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please help me, how can I find out the width of an object?

Community Beginner ,
May 03, 2024 May 03, 2024

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var page_body = document.getElementsByTagName("body")[0];

Hello.
Please tell me. )
I placed a square object on the canvas, and converted it into a symbol.
Gave him a name - chief
Now I'm writing code - 

 

page_body.style.overflow = "hidden";
page_body.style.position = "fixed";
var page_canvas = document.getElementsByTagName("canvas")[0];

var _this = this;

console.log("_this.chief.y - "+_this.chief.y);

console.log("_this.chief.x - "+_this.chief.x);

console.log("_this.chief.width - "+_this.chief.width);

 

console output - 

 

_this.chief.y - 351.05
_this.chief.x - 372.05
_this.chief.width - undefined

 

please help me, how can I find out the width of an object?

 

 

 

 

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correct answers 1 Correct answer

Community Expert , May 04, 2024 May 04, 2024

Hi.

 

If it is a CreateJS object created by Animate, you can use nominalBounds.width. If Animate didn't create this property for a CreateJS object, you can use, for many cases, getBounds() or getTransformedBounds() and then access the width if the result is not null.

 

Regards,

JC

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Community Expert ,
May 04, 2024 May 04, 2024

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Hi.

 

If it is a CreateJS object created by Animate, you can use nominalBounds.width. If Animate didn't create this property for a CreateJS object, you can use, for many cases, getBounds() or getTransformedBounds() and then access the width if the result is not null.

 

Regards,

JC

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Community Beginner ,
May 04, 2024 May 04, 2024

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Thank you

should I fix the code?

_this.chief.nominalBounds.width       

 

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Community Expert ,
May 04, 2024 May 04, 2024

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You're welcome.

 

What value do you get when you run _this.chief.nominalBounds.width?

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Community Expert ,
May 04, 2024 May 04, 2024

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and to use getBounds() and getTransformedBounds(), enable multiframe bounds in your publish settings.

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Community Expert ,
May 04, 2024 May 04, 2024

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This is not needed.

 

Enabling Multiframes bounds creates a frameBounds property for each frame of a Movie Clip symbol that tels the developer the x, y, width and height of all the instances in that particular frame as whole.

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Community Expert ,
May 04, 2024 May 04, 2024

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i don't recall either getbounds working unless it's enabled. are you saying that's no longer needed?

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Community Expert ,
May 04, 2024 May 04, 2024

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It's needed when the instance's bounding box changes due to a internal geometric change of its children. The nominalBounds property only contains information about the general bounding box of that instance when it's created at author time, but if we need to get the updated bounding box of a instance at runtime we need to use getBounds() and getTransformedBounds().

 

And getBounds() and getTransformedBounds() will only fail if we use it in objects that can't calculate their own bounds, like shapes. For this cases we should call setBounds first.

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Community Expert ,
May 04, 2024 May 04, 2024

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are you saying a one frame movieclip can use getbounds without changing settings?

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Community Expert ,
May 04, 2024 May 04, 2024

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Yep.

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Community Expert ,
May 04, 2024 May 04, 2024

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this.a.getBounds() is undefined for movieclip a without changing settings.

 

(and you made me walk all the way into my house to my computer to test.)

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Community Expert ,
May 04, 2024 May 04, 2024

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It works because Animate creates CreateJS's display objects and CreateJS's display objects implement getBounds. The only exception, if setBounds is not used, is a shape.

 

I've worked in hundreds of HTML5 Canvas projects and have never turned Multiframe bounds on.

 

Multiframe bounds creates bounds for frames and not for individual display object instances. So it doesn't affect how getBounds works.

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Community Expert ,
May 04, 2024 May 04, 2024

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Your test is probably missing something.

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Community Expert ,
May 04, 2024 May 04, 2024

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the only thing it's missing is multiframe bounds.

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Community Expert ,
May 04, 2024 May 04, 2024

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Community Expert ,
May 05, 2024 May 05, 2024

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in that link, i don't see anything that accounts for what i see.

 

kglad_0-1714916955779.png

 

 

enable frame bounds in the publish setting and both lines of code return the same.

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Community Expert ,
May 05, 2024 May 05, 2024

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The link explains what Multiframe bounds is.

image.png

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Community Expert ,
May 05, 2024 May 05, 2024

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Also, do you mind sending your test FLA?

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Community Expert ,
May 05, 2024 May 05, 2024

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no problem.  (and thank you.)

 

https://www.kglad.com/Files/forums/not_enabled.fla

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Community Expert ,
May 05, 2024 May 05, 2024

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Thanks for the file, k.

 

Just run your file without modifications and got this:

image.pngimage.png

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Community Expert ,
May 05, 2024 May 05, 2024

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i have no explanation.  this isn't anything new.  i've seen this since the first version of animate cc that allowed canvas files.

 

 

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