JavaFX实现一个画板

package drawingBoard; import javafx.beans.property.*; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.event.EventType; import javafx.geometry.Orientation; import javafx.scene.Cursor; import javafx.scene.Group; import javafx.scene.control.*; import javafx.scene.effect.Bloom; import javafx.scene.effect.InnerShadow; import javafx.scene.effect.Light; import javafx.scene.effect.Lighting; import javafx.scene.input.KeyCode; import javafx.scene.input.KeyEvent; import javafx.scene.input.MouseEvent; import javafx.scene.layout.Pane; import javafx.scene.paint.Color; import javafx.scene.shape.*; import javafx.scene.text.Font; import java.util.*; public class PropertyBar extends Pane { MainPane fa; private Label name = new Label("PROPERTY"); private ArrayList<ArrayList<Property>> objectProperty = new ArrayList<>(); private LinkedList<Shape> selected = new LinkedList<>(); private Shape nowShape; private ScrollBar scrollBar = new ScrollBar(); private Group layout = new Group(); public ArrayList<ArrayList<Property>> getObjectProperty() { return objectProperty; } public Label getName() { return name; } public PropertyBar(MainPane fa) { scrollBar.setOrientation(Orientation.VERTICAL); scrollBar.setPrefWidth(20); scrollBar.layoutXProperty().bind(prefWidthProperty().subtract(scrollBar.getPrefWidth())); scrollBar.prefHeightProperty().bind(heightProperty()); getChildren().add(scrollBar); scrollBar.valueProperty().addListener((value, pre, now)-> { layout.setLayoutY(-now.doubleValue()); }); setOnScroll(event -> { scrollBar.setValue(scrollBar.getValue()-event.getDeltaY()); }); setPrefWidth(250); this.fa=fa; setStyle("-fx-background-color: #ffffff"); Light.Point light = new Light.Point(); light.setColor(Color.BLACK); light.xProperty().bind(widthProperty().divide(2)); light.yProperty().bind(heightProperty().divide(2)); light.setZ(300); Lighting lighting = new Lighting(); lighting.setLight(light); lighting.setSurfaceScale(50.0); name.setFont(Font.font("Arial Black", 30)); name.setTextFill(Color.BLACK); name.setLayoutX(40); Group group = new Group(name); group.setEffect(new Bloom(0.1)); layout.getChildren().add(group); getChildren().add(layout); } public void initBind() { DragToSuit dragToSuit = new DragToSuit(Main.getChangeCursor()); this.setOnMouseEntered(dragToSuit); this.setOnMouseExited(dragToSuit); this.setOnMouseMoved(dragToSuit); this.setOnMouseDragged(dragToSuit); this.setOnMousePressed(dragToSuit); this.setOnMouseReleased(dragToSuit); } public class DragToSuit implements EventHandler<MouseEvent> { private ChangeCursor changeCursor; private boolean pressed = false; public DragToSuit(ChangeCursor changeCursor) { this.changeCursor = changeCursor; } @Override public void handle(MouseEvent event) { if(event.getEventType().equals(MouseEvent.MOUSE_ENTERED)) { if(event.getX()<10) { Main.getScene().setCursor(Cursor.E_RESIZE); } } else if(event.getEventType().equals(MouseEvent.MOUSE_EXITED)) { Main.getScene().setCursor(changeCursor.future); } else if(event.getEventType().equals(MouseEvent.MOUSE_MOVED)) { if(!pressed) { if (event.getX() >= 10) { Main.getScene().setCursor(changeCursor.future); } else { Main.getScene().setCursor(Cursor.E_RESIZE); } } } else if(event.getEventType().equals(MouseEvent.MOUSE_PRESSED)) { if(event.getX()<10) { pressed = true; setPrefWidth(getWidth()-event.getX()); } } else if(event.getEventType().equals(MouseEvent.MOUSE_DRAGGED)) { if(pressed) { setPrefWidth(getWidth()-event.getX()); } } else if(event.getEventType().equals(MouseEvent.MOUSE_RELEASED)) { pressed = false; } } } public void setName(String name) { this.name.setText(name); } public void update(Shape shape) { delete(shape); add(shape); } public void add(Shape shape) { add(shape, fa.getMyCenter().getObject().getChildren().indexOf(shape)); } public void add(Shape shape, int index) { objectProperty.add(new ArrayList<>()); ArrayList<Property> now = objectProperty.get(index); if(shape instanceof Line)//startX startY endX endY strokeWidth Color blendMode { Line line = (Line)shape; now.add(shape.layoutXProperty()); now.add(shape.layoutYProperty()); now.add(line.startXProperty()); now.add(line.startYProperty()); now.add(line.endXProperty()); now.add(line.endYProperty()); now.add(line.strokeProperty()); now.add(line.rotateProperty()); now.add(line.strokeWidthProperty()); double x=line.endYProperty().getValue()-line.startYProperty().getValue(); double y=line.endXProperty().getValue()-line.startYProperty().getValue(); double width=line.strokeWidthProperty().doubleValue(); double length=Math.sqrt(x*x+y*y)*width; Property area=new SimpleDoubleProperty(length); Property perimeter=new SimpleDoubleProperty(2*(width+length)); now.add(area); now.add(perimeter); } else if(shape instanceof CubicCurve) { CubicCurve curve = (CubicCurve)shape; now.add(shape.layoutXProperty()); now.add(shape.layoutYProperty()); now.add(curve.startXProperty()); now.add(curve.startYProperty()); now.add(curve.endXProperty()); now.add(curve.endYProperty()); now.add(curve.controlX1Property()); now.add(curve.controlY1Property()); now.add(curve.controlX2Property()); now.add(curve.controlY2Property()); now.add(curve.strokeProperty()); now.add(curve.fillProperty()); now.add(curve.rotateProperty()); now.add(curve.strokeWidthProperty()); } else if(shape instanceof Ellipse) { Ellipse ellipse = (Ellipse)shape; now.add(shape.layoutXProperty()); now.add(shape.layoutYProperty()); now.add(ellipse.centerXProperty()); now.add(ellipse.centerYProperty()); now.add(ellipse.radiusXProperty()); now.add(ellipse.radiusYProperty()); now.add(ellipse.strokeProperty()); now.add(ellipse.fillProperty()); now.add(ellipse.rotateProperty()); now.add(ellipse.strokeWidthProperty()); if(ellipse.getRadiusX()==ellipse.getRadiusY()){ //System.out.println(ellipse.radiusXProperty()); SimpleDoubleProperty simpleDoubleProperty = new SimpleDoubleProperty(2 * Math.P