/// <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);
}
}
private ISpatialObject SelectObject(ISpatialDisplay display, IPosition p, SpatialType spatialType)
{
ProjectSettings ps = m_Project.Settings;
CadastralMapModel cmm = this.CadastralMapModel;
ISpatialSelection currentSel = this.SpatialSelection;
ISpatialObject oldItem = currentSel.Item;
ISpatialObject newItem;
// Try to find a point feature if points are drawn.
if ((spatialType & SpatialType.Point) != 0 && display.MapScale <= ps.ShowPointScale)
{
ILength size = new Length(ps.PointHeight * 0.5);
newItem = cmm.QueryClosest(p, size, SpatialType.Point);
if (newItem != null)
{
return(newItem);
}
}
// If we are adding a line, don't bother trying to select
// lines or polygons or text.
/*
* if (m_Op==ID_LINE_NEW || m_Op==ID_LINE_CURVE)
* return 0;
*/
ILength tol = new Length(0.001 * display.MapScale);
// Try to find a line, using a tolerance of 1mm at the draw scale.
if ((spatialType & SpatialType.Line) != 0)
{
// If we previously selected something, see if the search point
// lies within tolerance. If so, just return with what we've already got
// ...just make the query (the issue here has to do with special highlighting
// for topological sections -- if you point at another section of a line, the
// highlighting doesn't move).
// if (oldItem!=null && oldItem.SpatialType==SpatialType.Line)
// {
// ILength dist = oldItem.Distance(p);
// if (dist.Meters < tol.Meters)
// return;
// }
newItem = cmm.QueryClosest(p, tol, SpatialType.Line);
if (newItem != null)
{
return(newItem);
}
}
// Try for a text string if text is drawn.
// The old software handles text by checking that the point is inside
// the outline, not sure whether the new index provides acceptable alternative.
if ((spatialType & SpatialType.Text) != 0 && display.MapScale <= ps.ShowLabelScale)
{
newItem = cmm.QueryClosest(p, tol, SpatialType.Text);
if (newItem != null)
{
return(newItem);
}
}
// Just return if a command dialog is up,
// since selecting a polygon is distracting at that stage
// (really, this applies to things like intersect commands).
// There MIGHT be cases at some later date where we really
// do want to select pols...
// For updates, allow polygon selection
if (IsCommandRunning && !(m_Command is UpdateUI))
{
return(null);
}
if ((spatialType & SpatialType.Polygon) != 0)
{
// If we currently have a selected polygon, see if we're still inside it.
/*
* if (oldItem is Polygon)
* {
* Polygon oldPol = (oldItem is Polygon);
* if (oldPol.IsEnclosing(p))
*
* }
*/
IPointGeometry pg = PointGeometry.Create(p);
ISpatialIndex index = cmm.Index;
Polygon pol = new FindPointContainerQuery(index, pg).Result;
if (pol != null)
{
return(pol);
}
}
return(null);
}
private ISpatialObject SelectObject(ISpatialDisplay display, IPosition p, SpatialType spatialType)
{
ProjectSettings ps = m_Project.Settings;
CadastralMapModel cmm = this.CadastralMapModel;
ISpatialSelection currentSel = this.SpatialSelection;
ISpatialObject oldItem = currentSel.Item;
ISpatialObject newItem;
// Try to find a point feature if points are drawn.
if ((spatialType & SpatialType.Point) != 0 && display.MapScale <= ps.ShowPointScale)
{
ILength size = new Length(ps.PointHeight * 0.5);
newItem = cmm.QueryClosest(p, size, SpatialType.Point);
if (newItem!=null)
return newItem;
}
// If we are adding a line, don't bother trying to select
// lines or polygons or text.
/*
if (m_Op==ID_LINE_NEW || m_Op==ID_LINE_CURVE)
return 0;
*/
ILength tol = new Length(0.001 * display.MapScale);
// Try to find a line, using a tolerance of 1mm at the draw scale.
if ((spatialType & SpatialType.Line)!=0)
{
// If we previously selected something, see if the search point
// lies within tolerance. If so, just return with what we've already got
// ...just make the query (the issue here has to do with special highlighting
// for topological sections -- if you point at another section of a line, the
// highlighting doesn't move).
// if (oldItem!=null && oldItem.SpatialType==SpatialType.Line)
// {
// ILength dist = oldItem.Distance(p);
// if (dist.Meters < tol.Meters)
// return;
// }
newItem = cmm.QueryClosest(p, tol, SpatialType.Line);
if (newItem!=null)
return newItem;
}
// Try for a text string if text is drawn.
// The old software handles text by checking that the point is inside
// the outline, not sure whether the new index provides acceptable alternative.
if ((spatialType & SpatialType.Text)!=0 && display.MapScale <= ps.ShowLabelScale)
{
newItem = cmm.QueryClosest(p, tol, SpatialType.Text);
if (newItem!=null)
return newItem;
}
// Just return if a command dialog is up,
// since selecting a polygon is distracting at that stage
// (really, this applies to things like intersect commands).
// There MIGHT be cases at some later date where we really
// do want to select pols...
// For updates, allow polygon selection
if (IsCommandRunning && !(m_Command is UpdateUI))
return null;
if ((spatialType & SpatialType.Polygon)!=0)
{
// If we currently have a selected polygon, see if we're still inside it.
/*
if (oldItem is Polygon)
{
Polygon oldPol = (oldItem is Polygon);
if (oldPol.IsEnclosing(p))
}
*/
IPointGeometry pg = PointGeometry.Create(p);
ISpatialIndex index = cmm.Index;
Polygon pol = new FindPointContainerQuery(index, pg).Result;
if (pol!=null)
return pol;
}
return null;
}
/// <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);
}