/// <summary>
/// 绘制所有选择要素
/// </summary>
/// <param name="g"></param>
/// <param name="extent"></param>
/// <param name="mapScale"></param>
/// <param name="dpm"></param>
/// <param name="mpu"></param>
/// <param name="symbol"></param>
internal void DrawSelectedFeatures(Graphics g, moRectangle extent, double mapScale, double dpm, double mpu, moSymbol symbol)
{
//判断是否位于绘制范围内，不是，则绘制
Int32 sFeatureCount = _SelectedFeatures.Count;
for (Int32 i = 0; i < sFeatureCount; i++)
{
moFeature sFeature = _SelectedFeatures.GetItem(i);
if (IsFeatureInExtent(sFeature, extent) == true)
{
moGeometry sGeometry = sFeature.Geometry;
moMapDrawingTools.DrawGeometry(g, extent, mapScale, dpm, mpu, sGeometry, symbol);
}
}
}
/// <summary>
/// 根据指定方法执行选择，selectMethod即新建、求差、求交等
/// </summary>
/// <param name="features"></param>
/// <param name="selectMethod"></param>
public void ExecuteSelect(moFeatures features, Int32 selectMethod)
{
//说明：此处仅考虑新建集合
if (selectMethod == 0)
{
_SelectedFeatures.Clear();
Int32 sFeatureCount = features.Count;
for (Int32 i = 0; i < sFeatureCount; i++)
{
_SelectedFeatures.Add(features.GetItem(i));
}
}
else
{
throw new NotFiniteNumberException();
}
}
/// <summary>
/// 绘制所有要素
/// </summary>
/// <param name="g">绘图对象</param>
/// <param name="extent">绘制范围（地图坐标）</param>
/// <param name="mapScale">地图比例尺的倒数</param>
/// <param name="dpm">每米对应的点数</param>
/// <param name="mpu">地图坐标单位对应的米数</param>
internal void DrawFeatures(Graphics g, moRectangle extent, double mapScale, double dpm, double mpu)
{
//（1）为所有要素配置符号
SetFeatureSymbols();
//（2）判断是否位于绘制范围内，如是，则绘制
Int32 sFeatureCount = _Features.Count;
for (Int32 i = 0; i < sFeatureCount; i++)
{
moFeature sFeature = _Features.GetItem(i);
if (IsFeatureInExtent(sFeature, extent) == true)
{
moGeometry sGeometry = sFeature.Geometry;
moSymbol sSymbol = sFeature.Symbol;
moMapDrawingTools.DrawGeometry(g, extent, mapScale, dpm, mpu, sGeometry, sSymbol);
}
}
}