private void GetLabelLocation(masLabelPosition position, Graphics g, ref PointF pointF, SizeF fontSize, ISymbol currentSymbol)
{
if (currentSymbol != null && !currentSymbol.SymbolSize.IsEmpty)
{
pointF.X -= fontSize.Width / 2f;
pointF.Y -= fontSize.Height / 2f;
SizeF symSize = currentSymbol.SymbolSize;
int diff = 2;
switch (position)
{
case masLabelPosition.RightCenter:
pointF.X = pointF.X + fontSize.Width / 2 + symSize.Width / 2f + diff;
break;
case masLabelPosition.LeftCenter:
pointF.X = pointF.X - fontSize.Width / 2 - symSize.Width / 2f - diff;
break;
case masLabelPosition.BottomCenter:
pointF.Y = pointF.Y + fontSize.Height / 2 + symSize.Height / 2f + diff;
break;
case masLabelPosition.UpCenter:
pointF.Y = pointF.Y - fontSize.Height / 2 - symSize.Height / 2f - diff;
break;
case masLabelPosition.RightUpCorner:
pointF.X = pointF.X + fontSize.Width / 2 + symSize.Width / 2f;
pointF.Y = pointF.Y - fontSize.Height / 2 - symSize.Height / 2f;
break;
case masLabelPosition.RightDownCorner:
pointF.X = pointF.X + fontSize.Width / 2 + symSize.Width / 2f;
pointF.Y = pointF.Y + fontSize.Height / 2 + symSize.Height / 2f;
break;
case masLabelPosition.LeftUpCorner:
pointF.X = pointF.X - fontSize.Width / 2 - symSize.Width / 2f;
pointF.Y = pointF.Y - fontSize.Height / 2 - symSize.Height / 2f;
break;
case masLabelPosition.LeftDownCorner:
pointF.X = pointF.X - fontSize.Width / 2 - symSize.Width / 2f;
pointF.Y = pointF.Y + fontSize.Height / 2 + symSize.Height / 2f;
break;
}
}
else
{
if (position == masLabelPosition.Center)
{
pointF.X = pointF.X - fontSize.Width / 2;
pointF.Y = pointF.Y - fontSize.Height / 2;
}
}
}
public void Draw(Matrix emptyRotateMatrix, Graphics g, LabelDef labelDef, ISymbol currentSymbol, Feature fet, QuickTransformArgs tranArgs)
{
string text = fet.GetFieldValue(labelDef.Fieldname);
if (string.IsNullOrEmpty(text) || labelDef.InvalidValue.Equals(text))
{
return;
}
Matrix oldMatrix = g.Transform;
LabelLocation[] locs = GetLabelLocations(fet, labelDef);
if (locs == null || locs.Length == 0)
{
return;
}
foreach (LabelLocation loc in locs)
{
//标注点在可视区域外
if (!_environment.ExtentOfProjectionCoord.IsContains(loc.Location))
{
continue;
}
//
pointF.X = (float)(loc.Location.X * tranArgs.kLon + tranArgs.bLon);
pointF.Y = (float)(loc.Location.Y * tranArgs.kLat + tranArgs.bLat);
#region debug
//符号中心点
//(_environment.ConflictorForLabel as PixelConflictor).DrawTestRectangleF(new PointF(pointF.X - 1, pointF.Y - 1), new SizeF(2, 2), Color.Blue);
#endregion
PointF oldPt = pointF;
SizeF fontSize = g.MeasureString(text, labelDef.LabelFont);
//计算标注矩形区域
SizeF labelRect = SizeF.Empty;
if (labelDef.AutoToNewline && text.Length > labelDef.CharcountPerLine)
{
int pos = (int)Math.Ceiling(text.Length / 2f);
labelRect = g.MeasureString(text.Substring(0, pos), labelDef.LabelFont);
labelRect.Height *= 2;
labelRect.Height = (float)Math.Ceiling(labelRect.Height);
}
else
{
labelRect = g.MeasureString(text, labelDef.LabelFont);
}
//应用冲突检测
masLabelPosition currentpos = labelDef.MasLabelRuler;
if (_conflictor != null && _conflictor.Enabled)
{
bool isConflicted = true;
PointF originalPt = pointF;
#region debug
//if (Array.IndexOf(fet.FieldValues, "东芝笔记本电脑技术服务中心") >= 0 || Array.IndexOf(fet.FieldValues, "甘托克") >= 0)
// Console.WriteLine("");
//画出8个候选位置
//foreach (masLabelPosition pos in Enum.GetValues(typeof(masLabelPosition)))
//{
// switch (pos)
// {
// case masLabelPosition.LeftCenter:
// case masLabelPosition.RightCenter:
// case masLabelPosition.UpCenter:
// case masLabelPosition.BottomCenter:
// pointF = originalPt;
// GetLabelLocation(pos, g, ref pointF, labelRect, currentSymbol);
// (_environment.ConflictorForLabel as PixelConflictor).DrawTestRectangleF(pointF, labelRect, Color.Blue);
// break;
// }
//}
#endregion
foreach (masLabelPosition pos in Enum.GetValues(typeof(masLabelPosition)))
{
pointF = originalPt;
GetLabelLocation(pos, g, ref pointF, labelRect, currentSymbol);
if (!_conflictor.IsConflicted(pointF, labelRect))
{
isConflicted = false;
currentpos = pos;
break;
}
}
if (isConflicted)
{
return;
}
}
else
{
//应用对齐方式
GetLabelLocation(labelDef.MasLabelRuler, g, ref pointF, fontSize, currentSymbol);
}
//
if (loc.Angle != 0 && loc.Angle != 360)//一般情况下是沿线标注
{
emptyRotateMatrix.Reset();
emptyRotateMatrix.RotateAt(loc.Angle, oldPt);
g.Transform = emptyRotateMatrix;
if (_conflictor != null)
{
_conflictor.HoldPosition(pointF.X, pointF.Y, labelRect, emptyRotateMatrix);
}
}
//背景符号
if (labelDef.ContainerSymbol != null)
{
SizeF backSize = labelDef.ContainerSymbol.Draw(g, pointF, fontSize);
if (backSize.Width - fontSize.Width > 0)
{
pointF.X += (backSize.Width - fontSize.Width) / 2f;
}
if (backSize.Height - fontSize.Height > 0)
{
pointF.Y += (backSize.Height - fontSize.Height) / 2f;
}
}
//写标注
DrawString(text, g, pointF, labelRect, labelDef);
//
if (loc.Angle != 0)
{
g.Transform = oldMatrix;
}
}
}
//<LabelDef enabled="False" field="ADMIN_NAME" fields="FIPS_ADMIN,GMI_ADMIN,ADMIN_NAME,FIPS_CNTRY,GMI_CNTRY,CNTRY_NAME,POP_ADMIN,TYPE_ENG,TYPE_LOC,SQKM,SQMI,COLOR_MAP" ruler="Center" invalidvalue="">
// <Font font="Microsoft Sans Serif,9,Regular" color="255,0,0,0" maskcolor="0,0,0,0" />
// <DisplayScaleRange enabled="False" minscale="-1" maxscale="1" />
//</LabelDef>
public static LabelDef FromXElement(XElement ele)
{
if (ele == null)
{
return(null);
}
enumLabelSource source = enumLabelSource.Label;
if (ele.Attribute("source") != null)
{
string sourceString = ele.Attribute("source").Value;
foreach (enumLabelSource s in Enum.GetValues(typeof(enumLabelSource)))
{
if (s.ToString() == sourceString)
{
source = s;
break;
}
}
}
Font font = FontHelper.StringToFont(ele.Element("Font").Attribute("font").Value);
ScaleRange range = ScaleRange.FromXElement(ele.Element("DisplayScaleRange"));
Color color = ColorHelper.StringToColor(ele.Element("Font").Attribute("color").Value);
Color maskcolor = ColorHelper.StringToColor(ele.Element("Font").Attribute("maskcolor").Value);
string field = ele.Attribute("field").Value;
string fields = ele.Attribute("fields").Value;
bool enabled = bool.Parse(ele.Attribute("enabled").Value);
bool autotonewline = false;
if (ele.Attribute("autotonewline") != null)
{
autotonewline = bool.Parse(ele.Attribute("autotonewline").Value);
}
int charcount = 6;
if (ele.Attribute("charcountperline") != null)
{
charcount = int.Parse(ele.Attribute("charcountperline").Value);
}
masLabelPosition ruler = masLabelPosition.Center;
string rulerstring = ele.Attribute("ruler").Value;
foreach (masLabelPosition r in Enum.GetValues(typeof(masLabelPosition)))
{
if (r.ToString() == rulerstring)
{
ruler = r;
break;
}
}
string invalidvalue = ele.Attribute("invalidvalue").Value;
//
IContainerSymbol csym = null;
if (ele.Element("ContainerSymbol") != null)
{
csym = PersistObject.ReflectObjFromXElement(ele.Element("ContainerSymbol")) as IContainerSymbol;
}
//
LabelDef def = new LabelDef(field, fields.Trim() != string.Empty ? fields.Split(',') : null);
def.LabelFont = font;
def.DisplayScaleRange = range;
def.EnableLabeling = enabled;
def.ForeColor = color;
def.MaskColor = maskcolor;
def.MasLabelRuler = ruler;
def.InvalidValue = invalidvalue;
def.LabelSource = source;
def.ContainerSymbol = csym;
def.AutoToNewline = autotonewline;
def.CharcountPerLine = charcount;
return(def);
}
