to use one the drawing events to add an icon to the layer:

http://www.imageen.com/help/TImageEnView.OnDrawLayer.html

Nigel
Xequte Software
www.imageen.com
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xequte

38060 Posts

Posted - Oct 08 2023 :  23:44:49  Show Profile  Reply
FYI, in the next update a "Link" glyph is shown in the corner of selected layers of the same group.


Nigel
Xequte Software
www.imageen.com
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