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| package mouseevents;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Point2D;
import javafx.scene.Cursor;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.scene.effect.InnerShadow;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.ScrollEvent;
import javafx.scene.paint.Color;
import javafx.scene.paint.CycleMethod;
import javafx.scene.paint.LinearGradient;
import javafx.scene.paint.RadialGradient;
import javafx.scene.paint.Stop;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.RectangleBuilder;
import javafx.stage.Stage;
/**
* A sample that demonstrates various mouse and scroll events and their usage.
* Click the circles and drag them across the screen. Scroll the whole screen.
* All events are logged to the console.
*
* @see javafx.scene.Cursor
* @see javafx.scene.input.MouseEvent
* @see javafx.event.EventHandler
*/
public class MouseEvents extends Application {
{
}
//variables for storing initial position before drag of circle
private double initX;
private double initY;
private Point2D dragAnchor;
private void init(Stage primaryStage) {
Group root = new Group();
primaryStage.setResizable(false);
primaryStage.setScene(new Scene(root, 500,500));
// create circle with method listed below: paramethers: name of the circle, color of the circle, radius
final Circle circleSmall = createCircle("Blue circle", Color.DODGERBLUE, 25);
circleSmall.setTranslateX(200);
circleSmall.setTranslateY(80);
// and a second, bigger circle
// final Circle circleSmall = createCircle("Orange circle", Color.CORAL, 40);
// we can set mouse event to any node, also on the rectangle
circleSmall.setOnMouseMoved(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
}
}
);
// show all the circle , rectangle and console
root.getChildren().addAll(circleSmall);
}
private Circle createCircle(final String name, final Color color, int radius) {
//create a circle with desired name, color and radius
final Circle circle = new Circle(radius, new RadialGradient(0, 0, 0.2, 0.3, 1, true, CycleMethod.NO_CYCLE, new Stop[] {
new Stop(0, Color.rgb(250,250,255)),
new Stop(1, color)
}));
//add a shadow effect
circle.setEffect(new InnerShadow(7, color.darker().darker()));
//change a cursor when it is over circle
circle.setCursor(Cursor.HAND);
//add a mouse listeners
circle.setOnMouseClicked(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
//the event will be passed only to the circle which is on front
me.consume();
}
});
circle.setOnMouseDragged(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
double dragX = me.getSceneX() - dragAnchor.getX();
double dragY = me.getSceneY() - dragAnchor.getY();
//calculate new position of the circle
double newXPosition = initX + dragX;
double newYPosition = initY + dragY;
//if new position do not exceeds borders of the rectangle, translate to this position
if ((newXPosition>=circle.getRadius()) && (newXPosition<=500-circle.getRadius())) {
circle.setTranslateX(newXPosition);
}
if ((newYPosition>=circle.getRadius()) && (newYPosition<=300-circle.getRadius())){
circle.setTranslateY(newYPosition);
}
}
});
circle.setOnMouseEntered(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
//change the z-coordinate of the circle
circle.toFront();
}
});
circle.setOnMouseExited(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
}
});
circle.setOnMousePressed(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
//when mouse is pressed, store initial position
initX = circle.getTranslateX();
initY = circle.getTranslateY();
dragAnchor = new Point2D(me.getSceneX(), me.getSceneY());
}
});
circle.setOnMouseReleased(new EventHandler<MouseEvent>() {
public void handle(MouseEvent me) {
}
});
return circle;
}
/*private void showOnConsole(String text) {
//if there is 8 items in list, delete first log message, shift other logs and add a new one to end position
if (consoleObservableList.size()==8) {
consoleObservableList.remove(0);
}
consoleObservableList.add(text);
}*/
@Override public void start(Stage primaryStage) throws Exception {
init(primaryStage);
primaryStage.show();
}
/**
* The main() method is ignored in correctly deployed JavaFX
* application. main() serves only as fallback in case the
* application can not be launched through deployment artifacts,
* e.g., in IDEs with limited FX support. NetBeans ignores main().
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
} |
