Creating a LookupContext can be sloooow for large projects. We create
one instance for every update in the Outline to get the right icons.
Take a shortcut here and just use the element name directly, ignoring
packages names etc.
This is a hot fix for 2.1, a following patch will change the Icon
retrieval API accordingly.
Reviewed-by: Roberto Raggi
Task-number: QTCREATORBUG-2859
The Outline is only updated (with a delay) if the current text is syntactically valid.
Prevent the outline from changing the text underneath via drag&drop if
the outline model is 'behind'.
Reviewed-by: Christian Kamm
Cut down update times of Outline by a magnitude by only emitting
itemChanged signal if absolutely needed. This doesn't include the change
of the icon, because QIcon is missing a comparison operator ...
Previously we're setting the properties of the items one by one, each
time potentially triggering an update of the view. Actually this
uncovered an error in the Filter, which was only reacting to the first
change and therefore didn't take the item type into account on first
load.
Instead, we now use our own QStandardItem class which can be used to
assign all values at once.
