Prevent collapsing item list of TCheckComboBox

[Hansvb]

Hi,

I want to be able to select a number of combobox items. Apparently this can be done with a TCheckComboBox.
How do I prevent the list from collapsing after each item selection? I cant find an option for it. And is it possible to create some distance between the items? See attachment, the items are next to each other.
Or is there another component that is better suited for selecting multiple items and if necessary add a new item?

[jamie]

With out subclassing the list window which I am sure is only possible in windows, where you can get the actual list window handle to caption the close event, you can do following. Not sure if this is cross platform either.

Code: Pascal  [Select][+][-]

1. procedure TForm1.CheckComboBox1KeyDown(Sender: TObject; var Key: Word;
2.   Shift: TShiftState);
3. begin
4.    With TCheckComboBox(Sender) do
5.    Begin
6.    IF (Key = VK_Space) Then
7.     begin
8.       DroppedDown := true;
9.     end;
10.    end;                                  
11.  
12.  

This will of course cause the list to close and reopen but at least it should be where you were act before using the space key.

[wp]

Or is there another component that is better suited for selecting multiple items [...]?

The TCheckComboboxEx in the ExCtrls package (https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/components/exctrls/) collapses the dropdown only when [ENTER] or [ESC] are pressed or when an item is double-clicked.

[Sieben]

You might also want to consider a TCheckListBox, which can be viewed as a permanently dropped down list. Drawback is of course that it also permanently consumes space.

[jamie]

if you use a data Module and drop a TlistCheckBox on that, you can at any time show that box with the parent set and position set just under what looks like an editbox etc.

This can be shown whenever the edit box becomes focused.

 

[Hansvb]

Thanks, i will look at the options. For now i parked the idea of using a tcheckedcombobox