c# - Avalonia UI缩放问题

我可能可以为每个大小参数创建绑定，并使用某种缩放因子在应用程序启动时重新计算最佳大小，但这将需要一堆新代码，并且难以实现字体大小。

最终这就是我所做的。我必须创建一个完整的单独的命名空间来容纳执行此操作所需的所有类。因此，要输入此答案的代码太多了，但是如果有人感兴趣，我会将完整的代码放在GitHub上。

基本上，一切都归结为像这样遍历Avalonia LogicalTree：

/// <summary>
/// Recursively registers all <see cref="ILogical"/>s in <paramref name="logicals"/> to the <paramref name="bindingContext"/>.
/// </summary>
/// <param name="logicals">A <see cref="Queue{T}"/> containing the root controls that will be recursively registered.</param>
/// <param name="bindingContext">The <see cref="BindingContext"/> the <see cref="ScalableObject"/>s will be registered to.</param>
public static void RegisterControls(Queue<IEnumerable<ILogical>> logicals, BindingContext bindingContext)
{
    while (logicals.Count > 0)
    {
        IEnumerable<ILogical> children = logicals.Dequeue();
        foreach (ILogical child in children)
        {
            logicals.Enqueue(child.GetLogicalChildren());
            if (child is AvaloniaObject avaloniaObject)
            {
                ScalableObject scalableObject = new ScalableObject(avaloniaObject);
                bindingContext.Add(scalableObject);
            }
        }
    }
}

我的构造函数ScalableObject如下所示：

/// <summary>
/// Initializes a new <see cref="ScalableObject"/> from the provided <paramref name="avaloniaObject"/>.
/// </summary>
/// <param name="avaloniaObject">The <see cref="AvaloniaObject"/> to be mapped to this new instance of <see cref="ScalableObject"/>.</param>
public ScalableObject(AvaloniaObject avaloniaObject)
{
    if (avaloniaObject is TextBlock textBlock)
    {
        Register(avaloniaObject, TextBlock.FontSizeProperty, textBlock.FontSize);
    }
    if (avaloniaObject is TemplatedControl templatedControl)
    {
        Register(avaloniaObject, TemplatedControl.FontSizeProperty, templatedControl.FontSize);
    }
    if (avaloniaObject is Border border)
    {
        Register(avaloniaObject, Border.CornerRadiusProperty, border.CornerRadius);
    }
    // .... This goes on like this for a while
}

然后，我可以对所有创建的绑定应用新的UI缩放因子，如下所示：

/// <summary>
/// Applies the specified <paramref name="scalingFactor"/> to this <see cref="ScalableObject"/> and all of it's children.
/// </summary>
/// <param name="scalingFactor">The scaling factor to be applied to all <see cref="IScalable"/>s of this <see cref="ScalableObject"/>.</param>
public void ApplyScaling(double scalingFactor)
{
    PreScalingAction?.Invoke();
    foreach (IScalable binding in Bindings.Values)
    {
        binding.ApplyScaling(scalingFactor);
    }
    PostScalingAction?.Invoke();
}

同样，要在此答案中放入太多代码，但希望它能使你对我的解决方案的实现方式有所了解。

结果如下：

可以缩放到这个