Differential D8538 Diff 21494 libs/global/kis_signal_compressor.h

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libs/global/kis_signal_compressor.h

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19	#ifndef __KIS_SIGNAL_COMPRESSOR_H	19	#ifndef __KIS_SIGNAL_COMPRESSOR_H
20	#define __KIS_SIGNAL_COMPRESSOR_H	20	#define __KIS_SIGNAL_COMPRESSOR_H
21		21
22	#include <QTimer>	22	#include <QObject>
		23	#include <QBasicTimer>
		24	#include <QElapsedTimer>
23	#include "kritaglobal_export.h"	25	#include "kritaglobal_export.h"
24		26
25	class QTimer;
26
27	/**	27	/**
28	* Sets a timer to delay or throttle activation of a Qt slot. One example of	28	* Sets a timer to delay or throttle activation of a Qt slot. One example of
29	* where this is used is to limit the amount of expensive redraw activity on the	29	* where this is used is to limit the amount of expensive redraw activity on the
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51	* delay ms. The compressor becomes inactive and all events are ignored until	51	* delay ms. The compressor becomes inactive and all events are ignored until
52	* the timer has elapsed.	52	* the timer has elapsed.
53	*	53	*
		54	* The current implementation allows the timeout() to be delayed by up to 2 times
		55	* \p delay in certain situations (for details see cpp file).
54	*/	56	*/
55	class KRITAGLOBAL_EXPORT KisSignalCompressor : public QObject	57	class KRITAGLOBAL_EXPORT KisSignalCompressor : public QObject
56	{	58	{
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76	void start();	78	void start();
77	void stop();	79	void stop();
78		80
79	private Q_SLOTS:
80	void slotTimerExpired();
81
82	Q_SIGNALS:	81	Q_SIGNALS:
83	void timeout();	82	void timeout();
84		83
		84	protected:
		85	void timerEvent(QTimerEvent *event) override;
		86
85	private:	87	private:
86	QTimer *m_timer;	88	void startTimer();
		89
		90	QBasicTimer m_monitor;
		91	int m_idle;
		92	int m_postpone;
		93
		94	int m_delay;
87	Mode m_mode;	95	Mode m_mode;
		96
88	bool m_gotSignals;	97	bool m_gotSignals;
		98	bool m_active;
		99	QElapsedTimer m_elapsed;
89	};	100	};
90		101
91	#endif /* __KIS_SIGNAL_COMPRESSOR_H */	102	#endif /* __KIS_SIGNAL_COMPRESSOR_H */
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