/// <summary>
/// Adjust the scrollbar of the panel on html element by the given id.<br/>
/// The top of the html element rectangle will be at the top of the panel, if there
/// is not enough height to scroll to the top the scroll will be at maximum.<br/>
/// </summary>
/// <param name="elementId">the id of the element to scroll to</param>
public virtual void ScrollToElement(string elementId)
{
ArgChecker.AssertArgNotNullOrEmpty(elementId, "elementId");
if (_htmlContainer != null)
{
var rect = _htmlContainer.GetElementRectangle(elementId);
if (rect.HasValue)
{
UpdateScroll(Point.Round(rect.Value.Location));
_htmlContainer.HandleMouseMove(this, new MouseEventArgs(MouseButtons, 0, MousePosition.X, MousePosition.Y, 0));
}
}
}
/// <summary>
/// Handle mouse move to handle hover cursor and text selection.
/// </summary>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (_htmlContainer != null)
{
_htmlContainer.HandleMouseMove(this, e);
}
}
/// <summary>
/// Raised on link handling timer tick, used for:
/// 1. Know when the tooltip is hidden by checking the visibility of the tooltip window.
/// 2. Call HandleMouseMove so the mouse cursor will react if over a link element.
/// 3. Call HandleMouseDown and HandleMouseUp to simulate click on a link if one was clicked.
/// </summary>
protected virtual void OnLinkHandlingTimerTick(EventArgs e)
{
try
{
var handle = _tooltipHandle;
if (handle != IntPtr.Zero && Win32Utils.IsWindowVisible(handle))
{
var mPos = Control.MousePosition;
var mButtons = Control.MouseButtons;
var rect = Win32Utils.GetWindowRectangle(handle);
if (rect.Contains(mPos))
{
_htmlContainer.HandleMouseMove(_associatedControl, new MouseEventArgs(mButtons, 0, mPos.X - rect.X, mPos.Y - rect.Y, 0));
}
}
else
{
_linkHandlingTimer.Stop();
_tooltipHandle = IntPtr.Zero;
var mPos = Control.MousePosition;
var mButtons = Control.MouseButtons;
var rect = Win32Utils.GetWindowRectangle(handle);
if (rect.Contains(mPos))
{
if (mButtons == MouseButtons.Left)
{
var args = new MouseEventArgs(mButtons, 1, mPos.X - rect.X, mPos.Y - rect.Y, 0);
_htmlContainer.HandleMouseDown(_associatedControl, args);
_htmlContainer.HandleMouseUp(_associatedControl, args);
}
}
}
}
catch (Exception ex)
{
OnRenderError(this, new HtmlRenderErrorEventArgs(HtmlRenderErrorType.General, "Error in link handling for tooltip", ex));
}
}