Hello Scott,

Please excuse me for the delay. There is a feature request to allow entering decimal values without 0 (like .4). About the decimal point and the masked input, this doesn't work because by default the no-mask values are considered as integer input while typing (unless you preset the value to a decimal one). To allow this, you can set the FormatString property of the masked input control. For example:

 <telerik:RadMaskedCurrencyInput FormatString="F2"/>

If you prefer, a non-static format string, you can check the DynamicFormatString SDK example.

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

Thank you again for the feedback. Working on it and will get back to you within the next couple of days with more information on this.

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

We've reviewed the project and this seems as an expected behavior. In order to change it and allow minus when the Value is still null, you will need to set the MaskedInputExtensions.AllowMinusOnNullValue attached property to True.

xmlns:maskedInput="clr-namespace:Telerik.Windows.Controls.MaskedInput;assembly=Telerik.Windows.Controls.Input"

 <telerik:RadMaskedCurrencyInput maskedInput:MaskedInputExtensions.AllowMinusOnNullValue="True"/>        

Can you try this and let me know if it helps?

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

Thank you for the report. We are going to check what is happening and see how to proceed in the next few days.

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

I've logged a separate item for this issue since it is a bit different and related it to this item in the internal backlog. To work this around, you can override the HandleSubstractKey() method of the RadMaskedInput control and manually add the minus sign to the text.

protected override bool HandleSubstractKey()
{
	if (this.Value == null)
	{
		this.IsNegativeValue = !this.IsNegativeValue;
		var tb = this.FindChildByType<PreviewInputTextBox>();
		if (!string.IsNullOrEmpty(tb.Text))
		{
			if (this.IsNegativeValue)
			{
				tb.Text = "-" + tb.Text;
			}
			else
			{
				tb.Text = tb.Text.Substring(1);
			}
		}
	}
	else
	{
		base.HandleSubstractKey();
	}
   
	return true;
}

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

Thank you for the project and the additional information.

This case originates from a ticket raised by another user with a issue different than the one in the last project and the ticket you mentioned. If I am correct, you mean the one with the custom RadGridView's GridViewAmountColumn. Anyway, I will further research this and get back to you within the next few hours with more information on the topic.

Regards,
Martin Ivanov
Progress Telerik

Hello Scott,

An alternative solution is to override the OnPropertyChanged() method of RadMaskedNumericInput and in case the Value property is changed to update the protected IsNegativeValue property. 

public class CustomMaskedNumericInput : RadMaskedNumericInput
{
	protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
	{
		if (e.Property.Name == "Value")
		{
			this.DetermineIsNegativeValue();
		}
		base.OnPropertyChanged(e);
	}

	private void DetermineIsNegativeValue()
	{
		if (this.Value != null)
		{
			if (this.Value < 0)
			{
				this.IsNegativeValue = true;
			}
			else if (this.Value > 0)
			{
				this.IsNegativeValue = false;
			}
			else
			{
				bool allowMinus = MaskedInputExtensions.GetAllowMinusOnZeroValue(this);
				if (!allowMinus && this.IsNegativeValue)
				{
					this.IsNegativeValue = false;
				}
			}
		}
		else
		{
			this.IsNegativeValue = false;
		}
	}
}

You can also see this approach shown in the attached project. Can you please try it and let me know if it helps?

Regards,
Martin Ivanov
Progress Telerik