/// <summary>
/// Ensure that this label knows it's enclosing polygon.
/// </summary>
/// <returns>True if label successfully associated with polygon.</returns>
internal void SetPolygon()
{
// Return if this label is already associated with a polygon (or the
// label was previously found to be inside nothing)
if (IsBuilt)
{
return;
}
// If this is a non-topological label, mark is as "built"
// and return (it should have been previously marked as built).
if (IsTopological)
{
// Get the label's reference position.
IPointGeometry posn = GetPolPosition();
// Try to find enclosing polygon
ISpatialIndex index = CadastralMapModel.Current.Index;
Polygon enc = new FindPointContainerQuery(index, posn).Result;
if (enc != null)
{
enc.ClaimLabel(this);
}
}
SetBuilt(true);
}
/// <summary>
/// Re-calculates the polygon that encloses this label. This should be called whenever
/// the polygon reference position gets changed (if a polygon reference position is
/// not explicit, this will arise when the text itself is moved). Does nothing if the
/// label is not currently marked as "built".
/// </summary>
internal void RecalculateEnclosingPolygon()
{
if (!IsBuilt)
{
return;
}
if (!IsTopological)
{
return;
}
// If a container was previously defined, first check whether it's still the
// enclosing polygon (if so, we're done).
IPointGeometry p = GetPolPosition();
if (m_Container != null && m_Container.IsEnclosing(p))
{
return;
}
// If a container was previously defined, break the association with this label
if (m_Container != null)
{
m_Container.ReleaseLabel(this);
Debug.Assert(m_Container == null);
}
// Figure out which polygon now encloses this label (if any)
ISpatialIndex index = CadastralMapModel.Current.Index;
Polygon enc = new FindPointContainerQuery(index, p).Result;
if (enc != null)
{
enc.ClaimLabel(this);
}
}
/// <summary>
/// Ensure that this label knows it's enclosing polygon.
/// </summary>
/// <returns>True if label successfully associated with polygon.</returns>
internal void SetPolygon()
{
// Return if this label is already associated with a polygon (or the
// label was previously found to be inside nothing)
if (IsBuilt)
return;
// If this is a non-topological label, mark is as "built"
// and return (it should have been previously marked as built).
if (IsTopological)
{
// Get the label's reference position.
IPointGeometry posn = GetPolPosition();
// Try to find enclosing polygon
ISpatialIndex index = CadastralMapModel.Current.Index;
Polygon enc = new FindPointContainerQuery(index, posn).Result;
if (enc!=null)
enc.ClaimLabel(this);
}
SetBuilt(true);
}
/// <summary>
/// Re-calculates the polygon that encloses this label. This should be called whenever
/// the polygon reference position gets changed (if a polygon reference position is
/// not explicit, this will arise when the text itself is moved). Does nothing if the
/// label is not currently marked as "built".
/// </summary>
internal void RecalculateEnclosingPolygon()
{
if (!IsBuilt)
return;
if (!IsTopological)
return;
// If a container was previously defined, first check whether it's still the
// enclosing polygon (if so, we're done).
IPointGeometry p = GetPolPosition();
if (m_Container!=null && m_Container.IsEnclosing(p))
return;
// If a container was previously defined, break the association with this label
if (m_Container!=null)
{
m_Container.ReleaseLabel(this);
Debug.Assert(m_Container==null);
}
// Figure out which polygon now encloses this label (if any)
ISpatialIndex index = CadastralMapModel.Current.Index;
Polygon enc = new FindPointContainerQuery(index, p).Result;
if (enc!=null)
enc.ClaimLabel(this);
}