private void CreateLegendScheme(LegendType aLT, string fieldName)
{
if (_ifCreateLegendScheme)
{
double min, max;
ShapeTypes aST = _legendScheme.ShapeType;
min = _legendScheme.MinValue;
max = _legendScheme.MaxValue;
switch (aLT)
{
case LegendType.SingleSymbol:
Color aColor = Color.Black;
switch (aST)
{
case ShapeTypes.Point:
aColor = Color.Black;
break;
case ShapeTypes.Polyline:
case ShapeTypes.PolylineZ:
aColor = Color.Black;
break;
case ShapeTypes.Polygon:
case ShapeTypes.Image:
aColor = Color.FromArgb(255, 251, 195);
break;
}
Single size = 0.1F;
if (_legendScheme.ShapeType == ShapeTypes.Point)
{
size = 5;
}
_legendScheme = LegendManage.CreateSingleSymbolLegendScheme(_legendScheme.ShapeType, aColor,
size);
TSB_Add.Enabled = false;
TSB_Del.Enabled = false;
TSB_DelAll.Enabled = false;
TSB_Down.Enabled = false;
TSB_Up.Enabled = false;
TSB_MakeBreaks.Enabled = false;
TSB_Reverse.Enabled = false;
break;
case LegendType.UniqueValue:
Color[] colors;
List <string> valueList = new List <string>();
VectorLayer aLayer = (VectorLayer)_mapLayer;
bool isDateField = false;
Type colType = aLayer.AttributeTable.Table.Columns[fieldName].DataType;
if (colType == typeof(DateTime))
{
isDateField = true;
}
List <string> captions = new List <string>();
for (int i = 0; i < aLayer.AttributeTable.Table.Rows.Count; i++)
{
if (!valueList.Contains(aLayer.AttributeTable.Table.Rows[i][fieldName].ToString()))
{
valueList.Add(aLayer.AttributeTable.Table.Rows[i][fieldName].ToString());
if (isDateField)
{
captions.Add(((DateTime)aLayer.AttributeTable.Table.Rows[i][fieldName]).ToString("yyyy/M/d"));
}
}
}
if (valueList.Count == 1)
{
MessageBox.Show("The values of all shapes are same!", "Alarm");
break;
}
if (valueList.Count <= 13)
{
colors = LegendManage.CreateRainBowColors(valueList.Count);
}
else
{
colors = LegendManage.CreateRandomColors(valueList.Count);
}
List <Color> CList = new List <Color>(colors);
CList.Insert(0, Color.White);
colors = CList.ToArray();
if (isDateField)
{
_legendScheme = LegendManage.CreateUniqValueLegendScheme(valueList, captions, colors, aST, min,
max, _legendScheme.HasNoData, _legendScheme.MissingValue);
}
else
{
_legendScheme = LegendManage.CreateUniqValueLegendScheme(valueList, colors,
aST, min, max, _legendScheme.HasNoData, _legendScheme.MissingValue);
}
_legendScheme.FieldName = fieldName;
TSB_Add.Enabled = true;
TSB_Del.Enabled = true;
TSB_DelAll.Enabled = true;
TSB_Down.Enabled = true;
TSB_Up.Enabled = true;
TSB_MakeBreaks.Enabled = true;
TSB_Reverse.Enabled = true;
break;
case LegendType.GraduatedColor:
aLayer = (VectorLayer)_mapLayer;
double[] S = new double[aLayer.AttributeTable.Table.Rows.Count];
for (int i = 0; i < S.Length; i++)
{
S[i] = double.Parse(aLayer.AttributeTable.Table.Rows[i][fieldName].ToString());
}
MIMath.GetMaxMinValue(S, _legendScheme.MissingValue, ref min, ref max);
if (min == max)
{
MessageBox.Show("The values of all shapes are same!", "Alarm");
break;
}
double[] CValues;
CValues = LegendManage.CreateContourValues(min, max);
colors = LegendManage.CreateRainBowColors(CValues.Length + 1);
_legendScheme = LegendManage.CreateGraduatedLegendScheme(CValues, colors,
aST, min, max, _legendScheme.HasNoData, _legendScheme.MissingValue);
_legendScheme.FieldName = fieldName;
TSB_Add.Enabled = true;
TSB_Del.Enabled = true;
TSB_DelAll.Enabled = true;
TSB_Down.Enabled = true;
TSB_Up.Enabled = true;
TSB_MakeBreaks.Enabled = true;
TSB_Reverse.Enabled = true;
break;
}
//ShowLegendScheme(_legendScheme);
//DataGridView1.Refresh();
legendView1.LegendScheme = _legendScheme;
legendView1.Invalidate();
}
}
