File indexing completed on 2024-06-16 04:10:09

 /*
    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 
 #define DEBUG_KP_EFFECT_BALANCE 0
 
 
 #include "kpEffectBalanceWidget.h"
 
 #include "imagelib/effects/kpEffectBalance.h"
 #include "commands/imagelib/effects/kpEffectBalanceCommand.h"
 #include "pixmapfx/kpPixmapFX.h"
 
 #include "kpLogCategories.h"
 #include <KLocalizedString>
 #include "kpNumInput.h"
 
 #include <cmath>
 
 #include <QComboBox>
 #include <QGridLayout>
 #include <QLabel>
 #include <QPushButton>
 
 #if DEBUG_KP_EFFECT_BALANCE
     #include <qdatetime.h>
 #endif
 
 
 kpEffectBalanceWidget::kpEffectBalanceWidget (bool actOnSelection,
                                               QWidget *parent)
     : kpEffectWidgetBase (actOnSelection, parent)
 {
     auto *lay = new QGridLayout (this);
     lay->setContentsMargins(0, 0, 0, 0);
 
     auto *brightnessLabel = new QLabel (i18n ("&Brightness:"), this);
     m_brightnessInput = new kpIntNumInput (0/*value*/, this);
     m_brightnessInput->setRange (-50, 50);
     auto *brightnessResetPushButton = new QPushButton (i18n ("Re&set"), this);
 
     auto *contrastLabel = new QLabel (i18n ("Co&ntrast:"), this);
     m_contrastInput = new kpIntNumInput (0/*value*/, this);
     m_contrastInput->setRange (-50, 50);
      auto *contrastResetPushButton = new QPushButton (i18n ("&Reset"), this);
 
     auto *gammaLabel = new QLabel (i18n ("&Gamma:"), this);
     m_gammaInput = new kpIntNumInput (0/*value*/, this);
     m_gammaInput->setRange (-50, 50);
     // TODO: This is what should be shown in the m_gammaInput spinbox
     m_gammaLabel = new QLabel (this);
     // TODO: This doesn't seem to be wide enough with some fonts so the
     //       whole layout moves when we drag the gamma slider.
     m_gammaLabel->setMinimumWidth(m_gammaLabel->fontMetrics().horizontalAdvance(QLatin1String(" 10.00 ")));
     m_gammaLabel->setAlignment (m_gammaLabel->alignment () | Qt::AlignRight);
     auto *gammaResetPushButton = new QPushButton (i18n ("Rese&t"), this);
 
 
     auto *spaceWidget = new QLabel (this);
     spaceWidget->setFixedSize (1, fontMetrics ().height () / 4);
 
 
     auto *channelLabel = new QLabel (i18n ("C&hannels:"), this);
     m_channelsComboBox = new QComboBox (this);
     m_channelsComboBox->addItem (i18n ("All"));
     m_channelsComboBox->addItem (i18n ("Red"));
     m_channelsComboBox->addItem (i18n ("Green"));
     m_channelsComboBox->addItem (i18n ("Blue"));
 
 
     auto *resetPushButton = new QPushButton (i18n ("Reset &All Values"), this);
 
 
     brightnessLabel->setBuddy (m_brightnessInput);
     contrastLabel->setBuddy (m_contrastInput);
     gammaLabel->setBuddy (m_gammaInput);
 
     channelLabel->setBuddy (m_channelsComboBox);
 
 
     lay->addWidget (brightnessLabel, 0, 0);
     lay->addWidget (m_brightnessInput, 0, 1, 1, 2);
     lay->addWidget (brightnessResetPushButton, 0, 4);
 
     lay->addWidget (contrastLabel, 1, 0);
     lay->addWidget (m_contrastInput, 1, 1, 1, 2);
     lay->addWidget (contrastResetPushButton, 1, 4);
 
     lay->addWidget (gammaLabel, 2, 0);
     lay->addWidget (m_gammaInput, 2, 1, 1, 2);
     lay->addWidget (m_gammaLabel, 2, 3);
     lay->addWidget (gammaResetPushButton, 2, 4);
 
     lay->addWidget (spaceWidget, 3, 0, 1, 5);
     lay->addWidget (resetPushButton, 4, 2, 1, 3, Qt::AlignRight);
 
     lay->addWidget (channelLabel, 4, 0);
     lay->addWidget (m_channelsComboBox, 4, 1, Qt::AlignLeft);
     //lay->addWidget (resetPushButton, 4, 2, Qt::AlignRight);
 
     lay->setColumnStretch (1, 1);
 
 
     // (no need for settingsChangedDelayed() since BCG effect is so fast :))
     connect (m_brightnessInput, &kpIntNumInput::valueChanged,
              this, &kpEffectBalanceWidget::settingsChangedNoWaitCursor);
     connect (m_contrastInput, &kpIntNumInput::valueChanged,
              this, &kpEffectBalanceWidget::settingsChangedNoWaitCursor);
 
     connect (m_gammaInput, &kpIntNumInput::valueChanged,
              this, &kpEffectBalanceWidget::recalculateGammaLabel);
     connect (m_gammaInput, &kpIntNumInput::valueChanged,
              this, &kpEffectBalanceWidget::settingsChangedNoWaitCursor);
 
     connect (m_channelsComboBox,
              static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
              this, &kpEffectBalanceWidget::settingsChanged);
 
     connect (brightnessResetPushButton, &QPushButton::clicked,
              this, &kpEffectBalanceWidget::resetBrightness);
     connect (contrastResetPushButton, &QPushButton::clicked,
              this, &kpEffectBalanceWidget::resetContrast);
     connect (gammaResetPushButton, &QPushButton::clicked,
              this, &kpEffectBalanceWidget::resetGamma);
 
     connect (resetPushButton, &QPushButton::clicked,
              this, &kpEffectBalanceWidget::resetAll);
 
     recalculateGammaLabel ();
 }
 
 kpEffectBalanceWidget::~kpEffectBalanceWidget () = default;
 
 
 // public virtual [base kpEffectWidgetBase]
 QString kpEffectBalanceWidget::caption () const
 {
     return i18n ("Settings");
 }
 
 
 // public virtual [base kpEffectWidgetBase]
 bool kpEffectBalanceWidget::isNoOp () const
 {
     return (brightness () == 0 && contrast () == 0 && gamma () == 0);
 }
 
 // public virtual [base kpEffectWidgetBase]
 kpImage kpEffectBalanceWidget::applyEffect (const kpImage &image)
 {
     return kpEffectBalance::applyEffect (image,
         channels (), brightness (), contrast (), gamma ());
 }
 
 // public virtual [base kpEffectWidgetBase]
 kpEffectCommandBase *kpEffectBalanceWidget::createCommand (
         kpCommandEnvironment *cmdEnviron) const
 {
     return new kpEffectBalanceCommand (channels (),
                                        brightness (), contrast (), gamma (),
                                        m_actOnSelection,
                                        cmdEnviron);
 }
 
 
 // protected
 int kpEffectBalanceWidget::channels () const
 {
     switch (m_channelsComboBox->currentIndex ())
     {
     default:
     case 0:
         return kpEffectBalance::RGB;
 
     case 1:
         return kpEffectBalance::Red;
 
     case 2:
         return kpEffectBalance::Green;
 
     case 3:
         return kpEffectBalance::Blue;
     }
 }
 
 
 // protected
 int kpEffectBalanceWidget::brightness () const
 {
     return m_brightnessInput->value ();
 }
 
 // protected
 int kpEffectBalanceWidget::contrast () const
 {
     return m_contrastInput->value ();
 }
 
 // protected
 int kpEffectBalanceWidget::gamma () const
 {
     return m_gammaInput->value ();
 }
 
 
 // protected slot
 void kpEffectBalanceWidget::recalculateGammaLabel ()
 {
     m_gammaLabel->setText (
         QLatin1String (" ") +
         QString::number (std::pow (10, gamma () / 50.0),
                          'f'/*[-]9.9*/,
                          2/*precision*/) +
         QLatin1String (" "));
     m_gammaLabel->repaint ();
 }
 
 
 // protected slot
 void kpEffectBalanceWidget::resetBrightness ()
 {
     if (brightness () == 0) {
         return;
     }
 
     bool sb = signalsBlocked ();
 
     if (!sb) {
         blockSignals (true);
     }
     m_brightnessInput->setValue (0);
     if (!sb) {
         blockSignals (false);
     }
 
     // Immediate update (if signals aren't blocked)
     Q_EMIT settingsChanged ();
 }
 
 // protected slot
 void kpEffectBalanceWidget::resetContrast ()
 {
     if (contrast () == 0) {
         return;
     }
 
     bool sb = signalsBlocked ();
 
     if (!sb) {
         blockSignals (true);
     }
     m_contrastInput->setValue (0);
     if (!sb) {
         blockSignals (false);
     }
 
     // Immediate update (if signals aren't blocked)
     Q_EMIT settingsChanged ();
 }
 
 // protected slot
 void kpEffectBalanceWidget::resetGamma ()
 {
     if (gamma () == 0) {
         return;
     }
 
     bool sb = signalsBlocked ();
 
     if (!sb) {
         blockSignals (true);
     }
     m_gammaInput->setValue (0);
     recalculateGammaLabel ();
     if (!sb) {
         blockSignals (false);
     }
 
     // Immediate update (if signals aren't blocked)
     Q_EMIT settingsChanged ();
 }
 
 
 // protected slot
 void kpEffectBalanceWidget::resetAll ()
 {
     if (isNoOp ()) {
         return;
     }
 
     // Prevent multiple settingsChanged() which would normally result in
     // redundant, expensive preview repaints
     blockSignals (true);
 
     resetBrightness ();
     resetContrast ();
     resetGamma ();
 
     recalculateGammaLabel ();
 
     blockSignals (false);
 
     Q_EMIT settingsChanged ();
 }
 
 #include "moc_kpEffectBalanceWidget.cpp"