public static void LimitExtent(IViewport viewport, PanMode panMode, BoundingBox panLimits, BoundingBox mapEnvelope)
{
var maxExtent = panLimits ?? mapEnvelope;
if (maxExtent == null)
{
// Can be null because both panLimits and Map.Extent can be null.
// The Map.Extent can be null if the extent of all layers is null
return;
}
if (panMode == PanMode.KeepCenterWithinExtents)
{
if (viewport.Center.X < maxExtent.Left)
{
viewport.Center.X = maxExtent.Left;
}
if (viewport.Center.X > maxExtent.Right)
{
viewport.Center.X = maxExtent.Right;
}
if (viewport.Center.Y > maxExtent.Top)
{
viewport.Center.Y = maxExtent.Top;
}
if (viewport.Center.Y < maxExtent.Bottom)
{
viewport.Center.Y = maxExtent.Bottom;
}
}
else if (panMode == PanMode.KeepViewportWithinExtents)
{
if (MapWidthSpansViewport(maxExtent.Width, viewport.Width, viewport.Resolution)) // if it does't fit don't restrict
{
//if ((viewport.Extent.Left < maxExtent.Left) && (viewport.Extent.Right > maxExtent.Right))
// throw new Exception();
if (viewport.Extent.Left < maxExtent.Left)
{
viewport.Center.X += maxExtent.Left - viewport.Extent.Left;
}
if (viewport.Extent.Right > maxExtent.Right)
{
viewport.Center.X += maxExtent.Right - viewport.Extent.Right;
}
}
if (MapHeightSpansViewport(maxExtent.Height, viewport.Height, viewport.Resolution)) // if it does't fit don't restrict
{
//if ((viewport.Extent.Top> maxExtent.Top) && (viewport.Extent.Bottom < maxExtent.Bottom))
// throw new Exception();
if (viewport.Extent.Top > maxExtent.Top)
{
viewport.Center.Y += maxExtent.Top - viewport.Extent.Top;
}
if (viewport.Extent.Bottom < maxExtent.Bottom)
{
viewport.Center.Y += maxExtent.Bottom - viewport.Extent.Bottom;
}
}
}
}
public static void Limit(IViewport viewport,
ZoomMode zoomMode, MinMax zoomLimits, IReadOnlyList <double> mapResolutions,
PanMode panMode, BoundingBox panLimits, BoundingBox mapEnvelope)
{
viewport.Resolution = LimitResolution(viewport.Resolution, viewport.Width, viewport.Height, zoomMode, zoomLimits, mapResolutions, mapEnvelope);
LimitExtent(viewport, panMode, panLimits, mapEnvelope);
}
public static void LimitExtent(IViewport viewport, PanMode panMode, BoundingBox panLimits, BoundingBox mapEnvelope)
{
var maxExtent = panLimits ?? mapEnvelope;
if (maxExtent == null)
{
return; // Can be null because both panLimits and Map.Extent can be null. The Map.Extent can be null if the extent of all layers is null
}
if (panMode == PanMode.KeepCenterWithinExtents)
{
if (viewport.Center.X < maxExtent.Left)
{
viewport.Center.X = maxExtent.Left;
}
if (viewport.Center.X > maxExtent.Right)
{
viewport.Center.X = maxExtent.Right;
}
if (viewport.Center.Y > maxExtent.Top)
{
viewport.Center.Y = maxExtent.Top;
}
if (viewport.Center.Y < maxExtent.Bottom)
{
viewport.Center.Y = maxExtent.Bottom;
}
}
else if (panMode == PanMode.KeepViewportWithinExtents)
{
var cos = Math.Abs(Math.Cos(viewport.Rotation * Utilities.Constants.DegreesToRadians));
var sin = Math.Abs(Math.Sin(viewport.Rotation * Utilities.Constants.DegreesToRadians));
var window = viewport.WindowExtent.ToBoundingBox();
if (MapWidthSpansViewport(maxExtent.Width, viewport.Width, viewport.Resolution)) // if it does't fit don't restrict
{
//if ((viewport.Extent.Left < maxExtent.Left) && (viewport.Extent.Right > maxExtent.Right))
// throw new Exception();
if (viewport.Extent.Left < maxExtent.Left)
{
viewport.Center.X += (maxExtent.Left - viewport.Extent.Left) * cos;
}
if (viewport.Extent.Right > maxExtent.Right)
{
viewport.Center.X += (maxExtent.Right - viewport.Extent.Right) * cos;
}
}
if (MapHeightSpansViewport(maxExtent.Height, viewport.Height, viewport.Resolution)) // if it does't fit don't restrict
{
//if ((viewport.Extent.Top> maxExtent.Top) && (viewport.Extent.Bottom < maxExtent.Bottom))
// throw new Exception();
if (viewport.Extent.Top > maxExtent.Top)
{
viewport.Center.Y += (maxExtent.Top - viewport.Extent.Top) * sin;
}
if (viewport.Extent.Bottom < maxExtent.Bottom)
{
viewport.Center.Y += (maxExtent.Bottom - viewport.Extent.Bottom) * sin;
}
}
}
}
