Detecting SelectedObjectChanged When Clicking Another Control?

[dunbarx at aol.com]

Scott.


Right. We need an "objectDeselected" message. I saw nothing in the message watcher that seemed ripe for exploitation. "mouseUp" and "mouseDown" were the only ones that seemed so, along with a few obscure others, and they would have to be handled way up as well.


But is it so onerous to have the high-level handler? Simple, can be buried somewhere, and works, as you say.


Craig



-----Original Message-----
From: Scott Rossi <scott at tactilemedia.com>
To: LiveCode Mail List <use-livecode at lists.runrev.com>
Sent: Fri, Sep 27, 2013 7:57 pm
Subject: Re: Detecting SelectedObjectChanged When Clicking Another Control?


Hi Craig:

If I understand what you're proposing, you would need to place the script
that handles the selection detection at the card or stack level, or in a
front or backScript.  This is what I'm doing already (backScript), and it
works fine.  But I'm looking for an object-level method that doesn't need
to track *all* selections.  I should have explained this better.

>From what I've found, the clicked object itself can detect when it is
selected, but I'm hoping there's an object-level option that tells it when
it's *deselected*.

Regards,

Scott Rossi
Creative Director
Tactile Media, UX/UI Design




On 9/27/13 4:43 PM, "dunbarx at aol.com" <dunbarx at aol.com> wrote:

>Scott.
>
>
>Oh, I see, you want to know when you deselect, and there is no
>"deSelectedObjectChanged" message.
>
>
>Can't you set a custom property when the object of interest is selected,
>and check the target when the "selectedObjectChanged" message fires, and
>if that new target is not that original object, let you know?
>
>
>Craig
>
>
>
>-----Original Message-----
>From: Scott Rossi <scott at tactilemedia.com>
>To: LiveCode Mail List <use-livecode at lists.runrev.com>
>Sent: Fri, Sep 27, 2013 7:16 pm
>Subject: Detecting SelectedObjectChanged When Clicking Another Control?
>
>
>Hi All:
>
>I recently ran into a situation where I need to trap selectedObjectChanged
>after clicking on something other than the selected control (as opposed to
>clicking on the card where nothing is selected).  Can you detect this
>without resorting to a front/backScript or a card/stack-level script?
>
>I have a control that changes its state when it is selected, and I need to
>revert that state when the object is deselected.  Starting with the
>selected control, if I click on the card (click nothing), the control gets
>the selectedObjectChanged message and can be reset.  But if I click on
>another object, there doesn't seem to be a built-in way for the control to
>detect this.
>
>I've resorted to loading a backScript to tell the original control that it
>has been deselected, but this seems fragile and I'm wondering if there's a
>better way to handle this.
>
>Thanks for suggestions.
>
>Regards,
>
>Scott Rossi
>Creative Director
>Tactile Media, UX/UI Design
>
>
>
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