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POUndo behavior on textField value based on value verification after focus lost
 

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  1. POUndo behavior on textField value based on value verification after focus lost
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    <p>I post new question based on this previously code posted here (<a href="https://stackoverflow.com/questions/14693177/filter-users-values-on-textfield-input-after-a-binddirectional-strategy-betwen-a">Filter users values on TextField input after a BindDirectional strategy betwen a Slider and min/max TextField</a>) </p> <p>My goal is simple, what is the best way to undo wrong <code>TextField</code> value (based on custom verification) after user lost the focus event on my value. </p> <p>Only way is to access the oldValue before user overwrite with another focus event ?</p> <p>Actually i have this simple code : </p> <pre><code>val myTextField = new TextField () def parseDouble(s: String) = try { Some(s.toDouble) } catch { case _ ⇒ None } myTextField.focusedProperty().addListener( new ChangeListener[java.lang.Boolean]() { override def changed(observable: ObservableValue[_ &lt;: java.lang.Boolean], oldValue: java.lang.Boolean, newValue: java.lang.Boolean) { if (!newValue) { parseDouble(myTextField.textProperty().get()) match { case Some(d: Double) ⇒ // test on the double value entered by user case _ ⇒ // code to reset to old value ?? } } } }) </code></pre> <p><strong>Update 1 :</strong> </p> <p>I find discussion here : <a href="https://forums.oracle.com/forums/thread.jspa?threadID=2382472" rel="nofollow noreferrer">https://forums.oracle.com/forums/thread.jspa?threadID=2382472</a> about <strong>undo functionnality for TextField/TextArea</strong> and other source code about <code>TextInputControlBehavior</code> : <a href="https://forums.oracle.com/forums/thread.jspa?threadID=2438759&amp;tstart=45" rel="nofollow noreferrer">https://forums.oracle.com/forums/thread.jspa?threadID=2438759&amp;tstart=45</a></p> <p>I find description of undo behavior implemented into javafx 2.2 here <a href="http://javafx-jira.kenai.com/browse/RT-7547" rel="nofollow noreferrer">http://javafx-jira.kenai.com/browse/RT-7547</a> but i cannot find sample code...</p> <p><strong>Update 2 :</strong> </p> <p>I find a post for public undo control API (roadmap fixed for 2.2.6) for <code>TextInputControl</code> here : <a href="http://javafx-jira.kenai.com/browse/RT-26575" rel="nofollow noreferrer">http://javafx-jira.kenai.com/browse/RT-26575</a></p> <p><code>TextInputBehaviorControl</code> can be see here : <a href="https://bitbucket.org/shemnon/openjfx-rt/src/6696e9cea59c401d2637d82f9cf96a515d210203/javafx-ui-controls/src/com/sun/javafx/scene/control/behavior/TextInputControlBehavior.java" rel="nofollow noreferrer">https://bitbucket.org/shemnon/openjfx-rt/src/6696e9cea59c401d2637d82f9cf96a515d210203/javafx-ui-controls/src/com/sun/javafx/scene/control/behavior/TextInputControlBehavior.java</a></p> <p><strong>Update 3 :</strong> </p> <p><strong><em>Tadam !</em></strong></p> <p>Finally i found an horrible way to do that, i hope public API is for 2.2.6 version of javaFX ...</p> <pre><code> val myTextField = new TextField () def parseDouble(s: String) = try { Some(s.toDouble) } catch { case _ ⇒ None } myTextField.focusedProperty().addListener( new ChangeListener[java.lang.Boolean]() { db ⇒ override def changed(observable: ObservableValue[_ &lt;: java.lang.Boolean], oldValue: java.lang.Boolean, newValue: java.lang.Boolean) { if (!newValue) { parseDouble(myTextField.textProperty().get()) match { case Some(d: Double) ⇒ if (myTextField.minValue &gt; d || d &gt; myTextField.maxValue) { doubleField.getSkin.asInstanceOf[TextInputControlSkin[_, _]].getBehavior.asInstanceOf[TextInputControlBehavior[_]].callAction("Undo") } else { // Here you change value property of textField } case _ ⇒ myTextField.getSkin.asInstanceOf[TextInputControlSkin[_, _]].getBehavior.asInstanceOf[TextInputControlBehavior[_]].callAction("Undo") } } } }) </code></pre> <p>I validate the answer if anybody find a better way to do that :)</p>
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    1. USreyman64
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    1. COSounds like you already have the answer.
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    2. CO@Andy-till I'm not expert in javafx, or ui with event building :/ I search proper way to do this behavior, but if it's the only way to do that, i consider posting the source code here to help community. I edit with some path for discussion..
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      1. USreyman64
 

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