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copied!<p>Here is <a href="https://gist.github.com/1887631" rel="noreferrer">link to a solution</a> I created earlier for modal dialogs in JavaFX 2.1 The solution creates a modal stage on top of the current stage and takes action on the dialog results via event handlers for the dialog controls.</p> <p><em>Update</em></p> <p>The prior linked solution uses a dated event handler approach to take action after a dialog was dismissed. That approach was valid for pre-JavaFX 2.2 implementations. For JavaFX 8+ there is no need for event handers, instead, use the new Stage <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/stage/Stage.html#showAndWait--" rel="noreferrer"><code>showAndWait()</code></a> method. For example:</p> <pre><code>Stage dialog = new Stage(); // populate dialog with controls. ... dialog.initOwner(parentStage); dialog.initModality(Modality.APPLICATION_MODAL); dialog.showAndWait(); // process result of dialog operation. ... </code></pre> <p>Note that, in order for things to work as expected, it is important to initialize the owner of the Stage <em>and</em> to initialize the modality of the Stage to either <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/stage/Modality.html#WINDOW_MODAL" rel="noreferrer">WINDOW_MODAL</a> or <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/stage/Modality.html#APPLICATION_MODAL" rel="noreferrer">APPLICATION_MODAL</a>.</p> <p>There are some high quality standard UI dialogs in <a href="http://code.makery.ch/blog/javafx-dialogs-official/" rel="noreferrer">JavaFX 8</a> and <a href="http://fxexperience.com/controlsfx/" rel="noreferrer">ControlsFX</a>, if they fit your requirements, I advise using those rather than developing your own. Those in-built JavaFX <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Dialog.html" rel="noreferrer">Dialog</a> and <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Alert.html" rel="noreferrer">Alert</a> classes also have <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Dialog.html#initOwner-javafx.stage.Window-" rel="noreferrer"><code>initOwner</code></a> and <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Dialog.html#initModality-javafx.stage.Modality-" rel="noreferrer"><code>initModality</code></a> and <a href="https://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/Dialog.html#showAndWait--" rel="noreferrer"><code>showAndWait</code></a> methods, so that you can set the modality for them as you wish (note that, by default, the in-built dialogs are application modal).</p>

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