/ Description: The Assignment7 class creates a CirclePane object using JavaFX ony

// on which we can draw circles with different

// colors.

import javafx.application.Application;

import javafx.stage.Stage;

import javafx.scene.Scene;

import javafx.scene.layout.StackPane;

public class Assignment7 extends Application

{

public void start(Stage primaryStage)

{

//create a CirclePane object.

CirclePane gui = new CirclePane();

//put gui on top of the rootPane

StackPane rootPane = new StackPane();

rootPane.getChildren().add(gui);

// Create a scene and place rootPane in the stage

Scene scene = new Scene(rootPane, 630, 540);

primaryStage.setTitle("Color Circle Grids");

primaryStage.setScene(scene); // Place the scene in the stage

// Description: CirclePane class creates a pane where we can use

// mouse key to drag on canvass and there will be some color following

// the mouse. We can also use combo boxes to change its colors and stroke widths

// //--- is where you need to add your own code

//import any necessary classes here

//----

import javafx.scene.control.ComboBox;

import javafx.scene.layout.Pane;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.VBox;

import javafx.scene.shape.Circle;

import javafx.scene.paint.Color;

import javafx.geometry.Insets;

import javafx.scene.layout.*;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.scene.input.MouseEvent;

public class CirclePane extends BorderPane

{

//instance variables - check assignment's description

//----

private ComboBox primaryColorCombo;

private ComboBox bgColorCombo;

private ComboBox widthCombo;

private Color primaryColor;

private Color secondaryColor;

private Color bgColor;

private int selectWidth;

private Circle[][] circleArray;

private final int NUM_COL =6, NUM_ROW = 6, RADIUS = 40;

private GridPane canvas; //this is where circles are drawn

//constructor

public CirclePane()

{

//Step #1: Initialize instance varibles and set up the layout

//----

//Instantiate the two dimensional circleArray that contains

//6 columns and 6 rows of circles (36 in total)

//----

//instantiate canvas and set its width and height

canvas = new GridPane();

canvas.setPrefWidth(2*RADIUS * NUM_COL);

canvas.setPrefHeight(2*RADIUS * NUM_ROW);

//Use nested loop to instantiate the 6 columns by 6 rows of

//Circle objects, add them inside the circleArrary

//----

//----

//leftPane is a VBox, it should contain labels and the 3 comboBox

VBox leftPane = new VBox();

leftPane.setSpacing(20);

leftPane.setPadding(new Insets(10, 10, 10, 10));

leftPane.setStyle("-fx-border-color: black");

//----

//add leftPane and canvas to CirclePane

//----

//Step 3: register the source nodes with its handler objects

//----

}

//Step #2(A) - MouseHandler

private class MouseHandler implements EventHandler

{

public void handle(MouseEvent event)

{

//handle MouseEvent here

//Note: you can use if(event.getEventType()== MouseEvent.MOUSE_DRAGGED)

//to check whether the mouse key is dragged or released, etc

//write your own codes here

//----

}

}//end MouseHandler

//Step #2(B) - Primary and secondary color handler

private class PrimaryColorHandler implements EventHandler

{

public void handle(ActionEvent event)

{

//Write your own code here

//----

}

}//end PrimaryColorHandler

//Step #2(C): background color handler

//Write a private class called BackgroundColorHandler that handles the background

//color changes

//----

//----

//Step #2(D): handle the stroke width

private class WidthHandler implements EventHandler

{

//write your own code

//----

//----

}//end of WidthHandler

} //end of CirclePane