import java.util.concurrent.atomic.AtomicInteger;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.stage.Stage;
class DrawingPane extends Pane
{
public DrawingPane( Image image, Polygon poly )
{
poly.setFill( Color.web( "ANTIQUEWHITE", 0.8 ) );
poly.setStroke( Color.web( "ANTIQUEWHITE" ) );
poly.setStrokeWidth( 2 );
getChildren().addAll( new ImageView( image ), poly );
for ( int i = 0; i < poly.getPoints().size(); i += 2 ) {
Circle circle = new Circle( poly.getPoints().get( i ), poly.getPoints().get( i + 1 ), 5 );
circle.setFill( Color.web( "PERU", 0.8 ) );
circle.setStroke( Color.PERU );
circle.setStrokeWidth( 2 );
AtomicInteger polyCoordinateIndex = new AtomicInteger( i );
circle.centerXProperty().addListener( new ChangeListener<Number>() {
@Override
public void changed( ObservableValue<? extends Number> observable, Number oldValue, Number newValue ) {
poly.getPoints().set( polyCoordinateIndex.get(), newValue.doubleValue() );
}
} );
circle.centerYProperty().addListener( new ChangeListener<Number>() {
@Override
public void changed( ObservableValue<? extends Number> observable, Number oldValue, Number newValue ) {
poly.getPoints().set( polyCoordinateIndex.get() + 1, (Double) newValue );
}
} );
setDragHandler( circle );
getChildren().add( circle );
}
}
private double dragDeltaX, dragDeltaY;
private void setDragHandler( Circle circle )
{
circle.setOnMousePressed( new EventHandler<MouseEvent>() {
@Override public void handle( MouseEvent mouseEvent ) {
dragDeltaX = circle.getCenterX() - mouseEvent.getSceneX();
dragDeltaY = circle.getCenterY() - mouseEvent.getSceneY();
}
} );
circle.setOnMouseDragged( new EventHandler<MouseEvent>() {
@Override public void handle( MouseEvent mouseEvent ) {
circle.setCenterX( mouseEvent.getSceneX() + dragDeltaX );
circle.setCenterY( mouseEvent.getSceneY() + dragDeltaY );
circle.setCursor( Cursor.MOVE );
}
} );
circle.setOnMouseEntered( new EventHandler<MouseEvent>() {
@Override public void handle( MouseEvent mouseEvent ) {
circle.setCursor( Cursor.HAND );
}
} );
circle.setOnMouseReleased( new EventHandler<MouseEvent>() {
@Override public void handle( MouseEvent mouseEvent ) {
circle.setCursor( Cursor.HAND );
}
} );
}
}
public class JavafxDemo extends Application
{
@Override
public void start( Stage stage )
{
Image image = new Image( "http://tours-tv.com/uploads/maps/map-Medizinische-Hochschule-Hannover-karta.jpg" );
Polygon poly = new Polygon( 10, 10, 100, 10, 200, 100, 50, 200 );
stage.setScene( new Scene( new DrawingPane( image, poly ), 450, 300 ) );
stage.show();
}
public static void main( String[] args )
{
launch( args );
}
}
Ähnliche Beiträge
