/// <summary>
/// 画单个图层方法
/// </summary>
/// <param name="g"></param>
/// <param name="layer"></param>
/// <param name="start"></param>
/// <param name="scale"></param>
/// <returns></returns>
private Point LegendOfLayer(Graphics g, Map.MyLayer layer, Point start, double resizescale)
{
int layerdis = (int)(20 * resizescale);
int leftdis = (int)(resizescale * 8);
int columdis = (int)(resizescale * 12);
int rowdis = (int)(resizescale * 10);
Point nowstart = new Point(start.X + leftdis, start.Y + layerdis);
g.DrawString(layer.LayerName, new Font("黑体", (float)(resizescale * 10)), Brushes.Black, nowstart);
nowstart.Y += ((int)(resizescale * 10) + rowdis);
Font regularfont = new Font("宋体", (float)(resizescale * 9));
int symbolcount = layer.Renderer.SymbolCount;
switch (layer.rendertype)
{
case MyRenderer.RendererType.UniqueValueRenderer:
UniqueValueRenderer urenderer = (UniqueValueRenderer)layer.Renderer;
for (int i = 0; i < symbolcount; i++)
{
Bitmap autoubit = urenderer.FindSymbolByIndex(i).GetBitmap();
Image uimg = new Bitmap(autoubit, new Size((int)(resizescale * autoubit.Width), (int)(resizescale * autoubit.Height)));
g.DrawImage(uimg, nowstart);
g.DrawString(urenderer.FindValue(i), regularfont, Brushes.Black, new Point(nowstart.X + (int)(resizescale * 42) + columdis, nowstart.Y + (int)(resizescale * 6)));
nowstart.Y += (int)(resizescale * 24) + rowdis;
}
break;
case MyRenderer.RendererType.ClassBreakRenderer:
ClassBreakRenderer crenderer = (ClassBreakRenderer)layer.Renderer;
for (int i = 0; i < symbolcount; i++)
{
Bitmap autocbit = crenderer.FindSymbolByIndex(i).GetBitmap();
Image cimg = new Bitmap(autocbit, new Size((int)(resizescale * autocbit.Width), (int)(resizescale * autocbit.Height)));
g.DrawImage(cimg, nowstart);
string value;
if (i == 0)
{
value = crenderer.MinValue.ToString() + " - " + crenderer.Breaks[i].ToString();
}
else if (i != crenderer.BreakCount)
{
value = crenderer.Breaks[i - 1].ToString() + " - " + crenderer.Breaks[i].ToString();
}
else
{
value = crenderer.Breaks[i - 1].ToString() + " - " + crenderer.MaxValue.ToString();
}
g.DrawString(value, regularfont, Brushes.Black, new Point((nowstart.X + (int)(resizescale * 42) + columdis), (nowstart.Y + (int)(resizescale * 6))));
nowstart.Y += (int)(resizescale * 24) + rowdis;
}
break;
default:
SimpleRenderer srenderer = (SimpleRenderer)layer.Renderer;
Bitmap autosbit = srenderer.SymbolStyle.GetBitmap();
Image simg = new Bitmap(autosbit, new Size((int)(resizescale * autosbit.Width), (int)(resizescale * autosbit.Height)));
g.DrawImage(simg, nowstart);
g.DrawString(layer.LayerName, regularfont, Brushes.Black, new Point((nowstart.X + (int)(resizescale * 42) + columdis), (nowstart.Y + (int)(resizescale * 6))));
nowstart.Y += ((int)(resizescale * 24) + rowdis);
break;
}
return(nowstart);
}
public void Open()
{
FileStream fs = new FileStream(_filepath, FileMode.Open);
StreamReader sr = new StreamReader(fs);
string line = sr.ReadLine();
string[] words = line.Split(' ');
_Geocoordinate = Map.MyCoordinates.WGS1984; //由于不存在null选项
_Procoordinate = Map.MyCoordinates.WGS1984; //由于不存在null选项
//记录地理坐标系
switch (words[1])
{
case "WGS1984":
_Geocoordinate = Map.MyCoordinates.WGS1984;
break;
}
//记录投影坐标系
switch (words[2])
{
case "WGS1984":
_Geocoordinate = Map.MyCoordinates.WGS1984;
break;
}
//生成地图
_map = new Map.MyMap(words[0], _Geocoordinate, Convert.ToDouble(words[3]));
_ratio = Convert.ToDouble(words[3]);
_scaleindex = Convert.ToInt32(words[4]);
//显示中心点位
_centerpos = new PointF((float)Convert.ToDouble(words[5]), (float)Convert.ToDouble(words[6]));
//图层数量
int layercount = Convert.ToInt32(words[7]);
for (int i = 0; i < layercount; i++)
{
string layerpath = sr.ReadLine();
Map.MyLayer newlayer = null;
if (Path.GetExtension(layerpath) == ".shp")
{
//TODO先只可读SHP
Shapefile newshp = new Shapefile(layerpath);
newlayer = new MyLayer(newshp);
}
else
{
CosmosGisVector newcgv = new CosmosGisVector(layerpath);
newlayer = new MyLayer(newcgv);
}
newlayer.FilePath = layerpath;
//设置是否可见
string visible = sr.ReadLine();
if (visible == "True")
{
newlayer.Visible = true;
}
else
{
newlayer.Visible = false;
}
//获取渲染方式
string layerline = sr.ReadLine();
RendererType newrendertyppe = new GetType().RendererType(layerline.Split(' ')[0]);
newlayer.rendertype = newrendertyppe;
switch (newrendertyppe)
{
//唯一值渲染
case RendererType.UniqueValueRenderer:
string field_uvr = layerline.Split(' ')[1];
//TODO 获得属性唯一值
DataTable dt_uvr = newlayer.SpaceData.Property.SqlQuery("Select Distinct " + field_uvr + " From " + newlayer.LayerName);
List <string> values_uvr = new List <string>();
for (int j = 0; j < dt_uvr.Rows.Count; j++)
{
values_uvr.Add(dt_uvr.Rows[j][field_uvr].ToString());
}
//List<string> values = new List<string>() { "1", "2", "3", "3" ,"3","3","7"};
newlayer.Renderer = new UniqueValueRenderer(newlayer.DataType, field_uvr, values_uvr);
break;
//分级渲染
case RendererType.ClassBreakRenderer:
string field_cbr = layerline.Split(' ')[1];
DataTable dt_cbr = newlayer.SpaceData.Property.SqlQuery("Select Distinct " + field_cbr + " From " + newlayer.LayerName);
List <double> values_cbr = new List <double>();
for (int j = 0; j < dt_cbr.Rows.Count; j++)
{
values_cbr.Add(Convert.ToDouble(dt_cbr.Rows[j][field_cbr]));
}
//List<double> breaks = new List<double>() { 1, 2, 3 };
newlayer.Renderer = new ClassBreakRenderer(newlayer.DataType, field_cbr, values_cbr);
break;
//简单渲染
default:
newlayer.Renderer = new SimpleRenderer(newlayer.DataType);
break;
}
//判断是否有注记信息
string hastext = sr.ReadLine();
if (hastext == "True")
{
newlayer.HasText = true;
newlayer.Textrender = new TextRenderer(sr.ReadLine());
}
else
{
newlayer.HasText = false;
}
_map.AddLayer(newlayer);
}
sr.Close();
fs.Close();
}