COMP$10062$: Assignment $1$

O Sam Scott, Mohawk College

The Assignment: Bar or Line Graph

This assignment is about variables, data types, arithmetic expressions, and flow of control. You will use

the FXGraphicsTemplate for this assignment $($or the FXAnimationTemplate if you decide to use

animations$).$

Here are some example graphs. They were created in Excel, not by a Java program.

Instructions

Use the FXGraphicsTemplate for this assignment. Change the class name to something meaningful and

change the window title, and size of the stage to whatever you want.

When your app runs, the first thing you should do is have a dialog with the user using

System.in and

System.out $($don$\text{'}$t show the JavaFX stage until after this dialog is over$).$ The app should ask the user to

enter the following information for a graph:

Graph Title

Range of values $($e$.$g$.0$ to $2000,$ as in the graphs above$)$ for the vertical axis

A series of labels for the horizontal axis and the corresponding value for each label to be

graphed. You may choose to implement a line graph $($using points connected by lines$)$ or a bar

graph $($using vertical bars$)$

Make sure the user cannot enter any values outside of the range they specified. If they do try to enter a

value outside of the range, prompt the user to try again.

The vertical axis should have labels for the minimum and maximum values as provided by the user, as

well as at least one point between those values, positioned appropriately.

As the user is entering labels and $($legal$)$ values, you should be drawing either a bar for each value, or a

point that is connected by a line to the last point entered. You will have to keep track of the current $x$

value for each point or bar, and you'll have to compute the $Y$ value for the point or top of the bar by

scaling the value the user enters based on the range they specified.

For example, if the minimum value is $100$ and the maximum is $300,$ then the range is $200.$ If the user

enters $150,$ convert it to a decimal like this: $\frac{150-100}{200}=0\mathrm{.}25.$ Then if you know your graph is $500$ px

high, multiply by $500$ to figure out how far up the graph the point or bar should go$.$

You should display your own programming credits on the screen as well $($i$.$e$.$ "program by Josephine

Smith" or something like that$).$

Finally, show the stage.

Documentation Standards

Don't forget to follow the Documentation Standards for the course $($i$.$e$.$ Javadoc commenting,

meaningful variable and class names, consistent indenting$).$ See Documentation Standards on Canvas.

Handing In

Please see MyCanvas for instructions on when the assignment is due and the format required to hand

the assignment in$.$

Evaluation

Your assignment will be evaluated for

performance $(40\%),$ structure $(40\%)$ and

documentation $(20\%)$ using the rubric on

the MyCanvas Assignment.

Extra challenge $2$: Add images to your display to dress it

up some more.

Image img $=$ new Image $("$imagename$.$jpg$")$;

gc$.$drawImage $($img$,x,y)$