GeometryLayer Class Reference

GeometryLayer class. More...

#include <geometrylayer.h>

Inheritance diagram for GeometryLayer:

List of all members.

Public Types
enum	LayerType { MapLayer, GeometryLayer }
	sets the type of a layer, see Layer class doc for further information More...
Public Slots
void	setVisible (bool visible)
	if visible is true, the layer is made visible
Signals
void	geometryClicked (Geometry *geometry, QPoint point)
	This signal is emitted when a Geometry is clicked.
Public Member Functions
void	addGeometry (Geometry *geometry)
	adds a Geometry object to this Layer
void	clearGeometries ()
	removes all Geometry objects from this Layer
	GeometryLayer (QString layername, MapAdapter *mapadapter, bool takeevents=true)
	GeometryLayer constructor.
bool	isVisible () const
	return true if the layer is visible
QString	layername () const
	returns the layer's name
Layer::LayerType	layertype () const
	returns the LayerType of the Layer
const MapAdapter *	mapadapter () const
	returns the layer´s MapAdapter
void	removeGeometry (Geometry *geometry)
	removes the Geometry object from this Layer

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Detailed Description

GeometryLayer class.

There are two different layer types:

• MapLayer: Displays Maps, but also Geometries. The configuration for displaying maps have to be done in the MapAdapter
• GeometryLayer: Only displays Geometry objects.

MapLayers also can display Geometry objects. The difference to the GeometryLayer is the repainting. Objects that are added to a MapLayer are "baken" on the map. This means, when you change it´s position for example the changes are not visible until a new offscreen image has been drawn. If you have "static" Geometries which won´t change their position this is fine. But if you want to change the objects position or pen you should use a GeometryLayer. Those are repainted immediately on changes.

Author:

Kai Winter <kaiwinter@gmx.de>

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Member Enumeration Documentation

enum LayerType [inherited]

sets the type of a layer, see Layer class doc for further information

Enumerator:

MapLayer	uses the MapAdapter to display maps, only gets refreshed when a new offscreen image is needed
GeometryLayer	gets refreshed everytime when a geometry changes

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Constructor & Destructor Documentation

GeometryLayer	(	QString	layername,
		MapAdapter *	mapadapter,
		bool	takeevents = true
	)

GeometryLayer constructor.

This is used to construct a map layer.

Parameters:

	layername	The name of the Layer
	mapadapter	The MapAdapter which does coordinate translation and Query-String-Forming
	takeevents	Should the Layer receive MouseEvents? This is set to true by default. Setting it to false could be something like a "speed up hint"

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Member Function Documentation

void addGeometry

(

Geometry *

geometry

)

[inherited]

adds a Geometry object to this Layer

Please notice the different LayerTypes (MapLayer and GeometryLayer) and the differences

Parameters:

geometry

the new Geometry

References Geometry::boundingBox().

void clearGeometries

(

)

[inherited]

removes all Geometry objects from this Layer

This method removes all Geometry objects from this Layer.

void geometryClicked	(	Geometry *	geometry,
		QPoint	point
	)			[signal, inherited]

This signal is emitted when a Geometry is clicked.

A Geometry is clickable, if the containing layer is clickable. The layer emits a signal for every clicked geometry

Parameters:

	geometry	The clicked Geometry
	point	The coordinate (in widget coordinates) of the click

bool isVisible

(

)

const [inherited]

return true if the layer is visible

Returns:

if the layer is visible

QString layername

(

)

const [inherited]

returns the layer's name

Returns:

the name of this layer

Layer::LayerType layertype

(

)

const [inherited]

returns the LayerType of the Layer

There are two LayerTypes: MapLayer and GeometryLayer

Returns:

the LayerType of this Layer

const MapAdapter * mapadapter

(

)

const [inherited]

returns the layer´s MapAdapter

This method returns the MapAdapter of this Layer, which can be useful to do coordinate transformations.

Returns:

the MapAdapter which us used by this Layer

void removeGeometry

(

Geometry *

geometry

)

[inherited]

removes the Geometry object from this Layer

This method removes a Geometry object from this Layer.

void setVisible

(

bool

visible

)

[slot, inherited]

if visible is true, the layer is made visible

Parameters:

visible

if the layer should be visible

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

• geometrylayer.h
• geometrylayer.cpp