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