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From Bill van Melle <bill.van.me...@gmail.com>
Subject Re: Component#isEnabled does not affect appearance recursively
Date Fri, 07 Oct 2011 05:38:46 GMT
But I don't get why a component would ever want to paint itself to look like
the user could interact with it if, in fact, they can't.  Wouldn't that be a
violation of UI design principles?

Are there other toolkits that do it the Pivot way?


On Thu, Oct 6, 2011 at 8:02 PM, Greg Brown <gk_brown@verizon.net> wrote:

> This is actually by design. The skins could paint their state based on
> isBlocked(), but that didn't seem like the right thing to do (at least, not
> all the time). But maybe it is something that could be configured by a
> style.
>
>
> ----- Reply message -----
> From: "Bill van Melle" <bill.van.melle@gmail.com>
> Date: Thu, Oct 6, 2011 6:57 pm
> Subject: Component#isEnabled does not affect appearance recursively
> To: <user@pivot.apache.org>
>
> For a long time, I've been thinking that Pivot does a particularly poor job
> of making disabled controls visually different, but I finally realized
> what's going on.
> If you have a simple component with enabled=false, it is rendered in a
> visually distinct "grayed-out" way, like other toolkits do.  However, if you
> have a container with  enabled=false, its children render normally.  If you
> want a whole container to be disabled, and you want it to look like it's
> disabled, you have to disable the children one by one (and keep track of
> which ones should remain disabled for when you want to re-enable the
> container)!  That's not true in other toolkits I've used. Am I missing
> something?
>
> I see there is a method Component#isBlocked, which provides the needed
> functionality, but it looks like it's only being used by the event
> propagation code.  Seems to me there is a whole lot of paint code in the
> system for which something.isEnabled() ought to be replaced by
> !something.isBlocked().  Yes?
>

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