WpfDrawingGeoCanvas¶

Namespace: ThinkGeo.UI.Wpf

WPF implementation of GeoCanvas that uses a GeoGraphicsView for drawing. Implements IGeoCanvasRotatable to support rotation of drawing operations.

public class WpfDrawingGeoCanvas : ThinkGeo.Core.GeoCanvas, ThinkGeo.Core.IGeoCanvasRotatable

Inheritance Object → GeoCanvas → WpfDrawingGeoCanvas
Implements IGeoCanvasRotatable

Properties¶

RotationAngle¶

public double RotationAngle { get; set; }

Property Value¶

Double

PivotX¶

public double PivotX { get; set; }

Property Value¶

Double

PivotY¶

public double PivotY { get; set; }

Property Value¶

Double

ScaleFactor¶

public float ScaleFactor { get; }

Property Value¶

Single

CurrentScale¶

public double CurrentScale { get; }

Property Value¶

Double

FontDisplayDensity¶

public double FontDisplayDensity { get; }

Property Value¶

Double

DrawingQuality¶

public DrawingQuality DrawingQuality { get; set; }

Property Value¶

DrawingQuality

MapUnit¶

public GeographyUnit MapUnit { get; }

Property Value¶

GeographyUnit

Width¶

public float Width { get; protected set; }

Property Value¶

Single

Height¶

public float Height { get; protected set; }

Property Value¶

Single

CurrentWorldExtent¶

public RectangleShape CurrentWorldExtent { get; protected set; }

Property Value¶

RectangleShape

SupportKeyColor¶

public bool SupportKeyColor { get; }

Property Value¶

Boolean

KeyColors¶

public Collection<GeoColor> KeyColors { get; }

Property Value¶

Collection<GeoColor>

NativeImage¶

public object NativeImage { get; }

Property Value¶

Object

IsDrawing¶

public bool IsDrawing { get; protected set; }

Property Value¶

Boolean

Dpi¶

public float Dpi { get; set; }

Property Value¶

Single

CancellationToken¶

public CancellationToken CancellationToken { get; set; }

Property Value¶

CancellationToken

ClippingArea¶

public RectangleShape ClippingArea { get; set; }

Property Value¶

RectangleShape

Constructors¶

WpfDrawingGeoCanvas()¶

public WpfDrawingGeoCanvas()

Methods¶

DrawArcCore(GeoPen, Single, Single, Single, Single, Single, Single, DrawingLevel)¶

Draws an arc. (Not implemented)

protected void DrawArcCore(GeoPen pen, float x, float y, float width, float height, float startAngle, float sweepAngle, DrawingLevel drawingLevel)

Parameters¶

pen GeoPen

x Single

y Single

width Single

height Single

startAngle Single

sweepAngle Single

drawingLevel DrawingLevel

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

Draws a filled/stroked polygon (area) by transforming each set of points.

protected void DrawAreaCore(IEnumerable<ScreenPointF[]> screenPoints, GeoPen outlinePen, GeoBrush fillBrush, DrawingLevel drawingLevel, float xOffset, float yOffset, PenBrushDrawingOrder penBrushDrawingOrder)

Parameters¶

screenPoints IEnumerable<ScreenPointF[]>

outlinePen GeoPen

fillBrush GeoBrush

drawingLevel DrawingLevel

xOffset Single

yOffset Single

penBrushDrawingOrder PenBrushDrawingOrder

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

Draws a polyline by applying rotation to the provided screen points.

protected void DrawLineCore(IEnumerable<ScreenPointF> screenPoints, GeoPen linePen, DrawingLevel drawingLevel, float xOffset, float yOffset)

Parameters¶

screenPoints IEnumerable<ScreenPointF>

linePen GeoPen

drawingLevel DrawingLevel

xOffset Single

yOffset Single

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

Draws an ellipse at the given screen point.

protected void DrawEllipseCore(ScreenPointF screenPoint, float width, float height, GeoPen outlinePen, GeoBrush fillBrush, DrawingLevel drawingLevel, float xOffset, float yOffset, PenBrushDrawingOrder penBrushDrawingOrder)

Parameters¶

screenPoint ScreenPointF

width Single

height Single

outlinePen GeoPen

fillBrush GeoBrush

drawingLevel DrawingLevel

xOffset Single

yOffset Single

penBrushDrawingOrder PenBrushDrawingOrder

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

Draws an image without scaling. (Not implemented)

protected void DrawScreenImageWithoutScalingCore(GeoImage image, float centerXInScreen, float centerYInScreen, DrawingLevel drawingLevel, float xOffset, float yOffset, float rotateAngle)

Parameters¶

image GeoImage

centerXInScreen Single

centerYInScreen Single

drawingLevel DrawingLevel

xOffset Single

yOffset Single

rotateAngle Single

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

Draws an image with scaling. (Not implemented)

protected void DrawScreenImageCore(GeoImage image, float centerXInScreen, float centerYInScreen, float widthInScreen, float heightInScreen, DrawingLevel drawingLevel, float xOffset, float yOffset, float rotateAngle)

Parameters¶

image GeoImage

centerXInScreen Single

centerYInScreen Single

widthInScreen Single

heightInScreen Single

drawingLevel DrawingLevel

xOffset Single

yOffset Single

rotateAngle Single

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

Draws text by delegating to the GeoGraphicsView.

protected void DrawTextCore(string text, GeoFont font, GeoBrush fillBrush, GeoPen haloPen, IEnumerable<ScreenPointF> textPathInScreen, DrawingLevel drawingLevel, float xOffset, float yOffset, DrawingTextAlignment drawingTextAlignment, float rotateAngle)

Parameters¶

text String

font GeoFont

fillBrush GeoBrush

haloPen GeoPen

textPathInScreen IEnumerable<ScreenPointF>

drawingLevel DrawingLevel

xOffset Single

yOffset Single

drawingTextAlignment DrawingTextAlignment

rotateAngle Single

MeasureTextCore(String, GeoFont)¶

Estimates the size of text using a basic heuristic.

protected DrawingRectangleF MeasureTextCore(string text, GeoFont font)

Parameters¶

text String

font GeoFont

Returns¶

DrawingRectangleF

BeginDrawingCore(Object, RectangleShape, GeographyUnit)¶

Begins a drawing session by initializing the GeoGraphicsView.

protected void BeginDrawingCore(object nativeImage, RectangleShape worldExtent, GeographyUnit drawingMapUnit)

Parameters¶

nativeImage Object

worldExtent RectangleShape

drawingMapUnit GeographyUnit

GetCanvasWidthCore()¶

This returns the virtual width (instead of physical width) of the canvas, the scale factor of this geoCanvas is always 1.

protected float GetCanvasWidthCore()

Returns¶

Single

GetCanvasHeightCore()¶

This returns the virtual height (instead of physical height) of the canvas, the scale factor of this geoCanvas is always 1.

protected float GetCanvasHeightCore()

Returns¶

Single

EndDrawingCore()¶

Ends the drawing session.

protected void EndDrawingCore()

FlushCore()¶

Flushes any pending drawing operations.

protected void FlushCore()

Events¶

DrawingProgressChanged¶

public event EventHandler<DrawingProgressChangedEventArgs> DrawingProgressChanged;