C# Класс TestShapeFile.ShapeDisplay

ShapeDisplay is a helper class for importing ESRI shapefiles and creating/displaying shapes on a WPF canvas. During the import step, a progress window is displayed. This is implemented using the WPF single-threaded programming model, which allows tasks to be executed by a Dispatcher instance while keeping the UI responsive.

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Открытые свойства

Свойство	Тип	Описание
Geos	List

Открытые методы

Метод	Описание
CancelReadShapeFile ( ) : void	Request the current shapefile read operation to be cancelled.
Pan ( double factorX, double factorY ) : void	Perform a panning operation given X and Y factor values which can be thought of as a fraction of the canvas actual width or height.
ReadShapeFile ( string fileName ) : void	Read shapes and attributes from the given shapefile.
ResetCanvas ( ) : void	Reset the canvas.
SaveToXaml ( Stream stream ) : void	Save the owner object (the main window) to XAML. This method may take a long time to run if there are many objects on the canvas (shapefile > 1 Mb).
ShapeDisplay ( Window owner, System.Windows.Controls.Canvas canvas ) : ESRI.ArcGIS.Client	Constructor for the ShapeDisplay class.
ShapeDisplay ( Window owner, GraphicsLayer layer ) : ESRI.ArcGIS.Client	Constructor for the ShapeDisplay class.
Zoom ( double zoomFactor ) : void	Perform a zoom operation about the current center of the canvas.

Приватные методы

Метод	Описание
CreatePathGeometry ( ShapeFileRecord record ) : System.Windows.Media.Geometry	Create a PathGeometry given a shapefile record.
CreateShapeBrushes ( double gradientFactor, double gradientAngle ) : void	Create a set of linear gradient brushes which we can use as a random pool for assignment to WPF shapes. A higher gradient factor results in a stronger gradient effect.
CreateShapeTransform ( ShapeFileReadInfo info ) : System.Windows.Media.TransformGroup	Computes a transformation so that the shapefile geometry will maximize the available space on the canvas and be perfectly centered as well.
CreateStreamGeometry ( ShapeFileRecord record ) : System.Windows.Media.Geometry	Create a StreamGeometry given a shapefile record.
CreateWPFPoint ( string shapeName, ShapeFileRecord record ) : System.Windows.Shapes.Shape	Create a WPF shape to represent a shapefile point or multipoint record.
CreateWPFShape ( string shapeName, ShapeFileRecord record ) : System.Windows.Shapes.Shape	Create a WPF shape given a shapefile record.
DisplayLonLatCoord ( Point canvasPosition ) : void	Given a canvas position, display the corresponding lon/lat coordinates on the canvas.
DisplayLonLatDefault ( ) : void	Display some default text in the lon/lat label.
DisplayNextShapeRecord ( ShapeFileReadInfo info ) : void	Display a block of shape records as WPF shapes, and schedule the next display with the dispatcher if needed.
DisplayShapes ( ShapeFileReadInfo info ) : void	Begin creating and displaying WPF shapes on the canvas.
EndReadShapeFile ( ) : void	Perform some cleanup at the end of reading a shapefile.
EndReadShapeFile ( ShapeFileReadInfo info ) : void	Perform some cleanup at the end of reading a shapefile.
GetAdjustedColor ( Color inColor, double factor ) : Color	Given an input color, return an adjusted color using a factor value which ranges from 0 to 1. The larger the factor, the lighter the adjusted color. A factor of 0 means no adjustment to the input color. Note that the alpha component of the input color is not adjusted.
GetLonLatCoordinates ( Point canvasPosition ) : Point	Given a canvas position, convert it to a longitude and latitude coordinate.
GetLonLatDisplayText ( Point lonLat ) : string	Given a lon/lat coordinate, determine the corresponding display text.
GetRandomShapeBrush ( ) : System.Windows.Media.Brush	Get the next brush that can be used to fill a WPF shape.
HideProgress ( ) : void	Hide the progress window.
ReadDbaseAttributes ( ShapeFileReadInfo info ) : void	Read dBASE file attributes.
ReadNextShapeRecord ( ShapeFileReadInfo info ) : void	Read a block of shape file records and possibly schedule the next read with the dispatcher.
ShowProgress ( string progressText, double progressValue ) : void	Show the progress window with the given progress value.
canvas_MouseDown ( object sender, System.Windows.Input.MouseButtonEventArgs e ) : void	Handle the MouseDown event for the canvas.
canvas_MouseEnter ( object sender, System.Windows.Input.MouseEventArgs e ) : void	Handle the MouseEnter event for the canvas.
canvas_MouseLeave ( object sender, System.Windows.Input.MouseEventArgs e ) : void	Handle the MouseLeave event for the canvas.
canvas_MouseMove ( object sender, System.Windows.Input.MouseEventArgs e ) : void	Handle the MouseMove event for the canvas.
canvas_MouseUp ( object sender, System.Windows.Input.MouseButtonEventArgs e ) : void	Handle the MouseUp event for the canvas.
progressWindow_Cancel ( object sender, CancelEventArgs e ) : void	Handle the Cancel button being pressed in the progress window.
progressWindow_Closed ( object sender, EventArgs e ) : void	Handle closing of the progress window.

Описание методов

CancelReadShapeFile() публичный Метод

Request the current shapefile read operation to be cancelled.

public CancelReadShapeFile ( ) : void
Результат	void

Pan() публичный Метод

Perform a panning operation given X and Y factor values which can be thought of as a fraction of the canvas actual width or height.

public Pan ( double factorX, double factorY ) : void
factorX	double	Fraction of canvas actual width to pan horizontally.
factorY	double	Fraction of canvas actual height to pan vertically.
Результат	void

ReadShapeFile() публичный Метод

Read shapes and attributes from the given shapefile.

public ReadShapeFile ( string fileName ) : void
fileName	string	Full pathname of a shapefile.
Результат	void

ResetCanvas() публичный Метод

Reset the canvas.

public ResetCanvas ( ) : void
Результат	void

SaveToXaml() публичный Метод

Save the owner object (the main window) to XAML. This method may take a long time to run if there are many objects on the canvas (shapefile > 1 Mb).

public SaveToXaml ( Stream stream ) : void
stream	Stream	Output stream for writing the XAML.
Результат	void

ShapeDisplay() публичный Метод

Constructor for the ShapeDisplay class.

public ShapeDisplay ( Window owner, System.Windows.Controls.Canvas canvas ) : ESRI.ArcGIS.Client
owner	System.Windows.Window	Window that acts as an owner to child windows.
canvas	System.Windows.Controls.Canvas	The canvas on which to create WPF shapes.
Результат	ESRI.ArcGIS.Client

ShapeDisplay() публичный Метод

Constructor for the ShapeDisplay class.

public ShapeDisplay ( Window owner, GraphicsLayer layer ) : ESRI.ArcGIS.Client
owner	System.Windows.Window	Window that acts as an owner to child windows.
layer	GraphicsLayer
Результат	ESRI.ArcGIS.Client

Zoom() публичный Метод

Perform a zoom operation about the current center of the canvas.

public Zoom ( double zoomFactor ) : void
zoomFactor	double	Zoom multiplication factor (1, 2, 4, etc).
Результат	void

Описание свойств

Geos публичное свойство

public List Geos
Результат	List