Display a continuous S-57 vector chart via a Win32 Device Context. More...

import"encxcom.idl";

Inheritance diagram for ENCX::S57Draw:

[legend]

Public Member Functions
HRESULT	SetManager ([in] IS57Manager *pMgr)
	Connect to a SENC. All the S-57 data to be drawn on the device context will be obtained from pMgr. More...

HRESULT	Draw ([in] OLE_HANDLE lHDC)
	Draw the chart to the specified device context. More...

HRESULT	SetDisplayScale ([in] LONG nDisplayScale, [in] IPixelPoint *ipPixelPt)
	Set the nominal scale of the chart. Suitable for display to the user, but not for precise calculations. More...

HRESULT	CalculateNewDisplayScale ([out] VARIANT_BOOL pbAllowed, [out] LONG pnScaleOut, [in] LONG nScaleOld, [in] LONG nChange, [in] LONG nSmallestChangeAllowed)
	Obtain the sensible next scale in the specified direction. More...

HRESULT	SetDrawLayerCallback ([in] enum S57CallBackDrawAction callBackDrawAction, [in] IS57ProductAndUsage *iproductAndUsage, [in] BYTE Layer)
	Insert a callback into the drawing sequence. More...

HRESULT	SetPosition ([in] IGeoPoint geoPt, [in] IPixelPoint pixelPt, [out, retval] VARIANT_BOOL *bRes)
	Set the geographical position at the specified pixel position on the drawing surface. More...

HRESULT	SetPositionAndScale ([in] IGeoRect geoRect, [out, retval] VARIANT_BOOL bRes)
	Set the geographical position and scale so that the specified rectangle just fits on the drawing surface. More...

HRESULT	SetDirectionOfUp ([in] DOUBLE degrees, [in] IPixelPoint ipPixelPt, [out, retval] VARIANT_BOOL pVal)
	The geographical orientation of the drawing surface. More...

HRESULT	FeaturesAtPoint ([in] IPixelPoint pixelPt, [out, retval] IS57DrawnFeatures *pVal)

HRESULT	AdjustAreaSymbolOffsets ([in] LONG cx, [in] LONG cy)
	Call with the offset of each scrolling action. More...

HRESULT	SetPositionAndScaleExact ([in] IGeoRect geoRect, [out, retval] VARIANT_BOOL bRes)
	Set the geographical position and scale so that the specified rectangle exactly. The corners of the drawing surface will correspond to the corners of the GeoRect. Use with caution - this method allows you to create some unlikely shaped charts! More...

HRESULT	GetSize ([out, retval] IPixelSize **sz)
	The area inside the rectangle (0,0) to (Size.Width,Size.Height) will be drawn. More...

HRESULT	SetSize ([in] IPixelSize *sz)
	The area inside the rectangle (0,0) to (Size.Width,Size.Height) will be drawn. More...

HRESULT	DepthAtPoint ([in] IPixelPoint pixelPt, [out] DOUBLE depthInMetres, [out, retval] VARIANT_BOOL *succeeded)
	Get the depth at a pixel position within the view. More...

HRESULT	HighlightFeature ([in] IS57FeatureIdentifier *featureId, [in] VARIANT_BOOL bClear)
	Highlight the feature (true to clear existing highlights, false to add the feature to the ones already highlighted) More...

HRESULT	HighlightSounding ([in] IS57FeatureIdentifier *featureId, [in] double depthMetres, [in] VARIANT_BOOL bClear)
	Highlight the sounding (true to clear existing highlights, false to add the sounding to the ones already highlighted) More...

HRESULT	SetVPFManager ([in] IVPFManager *pMgr)
	Connect to a VPF chart folder. All the VPF data to be drawn on the device context will be obtained from pMgr. More...

HRESULT	VPFFeaturesAtPoint ([in] IPixelPoint pixelPt, [out, retval] BSTR pXML)
	Return XML describing the VPF features at a specified point. More...

HRESULT	VPFCoveragesAtPoint ([in] IPixelPoint pixelPt, [out, retval] BSTR pXML)
	Return XML describing the VPF coverages at a specified point. More...

HRESULT	OnDrawLayer (OLE_HANDLE hdc, enum S57CallBackDrawAction action, IS57ProductAndUsage *ProductAndUsage, BYTE Layer)
	Occurs before or after an S-57 layer is drawn. More...

Properties
LONG	DisplayScale `[get]`
	The nominal scale of the chart. Suitable for display to the user, but not for precise calculations. More...

IGeoPix	GeoPix `[get]`
	Obtain the geopix. More...

IGeoPoint	PositionOfCentre `[get]`
	Obtain the geographical position of the centre of the drawing surface. More...

IS57DisplaySettings	DisplaySettings `[get, set]`
	The display settings control the symbolisation (drawing style) and what types of object are drawn or excluded from the drawing. More...

DOUBLE	PixelSizeMetres `[get, set]`
	The nominal size of a pixel. More...

DOUBLE	DirectionOfUp `[get]`
	The geographical orientation of the drawing surface. More...

IGeoRect	GeoExtent `[get]`
	The geographical rectangle of the drawing surface. More...

IDisplayPalette	DisplayPalette `[get, set]`
	The colour scheme for the chart. Use to draw the chart with lower luminance for twilight and night viewing. More...

VARIANT_BOOL	ShowPreviousCells `[get, set]`
	Draw the S-57 cells using the previous updates. Off by default. More...

S57Projection	ProjectionType `[get, set]`
	Projection (Cylindrical, Mercator or PolarStereographic) More...

ScaleBarUnits	Scalebar `[get, set]`
	The units for the scalebar. More...

VARIANT_BOOL	DrawGrid `[get, set]`
	Set to true to draw a simple geodetic grid on top of S-57 data (deprecated - use GridDisplaySettings instead) More...

IWVSDisplaySettings	WVSDisplaySettings `[get, set]`
	The display settings for single file WVS. More...

IGridDisplaySettings	GridDisplaySettings `[get, set]`
	The display settings for the grid. More...

DWORD	BackgroundColour `[get, set]`
	Get background colour. More...

IVPFDisplaySettings	VPFDisplaySettings `[get, set]`
	The VPF display settings to control drawing. More...

SBDetailedMode	ScalebarDetailedMode `[get, set]`
	Get scroll bar behaviour mode when display scale is less than 1:8,000. More...

Detailed Description

Display a continuous S-57 vector chart via a Win32 Device Context.

Supports

S-52 symbolisation.
Continuous smooth scrolling.
Changing scale.
Rotation (e.g. for heading up displays)
Full control of which types of feature, cells, features and layers are drawn.
Hit testing
Geo-referencing
Injection of OEM drawing between S-52 layers

Properties and methods via IS57Draw.

Notifications via _IS57DrawEvents.

Definition at line 4361 of file encxcom.idl.

Member Function Documentation

◆ AdjustAreaSymbolOffsets()

HRESULT IS57Draw::AdjustAreaSymbolOffsets	(	[in] LONG	cx,
		[in] LONG	cy
	)

inherited

Call with the offset of each scrolling action.

Adjusts the origin used when filling an area with symbols.

If AdjustAreaSymbolOffsets is used, then area fill symbols will scroll with the area features.

If AdjustAreaSymbolOffsets is not used, then area fill symbols will be fixed with respect to the drawing surface and will appear to be moving backwards in relation to the area features.

◆ CalculateNewDisplayScale()

HRESULT IS57Draw::CalculateNewDisplayScale	(	[out] VARIANT_BOOL *	pbAllowed,
		[out] LONG *	pnScaleOut,
		[in] LONG	nScaleOld,
		[in] LONG	nChange,
		[in] LONG	nSmallestChangeAllowed
	)

inherited

Obtain the sensible next scale in the specified direction.

The S57Draw will display the S-57 data at any scale. However this method provides scales that are typically as expected by a mariner.

Positive nChange values mean zooming in. Negative means zoom out. A value of 1 indicates zooming by one "notch", 2 by notches and so on.

The first out parameter (pbAllowed) is whether or not this calculation succeeded in producing a valid output scale. The second output parameter (pnScaleOut) is the suggested scale.

The scales output by CalculateNewDisplayScale are 1:1000, 1:2000, 1:4000, 1:5000, 1:7500 and similarly for other decades.

CalculateNewDisplayScale is a helper function. It does not affect the state of the S57Draw.

◆ DepthAtPoint()

HRESULT IS57Draw::DepthAtPoint	(	[in] IPixelPoint *	pixelPt,
		[out] DOUBLE *	depthInMetres,
		[out, retval] VARIANT_BOOL *	succeeded
	)

inherited

Get the depth at a pixel position within the view.

◆ Draw()

HRESULT IS57Draw::Draw ( [in] OLE_HANDLE lHDC )

inherited

Draw the chart to the specified device context.

◆ FeaturesAtPoint()

HRESULT IS57Draw::FeaturesAtPoint	(	[in] IPixelPoint *	pixelPt,
		[out, retval] IS57DrawnFeatures **	pVal
	)

inherited

◆ GetSize()

HRESULT IS57Draw::GetSize ( [out, retval] IPixelSize ** sz )

inherited

The area inside the rectangle (0,0) to (Size.Width,Size.Height) will be drawn.

◆ HighlightFeature()

HRESULT IS57Draw::HighlightFeature	(	[in] IS57FeatureIdentifier *	featureId,
		[in] VARIANT_BOOL	bClear
	)

inherited

Highlight the feature (true to clear existing highlights, false to add the feature to the ones already highlighted)

◆ HighlightSounding()

HRESULT IS57Draw::HighlightSounding	(	[in] IS57FeatureIdentifier *	featureId,
		[in] double	depthMetres,
		[in] VARIANT_BOOL	bClear
	)

inherited

Highlight the sounding (true to clear existing highlights, false to add the sounding to the ones already highlighted)

◆ OnDrawLayer()

HRESULT ENCX::_IS57DrawEvents::OnDrawLayer	(	OLE_HANDLE	hdc,
		enum S57CallBackDrawAction	action,
		IS57ProductAndUsage *	ProductAndUsage,
		BYTE	Layer
	)

inherited

Occurs before or after an S-57 layer is drawn.

◆ SetDirectionOfUp()

HRESULT IS57Draw::SetDirectionOfUp	(	[in] DOUBLE	degrees,
		[in] IPixelPoint *	ipPixelPt,
		[out, retval] VARIANT_BOOL *	pVal
	)

inherited

The geographical orientation of the drawing surface.

◆ SetDisplayScale()

HRESULT IS57Draw::SetDisplayScale	(	[in] LONG	nDisplayScale,
		[in] IPixelPoint *	ipPixelPt
	)

inherited

Set the nominal scale of the chart. Suitable for display to the user, but not for precise calculations.

Set nominal scale of the chart. Suitable for display to the user, but not for precise calculations. The pixel position is the pixel position where the relationship between geographic position and pixel position is constant. When zooming in and out with the mouse wheel or a hot key and the mouse is over the chart using the mouse position is a good idea! Use -1,-1 to default to centre of the view.

◆ SetDrawLayerCallback()

HRESULT IS57Draw::SetDrawLayerCallback	(	[in] enum S57CallBackDrawAction	callBackDrawAction,
		[in] IS57ProductAndUsage *	iproductAndUsage,
		[in] BYTE	Layer
	)

inherited

Insert a callback into the drawing sequence.

Results in _IS57DrawEvents::OnDrawLayer() being called during the drawing process.

Parameters

callBackDrawAction	When the callback should occur (before the layer is drawn, after it, or both)
iproductAndUsage	The type of S-57 (e.g. ENC) and the intended usage band within that product (e.g. a navigational purpose within the ENC product).
Layer	There are 10 layers of drawing within a single product and usage. Layer 0 is the bottom, Layer 9 is the top.

◆ SetManager()

HRESULT IS57Draw::SetManager ( [in] IS57Manager * pMgr )

inherited

Connect to a SENC. All the S-57 data to be drawn on the device context will be obtained from pMgr.

◆ SetPosition()

HRESULT IS57Draw::SetPosition	(	[in] IGeoPoint *	geoPt,
		[in] IPixelPoint *	pixelPt,
		[out, retval] VARIANT_BOOL *	bRes
	)

inherited

Set the geographical position at the specified pixel position on the drawing surface.

◆ SetPositionAndScale()

HRESULT IS57Draw::SetPositionAndScale	(	[in] IGeoRect *	geoRect,
		[out, retval] VARIANT_BOOL *	bRes
	)

inherited

Set the geographical position and scale so that the specified rectangle just fits on the drawing surface.

◆ SetPositionAndScaleExact()

HRESULT IS57Draw::SetPositionAndScaleExact	(	[in] IGeoRect *	geoRect,
		[out, retval] VARIANT_BOOL *	bRes
	)

inherited

Set the geographical position and scale so that the specified rectangle exactly. The corners of the drawing surface will correspond to the corners of the GeoRect. Use with caution - this method allows you to create some unlikely shaped charts!

◆ SetSize()

HRESULT IS57Draw::SetSize ( [in] IPixelSize * sz )

inherited

The area inside the rectangle (0,0) to (Size.Width,Size.Height) will be drawn.

◆ SetVPFManager()

HRESULT IS57Draw::SetVPFManager ( [in] IVPFManager * pMgr )

inherited

Connect to a VPF chart folder. All the VPF data to be drawn on the device context will be obtained from pMgr.

◆ VPFCoveragesAtPoint()

HRESULT IS57Draw::VPFCoveragesAtPoint	(	[in] IPixelPoint *	pixelPt,
		[out, retval] BSTR *	pXML
	)

inherited

Return XML describing the VPF coverages at a specified point.

◆ VPFFeaturesAtPoint()

HRESULT IS57Draw::VPFFeaturesAtPoint	(	[in] IPixelPoint *	pixelPt,
		[out, retval] BSTR *	pXML
	)

inherited

Return XML describing the VPF features at a specified point.

Property Documentation

◆ BackgroundColour

DWORD IS57Draw::BackgroundColour

getsetpropertyinherited

Get background colour.

Set background colour.

◆ DirectionOfUp

DOUBLE IS57Draw::DirectionOfUp

getinherited

The geographical orientation of the drawing surface.

◆ DisplayPalette

IDisplayPalette IS57Draw::DisplayPalette

getsetinherited

The colour scheme for the chart. Use to draw the chart with lower luminance for twilight and night viewing.

◆ DisplayScale

LONG IS57Draw::DisplayScale

getinherited

The nominal scale of the chart. Suitable for display to the user, but not for precise calculations.

◆ DisplaySettings

IS57DisplaySettings IS57Draw::DisplaySettings

getsetinherited

The display settings control the symbolisation (drawing style) and what types of object are drawn or excluded from the drawing.

◆ DrawGrid

VARIANT_BOOL IS57Draw::DrawGrid

getsetinherited

Set to true to draw a simple geodetic grid on top of S-57 data (deprecated - use GridDisplaySettings instead)

◆ GeoExtent

IGeoRect IS57Draw::GeoExtent

getpropertyinherited

The geographical rectangle of the drawing surface.

The result returned is a snapshot of the extent rather than a live reference to the internal state of the S57Draw object. in .NET ReferenceEquals(draw.GeoExtent, draw.GeoExtent) == false

◆ GeoPix

IGeoPix IS57Draw::GeoPix

getinherited

Obtain the geopix.

The IGeoPix can be used to draw geo-referenced information on top of the S-57 data and to obtain a geographical position from a pixel position.

◆ GridDisplaySettings

IGridDisplaySettings IS57Draw::GridDisplaySettings

getsetinherited

The display settings for the grid.

◆ PixelSizeMetres

DOUBLE IS57Draw::PixelSizeMetres

getsetinherited

The nominal size of a pixel.

The approximate distance on the ground can be obtained from PixelSizeMetres * IGeoPix::DisplayScale().

◆ PositionOfCentre

IGeoPoint IS57Draw::PositionOfCentre

getinherited

Obtain the geographical position of the centre of the drawing surface.

The result returned is a snapshot of the centre position rather than a live reference to the internal state of the S57Draw object. in .NET ReferenceEquals(draw.PositionOfCentre, draw.PositionOfCentre) == false

◆ ProjectionType

S57Projection IS57Draw::ProjectionType

getsetinherited

Projection (Cylindrical, Mercator or PolarStereographic)

◆ Scalebar

ScaleBarUnits IS57Draw::Scalebar

getsetinherited

The units for the scalebar.

◆ ScalebarDetailedMode

SBDetailedMode IS57Draw::ScalebarDetailedMode

getsetinherited

Get scroll bar behaviour mode when display scale is less than 1:8,000.

Set scroll bar behaviour mode when display scale is less than 1:8,000.

◆ ShowPreviousCells

VARIANT_BOOL IS57Draw::ShowPreviousCells

getsetpropertyinherited

Draw the S-57 cells using the previous updates. Off by default.

Change to true to draw each cell as it was before that cell was last updated.

◆ VPFDisplaySettings

IVPFDisplaySettings IS57Draw::VPFDisplaySettings

getsetinherited

The VPF display settings to control drawing.

◆ WVSDisplaySettings

IWVSDisplaySettings IS57Draw::WVSDisplaySettings

getsetinherited

The display settings for single file WVS.

Public Member Functions

Properties

Detailed Description

Member Function Documentation

◆ AdjustAreaSymbolOffsets()

◆ CalculateNewDisplayScale()

◆ DepthAtPoint()

◆ Draw()

◆ FeaturesAtPoint()

◆ GetSize()

◆ HighlightFeature()

◆ HighlightSounding()

◆ OnDrawLayer()

◆ SetDirectionOfUp()

◆ SetDisplayScale()

◆ SetDrawLayerCallback()

◆ SetManager()

◆ SetPosition()

◆ SetPositionAndScale()

◆ SetPositionAndScaleExact()

◆ SetSize()

◆ SetVPFManager()

◆ VPFCoveragesAtPoint()

◆ VPFFeaturesAtPoint()

Property Documentation

◆ BackgroundColour

◆ DirectionOfUp

◆ DisplayPalette

◆ DisplayScale

◆ DisplaySettings

◆ DrawGrid

◆ GeoExtent

◆ GeoPix

◆ GridDisplaySettings

◆ PixelSizeMetres

◆ PositionOfCentre

◆ ProjectionType

◆ Scalebar

◆ ScalebarDetailedMode

◆ ShowPreviousCells

◆ VPFDisplaySettings

◆ WVSDisplaySettings