File indexing completed on 2024-05-12 05:35:43

 /*
     kcmmisc.cpp
 
     SPDX-FileCopyrightText: 1997 Patrick Dowler <dowler@morgul.fsh.uvic.ca>
 
     Layout management, cleanups:
     SPDX-FileCopyrightText: 1999 Dirk A. Mueller <dmuell@gmx.net>
 
     SPDX-FileCopyrightText: 2021 Cyril Rossi <cyril.rossi@enioka.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "kcmmisc.h"
 #include "keyboardmiscsettings.h"
 #include "ui_kcmmiscwidget.h"
 
 #include <QButtonGroup>
 #include <QCheckBox>
 #include <QDoubleSpinBox>
 #include <QSpinBox>
 #include <QWhatsThis>
 #include <QtGui/private/qtx11extras_p.h>
 
 #include <KConfig>
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KSharedConfig>
 
 #include <X11/Xlib.h>
 #include <cmath>
 
 namespace
 {
 bool hasAccentSupport()
 {
     static bool isPlasmaIM = (qgetenv("QT_IM_MODULE") == "plasmaim");
     return isPlasmaIM;
 }
 }
 
 KCMiscKeyboardWidget::KCMiscKeyboardWidget(QWidget *parent, KeyboardMiscSettings *settings)
     : QWidget(parent)
     , ui(*new Ui_KeyboardConfigWidget)
     , m_settings(settings)
 {
     ui.setupUi(this);
 
     ui.kcfg_repeatDelay->setSingleStep(50);
     ui.kcfg_repeatRate->setSingleStep(5);
 
     sliderMax = (int)floor(0.5 + 2 * (log(5000.0L) - log(100.0L)) / (log(5000.0L) - log(4999.0L)));
     ui.delaySlider->setRange(0, sliderMax);
     ui.delaySlider->setSingleStep(sliderMax / 100);
     ui.delaySlider->setPageStep(sliderMax / 10);
     ui.delaySlider->setTickInterval(sliderMax / 10);
 
     ui.rateSlider->setRange(20, 10000);
     ui.rateSlider->setSingleStep(30);
     ui.rateSlider->setPageStep(500);
     ui.rateSlider->setTickInterval(498);
 
     connect(ui.kcfg_repeatDelay, SIGNAL(valueChanged(int)), this, SLOT(delaySpinboxChanged(int)));
     connect(ui.delaySlider, &QAbstractSlider::valueChanged, this, &KCMiscKeyboardWidget::delaySliderChanged);
     connect(ui.kcfg_repeatRate, SIGNAL(valueChanged(double)), this, SLOT(rateSpinboxChanged(double)));
     connect(ui.rateSlider, &QAbstractSlider::valueChanged, this, &KCMiscKeyboardWidget::rateSliderChanged);
 
     _numlockButtonGroup = new QButtonGroup(ui.numlockButtonGroup);
     _numlockButtonGroup->addButton(ui.radioButton1, 0);
     _numlockButtonGroup->addButton(ui.radioButton2, 1);
     _numlockButtonGroup->addButton(ui.radioButton3, 2);
 
     connect(_numlockButtonGroup, &QButtonGroup::idClicked, this, qOverload<>(&KCMiscKeyboardWidget::changed));
 
     _keyboardRepeatButtonGroup = new QButtonGroup(ui.repeatFormLayout);
     if (hasAccentSupport()) {
         _keyboardRepeatButtonGroup->addButton(ui.accentMenuRadioButton, 0);
     } else {
         ui.accentMenuRadioButton->setVisible(false);
     }
     _keyboardRepeatButtonGroup->addButton(ui.repeatRadioButton, 1);
     _keyboardRepeatButtonGroup->addButton(ui.nothingRadioButton, 2);
 
     connect(_keyboardRepeatButtonGroup, &QButtonGroup::idClicked, this, qOverload<>(&KCMiscKeyboardWidget::changed));
     connect(_keyboardRepeatButtonGroup, &QButtonGroup::idClicked, this, &KCMiscKeyboardWidget::keyboardRepeatStateChanged);
 
     connect(_numlockButtonGroup, qOverload<QAbstractButton *>(&QButtonGroup::buttonClicked), this, &KCMiscKeyboardWidget::updateUiDefaultIndicator);
     connect(_keyboardRepeatButtonGroup, qOverload<QAbstractButton *>(&QButtonGroup::buttonClicked), this, &KCMiscKeyboardWidget::updateUiDefaultIndicator);
 }
 
 KCMiscKeyboardWidget::~KCMiscKeyboardWidget()
 {
     delete &ui;
 }
 
 // set the slider and LCD values
 void KCMiscKeyboardWidget::setRepeat(KeyBehaviour keyboardRepeat, int delay_, double rate_)
 {
     _keyboardRepeatButtonGroup->button(keyboardRepeat)->click();
 
     delaySpinboxChanged(delay_);
     rateSpinboxChanged(rate_);
 }
 
 TriState TriStateHelper::getTriState(const QButtonGroup *group)
 {
     int selected = group->checkedId();
     return selected < 0 ? STATE_UNCHANGED : getTriState(selected);
 }
 
 void TriStateHelper::setTriState(QButtonGroup *group, TriState state)
 {
     group->button(getInt(state))->click();
 }
 
 void KCMiscKeyboardWidget::load()
 {
     // need to read as string to support old "true/false" parameter
     QString key = m_settings->keyboardRepeat();
     if (key == QLatin1String("true") || key == TriStateHelper::getString(STATE_ON) || key == QLatin1String("accent")) {
         keyboardRepeat = KeyBehaviour::AccentMenu;
     } else if (key == QLatin1String("false") || key == TriStateHelper::getString(STATE_OFF) || key == QLatin1String("nothing")) {
         keyboardRepeat = KeyBehaviour::DoNothing;
     } else if (key == QLatin1String("repeat")) {
         keyboardRepeat = KeyBehaviour::RepeatKey;
     }
     setRepeat(keyboardRepeat, m_settings->repeatDelay(), m_settings->repeatRate());
 
     numlockState = TriStateHelper::getTriState(m_settings->numLock());
     TriStateHelper::setTriState(_numlockButtonGroup, numlockState);
 }
 
 void KCMiscKeyboardWidget::save()
 {
     numlockState = TriStateHelper::getTriState(_numlockButtonGroup);
     keyboardRepeat = KeyBehaviour(_keyboardRepeatButtonGroup->checkedId());
 
     m_settings->setKeyboardRepeat(keybehaviourNames[keyboardRepeat]);
     m_settings->setNumLock(TriStateHelper::getInt(numlockState));
 }
 
 void KCMiscKeyboardWidget::defaults()
 {
     setRepeat(defaultValueKeyboardRepeat(), m_settings->defaultRepeatDelayValue(), m_settings->defaultRepeatRateValue());
     TriStateHelper::setTriState(_numlockButtonGroup, static_cast<TriState>(m_settings->defaultNumLockValue()));
     Q_EMIT changed(true);
 }
 
 QString KCMiscKeyboardWidget::quickHelp() const
 {
     return QString();
 
     /* "<h1>Keyboard</h1> This module allows you to choose options"
        " for the way in which your keyboard works. The actual effect of"
        " setting these options depends upon the features provided by your"
        " keyboard hardware and the X server on which Plasma is running.<p>"
        " For example, you may find that changing the key click volume"
        " has no effect because this feature is not available on your system." */
 }
 
 bool KCMiscKeyboardWidget::isSaveNeeded() const
 {
     return m_settings->keyboardRepeat() != keybehaviourNames[KeyBehaviour(_keyboardRepeatButtonGroup->checkedId())]
         || m_settings->numLock() != TriStateHelper::getInt(TriStateHelper::getTriState(_numlockButtonGroup));
 }
 
 bool KCMiscKeyboardWidget::isDefault() const
 {
     return defaultValueKeyboardRepeat() == KeyBehaviour(_keyboardRepeatButtonGroup->checkedId())
         && m_settings->defaultNumLockValue() == TriStateHelper::getInt(TriStateHelper::getTriState(_numlockButtonGroup));
 }
 
 void KCMiscKeyboardWidget::setDefaultIndicator(bool visible)
 {
     m_highlightVisible = visible;
     updateUiDefaultIndicator();
 }
 
 void KCMiscKeyboardWidget::updateUiDefaultIndicator()
 {
     const auto isNumLockDefault = m_settings->defaultNumLockValue() == TriStateHelper::getInt(TriStateHelper::getTriState(_numlockButtonGroup));
     for (auto button : _numlockButtonGroup->buttons()) {
         setDefaultIndicatorVisible(button, m_highlightVisible && !isNumLockDefault && _numlockButtonGroup->checkedButton() == button);
     }
 
     const auto isKeyboardRepeatDefault = defaultValueKeyboardRepeat() == KeyBehaviour(_keyboardRepeatButtonGroup->checkedId());
     for (auto button : _keyboardRepeatButtonGroup->buttons()) {
         setDefaultIndicatorVisible(button, m_highlightVisible && !isKeyboardRepeatDefault && _keyboardRepeatButtonGroup->checkedButton() == button);
     }
 
     setDefaultIndicatorVisible(ui.delaySlider, m_highlightVisible && ui.kcfg_repeatDelay->value() != m_settings->defaultRepeatDelayValue());
     setDefaultIndicatorVisible(ui.rateSlider, m_highlightVisible && ui.kcfg_repeatRate->value() != m_settings->defaultRepeatRateValue());
 }
 
 void KCMiscKeyboardWidget::delaySliderChanged(int value)
 {
     double alpha = sliderMax / (log(5000.0L) - log(100.0L));
     double linearValue = exp(value / alpha + log(100.0L));
 
     ui.kcfg_repeatDelay->setValue((int)floor(0.5 + linearValue));
     updateUiDefaultIndicator();
 
     Q_EMIT changed(true);
 }
 
 void KCMiscKeyboardWidget::delaySpinboxChanged(int value)
 {
     double alpha = sliderMax / (log(5000.0L) - log(100.0L));
     double logVal = alpha * (log((double)value) - log(100.0L));
 
     ui.delaySlider->setValue((int)floor(0.5 + logVal));
 
     Q_EMIT changed(true);
 }
 
 void KCMiscKeyboardWidget::rateSliderChanged(int value)
 {
     ui.kcfg_repeatRate->setValue(value / 100.0);
     updateUiDefaultIndicator();
 
     Q_EMIT changed(true);
 }
 
 void KCMiscKeyboardWidget::rateSpinboxChanged(double value)
 {
     ui.rateSlider->setValue((int)(value * 100));
     Q_EMIT changed(true);
 }
 
 void KCMiscKeyboardWidget::changed()
 {
     Q_EMIT changed(true);
 }
 
 void KCMiscKeyboardWidget::keyboardRepeatStateChanged(int selection)
 {
     ui.keyboardRepeatParamsGroupBox->setVisible(selection == KeyBehaviour::RepeatKey);
     changed();
 }
 
 void KCMiscKeyboardWidget::setDefaultIndicatorVisible(QWidget *widget, bool visible)
 {
     widget->setProperty("_kde_highlight_neutral", visible);
     widget->update();
 }
 
 KeyBehaviour KCMiscKeyboardWidget::defaultValueKeyboardRepeat() const
 {
     if (m_settings->defaultKeyboardRepeatValue() == keybehaviourNames[KeyBehaviour::AccentMenu] && !hasAccentSupport()) {
         return KeyBehaviour::RepeatKey;
     }
 
     const auto keys = keybehaviourNames.keys();
     auto defaultRepeat = std::find_if(keys.constBegin(), keys.constEnd(), [=, this](const KeyBehaviour &key) {
         return keybehaviourNames[key] == m_settings->defaultKeyboardRepeatValue();
     });
 
     return *defaultRepeat;
 }