Q:

(Geometry: two rectangles intersect?) Write a program that enables the user to specify the location and size of the rectangles and displays whether the two rectangles intersect, as shown in Figure 16.39b

Asmaa
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2022-06-28
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(Geometry: two rectangles intersect?) Write a program that enables the user to specify the location and size of the rectangles and displays whether the two rectangles intersect, as shown in Figure 16.39b. Enable the user to point the mouse inside a rectangle and drag it. As the rectangle is being dragged, the rectangle’s center coordinates in the text fields are updated.

 

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Asmaa
2022-06-28
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/*********************************************************************************
* (Geometry: two rectangles intersect?) Write a program that enables the user to *
* rectangles specify the location and size of the rectangles and displays        *
* whether the two intersect, as shown in Figure 16.39b. Enable the user to point *
* the mouse inside a rectangle and drag it. As the rectangle is being dragged,   *
* the rectangle’s center coordinates in the text fields are updated.             *
*********************************************************************************/
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.geometry.Pos;
import javafx.scene.paint.Color;

public class Exercise_16_09 extends Application {
	protected Rectangle rectangle = getRectangle();
	protected Pane paneForRectangles = new Pane(rectangle);
	protected TablePane table = new TablePane();

	@Override // Override the start method in the Application class
	public void start(Stage primaryStage) {
		// Create a table
		paneForRectangles.getChildren().addAll(
			table.getRectangle1(), table.getRectangle2());

		// Create a button
		Button btRedrawCircles = new Button("Redraw Rectangles");

		// Create a vbox
		VBox pane = new VBox();
		pane.setAlignment(Pos.CENTER);
		pane.getChildren().addAll(intersect(), paneForRectangles,
			table, btRedrawCircles);

		// Create and register handlers
		btRedrawCircles.setOnAction(e -> {
			table.redraw();
			pane.getChildren().remove(0);
			pane.getChildren().add(0, intersect());
		});

		table.getRectangle1().setOnMouseDragged(e -> {
			if (table.getRectangle1().contains(e.getX(), e.getY())) {
				table.setRectangle1X(e.getX() - (table.getRectangle1Width() / 2));
				table.setRectangle1Y(e.getY() - (table.getRectangle1Height() / 2));
				table.setTfRectangle1X(String.valueOf(e.getX() 
					- (table.getRectangle1Width() / 2)));
				table.setTfRectangle1Y(String.valueOf(e.getY() 
					- (table.getRectangle1Height() / 2)));
			}
			pane.getChildren().remove(0);
			pane.getChildren().add(0, intersect());
		});

		table.getRectangle2().setOnMouseDragged(e -> {
			if (table.getRectangle2().contains(e.getX(), e.getY())) {
				table.setRectangle2X(e.getX() - (table.getRectangle2Width() / 2));
				table.setRectangle2Y(e.getY() - (table.getRectangle2Height() / 2));
				table.setTfRectangle2X(String.valueOf(e.getX() 
					- (table.getRectangle2Width() / 2)));
				table.setTfRectangle2Y(String.valueOf(e.getY() 
					- (table.getRectangle2Height() / 2)));
			}
			pane.getChildren().remove(0);
			pane.getChildren().add(0, intersect());
		});

		// Create a scene and place it in the stage
		Scene scene = new Scene(pane);
		primaryStage.setTitle("Exercise_16_08"); // Set the stage title
		primaryStage.setScene(scene); // Place the scene in the stage
		primaryStage.show(); // Display the stage
	}

	/** Creates a text stating if circles intersect */
	private Text intersect() {
		return new Text("Two circles intersect? " +
			(isIntersect() ? "Yes" : "No"));
	}

	/** Returns true if circles inIntersect */
	private boolean isIntersect() {
		return 
			(getDistance(table.getRectangle2X(), table.getRectangle1X() + 
				table.getRectangle1Width()) < 
				table.getRectangle1Width() + table.getRectangle2Width() &&
		  	(getDistance(table.getRectangle2Y(), table.getRectangle1Y() + 
		  		table.getRectangle1Height()) < 
		  		table.getRectangle1Height() + table.getRectangle2Height())) &&
			(getDistance(table.getRectangle1X(), table.getRectangle2X() + 
				table.getRectangle2Width()) < 
				table.getRectangle1Width() + table.getRectangle2Width() &&
		  	(getDistance(table.getRectangle1Y(), table.getRectangle2Y() + 
		  		table.getRectangle2Height()) < 
		  		table.getRectangle1Height() + table.getRectangle2Height())); 
	}

	/** Return distance */
	private double getDistance(double p1, double p2) {
		return Math.sqrt(Math.pow(p2 - p1, 2));
	}

	/** Return a rectangle */
	private Rectangle getRectangle() {
		Rectangle r = new Rectangle(0, 0, 280, 110);
		r.setStroke(Color.WHITE);
		r.setFill(Color.WHITE);
		return r;
	}
}

TablePane.java

import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.scene.layout.HBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.geometry.Pos;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;

public class TablePane extends HBox {
	// Data Field
	private TextField tfRectangle1X = new TextField();
	private TextField tfRectangle1Y = new TextField();
	private TextField tfRectangle1Width = new TextField();
	private TextField tfRectangle1Height = new TextField();
	private TextField tfRectangle2X = new TextField();
	private TextField tfRectangle2Y = new TextField();
	private TextField tfRectangle2Width = new TextField();
	private TextField tfRectangle2Height = new TextField();
	private Rectangle rectangle1 = new Rectangle(79.0, 20.0, 40.0, 50.0);;
	private Rectangle rectangle2 = new Rectangle(110.0, 33.0, 50.0, 20.0);
	private VBox paneForTable1;
	private VBox paneForTable2;

	/** Construct a default TablePane */
	TablePane() {
		rectangle1.setStroke(Color.BLACK);
		rectangle1.setFill(Color.WHITE);
		rectangle2.setStroke(Color.BLACK);
		rectangle2.setFill(Color.WHITE);
		setTextProperties();
		getTable();
	}

	/** Return rectangle1 */
	public Rectangle getRectangle1() {
		return rectangle1;
	}

	/** Return rectangle2 */
	public Rectangle getRectangle2() {
		return rectangle2;
	}

	/** Return rectangle1 x */
	public double getRectangle1X() {
		return rectangle1.getX();
	}

	/** Return rectangle2 x */
	public double getRectangle2X() {
		return rectangle2.getX();
	}

	/** Return rectangle1 y */
	public double getRectangle1Y() {
		return rectangle1.getY();
	}

	/** Return rectangle2 y */
	public double getRectangle2Y() {
		return rectangle2.getY();
	}

	/** Set new rectangle1 x */
	public void setRectangle1X(double x) {
		rectangle1.setX(x);
	}

	/** Set new rectangle1 width */
	public void setRectangle1Width(double width) {
		rectangle1.setWidth(width);
	}

	/** Set new rectangle1 height */
	public void setRectangle1Height(double height) {
		rectangle1.setHeight(height);
	}

	/** Return rectangle1 width */
	public double getRectangle1Width() {
		return rectangle1.getWidth();
	}

	/** Return rectangle1 height */
	public double getRectangle1Height() {
		return rectangle1.getHeight();
	}

	/** Return rectangle2 height */
	public double getRectangle2Height() {
		return rectangle2.getHeight();
	}

	/** Return rectangle2 width */
	public double getRectangle2Width() {
		return rectangle2.getWidth();
	}

	/** Set new rectangle1 y */
	public void setRectangle1Y(double y) {
		rectangle1.setY(y);
	}

	/** Set new rectangle2 x */
	public void setRectangle2X(double x) {
		rectangle2.setX(x);
	}

	/** Set new rectangle2 y */
	public void setRectangle2Y(double y) {
		rectangle2.setY(y);
	}

	/** Set new text */
	public void setTfRectangle1X(String text) {
		tfRectangle1X.setText(text);
	}

	/** Set new text */
	public void setTfRectangle1Y(String text) {
		tfRectangle1Y.setText(text);
	}

	/** Set new text */
	public void setTfRectangle1Width(String text) {
		tfRectangle1Width.setText(text);
	}

	/** Set new text */
	public void setTfRectangle1Height(String text) {
		tfRectangle1Height.setText(text);
	}

	/** Set new text */
	public void setTfRectangle2X(String text) {
		tfRectangle2X.setText(text);
	}

	/** Set new text */
	public void setTfRectangle2Y(String text) {
		tfRectangle2Y.setText(text);
	}

	/** Set new text */
	public void setTfRectangle2Width(String text) {
		tfRectangle2Width.setText(text);
	}

	/** Set new text */
	public void setTfRectangle2Height(String text) {
		tfRectangle2Height.setText(text);
	}


	/** Add two Tables to vbox */
	private void getTable() {
		// Create table for rectangle1 
		paneForTable1 = getTable(tfRectangle1X, 
			tfRectangle1Y, tfRectangle1Width, tfRectangle1Height, 1);
		
		// Create table for rectangle2 
		paneForTable2 = getTable(tfRectangle2X, 
			tfRectangle2Y, tfRectangle2Width, tfRectangle2Height, 2);

		getChildren().addAll(paneForTable1, paneForTable2);
	}

	/** Return a table */
	private VBox getTable(TextField x, TextField y, 
		TextField width, TextField height, int n) {
		VBox vBox = new VBox(2);
		vBox.setStyle("-fx-border-color: Black");
		vBox.getChildren().addAll(new Label("Enter rectangle " + 
			n + " info:"), getGrid(x, y, width, height));
		return vBox;
	}

	/** Return a grid pane of rectangle info */
	private GridPane getGrid(TextField x, TextField y, 
		TextField width, TextField height) {
		GridPane gridPane = new GridPane();
		gridPane.setHgap(5);
		gridPane.setVgap(2);
		gridPane.add(new Label("X:"), 0, 0);
		gridPane.add(x, 1, 0);
		gridPane.add(new Label("Y:"), 0, 1);
		gridPane.add(y, 1, 1);
		gridPane.add(new Label("Width:"), 0, 2);
		gridPane.add(width, 1, 2);
		gridPane.add(new Label("Height:"), 0, 3);
		gridPane.add(height, 1, 3);
		return  gridPane;
	}

	/** Set retangles to text field data */
	public void redraw() {
		if (Double.parseDouble(tfRectangle1X.getText()) != rectangle1.getX()) {
			rectangle1.setX(Double.parseDouble(tfRectangle1X.getText()));
		}

		if (Double.parseDouble(tfRectangle1Y.getText()) != rectangle1.getY()) {
			rectangle1.setY(Double.parseDouble(tfRectangle1Y.getText()));
		}

		if (Double.parseDouble(
			tfRectangle1Width.getText()) != rectangle1.getWidth()) {
			rectangle1.setWidth(Double.parseDouble(tfRectangle1Width.getText()));
		}

		if (Double.parseDouble(
			tfRectangle1Height.getText()) != rectangle1.getHeight()) {
			rectangle1.setHeight(Double.parseDouble(tfRectangle1Height.getText()));
		}

		if (Double.parseDouble(tfRectangle2X.getText()) != rectangle2.getX()) {
			rectangle2.setX(Double.parseDouble(tfRectangle2X.getText()));
		}

		if (Double.parseDouble(tfRectangle2Y.getText()) != rectangle2.getY()) {
			rectangle2.setY(
				Double.parseDouble(tfRectangle2Y.getText()));
		}

		if (Double.parseDouble(
			tfRectangle2Width.getText()) != rectangle2.getWidth()) {
			rectangle2.setWidth(
				Double.parseDouble(tfRectangle2Width.getText()));
		}

		if (Double.parseDouble(
			tfRectangle2Height.getText()) != rectangle2.getHeight()) {
			rectangle2.setHeight(
				Double.parseDouble(tfRectangle2Height.getText()));
		}
 
	}

	/** Set default text field properties */
	private void setTextProperties() {
		tfRectangle1X.setPrefColumnCount(3);
		tfRectangle1Y.setPrefColumnCount(3);
		tfRectangle1Width.setPrefColumnCount(3);
		tfRectangle1Height.setPrefColumnCount(3);
		tfRectangle2X.setPrefColumnCount(3);
		tfRectangle2Y.setPrefColumnCount(3);
		tfRectangle2Width.setPrefColumnCount(3);
		tfRectangle2Height.setPrefColumnCount(3);
		tfRectangle1X.setText(String.valueOf(rectangle1.getX()));
		tfRectangle1Y.setText(String.valueOf(rectangle1.getY()));
		tfRectangle1Width.setText(String.valueOf(rectangle1.getWidth()));
		tfRectangle1Height.setText(String.valueOf(rectangle1.getHeight()));
		tfRectangle2X.setText(String.valueOf(rectangle2.getX()));
		tfRectangle2Y.setText(String.valueOf(rectangle2.getY()));
		tfRectangle2Width.setText(String.valueOf(rectangle2.getWidth()));
		tfRectangle2Height.setText(String.valueOf(rectangle2.getHeight()));
		setAlignment(Pos.CENTER);
		setSpacing(5);
	}
}

 

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