Bind a Path Stroke color to Foreground - silverlight-4.0

Question

Using the TabControl element for Silverlight in Blend I created the following markup:
<controls:TabControl>
<controls:TabItem Header="TabItem" Style="{StaticResource TabItemStyle1}" />
<controls:TabItem Style="{StaticResource TabItemStyle1}">
<controls:TabItem.Header>
<StackPanel Orientation="Horizontal">
<Path Data="M0,14L0,6 5,0 10,6 10,14 0,6 10,6 0,14 10,14"
StrokeLineJoin="Round" Margin="0 0 6 0"
Stroke="Black"/>
<TextBlock Text="TabItem"/>
</StackPanel>
</controls:TabItem.Header>
</controls:TabItem>
</controls:TabControl>
TabItemStyle1 is a copy of the default style of a TabItem.
I altered TabItemStyle1 by adding a color animation in the MouseOver storyboard so that unselected tab items become red when the mouse hovers them:
<ColorAnimation BeginTime="0" Duration="00:00:00.001"
Storyboard.TargetName="HeaderTopUnselected"
Storyboard.TargetProperty="(UIElement.Foreground).(SolidColorBrush.Color)"
To="Red" />
Now when I hover the second tab, the text becomes red but the Path remains black:
How should I define the Path Stroke color to make it follow the same rule?

Answer 1

The following should work:
<controls:TabControl>
<controls:TabItem Header="TabItem" Style="{StaticResource TabItemStyle1}" />
<controls:TabItem Style="{StaticResource TabItemStyle1}">
<controls:TabItem.Header>
<StackPanel Orientation="Horizontal">
<Path Data="M0,14L0,6 5,0 10,6 10,14 0,6 10,6 0,14 10,14"
StrokeLineJoin="Round" Margin="0 0 6 0"
Stroke="{Binding ElementName=textBlock, Path=Foreground}"/>
<TextBlock x:Name="textBlock" Text="TabItem"/>
</StackPanel>
</controls:TabItem.Header>
</controls:TabItem>
</controls:TabControl>

Answer 2

it's not a perfect solution but you could use this
<sdk:TabControl>
<sdk:TabItem Header="item1"></sdk:TabItem>
<sdk:TabItem Foreground="Red" x:Name="someNameForTheTab">
<sdk:TabItem.Header>
<StackPanel Orientation="Horizontal">
<!--Just set stroke binding to the foreground of the tabItem-->
<Path Stroke="{Binding Foreground, ElementName=someNameForTheTab}" Data="M0,14L0,6 5,0 10,6 10,14 0,6 10,6 0,14 10,14"
StrokeLineJoin="Round" Margin="0 0 6 0"/>
<TextBlock Text="item2"/>
</StackPanel>
</sdk:TabItem.Header>
</sdk:TabItem>
</sdk:TabControl>

Answer 3

Try binding to the TemplatedParent like this:
<Path
Data="M0,14L0,6 5,0 10,6 10,14 0,6 10,6 0,14 10,14"
StrokeLineJoin="Round"
Margin="0 0 6 0"
Stroke="{Binding Foreground, RelativeSource={RelativeSource TemplatedParent}}"/>
I haven't tested this, but give it a whirl and let me know. If it doesn't work, try this:
<Path Data="M0,14L0,6 5,0 10,6 10,14 0,6 10,6 0,14 10,14" StrokeLineJoin="Round" Margin="0 0 6 0">
<Path.Stroke>
<SolidColorBrush Color="{Binding Foreground.Color, RelativeSource={RelativeSource TemplatedParent}}" />
</Path.Stroke>
</Path>
I have a feeling that the Color property needs to be the source of binding, not the actual brush.

Answer 4

I made it work by binding the header content brushes to {TemplateBinding TextElement.Foreground}.
In other cases I used standard property binding with converters, for example if I had to adapt element's brushes to item state.

Answer 5

// animazione periferica
public static void LineAnimation(Line _line,String _colore)
{
Storyboard result = new Storyboard();
Duration duration = new Duration(TimeSpan.FromSeconds(2));
ColorAnimation animation = new ColorAnimation();
animation.RepeatBehavior = RepeatBehavior.Forever;
animation.Duration = duration;
switch (_colore.ToUpper())
{
case "RED":
animation.From = Colors.Red;
break;
case "ORANGE":
animation.From = Colors.Orange;
break;
case "YELLOW":
animation.From = Colors.Yellow;
break;
case "GRAY":
animation.From = Colors.DarkGray;
break;
default:
animation.From = Colors.Green;
break;
}
animation.To = Colors.Gray;
Storyboard.SetTarget(animation, _line);
Storyboard.SetTargetProperty(animation, new PropertyPath("(Line.Stroke).(SolidColorBrush.Color)"));
result.Children.Add(animation);
result.Begin();
}
}
//**********************************************
public partial class MainPage : UserControl
{
public Line _line;
public MainPage()
{
InitializeComponent();
Canvas.MouseLeftButtonDown += Canvas_MouseLeftButtonDown;
Canvas.MouseLeftButtonUp += Canvas_MouseLeftButtonUp;
}
void Canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
_line.X2 = e.GetPosition(this.Canvas).X;
_line.Y2 = e.GetPosition(this.Canvas).Y;
_line.Loaded += _line_Loaded;
Canvas.Children.Add(_line);
}
void _line_Loaded(object sender, RoutedEventArgs e)
{
Cls_Barriere.LineAnimation(sender as Line, "RED");
}
void Canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
_line = new Line();
_line.Stroke = new SolidColorBrush(Colors.White);
_line.StrokeThickness = 5;
_line.StrokeStartLineCap = PenLineCap.Round;
_line.StrokeEndLineCap = PenLineCap.Round;
_line.StrokeDashCap = PenLineCap.Round;
_line.X1 = e.GetPosition(this.Canvas).X;
_line.Y1= e.GetPosition(this.Canvas).Y;
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
}
}