Hello World!

This is Professor Joy.

I'm talking about using draw.io.

There are a lot of

diagrams that are going to be used,

And draw.IO is free.

I'm going to select create new diagram.

Because I know.

The first time you're in there you don't have anything to open.

And these are some of the diagrams we might be

drawing: a class diagram,

Entity relationship diagram.

All sorts of other choices that we have.

But for right now I'm going to pick a blank diagram.

And then select create.

The first thing I would do when I am

learning new software

Is to explore everything, look at all of the menu choices.

And see what's there.

Set it we can do.

Explorer

the environment.

One of the symbols you're going to be using a lot is a square.

A square is used for entities.

An entity is a noun. [or noun phrase]

It's always upper case.

It is always singular.

If I click in the middle,

I can type in

the name of an entity. So you can see that's uppercase it's

singular and we use a square for entities.

That text goes with the

square if we move it.

And we have a grid

That we can use to line up the shape.

We can also.

hide the grid when we are

completely finished, we'll hide it so that we

can get a nice screenshot without those

grid lines that we're going to use to

Arrange our

shapes. And we can we can change the size of the grid

and the color and we can change

the color of

some of the shapes.

And so that's an entity.

And we are also going to use a process.

A process can be either a rounded square [or a circle]

Which we can do by selecting rounded.

We can also add a shadow to things to

Give them a little interest, and of course we can change

color and type on this. A process is a verb or verb phrase.

Just as the entity

can be a noun phrase.

So a process might be a student is going to

Submit assignment.

And we need an

arrow for that.

And we want a directional arrow.

I click on tha,t and then I'm going to

use my grid to line this all up nice and neat.

I add an

arrow. And if we connect that, you'll see the arrow will stay

with the shapes that we gave it. [connected it to.]

In most cases arrows need text.

And We have text and then I'm going to

drag that over by my arrow.

Make this a student submits paper.

Move that down. You can also use the arrow keys

to move that down and get that.

Exactlyright.

But thsat is not connected to the boxes.

If we move the boxes will have to redo those.

We could also use

General shapes.

But I would explore what some of the other shapes are.

And just so you maybe look through your texts and see

what kind of drawings you're going to be required to draw.

And I'm doing this at the

beginning when I'm first learning. Not at night when I have

half an hour get an assignment in,

but when I can just relax and

Play with it.

And make sure

that everything

is working the way I want it to, and I'm able to save the

changes. If we save we can

Give it a name and it'll be downloaded. Then you can

take it from your downloads and move it to your

coursework [folder]

Unified modeling language and there's some special shapes we use for that. We are also going to be drawing those later on.

And if we wanted to draw something.

Wasn't really up a graph with arrows we can look for some

other shapes and

Use some of these shapes like that for some of the diagrams.

And then of course, when

We're all finished.

We're going to hide that grid so that we can take a screenshot of my nice and neat diagram.

We only use the grid for

aligning things.

And you should just experiment with it not when

you've got something due, but now when you got some

time just to experiment. And that's it.