private static void IsOpen_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ToolTip toolTip = (ToolTip)d;
if (e.NewValue is bool)
{
bool isOpen = (bool)e.NewValue;
if (isOpen)
{
bool wasPopupAlreadyOpen = (toolTip._parentPopup != null && toolTip._parentPopup.IsOpen == true);
if (!wasPopupAlreadyOpen) // Note: this prevents loops due to the fact that when the popup opens, the "ToolTip.IsOpen_Changed" method is called because the tooltip is the child of the Popup so its properties are called when it is loaded into the Visual Tree.
{
// Propagate the DataContext:
if (toolTip.INTERNAL_ElementToWhichThisToolTipIsAssigned is FrameworkElement)
{
toolTip.DataContext = ((FrameworkElement)toolTip.INTERNAL_ElementToWhichThisToolTipIsAssigned).DataContext;
}
// Make sure the tooltip is transparent to clicks:
toolTip.IsHitTestVisible = false;
// Make sure the tooltip is Top/Left-aligned:
toolTip.HorizontalAlignment = HorizontalAlignment.Left;
toolTip.VerticalAlignment = VerticalAlignment.Top;
// Create the popup if not already created:
if (toolTip._parentPopup == null)
{
toolTip._parentPopup = new Popup()
{
Child = toolTip,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
HorizontalContentAlignment = HorizontalAlignment.Left,
VerticalContentAlignment = VerticalAlignment.Top,
};
// Make sure that the popup is displayed in the same Window as the element to which the ToolTip is assigned. This is useful when there are multiple Windows:
if (toolTip.INTERNAL_ElementToWhichThisToolTipIsAssigned != null)
{
toolTip._parentPopup.INTERNAL_ParentWindow = toolTip.INTERNAL_ElementToWhichThisToolTipIsAssigned.INTERNAL_ParentWindow;
}
}
// Calculate the popup position:
Point popupAbsolutePosition;
if (toolTip._forceSpecifyAbsoluteCoordinates.HasValue)
{
popupAbsolutePosition = toolTip._forceSpecifyAbsoluteCoordinates.Value;
}
else
{
popupAbsolutePosition = INTERNAL_PopupsManager.CalculatePopupAbsolutePositionBasedOnElementPosition(
toolTip.INTERNAL_ElementToWhichThisToolTipIsAssigned,
toolTip.HorizontalOffset,
toolTip.VerticalOffset);
}
// Set the popup position:
toolTip._parentPopup.HorizontalOffset = popupAbsolutePosition.X;
toolTip._parentPopup.VerticalOffset = popupAbsolutePosition.Y;
// Ensure that the popup stays within the screen bounds if its content is big:
toolTip._parentPopup.Loaded -= toolTip._parentPopup_Loaded; // We unregister the event to ensure that it is not registered twice.
toolTip._parentPopup.Loaded += toolTip._parentPopup_Loaded;
// Open the popup:
toolTip._parentPopup.IsOpen = true;
//Start the timer to close the popup after 5 seconds:
toolTip._timerForClosingTooltipAfter5Seconds.Tick -= toolTip._timerForClosingTooltipAfter5Seconds_Tick;
toolTip._timerForClosingTooltipAfter5Seconds.Tick += toolTip._timerForClosingTooltipAfter5Seconds_Tick;
toolTip._timerForClosingTooltipAfter5Seconds.Start();
// Raise the "Opened" event:
if (toolTip.Opened != null)
{
toolTip.Opened(toolTip, new RoutedEventArgs());
}
}
}
else
{
toolTip._timerForClosingTooltipAfter5Seconds.Stop();
if (toolTip._parentPopup != null &&
toolTip._parentPopup.IsOpen == true)
{
toolTip._parentPopup.IsOpen = false;
// Raise the "Closed" event:
if (toolTip.Closed != null)
{
toolTip.Closed(toolTip, new RoutedEventArgs());
}
}
}
}
}
private static void IsOpen_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ToolTip toolTip = (ToolTip)d;
bool isOpen = (bool)e.NewValue;
if (isOpen)
{
bool wasPopupAlreadyOpen = (toolTip._parentPopup != null && toolTip._parentPopup.IsOpen == true);
// Note: this prevents loops due to the fact that when the popup opens, the "ToolTip.IsOpen_Changed" method is called
// because the tooltip is the child of the Popup so its properties are called when it is loaded into the Visual Tree.
if (wasPopupAlreadyOpen)
{
return;
}
// Make sure the tooltip is transparent to clicks:
toolTip.IsHitTestVisible = false;
// Make sure the tooltip is Top/Left-aligned:
toolTip.HorizontalAlignment = HorizontalAlignment.Left;
toolTip.VerticalAlignment = VerticalAlignment.Top;
// Create the popup if not already created:
if (toolTip._parentPopup == null)
{
toolTip._parentPopup = new Popup()
{
Child = toolTip,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
HorizontalContentAlignment = HorizontalAlignment.Left,
VerticalContentAlignment = VerticalAlignment.Top,
};
toolTip._parentPopup.DataContext = toolTip._owner?.DataContext;
toolTip._parentPopup.Loaded += new RoutedEventHandler(ParentPopupLoaded);
}
Point position = GetMousePosition();
position.X = Math.Max(position.X + toolTip.HorizontalOffset, 0.0) + 10.0;
position.Y = Math.Max(position.Y + toolTip.VerticalOffset, 0.0) + 10.0;
toolTip._parentPopup.HorizontalOffset = position.X;
toolTip._parentPopup.VerticalOffset = position.Y;
toolTip._parentPopup.IsOpen = true;
if (toolTip.Opened != null)
{
toolTip.Opened(toolTip, new RoutedEventArgs());
}
}
else
{
if (toolTip._parentPopup != null && toolTip._parentPopup.IsOpen == true)
{
toolTip._parentPopup.IsOpen = false;
// Raise the "Closed" event:
if (toolTip.Closed != null)
{
toolTip.Closed(toolTip, new RoutedEventArgs());
}
}
}
}
