CartoType::CLayerStyle Class Reference

#include <cartotype_style_sheet.h>

List of all members.

Public Member Functions
CT_IMPORT CLayerStyle *	Copy (TResult &aError) const
CT_IMPORT void	Normalise ()
CT_IMPORT const TObjectStyle *	ObjectStyle (const CMapObject &aObject, const CMapDrawParam *aMapDrawParam, bool *aOverridden=NULL) const
Public Attributes
CString	iName
TObjectStyle	iDefaultStyle
CPointerArray < CConditionalLayerStyle >	iConditionalStyle
bool	iDrawLabelLayer
bool	iHasForcedLevels
TFixed	iMaxIntersectionDistance
uint32	iRoadFlagMask
int32	iLayerGroup

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Detailed Description

A style for a map layer.

There is a default style and there are zero or more conditional styles. If there are no conditional styles all objects are drawn using the default style. If conditional styles exist, for each object the conditional styles are tested in order, and the first one for which the condition is true is used for the object.

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Member Function Documentation

CT_EXPORT CLayerStyle * CLayerStyle::Copy

(

TResult &

aError

)

const

Create a copy of a layer style.

CT_EXPORT void CLayerStyle::Normalise

(

)

Normalise the style (normally after it has been set by the style sheet) by modifying certain parameters to improve drawing. This function is not yet idempotent; it should be called only once after the style sheet has been set.

CT_EXPORT const TObjectStyle * CLayerStyle::ObjectStyle	(	const CMapObject &	aObject,
		const CMapDrawParam *	aMapDrawParam,
		bool *	aOverridden = NULL
	)		const

Determine the style for an object. If aOverridden is non-null, set it to indicate whether the style has been overridden. This allows the label drawing system to know that it cannot rely on pointer comparison to know whether to reset its fonts, because an overrider may return a pointer to the same style object after changing it.

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Member Data Documentation

CPointerArray<CConditionalLayerStyle> CartoType::CLayerStyle::iConditionalStyle

Styles used if there are conditions.

TObjectStyle CartoType::CLayerStyle::iDefaultStyle

The style used if there are no conditions.

bool CartoType::CLayerStyle::iDrawLabelLayer

If true, draw any accumulated labels and icons after this layer and clear any labels and icons..

bool CartoType::CLayerStyle::iHasForcedLevels

If true, there are one or more forced object levels; this is set by Normalise.

int32 CartoType::CLayerStyle::iLayerGroup

A group number allowing layers to be grouped, so that edges of line objects join together. Any number of layers can be grouped, allowing roads to be stored in separate layers for database lookup efficiency.

TFixed CartoType::CLayerStyle::iMaxIntersectionDistance

The maximum distance from an object, in pixels, that is affected when an object is drawn. For example, when roads are drawn, points up to half the road width are drawn to. This value is used when deciding which objects intersect a given region and therefore must be drawn.

To set this value correctly, call Normalise after setting the other parameters.

CString CartoType::CLayerStyle::iName

The name of the layer, as used in the style sheet.

uint32 CartoType::CLayerStyle::iRoadFlagMask

This mask determines which parts of the road type are used by this layer.

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The documentation for this class was generated from the following files:

• cartotype_style_sheet.h
• cartotype_style_sheet.cpp