how to know then length of a text.

hi

as you know we can know the heiht ot a text ,I wonder how to get the length
of a text,

thanks

 

Hi,
You can get the length of a text-object by getting the boundingbox of a textobject. This function returns the lower left corner and the upper right corner of the text-object. A little calculation will get you the length of the text-object. BTW, be careful with text-rotation!

objText.GetBoundingBox varMin, varMax


Michel

 

thanks,
i understand.
regards
------------------------

textobject. This function returns the lower left corner and the upper right
corner of the text-object. A little calculation will get you the length of
the text-object. BTW, be careful with text-rotation!

 

but if the text is rotated, GetBoundingBox will not give us the length of
it.

is that so.

thank you

 

but if the text is rotated, GetBoundingBox will not give us the length of

You are correct, but you can calculate the length if you know the bounding
box and the text angle, I think. I attached a bitmap that shows the formula
to find the text length (shown as the bold line in the sketch). The
calculation is for text rotation angles less than 90 degrees. For angles
from 90 deg to 360 deg, the formula may change a little, but would be very
similar. The variables in the sketch are:

Ltext = the text length you are looking for
Htext = the text height
theta = the text rotation angle
Lbb = the x-direction length of the bounding box

Hope this is useful to you. I don't have time to check my math, so there
is no warranty with this sketch.

James

 

That is correct. Here is one solution:

1) Store the rotation of the text in a variable.
2) Change the rotation of the text to zero.
3) Get the bounding box of the text.
4) Restore the text's original rotation from the variable.