最简单的解决方案是使用 Viewbox,但也可以非常简单地计算 Window resize 的比例。
视图框
<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Viewbox Stretch="Uniform">
<Grid>
<Label>
Hello world
</Label>
</Grid>
</Viewbox>
</Window>
手动缩放
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow"
Name="myMainWindow"
Width="200" Height="250">
<Grid Name="MainGrid" SizeChanged="MainGrid_SizeChanged">
<Grid.LayoutTransform>
<ScaleTransform x:Name="ApplicationScaleTransform"
CenterX="0"
CenterY="0"
ScaleX="{Binding ElementName=myMainWindow, Path=ScaleValue}"
ScaleY="{Binding ElementName=myMainWindow, Path=ScaleValue}" />
</Grid.LayoutTransform>
<Grid VerticalAlignment="Center" HorizontalAlignment="Center" Height="150">
<TextBlock FontSize="20" Text="Hello World" Margin="5" VerticalAlignment="Top" HorizontalAlignment="Center"/>
<Button Content="Button" VerticalAlignment="Bottom" HorizontalAlignment="Center"/>
</Grid>
</Grid>
其中网格使用 LayoutTransform 进行缩放,该 LayoutTransform 通过引用编码的 ScaleValue 依赖属性来确定 ScaleX 和 ScaleY 属性,该属性是在 Window_Resize 事件期间使用类似于类似的代码计算的
#region ScaleValue Dependency Property
public static readonly DependencyProperty ScaleValueProperty = DependencyProperty.Register("ScaleValue", typeof(double), typeof(MainWindow), new UIPropertyMetadata(1.0, new PropertyChangedCallback(OnScaleValueChanged), new CoerceValueCallback(OnCoerceScaleValue)));
private static object OnCoerceScaleValue(DependencyObject o, object value)
{
MainWindow mainWindow = o as MainWindow;
if (mainWindow != null)
return mainWindow.OnCoerceScaleValue((double)value);
else
return value;
}
private static void OnScaleValueChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
MainWindow mainWindow = o as MainWindow;
if (mainWindow != null)
mainWindow.OnScaleValueChanged((double)e.OldValue, (double)e.NewValue);
}
protected virtual double OnCoerceScaleValue(double value)
{
if (double.IsNaN(value))
return 1.0f;
value = Math.Max(0.1, value);
return value;
}
public double ScaleValue
{
get
{
return (double)GetValue(ScaleValueProperty);
}
set
{
SetValue(ScaleValueProperty, value);
}
}
#endregion
private void CalculateScale()
{
double yScale = ActualHeight / 250f;
double xScale = ActualWidth / 200f;
double value = Math.Min(xScale, yScale);
ScaleValue = (double)OnCoerceScaleValue(MainGrid, value);
}