使ProgressRing在MahApps.Metro中变小

Question

看起来，MahApps.Metro ProgressRing控件的最小大小为60x60。

ProgressRing有一个名为"IsLarge“的属性，但即使将其设置为"False”，也似乎对能够使ProgressRing小于60x60没有任何影响。

显然，改变高度和宽度属性也不影响这一点。

将GitHUb看作是ProgressRing的实际c#代码，似乎有几个属性会影响椭圆直径等，但这些属性是私有属性，不能通过外部调用来设置。

我怎么才能把这个变小呢？比如说20x20还是30x30？

在下面的代码中我指定了IsLarge=False，并将大小设置为30x30，但它仍然默认为60x60.。

<Window x:Class="WpfApplication3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colours.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Orange.xaml" />
                <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Window.Resources>
         <Grid>
            <Controls:ProgressRing IsActive="True" IsLarge="False" Height="30" Width="30"></Controls:ProgressRing>
        </Grid>
</Window>

下面的是从 GitHub - MahApps.Metro上找到的"ProgressRing.cs“文件的代码片段

namespace MahApps.Metro.Controls
{
    [TemplateVisualState(Name = "Large", GroupName = "SizeStates")]
    [TemplateVisualState(Name = "Small", GroupName = "SizeStates")]
    [TemplateVisualState(Name = "Inactive", GroupName = "ActiveStates")]
    [TemplateVisualState(Name = "Active", GroupName = "ActiveStates")]
    public class ProgressRing : Control


        private void SetMaxSideLength(double width)
        {
            MaxSideLength = width <= 60 ? 60.0 : width;
        }

        private void SetEllipseDiameter(double width)
        {
            if (width <= 60)
            {
                EllipseDiameter = 6.0;
            }
            else
            {
                EllipseDiameter = width * 0.1 + 6;
            }
        }

        private void UpdateLargeState()
        {
            Action action;

            if (IsLarge)
                action = () => VisualStateManager.GoToState(this, "Large", true);
            else
                action = () => VisualStateManager.GoToState(this, "Small", true);

            if (_deferredActions != null)
                _deferredActions.Add(action);

            else
                action();
        }

EDIT:MainWindow.xaml

<Grid>
    <Controls:ProgressRing x:Name="PRing" IsLarge="False" MinHeight="15" MinWidth="15" Height="15" Width="15"></Controls:ProgressRing>
</Grid>

EDIT:MainWindow.xaml.cs

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            PRing.EllipseDiameter = 5;
        }
    }

Answer 1

您必须为ProgressRing找到一种样式，并为自己设置Width和Height。对我来说，样式位于：MahApps.Metro master \ MahApps.Metro \ Themes \ ProgressRing.xaml

<Style TargetType="{x:Type Controls:ProgressRing}">
    <Setter Property="Foreground" Value="{DynamicResource AccentColorBrush}"/>
    <Setter Property="IsHitTestVisible" Value="False"/>
    <Setter Property="HorizontalAlignment" Value="Center"/>
    <Setter Property="VerticalAlignment" Value="Center"/>
    <Setter Property="MinHeight" Value="30"/>
    <Setter Property="MinWidth" Value="30"/>

...

默认情况下，有Width和Height of 60。据我所知，易集Width和Height只直接影响椭圆。

EDIT:

让戒指更小的是，您可以通过代码来处理参数EllipseDiameter和EllipseOffset，因为它们是不可用的(私有的)。

private void SetEllipseDiameter(double width)
{
    if (width <= 60)
    {
        EllipseDiameter = 3.0; // as default 6.0
    }
    else
    {
        EllipseDiameter = width * 0.1 + 6;
    }
}

private void SetEllipseOffset(double width)
{
    if (width <= 60)
    {
        EllipseOffset = new Thickness(0, 12, 0, 0); // as default 24
    }
    else
    {
        EllipseOffset = new Thickness(0, width * 0.4 + 12, 0, 0);
    }
}

EDIT2:

要设置Ellipse的直径，可以如下所示。我们确实有EllipseDiameter设置器的属性

public double EllipseDiameter
{
    get 
    {
        return (double)GetValue(EllipseDiameterProperty); 
    }

    set // default as private
    {
        SetValue(EllipseDiameterProperty, value);
    }
}

在SetEllipseDiameter中，正在检查Ellipse的大小，如果Width小于60，则设置为6.0。我们评论一下。

private void SetEllipseDiameter(double width)
{
    //if (width <= 60)
    //{
    //    EllipseDiameter = 6.0;
    //}
    //else
    //{
    //    EllipseDiameter = width * 0.1 + 6;
    //}
 }

在Style中，Ellipse的直径是这样的：

<Setter Property="MinHeight" Value="30"/>
<Setter Property="MinWidth" Value="30"/>
<Setter Property="EllipseDiameter" Value="3.0" />

EllipseOffset也是如此。他也是，一开始也是私人的，并且检查一个小于60的Width：

private void SetEllipseOffset(double width)
{
    // you can drop this check
    if (width <= 60)
    {
        EllipseOffset = new Thickness(0, 24, 0, 0); 
    }
    else
    {
        EllipseOffset = new Thickness(0, width * 0.4 + 24, 0, 0);
    }
}

使用这些参数伪造这些操作，您可以配置Width和Height的ProgressRing控件。