change size button in runtime (wpf)

Why size does not change in IsMouseOver?

                   <Style开发者_开发问答 x:Key="GlassButton" TargetType="{x:Type Button}">
    <Setter Property="SnapsToDevicePixels" Value="True"/>
    <Setter Property="OverridesDefaultStyle" Value="True"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Grid>
                    <!-- Background Layer -->
                    <Ellipse Fill="{TemplateBinding Background}"/>
                    <!-- Refraction Layer -->
                    <Ellipse x:Name="RefractionLayer">
                        <Ellipse.Fill>
                            <RadialGradientBrush GradientOrigin="0.496,1.052">
                                <RadialGradientBrush.RelativeTransform>
                                    <TransformGroup>
                                        <ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1.5" ScaleY="1.5"/>
                                        <TranslateTransform X="0.02" Y="0.3"/>
                                    </TransformGroup>
                                </RadialGradientBrush.RelativeTransform>
                            </RadialGradientBrush>
                        </Ellipse.Fill>
                    </Ellipse>
                    <!-- Reflection Layer -->
                    <Path x:Name="ReflectionLayer" VerticalAlignment="Top" Stretch="Fill">
                        <Path.RenderTransform>
                            <ScaleTransform ScaleY="0.5" />
                        </Path.RenderTransform>
                        <Path.Data>
                            <PathGeometry>
                                <PathFigure IsClosed="True" StartPoint="98.999,45.499">
                                    <BezierSegment Point1="98.999,54.170" Point2="89.046,52.258" Point3="85.502,51.029"/>
                                    <BezierSegment
                            IsSmoothJoin="True"
                            Point1="75.860,47.685"
                            Point2="69.111,45.196"
                            Point3="50.167,45.196"/>
                                    <BezierSegment Point1="30.805,45.196" Point2="20.173,47.741" Point3="10.665,51.363"/>
                                    <BezierSegment
                            IsSmoothJoin="True"
                            Point1="7.469,52.580"
                            Point2="1.000,53.252"
                            Point3="1.000,44.999"/>
                                    <BezierSegment Point1="1.000,39.510" Point2="0.884,39.227" Point3="2.519,34.286"/>
                                    <BezierSegment
                            IsSmoothJoin="True"
                            Point1="9.106,14.370"
                            Point2="27.875,0"
                            Point3="50,0"/>
                                    <BezierSegment Point1="72.198,0" Point2="91.018,14.466" Point3="97.546,34.485"/>
                                    <BezierSegment
                            IsSmoothJoin="True"
                            Point1="99.139,39.369"
                            Point2="98.999,40.084"
                            Point3="98.999,45.499"/>
                                </PathFigure>
                            </PathGeometry>
                        </Path.Data>
                        <Path.Fill>
                            <RadialGradientBrush GradientOrigin="0.498,0.526">
                                <RadialGradientBrush.RelativeTransform>
                                    <TransformGroup>
                                        <ScaleTransform
                               CenterX="0.5"
                               CenterY="0.5"
                               ScaleX="1"
                               ScaleY="1.997"/>
                                        <TranslateTransform X="0" Y="0.5"/>
                                    </TransformGroup>
                                </RadialGradientBrush.RelativeTransform>
                            </RadialGradientBrush>
                        </Path.Fill>
                    </Path>
                    <!-- ContentPresenter -->
                    <ContentPresenter Margin="0,2,0,0" HorizontalAlignment="Center" VerticalAlignment="Center"/>


                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Width" Value="200"/>
                        <Setter Property="Height" Value="200"/>
                        <Setter TargetName="RefractionLayer" Property="Fill">
                            <Setter.Value>
                                <RadialGradientBrush GradientOrigin="0.496,1.052">
                                    <RadialGradientBrush.RelativeTransform>
                                        <TransformGroup>
                                            <ScaleTransform
                                  CenterX="0.5"
                                  CenterY="0.5"
                                  ScaleX="1.5"
                                  ScaleY="1.5"/>
                                            <TranslateTransform  X="0.02" Y="0.3"/>
                                        </TransformGroup>
                                    </RadialGradientBrush.RelativeTransform>
                                    <GradientStop  Offset="1" Color="#00000000"/>
                                    <GradientStop Offset="0.45" Color="#FFFFFFFF"/>
                                </RadialGradientBrush>
                            </Setter.Value>
                        </Setter>
                        <Setter TargetName="ReflectionLayer" Property="Fill">
                            <Setter.Value>
                                <RadialGradientBrush GradientOrigin="0.498,0.526">
                                    <RadialGradientBrush.RelativeTransform>
                                        <TransformGroup>
                                            <ScaleTransform
                                  CenterX="0.5"
                                  CenterY="0.5"
                                  ScaleX="1"
                                  ScaleY="1.997"/>
                                            <TranslateTransform X="0" Y="0.5"/>
                                        </TransformGroup>
                                    </RadialGradientBrush.RelativeTransform>
                                    <GradientStop Offset="1" Color="#FFFFFFFF"/>
                                    <GradientStop Offset="0.85" Color="#BBFFFFFF"/>
                                    <GradientStop Offset="0" Color="#00000000"/>
                                </RadialGradientBrush>
                            </Setter.Value>


                        </Setter>
                    </Trigger>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter TargetName="RefractionLayer" Property="Fill">
                            <Setter.Value>
                                <RadialGradientBrush GradientOrigin="0.496,1.052">
                                    <RadialGradientBrush.RelativeTransform>
                                        <TransformGroup>
                                            <ScaleTransform
                                  CenterX="0.5"
                                  CenterY="0.5"
                                  ScaleX="1.5"
                                  ScaleY="1.5"/>
                                            <TranslateTransform X="0.02" Y="0.3"/>
                                        </TransformGroup>
                                    </RadialGradientBrush.RelativeTransform>

                                </RadialGradientBrush>
                            </Setter.Value>
                        </Setter>
                        <Setter TargetName="ReflectionLayer" Property="Fill">
                            <Setter.Value>
                                <RadialGradientBrush GradientOrigin="0.498,0.526">
                                    <RadialGradientBrush.RelativeTransform>
                                        <TransformGroup>
                                            <ScaleTransform
                                  CenterX="0.5"
                                  CenterY="0.5"
                                  ScaleX="1"
                                  ScaleY="1.997"/>
                                            <TranslateTransform X="0" Y="0.5"/>
                                        </TransformGroup>
                                    </RadialGradientBrush.RelativeTransform>
                                </RadialGradientBrush>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Example Usage :

 <Button Style="{DynamicResource GlassButton}"  Content="Button" Height="23" HorizontalAlignment="Left" Margin="534,262,0,0" Name="button1" VerticalAlignment="Top" Width="75" />

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You have a property setting precedence issue. See the precedence table on WPFTutorial.net (see Value resolution strategy section).

Remove the Height and Width settings on your Button and if you need the initial sizes add these setters to your style:

<Setter Property="Height" Value="23"/>
<Setter Property="Width" Value="75"/>

And, be careful with Blend adding sizes for you....