how to drawtext in the middle of canvas

張家倫

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Jul 20, 2016, 2:58:49 AM7/20/16

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hello everyone~~

I have a problem...

I want to drawtext in the middle of the canvas((just like the topic...

but I have some question...

let me explain:

how can let TextAlignment work??@@

because the block drawtext have to give it the X and Y...

it makes the text didn't draw in the middle...

I have surfed so many information...

but nothing can help me to fix it

I need somebody help me...

and my English is poor...

please forgive me

I will thank you a lot~~><

Ghica

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Jul 20, 2016, 5:24:37 AM7/20/16

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In the designer you can set the text alignment to left, right or center (center is the default I think). This means that the text will be drawn centered to the x,y point you specify. You must also take care of the fontsize, and adjust y accordingly, otherwise the text my be higher that you think. Experiment!!
Cheers, Ghica.

ScottFerguson

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Jul 20, 2016, 7:06:36 AM7/20/16

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As Ghica says.

Use center alignment and canvas.Width/2 for the drawtext x value.

And when positioning in the y direction set the drawtext y value to canvas.Height/2 + canvas.FontSize/2

Abraham Getzler

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Jul 20, 2016, 12:38:19 PM7/20/16

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Good to know! I was wondering what that attribute meant.

Sample app published here ...

ai2.appinventor.mit.edu/?galleryId=4843586337374208

and in attachments .

ABG

blocks.png

Samaritan.aia

2016-07-20 12_31_29-5554__build_.png

張家倫

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Jul 21, 2016, 12:51:32 AM7/21/16

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so...the textalignment can't work...

we always have to give the x and y

and the textalignment just for looking...

or it just a decoration, is it??@@

whether we set the textalignment or not we still have to let the text in the middle by x and y??

Italo

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Jul 21, 2016, 1:11:04 AM7/21/16

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I think you don't understand how alignment works. It doesn't mean that the text will be aligned relative to the screen. It's relative to the X,Y provided in your DrawText block.

And of course you always have to give the X,Y. If not, how is the app supposed to know where you want your text placed?

This is how the alignment options are used in App Inventor 2.

Ghica

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Jul 21, 2016, 3:11:55 AM7/21/16

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Wow. If that is not clear...
These are chocolate letters! (We eat them in december).
Cheers, Ghica.

張家倫

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Jul 21, 2016, 5:07:37 AM7/21/16

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OK~~I got it~~

thank for everyone~~QAQ

I know I am not a smart student...

To be my teacher(I mean all of you) is a very difficult test....@@

so thank for everyone~~I really appreciate~~>0<

Ghica

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Jul 21, 2016, 5:49:31 AM7/21/16

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Now, can you tell me what QAQ means?
In my language this sounds as something ducks say.
Cheers, Ghica.

張家倫

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Jul 21, 2016, 7:16:38 AM7/21/16

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oh~~this is a face

it mean cry~~

QAQ the O is eyes

and \ is tears

the A is mouth

so QAQ is a crying face

sometimes you can use it to express you are be touched

or you are really appreciate~~

if I cry because of feeling sad

I will type TAT

It is real sad

so it is for me not the formal use((I think...

Ghica

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Jul 21, 2016, 8:02:30 AM7/21/16

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I understand. Be happy!

張家倫

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Jul 21, 2016, 9:12:13 AM7/21/16

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you too~~thank for everything you help~~^^

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