/// <summary>
/// Overridden to take the connection lines to the label into account.
/// </summary>
/// <remarks>
/// Otherwise label intersection lines might not be painted if the node is outside
/// of the clipping bounds.
/// </remarks>
protected override bool IsVisible(ICanvasContext context, RectD rectangle, INode node)
{
if (base.IsVisible(context, rectangle, node))
{
return(true);
}
// check for labels connection lines
rectangle = rectangle.GetEnlarged(10);
return(node.Labels.Any(label => rectangle.IntersectsLine(node.Layout.GetCenter(), label.GetLayout().GetCenter())));
}
////////////////////////////////////////////////////
//////////////// New in this sample ////////////////
////////////////////////////////////////////////////
/// <summary>
/// Overridden to take the connection lines to the label into account.
/// </summary>
/// <remarks>
/// Otherwise label intersection lines might not be painted if the node is outside
/// of the clipping bounds.
/// </remarks>
protected override bool IsVisible(ICanvasContext context, RectD rectangle, INode node)
{
// return base.IsVisible(node, clip, canvasContext);
if (base.IsVisible(context, rectangle, node))
{
return(true);
}
// check for labels connection lines
rectangle = rectangle.GetEnlarged(10);
foreach (var label in node.Labels)
{
if (rectangle.IntersectsLine(node.Layout.GetCenter(), label.GetLayout().GetCenter()))
{
return(true);
}
}
return(false);
}
protected override bool IsVisible(ICanvasContext context, RectD rectangle, INode node)
{
// first check if the wrapped style is visible
if (wrapped.Renderer.GetVisibilityTestable(node, wrapped).IsVisible(context, rectangle))
{
return(true);
}
// if not, check for labels connection lines
rectangle = rectangle.GetEnlarged(10);
foreach (var label in node.Labels)
{
if (rectangle.IntersectsLine(node.Layout.GetCenter(), label.GetLayout().GetCenter()))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Overridden to take the connection lines to the label into account.
/// </summary>
/// <remarks>
/// Otherwise label intersection lines might not be painted if the node is outside
/// of the clipping bounds.
/// </remarks>
protected override bool IsVisible(ICanvasContext context, RectD rectangle, INode node)
{
// uncomment the following line to watch the default behaviour that
// doesn't paint the label edge if the node lies completely outside the viewport
// return base.IsVisible(context, rectangle, node);
if (base.IsVisible(context, rectangle, node))
{
return(true);
}
// check for labels connection lines
rectangle = rectangle.GetEnlarged(10);
foreach (var label in node.Labels)
{
if (rectangle.IntersectsLine(node.Layout.GetCenter(), label.GetLayout().GetCenter()))
{
return(true);
}
}
return(false);
}
// Returns the first AdditionalSnapLine found in a close surrounding of the given location
// or null if none can be found.
private AdditionalSnapLineVisualCreator TryGetAdditionalSnapLineAt(PointD location)
{
RectD surrounding = new RectD(location - new PointD(3, 3), new SizeD(6, 6));
return(window.AdditionalSnapLineVisualCreators.FirstOrDefault(line => surrounding.IntersectsLine(line.From, line.To)));
}