Modify the clock pane class by adding complete clock numbers with ticks. 12, 1,

Question

Modify the clock pane class by adding complete clock numbers with ticks. 12, 1, 2, 3 4, 5, 6, 7, 8, 9, 10,11,12

import java.util.Calendar;

import java.util.GregorianCalendar;

import javafx.scene.layout.Pane;

import javafx.scene.paint.Color;

import javafx.scene.shape.Circle;

import javafx.scene.shape.Line;

import javafx.scene.text.Text;

public class ClockPane extends Pane {

private int hour;

private int minute;

private int second;

//Add custom width and height

private double width;

private double height;

/** Construct a default clock with the current time */

public ClockPane() {

setCurrentTime(); }

/** Construct a clock with specified hour, minute, and second */

public ClockPane(int hour, int minute, int second) {

this.hour = hour;

this.minute = minute;

this.second = second; }

/** Construct a clock with specified hour, minute, and second */ public ClockPane(int hour, int minute, int second,double width,double height) { this.hour = hour; this.minute = minute; this.second = second; this.width = width; this.height = height; } /** Return hour */ public int getHour() { return hour; } /** Set a new hour */ public void setHour(int hour) { this.hour = hour; paintClock(); } /** Return minute */ public int getMinute() { return minute; } /** Set a new minute */ public void setMinute(int minute) { this.minute = minute; paintClock(); } /** Return second */ public int getSecond() { return second; } /** Set a new second */ public void setSecond(int second) { this.second = second; paintClock(); } /* Set the current time for the clock */ public void setCurrentTime() { // Construct a calendar for the current date and time Calendar calendar = new GregorianCalendar(); // Set current hour, minute and second this.hour = calendar.get(Calendar.HOUR_OF_DAY); this.minute = calendar.get(Calendar.MINUTE); this.second = calendar.get(Calendar.SECOND); paintClock(); // Repaint the clock } /** Paint the clock */ private void paintClock() { // Initialize clock parameters //Use custom width and height double clockRadius = Math.min(width, height) * 0.8 * 0.5; double centerX = width / 2; double centerY = height / 2; // Draw circle Circle circle = new Circle(centerX, centerY, clockRadius); circle.setFill(Color.WHITE); circle.setStroke(Color.BLACK); Text t1 = new Text(centerX - 5, centerY - clockRadius + 12, "12"); Text t2 = new Text(centerX - clockRadius + 3, centerY + 5, "9"); Text t3 = new Text(centerX + clockRadius - 10, centerY + 3, "3"); Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, "6"); // Draw second hand double sLength = clockRadius * 0.8; double secondX = centerX + sLength * Math.sin(second * (2 * Math.PI / 60)); double secondY = centerY - sLength * Math.cos(second * (2 * Math.PI / 60)); Line sLine = new Line(centerX, centerY, secondX, secondY); sLine.setStroke(Color.RED); // Draw minute hand double mLength = clockRadius * 0.65; double xMinute = centerX + mLength * Math.sin(minute * (2 * Math.PI / 60)); double minuteY = centerY - mLength * Math.cos(minute * (2 * Math.PI / 60)); Line mLine = new Line(centerX, centerY, xMinute, minuteY); mLine.setStroke(Color.BLUE); // Draw hour hand double hLength = clockRadius * 0.5; double hourX = centerX + hLength * Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)); double hourY = centerY - hLength * Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12)); Line hLine = new Line(centerX, centerY, hourX, hourY); hLine.setStroke(Color.GREEN); getChildren().clear(); getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine); } @Override public void setWidth(double width) { super.setWidth(width); paintClock(); } @Override public void setHeight(double height) { super.setHeight(height); paintClock(); } } //Clock driver class: import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.layout.HBox; import javafx.stage.Stage; public class Clock extends Application { @Override public void start(Stage primaryStage) { double height = 400; double width = 400; //Create clock pane with height & width ClockPane clock = new ClockPane(4, 20, 45, width / 2, height/2); HBox hBox = new HBox(clock); Scene scene = new Scene(hBox, width, height); primaryStage.setScene(scene); primaryStage.setTitle("Clock"); primaryStage.show(); } public static void main(String[] args) { Application.launch(args); } }

Explanation / Answer

Ans:: I explained the program with comments here.Thank you.

///Program///

import java.util.Calendar; // import calender

import java.util.GregorianCalendar; // Gregorian_cal

import javafx.scene.layout.Pane; // pane

import javafx.scene.paint.Color; // color

import javafx.scene.shape.Circle; // circle

import javafx.scene.shape.Line; // Line

import javafx.scene.text.Text; // Text

import java.util.Collections; // collections

import javafx.animation.KeyFrame; // keyframe

import javafx.animation.Timeline; Timeline

import javafx.collections.ObservableList; // ObservbleLIST

import javafx.geometry.Point2D; // pOINT_2d

import javafx.scene.Node; // nODE

import javafx.util.Duration; // dURATION

// Clock-Pane_class

public class ClockPane extends Pane {

// int hour, min, secnd

private int hour;

private int minute;

private int second;

// handVisible true

private boolean hourHandVisible = true;

private boolean minuteHandVisible = true;

private boolean secondHandVisible = true;

private Timeline timeline;

// Clock_pane height & width

private double w = 300, h = 300;

// Construct default_clock with current_time

// ClockPane()

public ClockPane() {

setPrefHeight(h); // height-h

setPrefWidth(w); // width-w

// timeline

timeline = new Timeline(new KeyFrame(Duration.seconds(1), e -> update()));

// CycleCount

timeline.setCycleCount(Timeline.INDEFINITE);

// Current_Time

setCurrentTime();

}

// clock with secnd,min, hour

public ClockPane(int hour, int minute, int second) {

// this

this();

this.hour = hour; // hour

this.minute = minute; // min

this.second = second; // sec

// paint

paintClock();

}

// int hour, min, sec, double- width, height

public ClockPane(int hour, int minute, int second, double width, double height) {

// this

this(hour, minute, second);

this.w = width;

this.h = height;

// paint

paintClock();

}

// returns the hour

public int getHour() {

return hour;

}

// setting new hour

public void setHour(int hour) {

this.hour = hour;

paintClock();

}

// returns_minute

public int getMinute() {

return minute;

}

// sets new_minute

public void setMinute(int minute) {

this.minute = minute;

paintClock();

}

// retrns seconds

public int getSecond() {

return second;

}

// setting new seconds

public void setSecond(int second) {

this.second = second;

paintClock();

}

//retrbs clock_pane width

public double getW() {

return w;

}

// Setting clock-pane width

public void setW(double w) {

this.w = w;

paintClock();

}

// Returns clock-pane height

public double getH() {

return h;

}

// Settiong clock-pane height

public void setH(double h) {

this.h = h;

paintClock();

}

// boolean Hours hand visible

public boolean isHourHandVisible() {

// return

return hourHandVisible;

}

// boolean set visible

public void setHourHandVisible(boolean hourHandVisible) {

this.hourHandVisible = hourHandVisible;

paintClock();

}

// boolean min hand visibl

public boolean isMinuteHandVisible() {

// return

return minuteHandVisible;

}

// set min hand visibl

public void setMinuteHandVisible(boolean minuteHandVisible) {

this.minuteHandVisible = minuteHandVisible;

paintClock();

}

// bool secnd hand visible

public boolean isSecondHandVisible() {

// return

return secondHandVisible;

}

// set secnd visible- bool

public void setSecondHandVisible(boolean secondHandVisible) {

this.secondHandVisible = secondHandVisible;

paintClock();

}

// Setting current_time for clock

public void setCurrentTime() {

// gregorian_calender

Calendar calendar = new GregorianCalendar();

// Setting the current_hour, minute & sec

// this..hour

this.hour = calendar.get(Calendar.HOUR_OF_DAY);

// this.min

this.minute = calendar.get(Calendar.MINUTE);

// this.secnd

this.second = calendar.get(Calendar.SECOND);

// re_paints the clock

paintClock();

}

/// Paintint the clock

private void paintClock() {

// Initializing the clock_parameters radius_math.(w,h)

double clockRadius = Math.min(w, h) * 0.8 * 0.5;

// centerX = width divide by 2

double centerX = w / 2;

// centerY = height divide by 2

double centerY = h / 2;

// point_2D center x,y

Point2D center = new Point2D(centerX, centerY);

// Drawing the circle X,Y, radius

Circle circle = new Circle(centerX, centerY, clockRadius);

// filling white_color

circle.setFill(Color.WHITE);

// stroke black_color

circle.setStroke(Color.BLACK);

// Drawing the time numbers 1 to 12

Text[] texts = new Text[12];

// for loop for numbers 1 to 12

for (int i = 0; i < 12; i++) {

int time = (i + 3 > 12) ? i + 3 - 12 : i + 3;

// initialising object center X+ radius+ Math.cos(i * 2 * Math.PI / 12) and math.sin

Point2D b = new Point2D(

centerX + clockRadius * Math.cos(i * 2 * Math.PI / 12),

centerY + clockRadius * Math.sin(i * 2 * Math.PI / 12));

// point_Closer_to_A - center, b, 0.82

b = getPointBCloserToA(center, b, 0.82);

// text[]

texts[i] = new Text(b.getX() - (clockRadius * 0.03125), b.getY() + (clockRadius * 0.025), "" + time);

}

// Drawing the dashes

// Line[60]

Line[] dashes = new Line[60];

// for loop i< dashes

for (int i = 0; i < dashes.length; i++) {

// point_2D start centerX + clockRadius * Math.cos(i * 2 * Math.PI divide by 60), & math.sin

Point2D start = new Point2D(

centerX + clockRadius * Math.cos(i * 2 * Math.PI / 60),

centerY + clockRadius * Math.sin(i * 2 * Math.PI / 60));

// coefficient 0.955

double coefficient = (i % 5 == 0) ? 0.91 : 0.955;

// point_2D get Point B Closer To A

Point2D end = getPointBCloserToA(center,start, coefficient);

// dashes[i]

dashes[i] = new Line(start.getX(), start.getY(), end.getX(), end.getY());

}

// Drawing seconds_hand

// sLength r*0.8

double sLength = clockRadius * 0.8;

// seconX = centerX*sLength math.sin()

double secondX = centerX + sLength *

Math.sin(second * (2 * Math.PI / 60));

// secondY = centerY - sLength* math.cos()

double secondY = centerY - sLength *

Math.cos(second * (2 * Math.PI / 60));

Line sLine = new Line(centerX, centerY, secondX, secondY);

// set_ strome color= red

sLine.setStroke(Color.RED);

// set_visible

sLine.setVisible(isSecondHandVisible());

// Drawing the minuteshand

// m_Length

double mLength = clockRadius * 0.65;

// x_minute

double xMinute = centerX + mLength *

Math.sin(minute * (2 * Math.PI / 60));

// minuteY

double minuteY = centerY - mLength *

Math.cos(minute * (2 * Math.PI / 60));

// mLine

Line mLine = new Line(centerX, centerY, xMinute, minuteY);

// setStroke colour is blue

mLine.setStroke(Color.BLUE);

// set Visible

mLine.setVisible(isMinuteHandVisible());

// Drawing the hour hand

// h_Length

double hLength = clockRadius * 0.5;

// hour_X

double hourX = centerX + hLength *

Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));

// hour_Y

double hourY = centerY - hLength *

Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));

Line hLine = new Line(centerX, centerY, hourX, hourY);

hLine.setStroke(Color.GREEN);

hLine.setVisible(isHourHandVisible());

// Drawing the time (HH:MM:SS)

String s = "" + getHour() + ":" + getMinute() + ":" + getSecond();

Text timeText = new Text(getW() * 0.4, getH() - 10, s);

// Add_nodes to pane

getChildren().clear(); // clear()

ObservableList<Node> list = getChildren(); // List

list.add(circle); // circle

Collections.addAll(list, dashes); // collection

Collections.addAll(list, texts); // list, texts

list.addAll(sLine, mLine, hLine, timeText); // list.addAll

}

// start-- timeline.play()

public void start(){

timeline.play();

}

// stop()

public void stop(){

// pause

timeline.pause();

}

// update

private void update(){

setCurrentTime(); // curr timr

paintClock();

}

// private point_2D

private Point2D getPointBCloserToA(Point2D a, Point2D b, double coefficient) {

// deltaX

double deltaX = b.getX() - a.getX();

// deltaY

double deltaY = b.getY() - a.getY();

// return

return new Point2D(

a.getX() + coefficient * deltaX,

a.getY() + coefficient * deltaY);

}

}

//////// application ////////////

import javafx.application.Application; // import app

import javafx.geometry.Insets; // insets

import javafx.geometry.Pos; // pos

import javafx.scene.Scene; // scene

import javafx.scene.control.Button; // button

import javafx.scene.layout.BorderPane; // border pane

import javafx.scene.layout.HBox; // hbox

import javafx.stage.Stage; // stage

// publc class

public class ClockPane extends Application {

// overridng

@Override

// start and exception

public void start(Stage primaryStage) throws Exception {

// clock_pane

ClockPane clockPane = new ClockPane();

// start

clockPane.start();

// button start

Button btStart = new Button("Start");

// on_action e-> start

btStart.setOnAction(e -> clockPane.start());

// stop button

Button btStop = new Button("Stop");

// onAction stop()

btStop.setOnAction(e -> clockPane.stop());

// HBox start,stop

HBox hBox = new HBox(btStart, btStop);

// spacng -12

hBox.setSpacing(12);

// padding 12,12,12,12

hBox.setPadding(new Insets(12, 12, 12, 12));

// aligning to center

hBox.setAlignment(Pos.CENTER);

// borderpane setting

BorderPane borderPane = new BorderPane(clockPane, null, null, hBox, null);

// set_Scene

primaryStage.setScene(new Scene(borderPane));

// setTitle

primaryStage.setTitle("Clock");

// primStage.show()

primaryStage.show();

}

// main

public static void main(String[] args) {

// application launch()

Application.launch(args);

}

}

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