I create a new Stage in the Code and it's needed, that the Stage is undecorated! In this case the new created Stage loses the Drag-Function.
I created the following code, now i can drag the Stage. But the Stage is flickery, so it stays not at one place, it flickers in a radius of some pixels. How can I solve this problem? Thanks for your help.
EXAMPLE - CODE:
import javafx.application.Application;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Point2D;
import javafx.scene.Cursor;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.MenuBar;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class DragStuff extends Application {
VBox mainContainer;
Stage mainSt;
@Override
public void start(Stage mainStage) throws Exception {
// TODO Auto-generated method stub
mainStage.initStyle(StageStyle.UNDECORATED);
mainSt = mainStage;
mainContainer = new VBox();
mainContainer.setStyle("-fx-background-color:red");
Label headlineInformation = new Label("Testing");
headlineInformation.getStyleClass().addAll("popup-label-name");
headlineInformation.setMaxWidth(Double.MAX_VALUE);
Button closeButton = new Button("X");
closeButton.setVisible(true);
closeButton.getStyleClass()
.addAll("popup-button", "popup-button-color");
HBox headContainer = new HBox();
HBox.setHgrow(headlineInformation, Priority.ALWAYS);
headContainer.setPadding(new Insets(5, 5, 5, 5));
headContainer.getChildren().addAll(headlineInformation, closeButton);
Pane pane = new Pane();
pane.getChildren()
.addAll(new Label(
"Text Stuff"));
mainContainer.getChildren().addAll(headContainer, pane);
Scene sc = new Scene(mainContainer);
mainStage.setScene(sc);
mainStage.show();
dragHandling();
}
public void dragHandling() {
final ObjectProperty<Point2D> mouseKoordinates = new SimpleObjectProperty<>();
mainContainer.setOnMousePressed(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
mouseKoordinates.set(new Point2D(event.getSceneX(), event
.getSceneY()));
mainContainer.getScene().setCursor(Cursor.HAND);
};
});
mainContainer.setOnMouseReleased(new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent arg0) {
mouseKoordinates.set(null);
mainContainer.getScene().setCursor(Cursor.DEFAULT);
}
});
mainContainer.setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
if (mouseKoordinates.get() != null) {
double x = event.getX();
double deltaX = x - mouseKoordinates.get().getX();
double y = event.getY();
double deltaY = y - mouseKoordinates.get().getY();
mainSt.setX(mainSt.getX() + deltaX);
mainSt.setY(mainSt.getY() + deltaY);
// mouseKoordinates.set(new Point2D(x, y));
}
}
});
}
public static void main(String[] args) {
launch(args);
}
}
So i fixed it, it doesn't work becouse we had the wrong references! The following code works perfect! It's needes to set the Mouse-Coordinates by pressing the mouse to the ScreenX/Y Value and not to the X/Y Value! Also it's important to set the new point!
import javafx.application.Application;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Point2D;
import javafx.scene.Cursor;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.MenuBar;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class DragStuff extends Application {
VBox mainContainer;
Stage mainSt;
@Override
public void start(Stage mainStage) throws Exception {
// TODO Auto-generated method stub
mainStage.initStyle(StageStyle.UNDECORATED);
mainSt = mainStage;
mainContainer = new VBox();
mainContainer.setStyle("-fx-background-color:red");
Label headlineInformation = new Label("Testing");
headlineInformation.getStyleClass().addAll("popup-label-name");
headlineInformation.setMaxWidth(Double.MAX_VALUE);
Button closeButton = new Button("X");
closeButton.setVisible(true);
closeButton.getStyleClass()
.addAll("popup-button", "popup-button-color");
HBox headContainer = new HBox();
HBox.setHgrow(headlineInformation, Priority.ALWAYS);
headContainer.setPadding(new Insets(5, 5, 5, 5));
headContainer.getChildren().addAll(headlineInformation, closeButton);
Pane pane = new Pane();
pane.getChildren()
.addAll(new Label(
"Text Stuff"));
mainContainer.getChildren().addAll(headContainer, pane);
Scene sc = new Scene(mainContainer);
mainStage.setScene(sc);
mainStage.show();
dragHandling();
}
public void dragHandling() {
final ObjectProperty<Point2D> mouseKoordinates = new SimpleObjectProperty<>();
mainContainer.setOnMousePressed(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
//Important to create the new Point with a Reference to the Screen!
mouseKoordinates.set(new Point2D(event.getScreenX(), event
.getScreenY()));
mainContainer.getScene().setCursor(Cursor.HAND);
};
});
mainContainer.setOnMouseReleased(new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent arg0) {
mouseKoordinates.set(null);
mainContainer.getScene().setCursor(Cursor.DEFAULT);
}
});
mainContainer.setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
if (mouseKoordinates.get() != null) {
//getScreenX and not getX
double x = event.getScreenX();
double deltaX = x - mouseKoordinates.get().getX();
//getScreenY and not getY
double y = event.getScreenY();
double deltaY = y - mouseKoordinates.get().getY();
mainSt.setX(mainSt.getX() + deltaX);
mainSt.setY(mainSt.getY() + deltaY);
//VERY IMPORANT
mouseKoordinates.set(new Point2D(x, y));
}
}
});
}
public static void main(String[] args) {
launch(args);
}
}