在我的MainWindow中,我定义了一个区域,我正在将我的UserControls注入(使用Prism,但这没关系)。我的控制应该是可调整大小(它完美地工作)和可移动的。要拖动和移动我的用户控件,我使用的是Blend的MouseDragElementBehavior。问题是,虽然我的控制移动,但当我调整MainWindow的大小时,它会被切断:
当我没有移动我的控件时,一切正常,当我调整MainWindow时,滚动条显示为:
但是当我将我的用户控件移动到MainWindow的底部时,ScrollBar没有显示出来,就像它不知道我的控件已被移动:
重要提示:ScrollBar在两种情况下都会在同一时间出现,但是当我向下移动用户控件时,当我到达用户控件的边界时,它应该显得多得多。在下面的图片中,您可以看到在我向下控制控制器后ScrollBar出现的那一刻。它似乎为时已晚,控制权被削减。
很难解释,如果你理解我,请告诉我。
我的代码:
<Window x:Class="ViewInjection.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
Title="MainWindow">
<ScrollViewer HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition Height="*" ScrollViewer.CanContentScroll="True" ScrollViewer.IsDeferredScrollingEnabled="True"/>
</Grid.RowDefinitions>
<Button Grid.Row="0" Click="Button_Click">Add View</Button>
<ItemsControl Grid.Row="1" prism:RegionManager.RegionName="ContentRegion" >
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
</Grid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Grid>
</ScrollViewer>
</Window>
用户控件:
<UserControl
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:local="clr-namespace:ViewInjection.Views"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" x:Class="ViewInjection.Views.ViewA"
mc:Ignorable="d">
<Border x:Name="Border" HorizontalAlignment="Center" VerticalAlignment="Center" BorderBrush="#FF626161" BorderThickness="2" CornerRadius="3" MinHeight="200" MinWidth="200">
<i:Interaction.Behaviors>
<ei:MouseDragElementBehavior ConstrainToParentBounds="true"/>
</i:Interaction.Behaviors>
<DockPanel x:Name="sizableContent" Background="LightGray" Focusable="False" LastChildFill="True" MinHeight="300" MinWidth="300">
<DockPanel DockPanel.Dock="Bottom" >
<!--Make user control resizeable-->
<Thumb DockPanel.Dock="Right" VerticalAlignment="Bottom" Margin="0,0,1,1"
DragDelta="OnResizeThumbDragDelta"
DragStarted="OnResizeThumbDragStarted"
DragCompleted="OnResizeThumbDragCompleted">
<Thumb.Style>
<Style TargetType="{x:Type Thumb}">
<Style.Setters>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid x:Name="resizeVisual" DockPanel.Dock="Right" VerticalAlignment="Bottom" >
<Line X1="6" Y1="18" X2="18" Y2="6" Stroke="DarkGray" StrokeThickness="1.5"/>
<Line X1="10" Y1="18" X2="18" Y2="10" Stroke="DarkGray" StrokeThickness="1.5"/>
<Line X1="14" Y1="18" X2="18" Y2="14" Stroke="DarkGray" StrokeThickness="1.5"/>
<Grid.Style>
<Style TargetType="{x:Type Grid}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Cursor" Value="SizeNWSE"/>
</Trigger>
</Style.Triggers>
</Style>
</Grid.Style>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style.Setters>
</Style>
</Thumb.Style>
</Thumb>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch">
<Button Margin="12" Width="75" TabIndex="1" Content="Ok"/>
</StackPanel>
</DockPanel>
<StackPanel HorizontalAlignment="Center" Margin="16,16,16,4">
<TextBlock Text="My UserControl"/>
</StackPanel>
</DockPanel>
</Border>
</UserControl>
P.S。
我正在使用item控件在该区域内拥有多个控件。我使用Grid作为模板,因为我希望控件相互重叠。