RangeSlider Not Updated After Setting Values

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njsokalski asked May 5, '22 LeonLu-MSFT commented May 9, '22

RangeSlider Not Updated After Setting Values

I have the following method that I use to update my com.google.android.material.slider.RangeSlider view (the values assigned to ValueFrom, ValueTo, Values[0] & Values[1] are actually calculated, I just have literals here for simplicity, but I have confirmed that my calculated values are correct):

 private void UpdateDisplayedRangeSlider()
 {
     //Remember current values
     int currminvalue = this.rsDisplayedValues.Values[0].IntValue();
     int currmaxvalue = this.rsDisplayedValues.Values[1].IntValue();
     //Temporarily set values to 0
     this.rsDisplayedValues.Values[0] = (Java.Lang.Float)0f;
     this.rsDisplayedValues.Values[1] = (Java.Lang.Float)0f;
     //Update ValueFrom/ValueTo
     this.rsDisplayedValues.ValueFrom = (Java.Lang.Float)-100f;
     this.rsDisplayedValues.ValueTo = (Java.Lang.Float)100f;
     //Set new selected values
     this.rsDisplayedValues.Values[0] = (Java.Lang.Float)-50f
     this.rsDisplayedValues.Values[1] = (Java.Lang.Float)50f
 }

When the values are updated, the RangeSlider does not show the changes (the properties have the correct values, but the thumbs do not move). This is my first time using the RangeSlider (or any of the Slider views). Is there something else I need to do to display the new values?

dotnet-xamarin

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Answer 1 · 2022-05-06T02:48:47.417Z

LeonLu-MSFT answered May 6, '22 LeonLu-MSFT commented May 9, '22

Hello,

You can use setValues to set selected values. So I change your UpdateDisplayedRangeSlider method like following code. I tried to use this.rsDisplayedValues.Values[0], I get the same result as yours, it not work.

private void UpdateDisplayedRangeSlider()
        {
            //Remember current values
            int currminvalue = this.rsDisplayedValues.Values[0].IntValue();
            int currmaxvalue = this.rsDisplayedValues.Values[1].IntValue();
            //Temporarily set values to 0
            Float[] values1 = { (Float)(0f), (Float)(0f) };
           this.rsDisplayedValues.SetValues(values1);

           
            //Update ValueFrom/ValueTo
            this.rsDisplayedValues.ValueFrom = -100f;
            this.rsDisplayedValues.ValueTo =100f;


            //Set new selected values
           Float[] values = { (Float)(-50.0f), (Float)50.0f };
           this.rsDisplayedValues.SetValues(values);

        }

Best Regards,

Leon Lu

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njsokalski · May 06 at 04:05 PM

Thanks! Using SetValues seems to have fixed it! Just out of curiosity, when you said

I get the same result as yours, it not work.

did you actually mean "I get the same result as yours, it now work."?

0 ·

LeonLu-MSFT njsokalski · May 09 at 01:14 AM

No. Using this.rsDisplayedValues.Values[0] is not working, but I use rsDisplayedValues.SetValues(values); is working.

0 ·

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