protected override void OnActivate()
{
base.OnActivate();
try
{
if (Painter.ActiveLayer == null)
{
return;
}
UID dockWinID = new UIDClass();
dockWinID.Value = ThisAddIn.IDs.ValueSymbolForm;
IDockableWindow dockWindow = ArcMap.DockableWindowManager.GetDockableWindow(dockWinID);
if (!dockWindow.IsVisible())
{
dockWindow.Show(true);
}
IRasterLayer rasterLayer = (IRasterLayer)Painter.ActiveLayer;
IRasterProps rasterProp = (IRasterProps)rasterLayer.Raster;
layerExetent = new Envelope(0, rasterProp.Height - 1, 0, rasterProp.Width - 1);
}
catch (Exception ex)
{
MessageBox.Show(string.Format("Unfortunately, the application meets an error.\n\nSource: {0}\nSite: {1}\nMessage: {2}", ex.Source, ex.TargetSite, ex.Message), "Error");
}
}
protected override void OnActivate()
{
base.OnActivate();
if (Painter.ActiveLayer == null)
{
return;
}
IRasterLayer rasterLayer = (IRasterLayer)Painter.ActiveLayer;
IRasterProps rasterProp = (IRasterProps)rasterLayer.Raster;
layerExetent = new Envelope(0, rasterProp.Height - 1, 0, rasterProp.Width - 1);
}
protected override void OnActivate()
{
base.OnActivate();
if (Painter.ActiveLayer == null)
{
return;
}
UID dockWinID = new UIDClass();
dockWinID.Value = ThisAddIn.IDs.ValueSymbolForm;
IDockableWindow dockWindow = ArcMap.DockableWindowManager.GetDockableWindow(dockWinID);
if (!dockWindow.IsVisible())
{
dockWindow.Show(true);
}
IRasterLayer rasterLayer = (IRasterLayer)Painter.ActiveLayer;
IRasterProps rasterProp = (IRasterProps)rasterLayer.Raster;
layerExetent = new Envelope(0, rasterProp.Height - 1, 0, rasterProp.Width - 1);
}
/// <summary>
/// Gets pixels on given line using Digital Differential Analyzer(DDA).
/// </summary>
/// <param name="startPos">Starting position</param>
/// <param name="endPos">Ending position</param>
/// <returns></returns>
private static Position[] DDALine(Position startPos, Position endPos, Envelope envelope)
{
int x0 = startPos.Column;
int y0 = startPos.Row;
int x1 = endPos.Column;
int y1 = endPos.Row;
int dx = x1 - x0;
int dy = y1 - y0;
double x = x0;
double y = y0;
int steps = 0;
if (System.Math.Abs(dx) > System.Math.Abs(dy))
{
steps = (int)System.Math.Abs(dx);
}
else
{
steps = (int)System.Math.Abs(dy);
}
List<Position> line = new List<Position>();
double xIncrement = dx / (double)steps;
double yincrement = dy / (double)steps;
for (int k = 0; k <= steps; k++)
{
if (x >= 0 && x <= envelope.MaxColumn && y >= 0 && y <= envelope.MaxRow)
{
line.Add(new Position((int)System.Math.Round(x), (int)System.Math.Round(y)));
}
x += xIncrement;
y += yincrement;
}
return line.ToArray();
}
/// <summary>
/// Gets locations of pixels on a specified polyline.
/// </summary>
/// <param name="startPos">Starting position of the polyline.</param>
/// <param name="endPos">Ending position of the polyline.</param>
/// <param name="envelop">Envelop of editting raster.</param>
/// <returns></returns>
public static Position[] GetPolyline(Position startPos, Position endPos, Envelope envelop)
{
Position[] polyline;
Position pStartPos = startPos;
Position pEndPos = endPos;
#region Horizontal Line
if (pStartPos.Column == pEndPos.Column)
{
if (pStartPos.Row > pEndPos.Row)
{
Position temp = pStartPos;
pStartPos = pEndPos;
pEndPos = startPos;
}
pStartPos.Adjust(envelop);
pEndPos.Adjust(envelop);
polyline = new Position[pEndPos.Row - pStartPos.Row + 1];
for (int i = pStartPos.Row; i <= pEndPos.Row; i++)
{
polyline[i - pStartPos.Row] = new Position(pStartPos.Column, i);
}
return polyline;
}
#endregion
#region Vertical Line
if (pStartPos.Row == pEndPos.Row)
{
if (pStartPos.Column > pEndPos.Column)
{
Position temp = pStartPos;
pStartPos = pEndPos;
pEndPos = startPos;
}
pStartPos.Adjust(envelop);
pEndPos.Adjust(envelop);
polyline = new Position[pEndPos.Column - pStartPos.Column + 1];
for (int i = pStartPos.Column; i <= pEndPos.Column; i++)
{
polyline[i - pStartPos.Column] = new Position(pStartPos.Column, i);
}
return polyline;
}
#endregion
return DDALine(pStartPos, pEndPos, envelop);
}
/// <summary>
/// Get the position of pixels at line of the polygon.
/// </summary>
/// <param name="vertexes"></param>
/// <param name="envelope"></param>
/// <returns></returns>
public static Position[] GetPolygon(Position[] vertexes, Envelope envelope)
{
List<Position> lines = new List<Position>();
// It is not sure that whether the final vertex will be the first one. I assume it is.
for (int i = 0; i < vertexes.Length - 1; i++)
{
Position[] line = GetPolyline(vertexes[i], vertexes[i + 1], envelope);
lines.AddRange(line);
}
return lines.ToArray();
}
/// <summary>
/// Adjust the position to satisfy the given envelop.
/// </summary>
/// <param name="maxExtent"></param>
public void Adjust(Envelope envelop)
{
Adjust(envelop.TLCorner, envelop.BRCorner);
}
