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/* This file is part of the KDE libraries
* Copyright (C) 2001 Frerich Raabe <raabe@kde.org>
* 2003 Carsten Pfeiffer <pfeiffer@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __KPREVIEWWIDGETBASE_H__
#define __KPREVIEWWIDGETBASE_H__
#include <tqptrdict.h>
#include <tqwidget.h>
#include <kdelibs_export.h>
class KURL;
/**
* Abstract baseclass for all preview widgets which shall be used via
* KFileDialog::setPreviewWidget(const KPreviewWidgetBase *).
* Ownership will be transferred to KFileDialog, so you have to create
* the preview with "new" and let KFileDialog delete it.
*
* Just derive your custom preview widget from KPreviewWidgetBase and implement
* all the pure virtual methods. The slot showPreview(const KURL &) is called
* every time the file selection changes.
*
* @short Abstract baseclass for all preview widgets.
* @author Frerich Raabe <raabe@kde.org>
*/
class KIO_EXPORT KPreviewWidgetBase : public TQWidget
{
Q_OBJECT
public:
/**
* Constructor. Construct the user interface of your preview widget here
* and pass the KFileDialog this preview widget is going to be used in as
* the parent.
*
* @param parent The KFileDialog this preview widget is going to be used in
* @param name The internal name of this object
*/
KPreviewWidgetBase(TQWidget *parent, const char *name=0);
~KPreviewWidgetBase();
public slots:
/**
* This slot is called every time the user selects another file in the
* file dialog. Implement the stuff necessary to reflect the change here.
*
* @param url The URL of the currently selected file.
*/
virtual void showPreview(const KURL &url) = 0;
/**
* Reimplement this to clear the preview. This is called when e.g. the
* selection is cleared or when multiple selections exist, or the directory
* is changed.
*/
virtual void clearPreview() = 0;
TQStringList supportedMimeTypes() const;
protected:
void setSupportedMimeTypes( const TQStringList& mimeTypes );
protected:
virtual void virtual_hook( int, void* ) {};
private:
class KPreviewWidgetBasePrivate;
KPreviewWidgetBasePrivate * d() const {
return s_private->find( const_cast<KPreviewWidgetBase*>( this ) );
}
static TQPtrDict<KPreviewWidgetBasePrivate> * s_private;
};
#endif
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