void RepositionTip(PointerBorder pointer)
{
DataValue data = pointer.Data;
double availableHeight = this.ActualHeight;
double value = data.Y;
Point scaled = scaleTransform.Transform(new Point(data.X, data.Y));
scaled = zoomTransform.Transform(scaled);
double offset = Canvas.GetLeft(Graph);
double x = scaled.X + offset;
double y = availableHeight - scaled.Y;
double tipPositionX = x;
if (tipPositionX + PointerBorder.ActualWidth > this.ActualWidth)
{
tipPositionX = this.ActualWidth - PointerBorder.ActualWidth;
}
double tipPositionY = y - PointerLabel.ActualHeight - 4;
if (tipPositionY < 0)
{
tipPositionY = 0;
}
pointer.Margin = new Thickness(tipPositionX, tipPositionY, 0, 0);
pointer.Pointer.RenderTransform = new TranslateTransform(x, y);
}
void ShowTip(string label, Point pos, DataValue data = null)
{
PointerLabel.Text = label;
PointerBorder.UpdateLayout();
double offset = Canvas.GetLeft(Graph);
double tipPositionX = pos.X;// + offset;
if (tipPositionX + PointerBorder.ActualWidth > this.ActualWidth)
{
tipPositionX = this.ActualWidth - PointerBorder.ActualWidth;
}
double tipPositionY = pos.Y - PointerLabel.ActualHeight - 4;
if (tipPositionY < 0)
{
tipPositionY = 0;
}
PointerBorder.Margin = new Thickness(tipPositionX, tipPositionY, 0, 0);
PointerBorder.Visibility = System.Windows.Visibility.Visible;
PointerBorder.Data = data;
Point pointerPosition = pos;
Pointer.RenderTransform = new TranslateTransform(pointerPosition.X, pointerPosition.Y);
Pointer.Visibility = System.Windows.Visibility.Visible;
LockTooltipMenuItem.IsEnabled = true;
}
private void RepositionTips()
{
foreach (UIElement child in AdornerCanvas.Children)
{
PointerBorder pointer = child as PointerBorder;
if (pointer != null)
{
RepositionTip(pointer);
}
}
}
void ShowTip(string label, Point pos, DataValue data = null)
{
PointerLabel.Text = label;
PointerBorder.UpdateLayout();
double tipPositionX = pos.X;
if (tipPositionX + PointerBorder.ActualWidth > this.ActualWidth)
{
tipPositionX = this.ActualWidth - PointerBorder.ActualWidth;
}
double tipPositionY = pos.Y - PointerLabel.ActualHeight - 4;
if (tipPositionY < 0)
{
tipPositionY = 0;
}
Size closeBoxSize = CloseBox.DesiredSize;
if (tipPositionX == this.ActualWidth - PointerBorder.ActualWidth && tipPositionY < closeBoxSize.Height)
{
tipPositionX -= closeBoxSize.Width;
}
PointerBorder.Margin = new Thickness(tipPositionX, tipPositionY, 0, 0);
PointerBorder.Visibility = System.Windows.Visibility.Visible;
PointerBorder.Data = data;
Point pointerPosition = pos;
Pointer.RenderTransform = new TranslateTransform(pointerPosition.X, pointerPosition.Y);
Pointer.Visibility = System.Windows.Visibility.Visible;
LockTooltipMenuItem.IsEnabled = true;
if (PointerMoved != null)
{
PointerMoved(this, data);
}
}
private void OnLockTooltip(object sender, RoutedEventArgs e)
{
// we lock the tooltip by cloning the existing tooltip objects.
/*
* <Path x:Name="Pointer" Fill="{StaticResource TooltipForeground}" Data="M0,-5 L 5,0 0,5 -5 0z" Visibility="Collapsed"/>
* <Border x:Name="PointerBorder" Visibility="Collapsed" Padding="2" HorizontalAlignment="Left" VerticalAlignment="Top" BorderThickness="1"
* CornerRadius="3" BorderBrush="{StaticResource TooltipForeground}" Background="#80303030">
* <TextBlock x:Name="PointerLabel" Foreground="{StaticResource TooltipForeground}"/>
* </Border>
*/
Path ptr = new Path()
{
Fill = Pointer.Fill,
Data = Pointer.Data.Clone(),
RenderTransform = Pointer.RenderTransform.Clone()
};
AdornerCanvas.Children.Add(ptr);
PointerBorder ptrBorder = new PointerBorder()
{
Padding = PointerBorder.Padding,
HorizontalAlignment = PointerBorder.HorizontalAlignment,
VerticalAlignment = PointerBorder.VerticalAlignment,
BorderThickness = PointerBorder.BorderThickness,
CornerRadius = PointerBorder.CornerRadius,
BorderBrush = PointerBorder.BorderBrush,
Background = PointerBorder.Background,
Margin = PointerBorder.Margin,
Data = PointerBorder.Data,
Pointer = ptr,
};
ptrBorder.Child = new TextBlock()
{
Foreground = PointerLabel.Foreground, Text = PointerLabel.Text
};
AdornerCanvas.Children.Add(ptrBorder);
}
void RepositionTip(PointerBorder pointer)
{
DataValue data = pointer.Data;
Point pt = GetScaledValue(data);
double offset = Canvas.GetLeft(Graph);
double x = pt.X + offset;
double y = pt.Y;
double tipPositionX = x;
if (tipPositionX + PointerBorder.ActualWidth > this.ActualWidth)
{
tipPositionX = this.ActualWidth - PointerBorder.ActualWidth;
}
double tipPositionY = y - PointerLabel.ActualHeight - 4;
if (tipPositionY < 0)
{
tipPositionY = 0;
}
pointer.Margin = new Thickness(tipPositionX, tipPositionY, 0, 0);
pointer.Pointer.RenderTransform = new TranslateTransform(x, y);
}