Blur offset when using SizeToContent="WidthAndHeight" in AcrylicWindow

[AntonKosenkoDX]

[Barina]

Same here. can't find a workaround.
It also not rendering properly at first. after resizing it renders the whole window/control. doesn't have anything to do with SizeToContent though..

[sourcechord]

Hi @BeautyRazor @Barina

Thanks for the feedback.
I recognized this issue.

But it is little a bit difficult to fix.
I'll try to fix it in future update.

[sourcechord]

This is famous bug in WPF.
When use WindowChrome with SizeToContent="WidthAndHeight", WPF can't calculate the exact window size.

<Window x:Class="WpfApp1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        SizeToContent="WidthAndHeight"
        Title="MainWindow">
    <WindowChrome.WindowChrome>
        <WindowChrome GlassFrameThickness="-1"/>
    </WindowChrome.WindowChrome>
    <Grid Background="Beige" Width="300" Height="200">
        <TextBlock Margin="10"
                   HorizontalAlignment="Left"
                   VerticalAlignment="Top"
                   Text="TextBlock"
                   TextWrapping="Wrap" />
    </Grid>
</Window>

But I found a workaround for it.
The way is to call InvalidateMeasure method in OnContentRendered.

        protected override void OnContentRendered(EventArgs e)
        {
            base.OnContentRendered(e);

            if (this.SizeToContent != SizeToContent.Manual)
            {
                this.InvalidateMeasure();
            }
        }

In addition, it can be emmbeded in AcrylicWindow's implement.
So that, I'll try to fix it in next FluentWPF update.