WPF - 采用父级的大小
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原文地址: http://stackoverflow.com/questions/10832745/
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WPF - Adopt size of parent
提问by Ian
I'm trying to figure out the best way to size some controls but can't quite get it right. I have a window that adds on a custom control:
我试图找出调整某些控件大小的最佳方法，但不能完全正确。我有一个添加自定义控件的窗口：
<Grid x:Name="LayoutRoot">
<my:RateGraph Grid.Column="0" x:Name="rateGraph1" Height="88" Width="380" />
</Grid>
I then wish to size the sub-components of this control defined in the XAML to fill either the height, width or both. What I find however is that if I take off the explicit width/height and try and use something like VerticalAlignment="Stretch" then I get a control of size 0... What am I doing wrong?
然后，我希望调整 XAML 中定义的此控件的子组件的大小，以填充高度、宽度或两者。然而，我发现的是，如果我去掉显式的宽度/高度并尝试使用 VerticalAlignment="Stretch" 之类的东西，那么我就可以控制大小 0 ......我做错了什么？
<rb:RateBase x:Class="RateBar.RateGraph"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:rb="clr-namespace:RateBar"
xmlns:sd="clr-namespace:System.Windows.Data"
mc:Ignorable="d">
<RangeBase.Resources>
<rb:JScriptConverter x:Key="JScript" TrapExceptions="False"/>
<ControlTemplate x:Key="rateGraphTemplate" TargetType="{x:Type rb:RateBase}">
<Canvas HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<rb:Axis Width="320" Height="88"/>
<Rectangle Height="88" Fill="#9690EE90" x:Name="progress">
<Rectangle.Width>
<MultiBinding Converter="{StaticResource JScript}" ConverterParameter="values[0]/values[1]*values[2]">
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Value"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Maximum"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Width"/>
</MultiBinding>
</Rectangle.Width>
</Rectangle>
<Polygon Fill="#FF06B025" x:Name="graph" />
<Label Canvas.Left="0" Width="380" HorizontalContentAlignment="Right" Foreground="Black" Content="{Binding Path=Caption, RelativeSource={RelativeSource TemplatedParent}}">
<Canvas.Bottom>
<MultiBinding Converter="{StaticResource JScript}" ConverterParameter="(values[2]*0.8)/values[1]*values[0]">
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Rate"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="RateMaximum"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Height"/>
</MultiBinding>
</Canvas.Bottom>
</Label>
<Line X1="0" X2="380" Stroke="Black">
<Canvas.Bottom>
<MultiBinding Converter="{StaticResource JScript}" ConverterParameter="(values[2]*0.8)/values[1]*values[0]">
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Rate"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="RateMaximum"/>
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Height"/>
</MultiBinding>
</Canvas.Bottom>
</Line>
</Canvas>
</ControlTemplate>
</RangeBase.Resources>
</rb:RateBase>
回答by Ross
The Widthand Heightproperties are primarily designed for setting requesteddimensions.
的Width和Height特性的设计主要是用于设定请求的尺寸。
If you are using dynamic layouts with stretching, etc. bind to the ActualWidthand ActualHeightproperties:
如果您使用具有拉伸等功能的动态布局，请绑定到ActualWidth和ActualHeight属性：
<Binding RelativeSource="{RelativeSource ...}" Path="ActualWidth"/>
回答by Mike Casa
I was trying to do something similar, found this to work well:
我试图做类似的事情，发现这很好用：
Width="{Binding RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type ListBox}},Path=ActualWidth}"
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