KDChart::SignalCompressor Class Reference

#include <KDChartSignalCompressor.h>

Inheritance diagram for KDChart::SignalCompressor:

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Collaboration diagram for KDChart::SignalCompressor:

[legend]

List of all members.

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Detailed Description

SignalCompressor compresses signals where the same signal needs to be emitted by several pieces of the code, but only one of the signals should be received at the end.

Usage: create a object of SignalCompressor, and give it the name and object of the signal it is supposed to manage instead of emitting the signal, call emitSignal() on the compressor the signal will only be emitted once, and that is after the current call stack ends and returns to the event loop

With the current implementation, the class changes the sematics of signals to be a queued connection. If that is not wanted, another compression algorithm needs to be implemented. Also, at the moment, only nullary signals are supported, as parameters could not be compressed. A typical use of the class is to compress update notifications. This class is not part of the published KDChart API.

Definition at line 58 of file KDChartSignalCompressor.h.

Public Slots
void	emitSignal ()
Signals
void	finallyEmit ()
Public Member Functions
	SignalCompressor (QObject *receiver, const char *signal, QObject *parent=0)

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Constructor & Destructor Documentation

SignalCompressor::SignalCompressor	(	QObject *	receiver,
		const char *	signal,
		QObject *	parent = 0
	)

Definition at line 34 of file KDChartSignalCompressor.cpp.

References finallyEmit().

    : QObject( parent )
{
    connect( this, SIGNAL( finallyEmit() ), receiver, signal );
    connect( &m_timer, SIGNAL( timeout() ), SLOT( nowGoAlready() ) );
    m_timer.setSingleShot( true );
    // m_timer.setIntervall( 0 ); // default, just to know...
}

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Member Function Documentation

void SignalCompressor::emitSignal

(

)

[slot]

Definition at line 44 of file KDChartSignalCompressor.cpp.

{
    if ( !m_timer.isActive() ) m_timer.start();
}

void KDChart::SignalCompressor::finallyEmit

(

)

[signal]

Referenced by SignalCompressor().

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

• KDChartSignalCompressor.h
• KDChartSignalCompressor.cpp

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