/// <summary>
/// Clips the <paramref name="rect"/> to the <paramref name="container"/>.
/// </summary>
/// <param name="rect">The <see cref="RadRect"/> to be clipped.</param>
/// <param name="container">The container.</param>
/// <param name="borderOverflow">The border (stroke thickness) of the <paramref name="rect"/>.</param>
/// <param name="dashPatternLength">The length of the dash pattern of the <see cref="RadRect"/> stroke.</param>
/// <returns>The clipped rectangle.</returns>
internal static RadRect ClipRectangle(RadRect rect, RadRect container, double borderOverflow, double dashPatternLength)
{
// extend the container with the element border
container.X -= borderOverflow;
container.Y -= borderOverflow;
container.Width += 2 * borderOverflow;
container.Height += 2 * borderOverflow;
if (!rect.IntersectsWith(container))
{
return(RadRect.Empty);
}
// calculate the clipped rectangle, extended with the element border
double xFrom = RadMath.CoerceValue(rect.X, container.X, container.Right);
double yFrom = RadMath.CoerceValue(rect.Y, container.Y, container.Bottom);
double xTo = RadMath.CoerceValue(rect.Right, container.X, container.Right);
double yTo = RadMath.CoerceValue(rect.Bottom, container.Y, container.Bottom);
if (dashPatternLength == 0 || double.IsNaN(dashPatternLength) || double.IsInfinity(dashPatternLength))
{
dashPatternLength = 1;
}
// first check if "To" values are clipped, and if so, add the additional space needed by the dash array to be rendered correctly
if (rect.Right != xTo)
{
xTo += (rect.Right - xTo) % dashPatternLength;
}
if (rect.Bottom != yTo)
{
yTo += (rect.Bottom - yTo) % dashPatternLength;
}
// check if "From" values are clipped, and if so, add the additional space needed by the dash array to be rendered correctly and change the rect coordinates
if (rect.X != xFrom)
{
xFrom -= (xFrom - rect.X) % dashPatternLength;
rect.X = xFrom;
}
if (rect.Y != yFrom)
{
yFrom -= (yFrom - rect.Y) % dashPatternLength;
rect.Y = yFrom;
}
rect.Width = xTo - xFrom;
rect.Height = yTo - yFrom;
return(rect);
}
internal override void UpdateVisibility()
{
RadRect plotAreaLayoutSlot = this.chart.chartArea.plotArea.layoutSlot;
// point is laid-out outside the clip area, skip it from visualization
if (plotAreaLayoutSlot.IntersectsWith(this.Model.layoutSlot))
{
this.SetPresenterVisibility(Visibility.Visible);
}
else
{
this.SetPresenterVisibility(Visibility.Collapsed);
}
}
public void Test_InterceptsWith()
{
RadRect rect1 = new RadRect(10, 10, 20, 20);
Assert.IsTrue(rect1.IntersectsWith(rect1));
RadRect rect2 = new RadRect(15, 15, 20, 20);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 5, 20, 20);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 15, 10, 10);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 5, 40, 40);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(5, 5, 40, 40);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(5, 15, 40, 40);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 15, 10, 10);
Assert.IsTrue(rect1.IntersectsWith(rect2));
Assert.IsTrue(rect2.IntersectsWith(rect1));
rect2 = new RadRect(5, 5, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 5, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(5, 15, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(5, 35, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(15, 35, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(35, 5, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(35, 15, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
rect2 = new RadRect(35, 35, 4, 4);
Assert.IsFalse(rect1.IntersectsWith(rect2));
Assert.IsFalse(rect2.IntersectsWith(rect1));
}
