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/*
* kis_previewwidget.h - part of Chalk
*
* Copyright (c) 2001 John Califf <jcaliff@compuzone.net>
* Copyright (c) 2004 Bart Coppens <kde@bartcoppens.be>
* Copyright (c) 2005 Cyrille Berger <cberger@cberger.net>
* Copyright (c) 2007 Benjamin Schleimer <bensch128@yahoo.com>
*
* 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 __kis_previewwidget_h__
#define __kis_previewwidget_h__
#include <tqimage.h>
#include <tqevent.h>
#include "kis_types.h"
#include "kis_previewwidgetbase.h"
class TQWidget;
class KisProfile;
class KisFilter;
class KisFilterConfiguration;
class TQTimer;
class KisLabelProgress;
/**
* A widget that can be used by plugins to show a preview of the effect of the
* plugin to the user. This is a convenience class thand handily packs a source and a
* preview view together with a zoom button.
* It would be nice if every plugin that needs to show a preview
* (maybe not those that create a new image) would use this. This can prevent the distracting
* effect the GIMP has with a different preview for almost every filter.
*/
class KisPreviewWidget : public PreviewWidgetBase
{
Q_OBJECT
public:
/** Constructs the widget */
KisPreviewWidget( TQWidget* parent = 0, const char* name = 0 );
virtual ~KisPreviewWidget();
/** returns if the preview is automatically updated */
bool getAutoUpdate() const;
void wheelEvent(TQWheelEvent * e);
/** Instructs the KisPreviewWidget to eventually update the preview.
* KisPreviewWidget delays the actual running of the filter for 500ms
* so if the user is changing a configuration setting, it won't run multiple time.
* @param filter to run on the image
* @config to use when filtering.
*/
void runFilter(KisFilter * filter, KisFilterConfiguration * config);
public slots:
/** Sets the preview to use the layer specified as argument */
void slotSetDevice(KisPaintDeviceSP dev);
/** Enables or disables the automatically updating of the preview */
void slotSetAutoUpdate(bool set);
/** Toggle between display preview and display original */
void setPreviewDisplayed(bool v);
/** use to indicate that the preview need to be updated. */
void needUpdate();
signals:
/** This is emitted when the position or zoom factor of the widget has changed */
void updated();
private slots:
void zoomIn();
void zoomOut();
void zoomOneToOne();
/**
* Called when the "Force Update" button is clicked
*/
void forceUpdate();
/**
* Updates the zoom and redisplays either the original or the preview (filtered) image
*/
void updateZoom();
/** Internal method which actually runs the filter
*/
void runFilterHelper();
private:
/**
* Recalculates the zoom factor
*/
void zoomChanged(const double zoom);
bool m_autoupdate; /// Flag indicating that the widget should auto update whenever a setting is changed
bool m_previewIsDisplayed; /// Flag indicating whether the filtered or original image is displayed
TQImage m_scaledOriginal; /// TQImage copy of the original image
bool m_dirtyOriginal; /// flag indicating that the original image is dirty
KisPaintDeviceSP m_origDevice; /// Pointer to the original image
TQImage m_scaledPreview; /// TQImage copy of the filtered image
bool m_dirtyPreview; /// flag indicating that the preview image is dirty
KisPaintDeviceSP m_previewDevice; /// Pointer to the preview image
KisImageSP m_scaledImage; /// Scaled image copied from the original
double m_filterZoom; /// Zoom amount when the filtering occurred
double m_zoom; /// Current zoom amount
KisProfile * m_profile; /// the color profile to use when converting to TQImage
KisLabelProgress *m_progress; /// Progress bar of the preview.
TQTimer * m_zoomTimer; /// Timer used to update the view whenever the zoom changes
TQTimer * m_filterTimer; /// Timer used to update the view whenever the filter changes
KisFilter * m_filter; /// Filter used
KisFilterConfiguration * m_config; /// Configuration used
bool m_firstFilter; /// Flag to determine if we should delay the first filter or not
bool m_firstZoom; /// Flag to determine if we should delay the first zoom or not
};
#endif
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