on 1/03/2005 9:23 Am, Eric Schlegel at email@hidden wrote:
> On Mar 1, 2005, at 9:34 PM, Mike Kluev wrote:
>
>> When I programmatically resize tabs control that was created in
>> interface builder e.g. to make it smaller, I observe drawing artifacts
>> on switching tabs (extra area outside tabs control is erased, tabs
>> themselves are getting erased and not updated properly) . Looks like
>> those userPanes created by IB runtime, corresponding to each tab pane
>> (aka "Tab Items" in IB user interface) are not resized appropriately.
>> Whose responsibility is it to resize those user panes (e.g. by means
>> of kEventControlBoundsChanged event installed on the tabs control
>> target), mine or IB runtime? If the latter I'll file a bug.
>
> Yours.
Thanks. I was frightened to mess with those internal user panes
whose existence in itself is uncertain, because it is implementation
detail of IB runtime.
> BTW, even if I *do not* resize tabs control, it still has some minor
> drawing artifacts on switching tabs, presumably due to the same issue:
> those userpanes sizes match the size of tab control itself, so when
> the user pane is erased it wipes that nice rounded tab frame (left
> right and bottom sides of tabs control frame are affected).
So even if I do not resize tabs control it is not considered a bug
that tabs control is not drawn correctly right out of the box?
OK, what should be correct rectangle for that IB runtime's user
item? If I do this, what should be correct inset values?
GetControlBounds(tab, &r);
r.top += topInset;
r.bottom -= bottomInset;
r.left += leftInset;
r.right -= rightInset;
SetControlBounds(all those user panes of tab, &r);
Experiments show that left/right/bottom insets should be 2, though
I am not sure if it is ok to hardcode this and if that could be
changed in future OS version. Should I calculate insets based on
some GetThemeMetric?
Do you guys use something else to solve this drawing issue?
Mike
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