Table of Contents

ThinkGeo.MapSuite.iOSEdition.CGGeoCanvas

Note: The page was created before Map Suite 10. Map Suite 10.0 organized many classes into new namespaces and assemblies as well as had a few minor breaks in compatibility. The majority of previously built code should work without modification assuming the new namespaces are added. For guidance on upgrading your existing code, please check out MapSuite 10 Upgrade Guide.

This class represents a iOS canvas that is used to draw geographic shapes in iOS platform.

Inheritance Hierarchy

Members Summary

Public Constructors

CGGeoCanvas()

Initializes a new instance of the class.

Remarks

None

Parameters

Protected Constructors

Public Methods

GetStreamFromGeoImage(GeoImage)

Get the stream from the passed-in GeoImage. This API is an abstract API and will be implemented in each concrete sub-class.

Remarks

N/A

Return Value
Parameters

Flush()

N/A

Remarks

N/A

Return Value
Parameters

CloneDeep()

N/A

Remarks

N/A

Return Value
Parameters

Clear(GeoBrush)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(Feature,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(AreaBaseShape,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(Feature,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(AreaBaseShape,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(Feature,GeoPen,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(AreaBaseShape,GeoPen,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(Feature,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(AreaBaseShape,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawArea(IEnumerable<ScreenPointF[]>,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawLine(Feature,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawLine(LineBaseShape,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawLine(Feature,GeoPen,DrawingLevel,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawLine(LineBaseShape,GeoPen,DrawingLevel,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawLine(IEnumerable<ScreenPointF>,GeoPen,DrawingLevel,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(Feature,Single,Single,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(PointBaseShape,Single,Single,GeoPen,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(Feature,Single,Single,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(PointBaseShape,Single,Single,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(Feature,Single,Single,GeoPen,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(PointBaseShape,Single,Single,GeoPen,GeoBrush,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(Feature,Single,Single,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(PointBaseShape,Single,Single,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipse(ScreenPointF,Single,Single,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

N/A

Remarks

N/A

Return Value
Parameters

DrawWorldImageWithoutScaling(GeoImage,Double,Double,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawWorldImageWithoutScaling(GeoImage,Double,Double,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawScreenImageWithoutScaling(GeoImage,Single,Single,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawWorldImage(GeoImage,Double,Double,Single,Single,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawWorldImage(GeoImage,Double,Double,Double,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawWorldImage(GeoImage,Double,Double,Single,Single,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawScreenImage(GeoImage,Single,Single,Single,Single,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawTextWithScreenCoordinate(String,GeoFont,GeoBrush,Single,Single,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawTextWithScreenCoordinate(String,GeoFont,GeoBrush,GeoPen,Single,Single,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawTextWithWorldCoordinate(String,GeoFont,GeoBrush,Double,Double,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawTextWithWorldCoordinate(String,GeoFont,GeoBrush,GeoPen,Double,Double,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawText(String,GeoFont,GeoBrush,IEnumerable<ScreenPointF>,DrawingLevel)

N/A

Remarks

N/A

Return Value
Parameters

DrawText(String,GeoFont,GeoBrush,GeoPen,IEnumerable<ScreenPointF>,DrawingLevel,Single,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

MeasureText(String,GeoFont)

N/A

Remarks

N/A

Return Value
Parameters

BeginDrawing(Object,RectangleShape,GeographyUnit)

N/A

Remarks

N/A

Return Value
Parameters

ToNativeImage(GeoImage)

N/A

Remarks

N/A

Return Value
Parameters

ToGeoImage(Object)

N/A

Remarks

N/A

Return Value
Parameters

EndDrawing()

N/A

Remarks

N/A

Return Value
Parameters

ToString()

N/A

Remarks

N/A

Return Value
Parameters

Equals(Object)

N/A

Remarks

N/A

Return Value
Parameters

GetHashCode()

N/A

Remarks

N/A

Return Value
Parameters

GetType()

N/A

Remarks

N/A

Return Value
Parameters

Protected Methods

BeginDrawingCore(Object,RectangleShape,GeographyUnit)

This method begins the act of drawing on the GeoCanvas.

Remarks

This is the first method that needs to be called before any drawing takes place. Calling this method will set the IsDrawing property to true. When you finish drawing, you must call EndDrawing to commit the changes to the image.

Return Value
Parameters

ToNativeImageCore(GeoImage)

This method converts a GeoImage to a commonly-used object. In GdiPlus, this object is often a NativeImage.

Remarks

This method is a BaseClass API and will be used in its sub-concrete classes.

Return Value
Parameters

FlushCore()

This method flush drawing and commits the drawing on the GeoCanvas.

Remarks

This method should be called when you are finished drawing. It will commit the image changes to the image you passed in on BeginDrawing. It will also set IsDrawing to false. After you call this method it will put the GeoCanvas into an invalid state, so if you then call any drawing methods it will raise an exception.

Return Value
Parameters

ClearCore(GeoBrush)

This method clears the current GeoCanvas using the color specified.

Remarks

Use this method to clear the GeoCanvas.This method is designed to be overridden by the deriving class.

Return Value
Parameters

EndDrawingCore()

This method ends drawing and commits the drawing on the GeoCanvas.

Remarks

This methods should be called when you are finished drawing. It will commit the image changes to the image you passed in on BeginDrawing. It will also set IsDrawing to false. After you call this method it will put the GeoCanvas into an invalid state, so if you then call any drawing methods it will raise an exception.

Return Value
Parameters

DrawAreaCore(IEnumerable<ScreenPointF[]>,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

This method draws an area on the GeoCanvas.

Remarks

This method is used to draw on the GeoCanvas. It provides you with a number of overloads that allow you to control how things are drawn. Specify the GeoBrush to fill in an area. Specify the GeoPen to outline an area using that GeoPen. You can also call an overload that will allow you to specify both a GeoPen and a GeoBrush.The DrawingLevel allows you to specify the level you will draw on when you are drawing multiple areas. This is very useful when you want to draw a drop shadow, for example. In that case, you could draw the black backdrop on the lowest level with an offset, then draw the normal shape on a higher level without an offset.

Return Value
Parameters

DrawLineCore(IEnumerable<ScreenPointF>,GeoPen,DrawingLevel,Single,Single)

N/A

Remarks

N/A

Return Value
Parameters

DrawEllipseCore(ScreenPointF,Single,Single,GeoPen,GeoBrush,DrawingLevel,Single,Single,PenBrushDrawingOrder)

Draws a point on the GeoCanvas.

Remarks

This method is used to draw a point on the GeoCanvas. It provides you with a number of overloads that allow you to control how it is drawn. Specify the GeoBrush to fill in the area of the point. Specify the GeoPen to outline the point using that GeoPen. You can also call a overload that will allow you to specify both a GeoPen and a GeoBrush.The DrawingLevel allows you to specify the level you will draw on when drawing many points.

Return Value
Parameters

DrawScreenImageWithoutScalingCore(GeoImage,Single,Single,DrawingLevel,Single,Single,Single)

Draws an unscaled image on the GeoCanvas.

Remarks

Drawing an image unscaled is faster than using the API that scales it.

Return Value
Parameters

DrawScreenImageCore(GeoImage,Single,Single,Single,Single,DrawingLevel,Single,Single,Single)

Draws a scaled image on the GeoCanvas.

Remarks

Drawing an image scaled is slower than using the API that draws it unscaled.

Return Value
Parameters

DrawTextCore(String,GeoFont,GeoBrush,GeoPen,IEnumerable<ScreenPointF>,DrawingLevel,Single,Single,Single)

This method allows you to draw text at the specified location, using the specified brush and font parameters.

Remarks

This method is used to draw text on the GeoCanvas.The DrawingLevel allows you to specify the level you will draw on when drawing multiple text items. This is very useful when you want to draw a drop shadow, for example. You can draw the black backdrop on the lowest level with an offset, then draw the normal text on a higher level without an offset.

Return Value
Parameters

MeasureTextCore(String,GeoFont)

This method returns the rectangle that contains the specified text, when that text is drawn with the specified font.

Remarks

This method is typically used for labeling, to determine whether labels overlap.

Return Value
Parameters

GetCanvasWidthCore(Object)

This method gets the canvas width of the passed-in native image object.

Remarks

This method is a BaseClass API and will be implemented and used in its sub-concrete classes.

Return Value
Parameters

GetCanvasHeightCore(Object)

This method gets the canvas height of the passed-in native image object.

Remarks

This method is a BaseClass API and will be implemented and used in its sub-concrete classes.

Return Value
Parameters

ToGeoImageCore(Object)

This method converts an oboject to a GeoImage. In GdiPlus, this object is often a NativeImage.

Remarks

This method is a BaseClass API and will be implemented and used in its sub-concrete classes.

Return Value
Parameters

DrawException(String)

N/A

Remarks

N/A

Return Value
Parameters

DrawFullWaterMarked(String)

N/A

Remarks

N/A

Return Value
Parameters

OnDrawingProgressChanged(DrawingProgressChangedEventArgs)

N/A

Remarks

N/A

Return Value
Parameters

ToWorldCoordinate(DrawingRectangleF)

N/A

Remarks

N/A

Return Value
Parameters

CloneDeepCore()

N/A

Remarks

N/A

Return Value
Parameters

GetCanvasWidth(Object)

N/A

Remarks

N/A

Return Value
Parameters

GetCanvasHeight(Object)

N/A

Remarks

N/A

Return Value
Parameters

DrawEvalWaterMarked(String)

N/A

Remarks

N/A

Return Value
Parameters

Finalize()

N/A

Remarks

N/A

Return Value
Parameters

MemberwiseClone()

N/A

Remarks

N/A

Return Value
Parameters

Public Properties

ClippingArea

N/A

Remarks

N/A

Return Value

CurrentScale

N/A

Remarks

N/A

Return Value

DrawingQuality

N/A

Remarks

N/A

Return Value

MapUnit

N/A

Remarks

N/A

Return Value

Width

N/A

Remarks

N/A

Return Value

Height

N/A

Remarks

N/A

Return Value

CurrentWorldExtent

N/A

Remarks

N/A

Return Value

HasKeyColor

N/A

Remarks

N/A

Return Value

KeyColors

N/A

Remarks

N/A

Return Value

NativeImage

N/A

Remarks

N/A

Return Value

IsDrawing

N/A

Remarks

N/A

Return Value

Dpi

N/A

Remarks

N/A

Return Value

Protected Properties

HasDrawn

N/A

Remarks

N/A

Return Value

Public Events

DrawingProgressChanged N/A

Remarks

N/A

Event Arguments:DrawingProgressChangedEventArgs