C# 클래스 SharpMap.Rendering.Thematics.GradientTheme

상속: SharpMap.Rendering.Thematics.GradientThemeBase

파일 보기 프로젝트 열기: jumpinjackie/fdotoolbox 1 사용 예제들

공개 메소드들

메소드	설명
GetStyle ( SharpMap row ) : SharpMap.Styles.IStyle	Returns the style based on a numeric DataColumn, where style properties are linearly interpolated between max and min values.
GradientTheme ( string columnName, double minValue, double maxValue, SharpMap minStyle, SharpMap maxStyle ) : System	Initializes a new instance of the GradientTheme class The gradient theme interpolates linearly between two styles based on a numerical attribute in the datasource. This is useful for scaling symbols, line widths, line and fill colors from numerical attributes. Colors are interpolated between two colors, but if you want to interpolate through more colors (fx. a rainbow), set the TextColorBlend, LineColorBlend and FillColorBlend properties to a custom ColorBlend. The following properties are scaled (properties not mentioned here are not interpolated): PropertyRemarks System.Drawing.ColorRed, Green, Blue and Alpha values are linearly interpolated. System.Drawing.PenThe color, width, color of pens are interpolated. MiterLimit,StartCap,EndCap,LineJoin,DashStyle,DashPattern,DashOffset,DashCap,CompoundArray, and Alignment are switched in the middle of the min/max values. System.Drawing.SolidBrushSolidBrush color are interpolated. Other brushes are not supported. SharpMap.Styles.VectorStyleMaxVisible, MinVisible, Line, Outline, Fill and SymbolScale are scaled linearly. Symbol, EnableOutline and Enabled switch in the middle of the min/max values. SharpMap.Styles.LabelStyleFontSize, BackColor, ForeColor, MaxVisible, MinVisible, Offset are scaled linearly. All other properties use min-style. Creating a rainbow colorblend showing colors from red, through yellow, green and blue depicting the population density of a country. //Create two vector styles to interpolate between SharpMap.Styles.VectorStyle min = new SharpMap.Styles.VectorStyle(); SharpMap.Styles.VectorStyle max = new SharpMap.Styles.VectorStyle(); min.Outline.Width = 1f; //Outline width of the minimum value max.Outline.Width = 3f; //Outline width of the maximum value //Create a theme interpolating population density between 0 and 400 SharpMap.Rendering.Thematics.GradientTheme popdens = new SharpMap.Rendering.Thematics.GradientTheme("PopDens", 0, 400, min, max); //Set the fill-style colors to be a rainbow blend from red to blue. popdens.FillColorBlend = SharpMap.Rendering.Thematics.ColorBlend.Rainbow5; myVectorLayer.Theme = popdens;

비공개 메소드들

메소드	설명
CalculateLabelStyle ( SharpMap min, SharpMap max, double value ) : LabelStyle
CalculateVectorStyle ( SharpMap min, SharpMap max, double value ) : VectorStyle
Fraction ( double attr ) : double
InterpolateBool ( bool min, bool max, double attr ) : bool
InterpolateBrush ( System min, System max, double attr ) : System.Drawing.SolidBrush
InterpolateColor ( System minCol, System maxCol, double attr ) : System.Drawing.Color
InterpolateDouble ( double min, double max, double attr ) : double
InterpolateFloat ( float min, float max, double attr ) : float
InterpolatePen ( System min, System max, double attr ) : System.Drawing.Pen

메소드 상세

GetStyle() 공개 메소드

Returns the style based on a numeric DataColumn, where style properties are linearly interpolated between max and min values.

public GetStyle ( SharpMap row ) : SharpMap.Styles.IStyle
row	SharpMap	Feature
리턴	SharpMap.Styles.IStyle

GradientTheme() 공개 메소드

Initializes a new instance of the GradientTheme class

The gradient theme interpolates linearly between two styles based on a numerical attribute in the datasource. This is useful for scaling symbols, line widths, line and fill colors from numerical attributes.

Colors are interpolated between two colors, but if you want to interpolate through more colors (fx. a rainbow), set the TextColorBlend, LineColorBlend and FillColorBlend properties to a custom ColorBlend.

The following properties are scaled (properties not mentioned here are not interpolated): PropertyRemarks System.Drawing.ColorRed, Green, Blue and Alpha values are linearly interpolated. System.Drawing.PenThe color, width, color of pens are interpolated. MiterLimit,StartCap,EndCap,LineJoin,DashStyle,DashPattern,DashOffset,DashCap,CompoundArray, and Alignment are switched in the middle of the min/max values. System.Drawing.SolidBrushSolidBrush color are interpolated. Other brushes are not supported. SharpMap.Styles.VectorStyleMaxVisible, MinVisible, Line, Outline, Fill and SymbolScale are scaled linearly. Symbol, EnableOutline and Enabled switch in the middle of the min/max values. SharpMap.Styles.LabelStyleFontSize, BackColor, ForeColor, MaxVisible, MinVisible, Offset are scaled linearly. All other properties use min-style.

Creating a rainbow colorblend showing colors from red, through yellow, green and blue depicting the population density of a country.

 //Create two vector styles to interpolate between SharpMap.Styles.VectorStyle min = new SharpMap.Styles.VectorStyle(); SharpMap.Styles.VectorStyle max = new SharpMap.Styles.VectorStyle(); min.Outline.Width = 1f; //Outline width of the minimum value max.Outline.Width = 3f; //Outline width of the maximum value //Create a theme interpolating population density between 0 and 400 SharpMap.Rendering.Thematics.GradientTheme popdens = new SharpMap.Rendering.Thematics.GradientTheme("PopDens", 0, 400, min, max); //Set the fill-style colors to be a rainbow blend from red to blue. popdens.FillColorBlend = SharpMap.Rendering.Thematics.ColorBlend.Rainbow5; myVectorLayer.Theme = popdens;

public GradientTheme ( string columnName, double minValue, double maxValue, SharpMap minStyle, SharpMap maxStyle ) : System
columnName	string	Name of column to extract the attribute
minValue	double	Minimum value
maxValue	double	Maximum value
minStyle	SharpMap	Color for minimum value
maxStyle	SharpMap	Color for maximum value
리턴	System