<UserControl x:Class="CircleCornerButton"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:new_termonal_06_12"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300"
             MaxHeight="250" MaxWidth="250">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate >
                            <Grid>
                                <Grid.RowDefinitions >
                                    <RowDefinition/>
                                    <RowDefinition/>
                                    <RowDefinition/>
                                    <RowDefinition/>
                                </Grid.RowDefinitions>

                                <Grid.ColumnDefinitions >
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                    <ColumnDefinition/>
                                </Grid.ColumnDefinitions>

                                <Ellipse Grid.RowSpan="4"
                                         Grid.ColumnSpan ="4"
                                         SnapsToDevicePixels="True" 
                                         Width="{Binding ActualHeight ,RelativeSource={RelativeSource Self}}"
                                    Fill="LemonChiffon">
                                </Ellipse>

                                <Viewbox   Grid.Row="0" 
                                           Grid.Column ="2"
                                           Grid.RowSpan="2"
                                           Grid.ColumnSpan="2">
                                    <Grid Width="Auto" Height="Auto" >

                                        <Ellipse  
                                                 Fill="Green" 
                                                 Margin="-2"
                                                 SnapsToDevicePixels="True" 
                                                 MaxHeight="35"
                                                 MaxWidth="35"
                                                 VerticalAlignment="Top" 
                                                 HorizontalAlignment="Left" 
                                                 MinHeight="25"
                                                 MinWidth="25"
                                                 Height="{Binding ActualWidth ,RelativeSource={RelativeSource Self}}"/>

                                        <TextBlock  
                                            MaxHeight="35"
                                            MaxWidth="35"
                                            Grid.Row="1"
                                            Grid.Column ="0"
                                            Text="15" 
                                            TextAlignment="Center"
                                            VerticalAlignment="Top" 
                                            HorizontalAlignment="Center"/>
                                        
                                    </Grid>
                                </Viewbox>
                                
                                <!--<ContentPresenter HorizontalAlignment="Center"
                                  VerticalAlignment="Center"/>-->
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>

        </Grid.Resources>
        <Button />
    </Grid>
</UserControl>