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/***************************************************************************
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clipboardinterface.h - description
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-------------------
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begin : Sat Sep 13 2003
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copyright : (C) 2003 by Friedrich W. H. Kossebau
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email : Friedrich.W.H@Kossebau.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License version 2 as published by the Free Software Foundation. *
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* *
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***************************************************************************/
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#ifndef CLIPBOARDINTERFACE_H
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#define CLIPBOARDINTERFACE_H
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namespace KHE
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{
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/**
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* @short A simple interface for interaction with the clipboard
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*
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* This interface enables the interaction with the clipboard. It relies on the
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* possibilities of signal/slot so a class B that implements this interface
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* should be derived from TQObject. When connecting to a signal or a slot
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* the class B has to be used, not the interface.
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* <p>
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* Example:
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* \code
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* KHE::ClipboardInterface *Clipboard = KHE::clipboardInterface( BytesEditWidget );
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* if( Clipboard )
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* {
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* <20> // Yes, use BytesEditWidget, not Clipboard, because that's the TQObject, indeed hacky...
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* <20> connect( BytesEditWidget, TQ_SIGNAL(copyAvailable(bool)), this, TQ_SLOT(offerCopy(bool)) );
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* }
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* \endcode
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*
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* @author Friedrich W. H. Kossebau <Friedrich.W.H@Kossebau.de>
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* @see createBytesEditWidget(), clipboardInterface()
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* @since 3.2
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*/
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class ClipboardInterface
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{
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public: // slots
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/** tries to copy. If there is nothing to copy this call is a noop. */
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virtual void copy() = 0;
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/** tries to cut. If there is nothing to cut this call is a noop. */
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virtual void cut() = 0;
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/** tries to paste.
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* If there is nothing to paste or paste is not possible this call is a noop.
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* Use BytesEditInterface::isReadOnly() to find out if you can paste at all.
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*/
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virtual void paste() = 0;
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public: // signals
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/** signal: tells whether copy is possible or not.
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* Remember to use the created object, not the interface for connecting
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* Use BytesEditInterface::isReadOnly() to find out if you can also cut
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* As this function symbol serves as a signal, this is a noop. Don't use it
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* for anything else.
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*/
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virtual void copyAvailable( bool Really ) = 0;
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};
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/** tries to get the clipboard interface of t
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* @return a pointer to the interface, otherwise 0
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* @author Friedrich W. H. Kossebau <Friedrich.W.H@Kossebau.de>
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* @since 3.2
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*/
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template<class T>
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ClipboardInterface *clipboardInterface( T *t )
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{
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if( !t )
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return 0;
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return ::tqt_cast<KHE::ClipboardInterface*>( t );
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}
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}
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#endif
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