Android Question [Solved] Finding Character Width with B4XCanvas

[Roger Daley]

Hi All,

I am trying to find a Chr.width with B4XCanvas in order to set the text size of an edittext correctly. [nothing new.]

With Canvas this is basically the code I have used in the past.

Private Canvas1 As Canvas

Canvas1.Initialize(Activity)
fontsize as Float  = 26
chrwidth as Float
chrwidth = Canvas1.MeasureStringWidth("9", Typeface.DEFAULT, fontsize)

... and then through a loop adjust the font size to match the edittext.

In B4XPages using B4XCanvas I don't have a "FontSize" parameter. In searching a few examples what is done in respect of FontSize escapes me.

Private Canvas1 As B4XCanvas
Private ChrRect  As B4XRect
fontsize as Float  = 26
chrwidth as Float
Canvas1.Resize(Panel1.width, Panel1.height)
ChrRect = B4XCanvas1.MeasureText("9", Typeface.DEFAULT)
ChrWidth = ChrRect.Width

Somewhere the size of the font is included, any hints would be great.

Regards Roger

 

[klaus]

B4XCanvas.MeasureText(Text As String, Font As B4XFont) As B4XRect

 

[Roger Daley]

Thanks Klaus,

I was just typing that I had solved my issue by creating a B4X font, which includes the font size when your post came through. Your expression is far more elegant than mine.

Private Canvas1 As B4XCanvas
Private ChrRect  As B4XRect
Private Xfont As B4XFont = xui.CreateDefaultFont(fontsize)
fontsize as Float  = 26
chrwidth as Float
Canvas1.Resize(Panel1.width, Panel1.height)
ChrRect = B4XCanvas1.MeasureText("9", Xfont)
ChrWidth = ChrRect.Width

Many Thanks Klaus