JavaFX Accelerator execute twice - javafx

Question

I'm using Accelerator in my application, and when I hit the F1 key it should open a dialog just once, but when I close the dialog it appears again. The runnable is been called twice.
Does anyone know what it could be? Is it a bug? I'm using a Macbook to develop.
This is my controller:
public class Screen1Controller {
#FXML
private TextField txtCode;
#FXML
private TableView tblProducts;
#FXML
private Button buttonAskUserDecision;
#FXML
public void initialize () {
Platform.runLater(new Runnable() {
#Override
public void run() {
initializeKeyCombinations();
}
});
}
#FXML
private void executePrint (ActionEvent event) {
System.out.println("ExecutePrint");
}
public void initializeKeyCombinations() {
buttonAskUserDecision.getScene().getAccelerators().clear();
buttonAskUserDecision.getScene().getAccelerators().put(
new KeyCodeCombination(KeyCode.F1),
new Runnable() {
#Override
public void run() {
System.out.println("Executed F1");
}
}
);
}
}
This is my FXML:
<StackPane prefHeight="600.0" prefWidth="800.0" stylesheets="#../../../css/main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Screen1Controller">
<children>
<BorderPane prefHeight="200.0" prefWidth="200.0">
<center>
<ScrollPane fitToHeight="true" fitToWidth="true" BorderPane.alignment="CENTER">
<content>
<VBox alignment="TOP_CENTER">
<children>
<GridPane hgap="10.0">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" percentWidth="20.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" percentWidth="20.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" percentWidth="30.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" percentWidth="30.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints fillHeight="false" minHeight="30.0" vgrow="NEVER" />
</rowConstraints>
<children>
<TextField fx:id="txtCode" GridPane.columnSpan="2" />
</children>
<VBox.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</VBox.margin>
</GridPane>
<TableView fx:id="tblProducts" prefHeight="200.0" prefWidth="200.0">
<columns>
<TableColumn prefWidth="75.0" text="C1" />
<TableColumn prefWidth="75.0" text="C2" />
</columns>
</TableView>
</children>
</VBox>
</content>
</ScrollPane>
</center>
<bottom>
<ToolBar maxHeight="80.0" minHeight="80.0" prefHeight="80.0" styleClass="default-skin-pdv-toolbar" stylesheets="#../../../css/main.css">
<items>
<Button fx:id="buttonAskUserDecision" layoutX="10.0" layoutY="20.0" mnemonicParsing="false" onAction="#executePrint" prefHeight="60.0" prefWidth="69.0" styleClass="default-skin-pdv-button">
</Button>
</items>
<padding>
<Insets left="10.0" />
</padding>
</ToolBar>
</bottom>
</BorderPane>
</children>
Inside this screen I have a textfield, a tableview and a toolbar with a button.
I did some new tests. Every time I give focus on my tableview and hit the F1 button, the execution is incremented by 1. For instance, if I click on the tableview and hit F1, it prints "Executed F1" just once on the console and the focus go back to the textfield, if i give focus to the tableview again and hit F1, It prints two times the text on the console and give focus back to the textfield, and if I give focus to the tableview for the third time and press the F1 again it prints three more lines on the console, and so on.
It only happens when I use the F1 button.. When I click the button with the mouse it prints only once.
I removed the TableView from the screen and it stopped duplicating the executions.
The problem is: I need this tableView in my screen. What could be happening here?
That's my Java version details:
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

Answer 1

The problem was in a component (Dialog) from ControlsFX library.
I created a new Project and included a textfield, viewTable and a button. The duplication didn't happened.
When I included the ControlsFX Dialog, the started to happen. When I click the button, with the mouse, the dialog opens just once. But when I use the accelerator to fire the button, the dialog opens twice.
Edited:
I created my own dialog, but it happened again. Instead of using the stage.showAndWait() I tried the stage.show() and it stopped to open twice.
I searched the stackoverflow and found this answer https://stackoverflow.com/a/22463857/916804 ... When I tried to wrap the call to the Dialog with the Platform.runLater the execution happened only once.