Text Width??

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Bill Norris

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In stringutils, we have the MeasureMultilineTextHeight feature to help determine the proper height of a label with multiple lines of text. I would like a similar feature to get the width of a text string, so as to set the width of a label dynamically based on the length of the text assigned to it. Any ideas on getting some kind of "text width" ??
 
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Bill Norris

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RE:

To experiment with this, I put in the following code in a button click event:

B4X: 
Dim C As Canvas
Dim X As Int
X=C.MeasureStringWidth("textwidth",default_font,30)
Msgbox(x,"")

I received a Null Pointer Exception error when I ran it. BTW, value of default_font is assigned in activity_create, and functions as desired throughout the app.
 
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klaus

Expert
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Longtime User
You must initialize the Canvas:
B4X: 
Dim C As Canvas
C.Initialize(Activity)
Dim X As Int
X = C.MeasureStringWidth("textwidth", default_font, 30)
Msgbox(x,"")
Best regards.
 
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