Re: [platform-swt-dev] Need workaround for Windows Tree

[Boris_Shingarov@xxxxxxx]

Unfortunately, this is the area where you just can not make a lot of assumptions... other than "random things can happen".  Every platform has its own weirdness with Tree selection; my favorite is the GTK single-select CTree, there is always exactly one selection, so the first item is always automatically selected.   Sad but true: Tree selection semantics varies from platform to platform.

Steve_Northover@xxxxxxx Sent by: platform-swt-dev-admin@xxxxxxxxxxx 04/30/2002 10:50 AM Please respond to platform-swt-dev

To:        platform-swt-dev@xxxxxxxxxxx         cc:                 Subject:        Re: [platform-swt-dev] Need workaround for Windows Tree

Sorry, this is what the Windows tree does.  I tried stopping it once way
back when
and didn't succeed.  Even if we stopped the "free selection on delete",
when the
tree gets focus, if no item is selected, you get a free one.



                                                                                                                                           
                      "Randy Hudson"                                                                                                       
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                      04/29/02 10:25 PM                                                                                                    
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If I have a Windows Tree with absolutely nothing selected, disposing a
TreeItem causes that Item's parent or one of its siblings to get selected.
Can this be prevented?

For GEF, this problem was recently worsened by the fact that when the
selection changes in the Outline, we are now *scrolling* to the same object
in the graphical view.  This is a great feature when the user causes the
selection, but not as a bogus side-effect.

The graphical proximity of objects don't match their outline proximity, so
the graph view is jumping around randomly when you do a delete.

You can reproduce this in the JDT by selecting a member in the outline view
and doing a delete.  The enclosing TreeItem (The declaring class) gets
selected, and the editor is scrolled to the beginning of the Type
declaration, jumping from wherever it was.

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