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OK, so we've got this brush size slider and we can move it around, but what what size is this right

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now?

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We don't know.

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How big is this?

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How big is this like?

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We don't know.

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So let's create a little label inside of here that shows us exactly what size it is whenever we're moving

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this thing around.

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So let's do that real quick.

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So let's head back over to our code and let's create another comment here and let's go brush slider

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label and let's call this slider underscore label.

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And that's going to be a label this is a label widget, and we where do we want to put this where we

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want to put it in this frame, this brush size frame that we put that there and we want the tax to equal

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whatever the slider is.

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So what do we call our slider?

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We call it my slider so we can just set it equal to my slider doget.

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And this is a function.

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So this will get whatever the slider happens to be at the moment.

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Right.

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So now we can slider underscore label, dot pack and that should be fine.

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We could give it a pad y of, I don't know, five or something to push it down a little bit and say

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this.

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Let's run it.

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Let's take a look at this, because this is going to be interesting.

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So if we run this.

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We see it's at 10 because remember, when we define this thing way back here, we set the value, the

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default value at 10.

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So it's ten now, but if we move this.

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It's not updating, so we need to change that.

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So you remember when we created the slider, we gave it a command of change brush size.

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So we have that function up here and we haven't actually done anything with it.

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Now we just put past for now.

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One thing I will mention right now, hit the tab button on your keyboard to tab over.

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Do not hit the space bar a bunch of times.

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Python.

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Python is tab sensitive, so you have to actually tab over for functions.

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So now we can actually come down here and grab this slider label that we just created.

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Come up here and let's go slide relator label.

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Dot config.

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And so the text equal to that same thing we just did down here, my slider doget.

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And we can pass that in now, any time this function gets called, which is any time the slider moves,

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it will update this label with whatever the current position is from my slider, not get let's go and

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save this and let's run this guy again.

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Now, check this out.

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This is kind of weird if we do this, it's still not moving.

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And that's because, remember, this is all these errors we got earlier.

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It's saying our brush size function takes zero positional arguments, but one was given.

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What does that mean?

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Well, if we look at our code here, usually you pass things into a function and when you create your

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slider and.

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This brush size function gets called the widget is actually passing its current position, sort of like

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its event, right.

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Like we did earlier when we passed in this E!

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Right, so it's passing that information in, but we haven't actually programmed it to accept that,

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right.

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We haven't put anything here so we can do anything we want.

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I could just type in thing.

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We're just going to pass a thing and we're not actually ever going to use it in here, but we still

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have to account for it by putting that there.

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So if we save this now, if we come back here.

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Run this again.

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And move this around, you'll see as we move this, it changes.

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Now check this out.

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Eighty six point one eight six oh four, that's a long decimal number.

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And in Python, decimals are called floats.

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And we don't actually want to float here.

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We just want the integer.

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We just wanted to say eighty six.

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We don't really care that it's eighty six point one eight or seventy point zero six or whatever.

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We you know, this is just too sloppy.

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So how can we change that?

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We can do that really easily by heading over here and instead of just passing that whole float, we

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can actually convert this to the integer just by calling some quotation marks and let's go percent.

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Zero point zero F and then we want to pass in.

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Let's convert this from a to a float.

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And like that.

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And so this this little guy right here will take this and sort of swap out for this and turn it into

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an integer so it'll get rid of the decimals zero point zero.

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So if we save this and it's run this guy again, we may have to do this twice, let's say, here.

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Now and that works.

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So now it's say seventy seven, ninety four, seventy, sixty, etc..

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OK, so.

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We're still not changing the actual brush size when we change this yet, so let's go ahead and do that

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real quick.

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So if we look at our paint function where we're actually drawing on the screen, remember, we're passing

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the width of brush with.

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And that is just we put it at 20 instead of putting it at 20.

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We can actually just grab this thing right here.

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And copy it and just put it right there, the same thing here, we're changing it from the float to

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whatever that is and where my slider getting that from the slider.

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And if we just save this, this should now work.

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Let's come back here and run this again.

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That's pretty small, you can change it to 68.

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It's pretty big, you go all the way down to one very small.

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All the way up to one hundred room, very big, right?

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So, all right, just like that.

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That works, so that's how we change the brush size pretty is pretty straightforward.

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It took us a few videos to get there, but it was all pretty simple.

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The only weird thing about this really was.

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This thing right here, this is just basic python here where we're converting from a float, we're just

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changing the format of it, using this sort of substitution thing here.

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Right.

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And that's all there is to it.

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All right.

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So we've got our brush with done in the next video.

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We'll look at brush type.