获取自定义工具提示使用WPF图表？ [英] Getting a custom tooltip with a WPF Chart?
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问题描述
我创建了一个ScatterSeries使用如下图：
I created a ScatterSeries chart using the following:
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)
};
}
我有其中的每个数据点被映射到一个字典独立的文本标签。我不知道是否有可能建立一个绑定，这样，当我移动我的鼠标悬停在某个点上，我得到的文本标签，而不是实际的数量？如何做到这一点有什么建议？
I have a dictionary where every data point is mapped to a separate text label. I was wondering if it is possible to establish a binding such that when I move my mouse over a point, I get the text label instead of the actual number? Any suggestions on how to do this?
推荐答案
将数据点风格...
<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>
但基于触发器提示二传手没有工作时，我测试。本次活动虽然二传手工作。因此，最快的修复可以使用该事件setter和从代码中的处理程序设置 TooltipService.ToolTip 后面。
但是，如果你正在使用MVVM，那么你可以使用一些附加的行为来处理这一事件，并明确设置提示。
But if you are using MVVM then you could use some attached behavior to handle this event and set the tooltip explicitly.
或
您可以用上面的样式，只是设置模板，这个<覆盖 ScatterDataPoint 模板code> NewTemplate ...
You could override the ScatterDataPoint template using the above Style and just set template to this NewTemplate ...
请注意，在控件模板下面我已经设置了 ToolTipService.ToolTip 来的数据点的提示。所以，你将不得不使用上面的样式设置模板和工具提示 的 ...
Notice that in the ControlTemplate below I have set the ToolTipService.ToolTip to the Tooltip of the DataPoint. So you will have to use the above style to set the Template and the 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>
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