I have a composable in which I have to calculate t...

# compose-android

[Mahmoo]

I have a composable in which I have to calculate the height and width that is available for that composable..I am setting its size from caller.
It has a modifier params to which I am calling as modifier.fillMaxWidth().fillMaxHeight(.5f)

I need the height to calculate the bars of my music player.

[Mahmoo]

Tried Approach - Use the hoisted height variable and Calculate the size on GloballyChanged and set the value to hoisted height variable . The problem is that I have a canvas and I need to draw bars in the canvas depeending on the height that is available to the composable

[Mahmoo]

Bars doesn;t seem to draw and it appears blank

[Kirill Grouchnikov]

Canvas draw block gets size from which you can get current width and height

[Mahmoo]

You will be surprised to know that the height of the canvas is coming out be 3x the height of the BoxWithContainer that contains it...

Any Idea why?

[Mahmoo]

image.png

[Kirill Grouchnikov]

No code - no way to know where the problem is

[Kirill Grouchnikov]

It’s not exactly 3x, but it may be a very specific density of the device - since you’re having one height in dp units and another (canvas) in pixels

[Mahmoo]

https://pastebin.com/gAtJwNcL

Have a look!

[Mahmoo]

Yeah you are right

[Kirill Grouchnikov]

What exactly are you asking to look at? Canvas reports its size in pixels, and up top you report the height of the screen in dp units

[Mahmoo]

Understood about canvas.

When I called

val canvasHeight = size.height.toDp().value

The height of canvas is coming out to be proper for the calculations that I need... Thanks🙌