How to set WPFExtensions.ZoomControl Default Zoom

Does any开发者_如何学Goone know how to set the default zoom level to 1:1 in the ZoomControl included in wpfextensions? When the project first starts the default behavior is to zoom to fill.

I have tried both

 <zoom:ZoomControl Mode="Original">

and

 <zoom:ZoomControl Zoom="1">

both didn't work...

Looks like you have to set the Mode property to Original, or you can explicitly call ZoomToOriginal in a Loaded event handler for the ZoomControl.

It also appears that the EqualityToBooleanConverter will throw an exception, when it shouldn't. The code looks like:

public class EqualityToBooleanConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return object.Equals(value, parameter);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if ((bool)value)
            return parameter;

        //it's false, so don't bind it back
        throw new Exception("EqualityToBooleanConverter: It's false, I won't bind back.");
    }
}

You would need to remove that exception and return Binding.DoNothing, instead.

That converter is used in the control template of ZoomControl, like so:

<RadioButton Content="1:1"
    GroupName="rbgZoomMode"
    IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent},Path=Mode,Converter={StaticResource equalityConverter},ConverterParameter={x:Static Controls:ZoomControlModes.Original}}" />
<RadioButton Content="Fill"
    GroupName="rbgZoomMode"
    IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent},Path=Mode,Converter={StaticResource equalityConverter},ConverterParameter={x:Static Controls:ZoomControlModes.Fill}}" />

So effectively, it's trying to only bind back to the source if value is true. But it throws an exception, as you've seen.