/// <summary>
/// 在指定的层上更新选择的shapes
/// 别的层上的选择将保持
/// </summary>
/// <param name="sf">要更新的Shapefile</param>
/// <param name="shpIndices">所有相关的Shape的索引集合</param>
/// <param name="mode">选择操作</param>
/// <returns></returns>
public MapWinGIS.Interfaces.SelectInfo UpdateSelection(int layerHandle, ref int[] shpIndices, Interfaces.SelectionOperation mode)
{
//清空原来存储的
m_selection = null;
Interfaces.Layer layer = Program.frmMain.m_Layers[layerHandle];
if (layer == null)
{
return(null);
}
MapWinGIS.Shapefile sf = layer.GetObject() as MapWinGIS.Shapefile;
if (sf == null)
{
return(null);
}
if (mode == Interfaces.SelectionOperation.SelectNew)
{
sf.SelectNone();
}
if (shpIndices != null && shpIndices.Length > 0)
{
int i;
int shpIndicesLen = shpIndices.Length;
if (mode == Interfaces.SelectionOperation.SelectNew)
{
for (i = 0; i < shpIndicesLen; i++)
{
sf.ShapeSelected[shpIndices[i]] = true;
}
}
else if (mode == Interfaces.SelectionOperation.SelectAdd)
{
for (i = 0; i < shpIndicesLen; i++)
{
sf.ShapeSelected[shpIndices[i]] = true;
}
}
else if (mode == Interfaces.SelectionOperation.SelectExclude)
{
for (i = 0; i < shpIndicesLen; i++)
{
sf.ShapeSelected[shpIndices[i]] = false;
}
}
else if (mode == Interfaces.SelectionOperation.SelectInvert)
{
for (i = 0; i < shpIndicesLen; i++)
{
sf.ShapeSelected[shpIndices[i]] = !sf.ShapeSelected[shpIndices[i]];
}
}
}
Program.frmMain.UpdateButtons();
bool handled = false;
Program.frmMain.FireLayerSelectionChanged(layerHandle, ref handled);
return(layer.SelectedShapes);
}
/// <summary>
/// 根据给定的shapefile、范围、容差来将选择的shape存入shapeInfo集合中
/// </summary>
internal MapWinGIS.Interfaces.SelectInfo PerformSelection(MapWinGIS.Shapefile sf, MapWinGIS.Extents bounds, double tolerance)
{
SelectInfo m_SelectedShapes = new SelectInfo(this.LegendControl.SelectedLayer);
if (m_SelectedShapes == null)
{
m_SelectedShapes = new MainProgram.SelectInfo(this.LegendControl.SelectedLayer);
}
m_SelectedShapes.ClearSelectedShapesTemp();
object arr = null;
System.Array results = null;
if (sf.SelectShapes(bounds, tolerance, m_Selectmethod, ref arr))
{
results = (System.Array)arr;
}
if (m_SelectionOperation == Interfaces.SelectionOperation.SelectNew)
{
sf.SelectNone();
}
int i;
//设置选择的shape
if (results != null && results.Length > 0)
{
int len = results.Length;
if (m_SelectionOperation == Interfaces.SelectionOperation.SelectNew)
{
for (i = 0; i < len; i++)
{
sf.ShapeSelected[((int)results.GetValue(i))] = true;
}
}
else if (m_SelectionOperation == Interfaces.SelectionOperation.SelectAdd)
{
for (i = 0; i < len; i++)
{
sf.ShapeSelected[((int)results.GetValue(i))] = true;
}
}
else if (m_SelectionOperation == Interfaces.SelectionOperation.SelectExclude)
{
for (i = 0; i < len; i++)
{
sf.ShapeSelected[((int)results.GetValue(i))] = false;
}
}
else if (m_SelectionOperation == Interfaces.SelectionOperation.SelectInvert)
{
for (i = 0; i < len; i++)
{
sf.ShapeSelected[((int)results.GetValue(i))] = !sf.ShapeSelected[((int)results.GetValue(i))];
}
}
}
else
{
if (m_SelectionOperation == Interfaces.SelectionOperation.SelectNew)
{
sf.SelectNone();
}
}
// 将选择的shape添加到shapeInfo集合中
for (i = 0; i < sf.NumShapes; i++)
{
if (sf.ShapeSelected[i])
{
SelectedShape shape = new SelectedShape();
shape.Add(i);
m_SelectedShapes.AddSelectedShape(shape);
}
}
m_selection = null;
this.Redraw();
return(m_SelectedShapes);
}