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/* ============================================================
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*
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* This file is a part of digiKam project
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* http://www.digikam.org
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*
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* Date : 2007-04-15
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* Description : a zoom bar used in status bar.
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*
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* Copyright (C) 2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ============================================================ */
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// TQt includes.
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#include <tqtoolbutton.h>
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#include <tqtimer.h>
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#include <tqslider.h>
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#include <tqtooltip.h>
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#include <tqevent.h>
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// KDE includes.
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#include <klocale.h>
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#include <kiconloader.h>
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// Local includes.
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#include "thumbnailsize.h"
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#include "dcursortracker.h"
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#include "statuszoombar.h"
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#include "statuszoombar.moc"
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namespace Digikam
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{
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TQSliderReverseWheel::TQSliderReverseWheel(TQWidget *tqparent)
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: TQSlider(tqparent)
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{
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// empty, we just need to re-implement wheelEvent to reverse the wheel
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}
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TQSliderReverseWheel::~TQSliderReverseWheel()
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{
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}
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void TQSliderReverseWheel::wheelEvent(TQWheelEvent * e)
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{
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if ( e->orientation() != orientation() && !TQT_TQRECT_OBJECT(rect()).contains(e->pos()) )
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return;
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static float offset = 0;
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static TQSlider* offset_owner = 0;
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if (offset_owner != this){
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offset_owner = this;
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offset = 0;
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}
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// note: different sign in front of e->delta vs. original implementation
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offset += e->delta()*TQMAX(pageStep(),lineStep())/120;
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if (TQABS(offset)<1)
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return;
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setValue( value() + int(offset) );
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offset -= int(offset);
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e->accept();
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}
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// ----------------------------------------------------------------------
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class StatusZoomBarPriv
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{
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public:
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StatusZoomBarPriv()
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{
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zoomTracker = 0;
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zoomMinusButton = 0;
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zoomPlusButton = 0;
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zoomSlider = 0;
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zoomTimer = 0;
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}
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TQToolButton *zoomPlusButton;
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TQToolButton *zoomMinusButton;
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TQTimer *zoomTimer;
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TQSlider *zoomSlider;
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DTipTracker *zoomTracker;
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};
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StatusZoomBar::StatusZoomBar(TQWidget *tqparent)
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: TQHBox(tqparent, 0, TQt::WDestructiveClose)
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{
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d = new StatusZoomBarPriv;
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setFocusPolicy(TQ_NoFocus);
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d->zoomMinusButton = new TQToolButton(this);
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d->zoomMinusButton->setAutoRaise(true);
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d->zoomMinusButton->setFocusPolicy(TQ_NoFocus);
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d->zoomMinusButton->setIconSet(SmallIconSet("viewmag-"));
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TQToolTip::add(d->zoomMinusButton, i18n("Zoom Out"));
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d->zoomSlider = new TQSliderReverseWheel(this);
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d->zoomSlider->setMinValue(ThumbnailSize::Small);
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d->zoomSlider->setMaxValue(ThumbnailSize::Huge);
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d->zoomSlider->setPageStep(ThumbnailSize::Step);
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d->zoomSlider->setValue(ThumbnailSize::Medium);
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d->zoomSlider->setOrientation(Qt::Horizontal);
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d->zoomSlider->setLineStep(ThumbnailSize::Step);
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d->zoomSlider->setMaximumHeight(fontMetrics().height()+2);
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d->zoomSlider->setFixedWidth(120);
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d->zoomSlider->setFocusPolicy(TQ_NoFocus);
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d->zoomPlusButton = new TQToolButton(this);
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d->zoomPlusButton->setAutoRaise(true);
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d->zoomPlusButton->setIconSet(SmallIconSet("viewmag+"));
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d->zoomPlusButton->setFocusPolicy(TQ_NoFocus);
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TQToolTip::add(d->zoomPlusButton, i18n("Zoom In"));
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d->zoomTracker = new DTipTracker("", d->zoomSlider);
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// -------------------------------------------------------------
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connect(d->zoomMinusButton, TQT_SIGNAL(clicked()),
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this, TQT_SIGNAL(signalZoomMinusClicked()));
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connect(d->zoomPlusButton, TQT_SIGNAL(clicked()),
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this, TQT_SIGNAL(signalZoomPlusClicked()));
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connect(d->zoomSlider, TQT_SIGNAL(valueChanged(int)),
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this, TQT_SIGNAL(signalZoomSliderChanged(int)));
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connect(d->zoomSlider, TQT_SIGNAL(valueChanged(int)),
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this, TQT_SLOT(slotZoomSliderChanged(int)));
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connect(d->zoomSlider, TQT_SIGNAL(sliderReleased()),
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this, TQT_SLOT(slotZoomSliderReleased()));
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}
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StatusZoomBar::~StatusZoomBar()
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{
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if (d->zoomTimer)
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delete d->zoomTimer;
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delete d->zoomTracker;
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delete d;
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}
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void StatusZoomBar::slotZoomSliderChanged(int)
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{
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if (d->zoomTimer)
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{
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d->zoomTimer->stop();
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delete d->zoomTimer;
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}
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d->zoomTimer = new TQTimer( this );
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connect(d->zoomTimer, TQT_SIGNAL(timeout()),
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this, TQT_SLOT(slotDelayedZoomSliderChanged()) );
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d->zoomTimer->start(300, true);
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}
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void StatusZoomBar::slotDelayedZoomSliderChanged()
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{
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emit signalDelayedZoomSliderChanged(d->zoomSlider->value());
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}
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void StatusZoomBar::slotZoomSliderReleased()
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{
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emit signalZoomSliderReleased(d->zoomSlider->value());
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}
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void StatusZoomBar::setZoomSliderValue(int v)
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{
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d->zoomSlider->blockSignals(true);
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d->zoomSlider->setValue(v);
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d->zoomSlider->blockSignals(false);
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}
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void StatusZoomBar::setZoomTrackerText(const TQString& text)
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{
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d->zoomTracker->setText(text);
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}
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void StatusZoomBar::setEnableZoomPlus(bool e)
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{
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d->zoomPlusButton->setEnabled(e);
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}
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void StatusZoomBar::setEnableZoomMinus(bool e)
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{
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d->zoomMinusButton->setEnabled(e);
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}
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} // namespace Digikam
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