我在画布上有一个图像,我将画布的大小设置为图像的大小(我希望画布尽可能小)。现在我想对图像应用阴影效果,但是某些部分因为它们位于画布之外而被剪裁。所以我需要在不缩放图像的情况下增加画布。
我能够手动缩放图像,但是我不想触摸图像而是增加画布大小。
这是我尝试过的,但图像会随着画布缩放。
<Canvas ClipToBounds="True" Name="ImageDropShadowThumbnail" Height="{Binding Height}" Width="{Binding Width}">
<Canvas.LayoutTransform>
<ScaleTransform ScaleX="{Binding Value, ElementName=ScaleXSlider}" ScaleY="{Binding Value, ElementName=ScaleYSlider}" CenterX="{Binding CenterX}" CenterY="{Binding CenterY}"/>
</Canvas.LayoutTransform>
<Image Source="{Binding Name}" Height="{Binding Height}" Width="{Binding Width}" Stretch="None" HorizontalAlignment="Center" VerticalAlignment="Center">
<Image.Effect>
<DropShadowEffect BlurRadius="{Binding Value, ElementName=BlurRadiusSlider}" Direction="{Binding Value, ElementName=DirectionSlider}" Opacity="{Binding Value, ElementName=OpacitySlider}" ShadowDepth="{Binding Value, ElementName=ShadowDepthSlider}"/>
</Image.Effect>
</Image>
</Canvas>
答案 0 :(得分:1)
<Canvas Background="CadetBlue" Width="{Binding ElementName=Image1, Path=Width, Converter={StaticResource HeightConverter}}"
Height="{Binding ElementName=Image1, Path=Height, Converter={StaticResource HeightConverter}}">
<Image Name="Image1" Source="1.jpg" Width="150" Height="150" Stretch="Fill"/>
</Canvas>
[ValueConversion(typeof(double), typeof(double))]
public class HeightConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
double result;
Double.TryParse(value.ToString(), out result);
return result + 20.0;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
因为你把它放在画布上,它将默认放在左上角,所以需要设置Canvas.Left / Top等。