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/***************************************************************************
* Copyright (C) 2006 by Peter Penz *
* peter.penz@gmx.at *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef ITEMEFFECTSMANAGER_H
#define ITEMEFFECTSMANAGER_H
#include <tqobject.h>
#include <tqpixmap.h>
#include <kurl.h>
#include <tqvaluelist.h>
class KFileItem;
/**
* @brief Abstract class to implement item effects for a Dolphin view.
*
* Derived classes must implement the following pure virtual methods:
* - ItemEffectsManager::setContextPixmap()
* - ItemEffectsManager::contextPixmap()
* - ItemEffectsManager::firstContext()
* - ItemEffectsManager::nextContext()
* - ItemEffectsManager::contextFileInfo()
*
* The item effects manager highlights currently active items and also
* respects cutted items. A 'context' is defined as abstract data type,
* which usually is represented by a KFileListViewItem or
* a KFileIconViewItem.
*
* In TQt4 the item effects manager should get integrated as part of Interview
* and hence no abstract context handling should be necessary anymore. The main
* purpose of the current interface is to prevent code duplication as there is
* no common model shared by TQListView and TQIconView of TQt3.
*
* @see DolphinIconsView
* @see DolphinDetailsView
* @author Peter Penz <peter.penz@gmx.at>
*/
class ItemEffectsManager
{
public:
ItemEffectsManager();
virtual ~ItemEffectsManager();
/** Is invoked before the items get updated. */
virtual void beginItemUpdates() = 0;
/** Is invoked after the items have been updated. */
virtual void endItemUpdates() = 0;
/**
* Increases the size of the current set view mode and refreshes
* all views. Derived implementations must invoke the base implementation
* if zooming in had been done.
*/
virtual void zoomIn();
/**
* Decreases the size of the current set view mode and refreshes
* all views. Derived implementations must invoke the base implementation
* if zooming out had been done.
*/
virtual void zoomOut();
/**
* Returns true, if zooming in is possible. If false is returned,
* the minimal zoom size is possible.
*/
virtual bool isZoomInPossible() const = 0;
/**
* Returns true, if zooming in is possible. If false is returned,
* the minimal zoom size is possible.
*/
virtual bool isZoomOutPossible() const = 0;
protected:
virtual void setContextPixmap(void* context,
const TQPixmap& pixmap) = 0;
virtual const TQPixmap* contextPixmap(void* context) = 0;
virtual void* firstContext() = 0;
virtual void* nextContext(void* context) = 0;
virtual KFileItem* contextFileInfo(void* context) = 0;
void activateItem(void* context);
void resetActivatedItem();
void updateDisabledItems();
private:
struct DisabledItem {
KURL url;
TQPixmap pixmap;
};
TQPixmap* m_pixmapCopy;
KURL m_highlightedURL;
// contains all items which have been disabled by a 'cut' operation
TQValueList<DisabledItem> m_disabledItems;
/** Returns the text for the statusbar for an activated item. */
TQString statusBarText(KFileItem* fileInfo) const;
};
#endif
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