我已经在按钮鼠标悬停上放置了一个弹出窗口.每当我将鼠标悬停在该按钮上时,我的自定义设计弹出窗口就会完美显示.但是它并没有完美地指向按钮.怎么这样..?
现在我的弹出窗口看起来像
我希望箭头标记指向帮助按钮如何实现它..
这是我在xaml中按钮和弹出窗口的代码
<telerik:RadButton Name="btnH" Grid.Column="1" HorizontalAlignment="Left" Margin="444,56,0,0" Grid.Row="2" VerticalAlignment="Top"
Width="23" Height="23" BorderThickness="6" BorderBrush="#4E4E4E">
<Image Source="Images/help.png" />
<telerik:RadButton.Triggers>
<EventTrigger RoutedEvent="MouseEnter">
<BeginStoryboard>
<Storyboard TargetName="TooltipPopup" TargetProperty="IsOpen">
<BooleanAnimationUsingKeyFrames FillBehavior="HoldEnd">
<DiscreteBooleanKeyFrame KeyTime="00:00:00" Value="True" />
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
以下是自定义usercontrol xaml,它在弹出窗口中调用
<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:telerik="http://schemas.telerik.com/2008/xaml/presentation" x:Class="WPFTest.UCToolTip"
mc:Ignorable="d" Height="231.493" Width="362.075"
Background="Transparent" >
<UserControl.Resources>
<Style TargetType="{x:Type Hyperlink}">
<Setter Property="TextBlock.TextDecorations" Value="{x:Null}" />
</Style>
</UserControl.Resources>
<Grid Margin="10,0,0,0">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Background="red" Margin="0,0,182,133">
</Grid>
<Polygon
Points="0.5,0 15,0, 0,30" Stroke="Orange" Fill="Orange" Margin="0,98,0,101" />
</Grid>
最佳答案 将此样式用于弹出窗口:
<Style TargetType="Popup">
<Style.Triggers>
<Trigger Property="IsOpen" Value="true">
<Setter Property="PlacementTarget" Value="{Binding ElementName=btnH }" />
<Setter Property="Placement" Value="Top" />
<Setter Property="VerticalOffset" Value="-5" />
<Setter Property="HorizontalOffset" Value="5" />
</Trigger>
</Style.Triggers>
</Style>