How do I get the proportion of the Vertical bar?

Questions
1

Hi there,
I have a new question, I would like to scroll my text in my ScrollBar. I managed to do that, but now I would like to be able to get the size of the Vertical bar back from the thing that goes down into my vertical bar. I did some research in the documentation and everything but the only size I can find is the total size of the vertical Bar. Do you have a way to find the proportion of the small scrolling bar in the vertical Bar, so that I can vary the scrolling speed.
Thank you in advance, Mathieu

2

pinging @JohnK who authored the control :slight_smile:

3

Good question for which I do not have a good answer. The bars are based on the slider control and as far as I know the slider thumb is based on the overall size of the slider and so on the overall size of the scroll viewer and its contents.

I did not build in a method of changing the size of the slider thumb to control the speed. Sorry.

4

I don’t want to change the size, I want to know the proportion between the vertical bar and the slider thumb so I can maybe do (size of the slider/ size of vertical bar) to control the speed. But It seems we can’t do that for now ^^ Thank you :slight_smile:

5

Hi there,
I might (I hope it is a may or only have :smiley: ) have a solution. Despite we can’t have the size of the sliders, we can have the number of lines in the TextBlock with the property “TextBlock.lines”, so If I have a speed for 14 lines of text for example, and I want the same speed for a text of 100 lines, It’s only a cross product I guess. I will try that way, I keep you in touch !

6

Hey,
So I have tried my way. It works , but it’s not a cross product.
In my case, I have a text of 17 lines, with a speed of 0.005 ( I have chosen this speed). Now I have a text of 120 lines. I would like to know the speed of the slider. If we do( 0.005x120/17) (cross product) , we have a the speed to read the text with the same time between the begin of the text and the end and not the “same proportion speed”. It’s not what I wanted. But if you do (0.005x17)/120, you have the same “proportion” speed. It is a kind of “speed/line” I was looking for.
I put that there if it can help someone.
Bye, Mathieu

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