How to set popup scene mouse transparent in javafx - javafx

Question

How to do that in JavaFX?
The popup shows up when the mouse enters a node. When the mouse enters the showing popup, the popup obscures the mouse from the node. Then the node fire exit event. How to make the popup ignore the mouse events?
code
package sample;
import javafx.application.Application;
import javafx.geometry.Point3D;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Popup;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage) {
StackPane root = new StackPane();
primaryStage.setScene(new Scene(root, 300, 275));
Label labelNode = new Label("Label Node");
labelNode.setPrefHeight(200);
labelNode.styleProperty().set("-fx-background-color: orange");
Popup popup = new Popup();
popup.getScene().getRoot().setMouseTransparent(true);
AnchorPane popContent =new AnchorPane();
popContent.styleProperty().set("-fx-background-color: red");
popContent.setPrefHeight(100);
popContent.getChildren().add(new Label("Popup content"));
popup.getContent().add(popContent);
labelNode.setOnMouseEntered(event->{
Point3D point3D = labelNode.localToScene(event.getX(), event.getY(), 0);
popup.show(primaryStage, point3D.getX()-5, point3D.getY()-5);
});
labelNode.setOnMouseExited(event->{
popup.hide();
});
root.getChildren().add(labelNode);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Please try moving the cursor in to "yellow" several times.

Answer 1

Solution:
Keep two boolean nodeExited and popupExited statuses. Hide popup when both are true.
package sample;
import javafx.application.Application;
import javafx.geometry.Point3D;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Popup;
import javafx.stage.Stage;
public class Main extends Application {
boolean nodeExited = false;
boolean popupExited = false;
#Override
public void start(Stage primaryStage) {
StackPane root = new StackPane();
primaryStage.setScene(new Scene(root, 300, 275));
Label labelNode = new Label("Label Node");
labelNode.setPrefHeight(200);
labelNode.styleProperty().set("-fx-background-color: orange");
Popup popup = new Popup();
popup.getScene().getRoot().setMouseTransparent(true);
AnchorPane popContent = new AnchorPane();
popContent.styleProperty().set("-fx-background-color: red");
popContent.setPrefHeight(100);
popContent.getChildren().add(new Label("Popup content"));
popup.getContent().add(popContent);
popup.getScene().setOnMouseEntered(event -> {
popupExited = false;
});
popup.getScene().setOnMouseExited(event -> {
popupExited = true;
if (nodeExited)
popup.hide();
});
labelNode.setOnMouseEntered(event -> {
nodeExited = false;
Point3D point3D = labelNode.localToScene(event.getX(), event.getY(), 0);
popup.show(primaryStage, point3D.getX() - 5, point3D.getY() - 5);
});
labelNode.setOnMouseExited(event -> {
nodeExited = true;
if (popupExited)
popup.hide();
});
root.getChildren().add(labelNode);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}