我使用以下方法创建了ScatterSeries图表：
public ScatterPlot()
{
InitializeComponent();
ScatterSeries a = new ScatterSeries();
a.Title = "Series A";
a.IndependentValuePath = "Key";
a.DependentValuePath = "Value";
scatterplot.Series.Add(a);
((ScatterSeries)scatterplot.Series[0]).ItemsSource = new KeyValuePair<DateTime, int>[]
{
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(1), 0),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(2), 150),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(3), 150),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(4), 0),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(5), 0),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(8), 130),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(9), 130),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(10), 0),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(11), 0),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(15), 225),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(16), 225),
new KeyValuePair<DateTime, int>(DateTime.Now.AddMonths(17), 0)
};
}
我有一个字典，每个数据点都映射到一个单独的文本标签。我想知道是否有可能建立一个绑定，当我将鼠标移动到一个点上时，我得到文本标签而不是实际数字？有关如何做到这一点的任何建议吗？
答案 0 :(得分：3)
设置DataPoint样式...
<charting:ScatterSeries DependentValuePath="Value"
IndependentValuePath="Key">
<charting:DataPointSeries.DataPointStyle>
<Style TargetType="{x:Type charting:DataPoint}">
<EventSetter Event="MouseEnter" Handler="DataPoint_MouseEnter" />
<!--Style.Triggers>
<Trigger Property="IsMouseDirectlyOver" Value="True">
<Setter Property="ToolTip" Value="Hi There!"/>
</Trigger>
</Style.Triggers--> <!-- This doesnt work!-->
</Style>
</charting:DataPointSeries.DataPointStyle>
<charting:DataPointSeries.ItemsSource>
<Binding BindsDirectlyToSource="True"/>
</charting:DataPointSeries.ItemsSource>
</charting:ScatterSeries>
但是当我测试时，基于触发器的工具提示设置器没有工作。事件设定者虽然工作。因此，最快的修复方法是使用该事件设置器并在处理程序中设置代码后面的TooltipService.ToolTip。
但是如果您使用MVVM，那么您可以使用一些附加行为来处理此事件并明确设置工具提示。
OR
您可以使用上面的样式覆盖ScatterDataPoint模板，只需将模板设置为此NewTemplate ...
请注意，在ControlTemplate下方，我已将ToolTipService.ToolTip设置为DataPoint的工具提示。因此，您必须使用上述样式设置Template和ToolTip ......
<!-- charting:ScatterDataPoint -->
<Style x:Key="NewTemplate" TargetType="charting:ScatterDataPoint">
<Setter Property="Background" Value="Orange" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="BorderBrush" Value="#FF686868" />
<Setter Property="Width" Value="8" />
<Setter Property="Height" Value="8" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="charting:ScatterDataPoint">
<Grid x:Name="Root" Opacity="0">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Normal" />
<VisualState x:Name="MouseOver">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="MouseOverHighlight" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.3" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="SelectionHighlight" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="0.185" />
</DoubleAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="SelectionHighlight" Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)">
<SplineColorKeyFrame KeyTime="00:00:00" Value="#FF8A8A8A" />
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="RevealStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.5" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Shown">
<Storyboard>
<DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Duration="00:00:00.0010000" Storyboard.TargetName="Root" Storyboard.TargetProperty="(UIElement.Opacity)">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="1" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Hidden">
<Storyboard>
<DoubleAnimation Duration="0" Storyboard.TargetName="Root" Storyboard.TargetProperty="Opacity" To="0" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ToolTipService.ToolTip>
<ContentControl Content="{TemplateBinding ToolTip}" />
</ToolTipService.ToolTip>
<Path Fill="{TemplateBinding Background}" Stroke="{TemplateBinding BorderBrush}" Stretch="Fill" StrokeThickness="1" StrokeLineJoin="Round" Data="F1 M 0,50L 50,0 100,50 50,100L 0,50 Z " />
<Path x:Name="MouseOverHighlight" Stretch="Fill" StrokeThickness="1" StrokeLineJoin="Round" Stroke="{x:Null}" Data="F1 M 0,50L 50,0 100,50 50,100L 0,50 Z " Opacity="0" Fill="#FFFFFFFF" />
<Path x:Name="SelectionHighlight" Stretch="Fill" StrokeThickness="1" StrokeLineJoin="Round" Stroke="{x:Null}" Data="F1 M 0,50L 50,0 100,50 50,100L 0,50 Z " Fill="#FF959595" Opacity="0" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>