/// <summary>
/// On tooltip appear set the html by the associated control, layout and set the tooltip size by the html size.
/// </summary>
private void OnToolTipPopup(object sender, PopupEventArgs e)
{
//Create fragment container
string cssClass = string.IsNullOrEmpty(_tooltipCssClass)
? null
: string.Format(" class=\"{0}\"", _tooltipCssClass);
string toolipHtml = string.Format("<div{0}>{1}</div>", cssClass, GetToolTip(e.AssociatedControl));
_htmlContainer.SetHtml(toolipHtml, _baseCssData);
_htmlContainer.MaxSize = MaximumSize;
//Measure size of the container
using (Graphics g = e.AssociatedControl.CreateGraphics())
{
_htmlContainer.PerformLayout(g);
}
//Set the size of the tooltip
e.ToolTipSize = new Size((int)Math.Ceiling(_htmlContainer.ActualSize.Width),
(int)Math.Ceiling(_htmlContainer.ActualSize.Height));
// start mouse handle timer
if (_allowLinksHandling)
{
_associatedControl = e.AssociatedControl;
_linkHandlingTimer.Start();
}
}
/// <summary>
/// Perform html container layout by the current panel client size.
/// </summary>
private void PerformHtmlLayout()
{
if (_htmlContainer != null)
{
_htmlContainer.MaxSize = new SizeF(ClientSize.Width, 0);
using (Graphics g = CreateGraphics())
{
_htmlContainer.PerformLayout(g);
}
AutoScrollMinSize = Size.Round(_htmlContainer.ActualSize);
}
}
/// <summary>
/// Perform the layout of the html in the control.
/// </summary>
protected override void OnLayout(LayoutEventArgs levent)
{
if (_htmlContainer != null)
{
if (AutoSize)
{
_htmlContainer.MaxSize = SizeF.Empty;
}
else if (AutoSizeHeightOnly)
{
_htmlContainer.MaxSize = new SizeF(Width, 0);
}
else
{
_htmlContainer.MaxSize = Size;
}
using (Graphics g = CreateGraphics())
{
_htmlContainer.PerformLayout(g);
if (AutoSize || _autoSizeHight)
{
if (AutoSize)
{
Size = Size.Round(_htmlContainer.ActualSize);
if (MaximumSize.Width > 0 && MaximumSize.Width < _htmlContainer.ActualSize.Width)
{
// to allow the actual size be smaller than max we need to set max size only if it is really larger
_htmlContainer.MaxSize = MaximumSize;
_htmlContainer.PerformLayout(g);
Size = Size.Round(_htmlContainer.ActualSize);
}
else if (MinimumSize.Width > 0 && MinimumSize.Width > _htmlContainer.ActualSize.Width)
{
// if min size is larger than the actual we need to re-layout so all 100% layouts will be correct
_htmlContainer.MaxSize = new SizeF(MinimumSize.Width, 0);
_htmlContainer.PerformLayout(g);
Size = Size.Round(_htmlContainer.ActualSize);
}
}
else if (_autoSizeHight && Height != (int)_htmlContainer.ActualSize.Height)
{
int prevWidth = Width;
// make sure the height is not lower than min if given
Height = MinimumSize.Height > 0 && MinimumSize.Height > _htmlContainer.ActualSize.Height
? MinimumSize.Height
: (int)_htmlContainer.ActualSize.Height;
// handle if changing the height of the label affects the desired width and those require re-layout
if (prevWidth != Width)
{
OnLayout(levent);
}
}
}
}
}
base.OnLayout(levent);
}