private static void OffsetPropertyMetadataChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
ArrowTip element = sender as ArrowTip;
element.LayoutArrow();
}
private void ArrangePopup()
{
if (((this.m_popup != null) && (this.m_targetElement != null)) && this.m_popup.IsOpen)
{
if ((m_popup.Child as ArrowTip).Content == null)
{
object obj = this.Content;
this.Content = null;
(m_popup.Child as ArrowTip).Content = obj;
}
m_popup.UpdateLayout();
ArrowTip tip = (m_popup.Child as ArrowTip);
UserControl rootVisual = Application.Current.RootVisual as UserControl;
double actualWidth = rootVisual.ActualWidth;
double actualHeight = rootVisual.ActualHeight;
double targetWidth = this.m_targetElement.ActualWidth;
double targetHeight = this.m_targetElement.ActualHeight;
if (((actualHeight != 0.0) && (actualWidth != 0.0)) && ((targetWidth != 0.0) && (targetHeight != 0.0)))
{
GeneralTransform transform = null;
try
{
transform = this.m_targetElement.TransformToVisual(rootVisual);
}
catch
{
//Don't need to do nothing.
}
if (transform != null)
{
Point point = new Point(0.0, 0.0);
Point position = transform.Transform(point);
if (Orientation == TooltipOrientation.LeftOrRight)
{
bool isLeft = false;
if (position.X + tip.ActualWidth + targetWidth > actualWidth)
{
isLeft = true;
}
//左
if (isLeft)
{
tip.Orientation = ArrowTipOrientation.Right;
m_popup.HorizontalOffset = position.X - tip.ActualWidth;
m_popup.VerticalOffset = position.Y - targetHeight;
tip.Offset = targetHeight;
}
else//右
{
tip.Orientation = ArrowTipOrientation.Left;
m_popup.HorizontalOffset = position.X + targetWidth;
m_popup.VerticalOffset = position.Y - targetHeight;
tip.Offset = targetHeight;
}
if (actualHeight <= position.Y + tip.ActualHeight)
{
m_popup.VerticalOffset = actualHeight - tip.ActualHeight;
tip.Offset = position.Y - m_popup.VerticalOffset;
}
else if (position.Y - tip.ActualHeight < 0)
{
m_popup.VerticalOffset = 0;
tip.Offset = position.Y;
}
}
else
{
bool isTop = false;
if (position.Y + tip.ActualHeight + targetHeight > actualHeight)
{
isTop = true;
}
//左
if (isTop)
{
tip.Orientation = ArrowTipOrientation.Bottom;
m_popup.VerticalOffset = position.Y - tip.ActualHeight;
m_popup.HorizontalOffset = position.X;
tip.Offset = targetWidth / 2;
}
else//右
{
tip.Orientation = ArrowTipOrientation.Top;
m_popup.VerticalOffset = position.Y + targetHeight;
m_popup.HorizontalOffset = position.X;
tip.Offset = targetWidth / 2;
}
if (actualWidth <= position.X + tip.ActualWidth)
{
m_popup.HorizontalOffset = actualWidth - tip.ActualWidth;
tip.Offset = position.X - m_popup.HorizontalOffset;
}
else if (position.X - tip.ActualWidth < 0)
{
m_popup.HorizontalOffset = 0;
tip.Offset = position.X;
}
}
}
}
}
}
