Wednesday, April 4, 2012

Free draw by MouseEvent

Last article demonstrate how to "Detect mouse event" in JavaFX 2. It's modify to free draw path in the EventHandler for MouseEvent.


package javafx_mouseevent;

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.stage.Stage;

/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX_MouseEvent extends Application {
    
    Label label;
    
    Path path;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("java-buddy.blogspot.com");
        Group root = new Group();
        Scene scene = new Scene(root, 300, 250);
        
        label = new Label("Wait mouse");
        
        path = new Path();
        path.setStrokeWidth(1);
        path.setStroke(Color.BLACK);
        
        
        scene.setOnMouseClicked(mouseHandler);
        scene.setOnMouseDragged(mouseHandler);
        scene.setOnMouseEntered(mouseHandler);
        scene.setOnMouseExited(mouseHandler);
        scene.setOnMouseMoved(mouseHandler);
        scene.setOnMousePressed(mouseHandler);
        scene.setOnMouseReleased(mouseHandler);

        root.getChildren().add(label);
        root.getChildren().add(path);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    
    EventHandler<MouseEvent> mouseHandler = new EventHandler<MouseEvent>() {

        @Override
        public void handle(MouseEvent mouseEvent) {
            label.setText(mouseEvent.getEventType() + "\n"
                    + "X : Y - " + mouseEvent.getX() + " : " + mouseEvent.getY() + "\n"
                    + "SceneX : SceneY - " + mouseEvent.getSceneX() + " : " + mouseEvent.getSceneY() + "\n"
                    + "ScreenX : ScreenY - " + mouseEvent.getScreenX() + " : " + mouseEvent.getScreenY());
            
            if(mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED){
                path.getElements().clear();
                path.getElements().add(new MoveTo(mouseEvent.getX(), mouseEvent.getY()));
            }else if(mouseEvent.getEventType() == MouseEvent.MOUSE_DRAGGED){
                path.getElements().add(new LineTo(mouseEvent.getX(), mouseEvent.getY()));
            }
            
        }
    
    };
    
}


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