This class represents a thread responsible to draw a given layer. Basically, this class receives draw layer requests and generates a QImage as result. More...

#include <DrawLayerThread.h>

Inheritance diagram for te::qt::widgets::DrawLayerThread:

Signals
void	drawLayerFinished (const int &index, const QImage &image)
	This signal is emitted when the draw process ends. More...

void	feedback (const QImage &image)
	This signal is emitted during the draw process. More...

Public Member Functions
void	draw (te::map::AbstractLayer *layer, const te::gm::Envelope &box, int srid, const QSize &size, const int &index)
	This method is used to request the draw of the given layer. More...

bool	finishedWithSuccess () const
	This method tells if the thread finished with success. More...

QString	getErrorMessage () const
	This method returns an error message if the thread has not finished with success. Otherwise, the error message is empty. More...

te::map::AbstractLayer *	getLayer () const
	This method returns the layer handled by this thread. More...

Initializer Methods
Methods related to instantiation and destruction.
	DrawLayerThread (QObject *parent=0)
	It constructs a new thread responsible to draw a given layer. More...

	~DrawLayerThread ()
	Destructor. More...

Protected Slots
void	onFinished ()

void	onStarted ()

void	sendFeedback ()

Protected Member Functions
void	run ()

Protected Attributes
te::gm::Envelope	m_env
	The interest area to draw the layer. More...

QString	m_errorMessage
	A string that contains an error message. More...

QTimer	m_feedback
	Timer used to send feedback. The feedback will be sent right after timeout() QTimer's signal. More...

bool	m_finishedWithSuccess
	A flag that indicates if the layer could be drawn. More...

QImage	m_image
	The image that will be generated during the draw process. More...

int	m_index
	An optional index that can be provided by the caller to keep the draw order. More...

int	m_interval
	Interval used to send feedbacks. More...

te::map::AbstractLayer *	m_layer
	The layer that will be drawn. More...

QMutex	m_mutex
	Controls the serialization between threads. More...

int	m_srid
	The SRS to be used to draw the layer objects. More...

Detailed Description

This class represents a thread responsible to draw a given layer. Basically, this class receives draw layer requests and generates a QImage as result.

Definition at line 55 of file DrawLayerThread.h.

Constructor & Destructor Documentation

te::qt::widgets::DrawLayerThread::DrawLayerThread ( QObject * parent = 0 )

It constructs a new thread responsible to draw a given layer.

Parameters

parent The thread's parent.

Definition at line 33 of file DrawLayerThread.cpp.

References m_feedback, onFinished(), onStarted(), and sendFeedback().

te::qt::widgets::DrawLayerThread::~DrawLayerThread ( )

Destructor.

Definition at line 43 of file DrawLayerThread.cpp.

Member Function Documentation

void te::qt::widgets::DrawLayerThread::draw	(	te::map::AbstractLayer *	layer,
		const te::gm::Envelope &	box,
		int	srid,
		const QSize &	size,
		const int &	index
	)

This method is used to request the draw of the given layer.

Parameters

layer	The layer that will be draw.
box	The interest area to draw the layer.
srid	The SRS to be used to draw the layer objects.
size	The result size, in pixels; e.g. (800 x 600).
index	An optional index that can be provided by the caller to keep the draw order.

Definition at line 48 of file DrawLayerThread.cpp.

void te::qt::widgets::DrawLayerThread::drawLayerFinished	(	const int &	index,
		const QImage &	image
	)

signal

This signal is emitted when the draw process ends.

Parameters

index	The thread index.
image	The final result of draw process.

void te::qt::widgets::DrawLayerThread::feedback ( const QImage & image )

signal

This signal is emitted during the draw process.

Parameters

image The partial result of draw process.

bool te::qt::widgets::DrawLayerThread::finishedWithSuccess ( ) const

This method tells if the thread finished with success.

Definition at line 74 of file DrawLayerThread.cpp.

Referenced by te::qt::widgets::MultiThreadMapDisplay::onDrawLayerFinished().

QString te::qt::widgets::DrawLayerThread::getErrorMessage ( ) const

This method returns an error message if the thread has not finished with success. Otherwise, the error message is empty.

Definition at line 79 of file DrawLayerThread.cpp.

Referenced by te::qt::widgets::MultiThreadMapDisplay::onDrawLayerFinished().

te::map::AbstractLayer * te::qt::widgets::DrawLayerThread::getLayer ( ) const

This method returns the layer handled by this thread.

Definition at line 84 of file DrawLayerThread.cpp.

Referenced by te::qt::widgets::MultiThreadMapDisplay::onDrawLayerFinished().

void te::qt::widgets::DrawLayerThread::onFinished ( )

protectedslot

Definition at line 135 of file DrawLayerThread.cpp.

Referenced by DrawLayerThread().

void te::qt::widgets::DrawLayerThread::onStarted ( )

protectedslot

Definition at line 125 of file DrawLayerThread.cpp.

Referenced by DrawLayerThread().

void te::qt::widgets::DrawLayerThread::run ( )

protected

Definition at line 89 of file DrawLayerThread.cpp.

References te::qt::widgets::Canvas::calcAspectRatio(), te::qt::widgets::Canvas::clear(), te::common::NO_CONNECTION_AVAILABLE, and te::qt::widgets::Canvas::setWindow().

void te::qt::widgets::DrawLayerThread::sendFeedback ( )

protectedslot

Definition at line 130 of file DrawLayerThread.cpp.

Referenced by DrawLayerThread().

Member Data Documentation

te::gm::Envelope te::qt::widgets::DrawLayerThread::m_env

protected

The interest area to draw the layer.

Definition at line 134 of file DrawLayerThread.h.

QString te::qt::widgets::DrawLayerThread::m_errorMessage

protected

A string that contains an error message.

Definition at line 142 of file DrawLayerThread.h.

QTimer te::qt::widgets::DrawLayerThread::m_feedback

protected

Timer used to send feedback. The feedback will be sent right after timeout() QTimer's signal.

Definition at line 139 of file DrawLayerThread.h.

Referenced by DrawLayerThread().

bool te::qt::widgets::DrawLayerThread::m_finishedWithSuccess

protected

A flag that indicates if the layer could be drawn.

Definition at line 141 of file DrawLayerThread.h.

QImage te::qt::widgets::DrawLayerThread::m_image

protected

The image that will be generated during the draw process.

Definition at line 137 of file DrawLayerThread.h.

int te::qt::widgets::DrawLayerThread::m_index

protected

An optional index that can be provided by the caller to keep the draw order.

Definition at line 136 of file DrawLayerThread.h.

int te::qt::widgets::DrawLayerThread::m_interval

protected

Interval used to send feedbacks.

Definition at line 140 of file DrawLayerThread.h.

te::map::AbstractLayer* te::qt::widgets::DrawLayerThread::m_layer

protected

The layer that will be drawn.

Definition at line 133 of file DrawLayerThread.h.

QMutex te::qt::widgets::DrawLayerThread::m_mutex

protected

Controls the serialization between threads.

Definition at line 138 of file DrawLayerThread.h.

int te::qt::widgets::DrawLayerThread::m_srid

protected

The SRS to be used to draw the layer objects.

Definition at line 135 of file DrawLayerThread.h.

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

/home/castejon/castejon_files/develop/terralib5/git/src/terralib/qt/widgets/canvas/DrawLayerThread.h
/home/castejon/castejon_files/develop/terralib5/git/src/terralib/qt/widgets/canvas/DrawLayerThread.cpp

Signals

Public Member Functions

Protected Slots

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation