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POHow do I keep a ClickHandler from being called twice on a button in GWT?
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  1. POHow do I keep a ClickHandler from being called twice on a button in GWT?
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    copied!<p>Here's the setup: I have a page, we'll call it A, which contains a button, we'll call it B. When a user clicks on B, a dialog opens (C). C knows nothing about A or B once it has been created. </p> <p>Right now, if a user double-clicks on B, 2 or more Cs are created, which is not desirable. Since C knows nothing about B, I cannot disable the button because if a user presses Cancel in C, they will go back to A but B will still be disabled. I also can't save the page ID and limit C from being created that way because if a user does open C, clicks Cancel but then decides to open C again, they have to be able to do that.</p> <p>How can I stop the button from allowing more than one dialog to open, no matter how many clicks are done in succession?</p> <p><strong>EDIT</strong><br> I simplified too much in the above description, so here's a more in depth look. My <code>Toolbar</code> class has a button called <code>reference</code>. When <code>reference</code> is clicked, a function is called on an entirely separate class, <code>ItemPicker</code>, which creates and displays the <code>CreateConversation</code> dialog. So, relating back to my original scenario, B doesn't know anything about C. I realize this is convoluted, but it's not something I can change at the moment.</p> <p>Somehow, I need to stop <code>reference</code> from making a second call to <code>ItemPicker.createAndShow()</code> if it's clicked more than once and a <code>CreateConversation</code> dialog is already being opened. Also, there isn't a specific instance of <code>ItemPicker</code> in the <code>Toolbar</code> class; <code>createAndShow()</code> is a static method.</p>
 

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