C++/VB - End-user deselecting all items in a Tree-View conrol

Asked By Edward Diener

11-Nov-09 02:36 PM

How does an end-user deselect all items in a Tree-View control ? I know
I can do this programatically, but I need to test when end-user does this.

In general where can I find information about keyboard/mouse
manipulation of Windows controls and UI by an end-user.

12-Nov-09 06:36 AM

Normally just clicking an empty part of the window or selecting a new item.

I did not think the treeview had multiselect without doing it yourself.


I am not sure of an end user reference, but the SDK sometimes documents this.

--
Dee Earley (dee.earley@icode.co.uk)
i-Catcher Development Team

iCode Systems

12-Nov-09 10:57 AM

Selecting a new item obviously does not deselect all items. If I click
another part of the window it does not deselect the item selected.


You are correct. It is single select. But I believe there is some way
for the end user of deselecting the currently selected item without
selecting another item. If there is, I need to test this out.


I could not find anything in the MSDN docs about end-use user
keystrokes/mouse for controls. Maybe it is there somewhere but I did not
see it. It should surely be somewhere.

13-Nov-09 05:13 AM

I would not say it is obvious...
Especially as the first one I tried did.

Having said that, I do have this in mousedown:
Set FeedList.SelectedItem = FeedList.HitTest(X, Y)

--
Dee Earley (dee.earley@icode.co.uk)
i-Catcher Development Team

iCode Systems

13-Nov-09 10:14 AM

I do not understand your answer. I am interested in how the end-user,
not the programmer, can deselect all items in a Tree-View control.

13-Nov-09 11:13 AM

If you add the style TVS_CHECKBOXES, the treeveiw displays checkboxes
so the user can select multiple items. Functional, but not pretty.


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13-Nov-09 12:12 PM

There does not appear to be a standard way, but adding that one line of
code (in an appropriate language) allows them to.

I guess this also answers the documentation question as:

--
Dee Earley (dee.earley@icode.co.uk)
i-Catcher Development Team

iCode Systems

13-Nov-09 01:50 PM

I have not found HitTest as a Windows API function.

without selecting another tree-view item ? If so, how does the end-user
do that even given that you can tell me where HitTest can be found ?

13-Nov-09 02:38 PM

Does Ctrl+click deselect it?

15-Nov-09 02:23 AM

No, it does not.

16-Nov-09 06:17 AM

The native message is TVM_HITTEST.
I have no idea what language/environment you are using so I cannot say
more than that.


By just clicking on something in the tree that is not an item.
Practically any white space counts as this.
The code (when translated) will select whichever item is under the mouse
pointer on mousedown. If there is no item, nothing is selected.

Fairly intuitive IMO.

--
Dee Earley (dee.earley@icode.co.uk)
i-Catcher Development Team

iCode Systems