A Proxy for the CanvasView class. More...

#include <CanvasViewProxy.h>

Inheritance diagram for CanvasViewProxy:

Collaboration diagram for CanvasViewProxy:

Signals
void	addDisplaySignal (PlotterBase *plotter)
	Signal used to add a plotter display to the canvas. More...

void	clearSignal ()
	Signal used to clear all displays from canvas. More...

void	saveAsImageSignal (const PlotterBase *plotter, const std::string &filename)
	Save the plotter as an image file. More...

void	swapOrientationSignal ()
	Swaps the orientation. More...

Public Member Functions
void	addDisplay (PlotterBase *plotter)
	Adds a plotter display to the canvas. More...

	CanvasViewProxy (CanvasView *view)
	The constructor taking the CanvasView object to be used. More...

void	clear ()
	Clears the canvas of all displays. More...

void	saveAsImage (const PlotterBase *, const std::string &filename)
	Saves the plotter as image file with name filename. More...

void	swapOrientation ()
	Swaps the orientation from portrait to landscape and vice verse. More...

virtual	~CanvasViewProxy ()
	The destructor. More...

Private Member Functions
	blockSignals (bool block)

	CanvasViewProxy (const CanvasViewProxy &)
	Private copy constructor to prevent copying. More...

	checkConnectArgs (const char signal, const QObject receiver, const char *member)

	child (const char objName, const char inheritsClass=0, bool recursiveSearch=TRUE)

	childEvent (QChildEvent *)

	children () const

	className () const

	connect (const QObject sender, const char signal, const char *member) const

	connect (const QObject sender, const char signal, const QObject receiver, const char member)

	connectNotify (const char *signal)

	customEvent (QCustomEvent *)

	deleteLater ()

	destroyed ()

	destroyed (QObject *obj)

	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

	disconnect (const QObject receiver, const char member=0)

	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)

	disconnectNotify (const char *signal)

	dumpObjectInfo ()

	dumpObjectTree ()

	event (QEvent *e)

	eventFilter (QObject watched, QEvent e)

	highPriority () const

	inherits (const char *clname) const

	insertChild (QObject *obj)

	installEventFilter (const QObject *filterObj)

	isA (const char *clname) const

	isWidgetType () const

	killTimer (int id)

	killTimers ()

void	lock ()
	Gets mutex lock from application object. More...

	metaObject () const

	name () const

	name (const char *defaultName) const

	normalizeSignalSlot (const char *signalSlot)

	objectTrees ()

	parent () const

	prop -the name of this object

	property (const char *name) const

	qt_find_obj_child (QObject parent, const char type, const char *name)

	queryList (const char inheritsClass=0, const char objName=0, bool regexpMatch=TRUE, bool recursiveSearch=TRUE) const

	removeChild (QObject *obj)

	removeEventFilter (const QObject *obj)

	sender ()

	setName (const char *name)

	setProperty (const char *name, const QVariant &value)

	signalsBlocked () const

	startTimer (int interval)

	timerEvent (QTimerEvent *)

	tr (const char sourceText, const char comment)

	trUtf8 (const char sourceText, const char comment)

void	unlock ()
	Releases the mutex lock to the application object. More...

Private Attributes
CanvasView *	m_canvas_view
	The CanvasView object managed by this proxy. More...

Detailed Description

A Proxy for the CanvasView class.

A Proxy for the CanvaView is responsible for invoking member functions of the CanvasView class in a thread safe manner. For example, the CanvasView object is executed in the GUI thread, while a Python script or command is in a different thread, perhaps the main thread. Thus Python should use the CanvasViewProxy to invoke member functions of the CanvasView object.

For Qt 3, this class users the QApplication::lock() and QApplication::unlock() methods in insure that the GUI thread is not running when modifying the canvas. For Qt 4, locking and unlocking is not needed since the signal/slot connection is thread safe, which was not the case for Qt 3.