/// <summary>
/// 将指定索引的图层移动到另一指定索引
/// </summary>
/// <param name="fromIndex"></param>
/// <param name="toIndex"></param>
public void MoveTo(Int32 fromIndex, Int32 toIndex)
{
if (fromIndex == toIndex)
{
return;
}
else
{
moMapLayer sLayer = _Layers[fromIndex];
_Layers.RemoveAt(fromIndex);
_Layers.Insert(toIndex, sLayer);
}
}
private void DrawBufferMap2()
{
//（1）获取地图窗口的范围
moRectangle sExtent = GetExtent();
if (sExtent.IsEmpty == true)
{
return;
}
//（2）绘制缓冲位图1
Graphics g = Graphics.FromImage(mBufferMap2);
g.Clear(Color.White);
Rectangle sRect = new Rectangle(0, 0, mBufferMap1.Width, mBufferMap1.Height);
g.DrawImage(mBufferMap1, sRect, sRect, GraphicsUnit.Pixel);
//（3）绘制所有图层的选择要素，采用倒序
double sMapScale = mMapDrawingReference.MapScale;
double dpm = mMapDrawingReference.dpm;
double mpu = mMapDrawingReference.mpu;
Int32 sLayerCount = _Layers.Count;
for (Int32 i = sLayerCount - 1; i >= 0; i--)
{
moMapLayer sLayer = _Layers.GetItem(i);
if (sLayer.ShapeType == moGeometryTypeConstant.Point)
{
sLayer.DrawSelectedFeatures(g, sExtent, sMapScale, dpm, mpu, mSelectedPointSymbol);
}
else if (sLayer.ShapeType == moGeometryTypeConstant.MultiPolyline)
{
sLayer.DrawSelectedFeatures(g, sExtent, sMapScale, dpm, mpu, mSelectedLineSymbol);
}
else if (sLayer.ShapeType == moGeometryTypeConstant.MultiPolygon)
{
sLayer.DrawSelectedFeatures(g, sExtent, sMapScale, dpm, mpu, mSelectedFillSymbol);
}
}
//（4）触发事件，以便用户程序继续绘图
if (AfterTrackingLayerDraw != null)
{
//新建绘图工具
moUserDrawingTool sDrawingTool = CreateDrawingTool(g);
AfterTrackingLayerDraw(this, sDrawingTool);
}
g.Dispose();
}
/// <summary>
/// 根据指定的选择盒与选择方法执行选择
/// </summary>
/// <param name="selectingBox"></param>
/// <param name="tolerance"></param>
/// <param name="selectMethod"></param>
public void SelectByBox(moRectangle selectingBox, double tolerance, Int32 selectMethod)
{
Int32 sLayerCount = _Layers.Count;
for (Int32 i = 0; i < sLayerCount; i++)
{
moMapLayer sLayer = _Layers.GetItem(i);
if (sLayer.Visible == true && sLayer.Selectable == true)
{
moFeatures sFeatures = sLayer.SearchByBox(selectingBox, tolerance);
sLayer.ExecuteSelect(sFeatures, selectMethod);
}
else
{
sLayer.SelectedFeatures.Clear();
}
}
}
/// <summary>
/// 获取地图范围
/// </summary>
/// <returns></returns>
public moRectangle GetFullExtent()
{
//（1）新建一个空矩形
double sMinX = double.MaxValue, sMaxX = double.MinValue;
double sMinY = double.MaxValue, sMaxY = double.MinValue;
moRectangle sFullExtent;
//（2）如果图层数量为0，则返回空矩形
Int32 sLayerCount = _Layers.Count;
if (sLayerCount == 0)
{
sFullExtent = new moRectangle(sMinX, sMaxX, sMinY, sMaxY);
return(sFullExtent);
}
//（3）计算范围矩形
for (Int32 i = 0; i <= sLayerCount - 1; i++)
{
moMapLayer sLayer = _Layers.GetItem(i);
moRectangle sExtent = sLayer.Extent;
if (sExtent.IsEmpty == false)
{
if (sExtent.MinX < sMinX)
{
sMinX = sExtent.MinX;
}
if (sExtent.MaxX > sMaxX)
{
sMaxX = sExtent.MaxX;
}
if (sExtent.MinY < sMinY)
{
sMinY = sExtent.MinY;
}
if (sExtent.MaxY > sMaxY)
{
sMaxY = sExtent.MaxY;
}
}
}
sFullExtent = new moRectangle(sMinX, sMaxX, sMinY, sMaxY);
return(sFullExtent);
}
private void DrawBufferMap1()
{
//（1）获取地图窗口的范围
moRectangle sExtent = GetExtent();
if (sExtent.IsEmpty == true)
{
return;
}
//（2）绘制所有图层的要素，采用倒序
double sMapScale = mMapDrawingReference.MapScale;
double dpm = mMapDrawingReference.dpm;
double mpu = mMapDrawingReference.mpu;
Graphics g = Graphics.FromImage(mBufferMap1);
g.Clear(Color.White);
Int32 sLayerCount = _Layers.Count;
for (Int32 i = sLayerCount - 1; i >= 0; i--)
{
moMapLayer sLayer = _Layers.GetItem(i);
if (sLayer.Visible == true)
{
sLayer.DrawFeatures(g, sExtent, sMapScale, dpm, mpu);
}
}
//（3）绘制所有图层的注记，依然倒序
List <RectangleF> sPlacedLabelExtents = new List <RectangleF>();
for (Int32 i = sLayerCount - 1; i >= 0; i--)
{
moMapLayer sLayer = _Layers.GetItem(i);
if (sLayer.Visible == true)
{
sLayer.DrawLabels(g, sExtent, sMapScale, dpm, mpu, sPlacedLabelExtents);
}
}
g.Dispose();
}
/// <summary>
/// 移除指定图层
/// </summary>
/// <param name="mapLayer"></param>
public void Remove(moMapLayer mapLayer)
{
_Layers.Remove(mapLayer);
}
/// <summary>
/// 在图层序列末尾增加一个图层
/// </summary>
/// <param name="mapLayer"></param>
public void Add(moMapLayer mapLayer)
{
_Layers.Add(mapLayer);
}