source: tspsg-svn/trunk/src/settingsdialog.cpp @ 131

/*
 *  TSPSG: TSP Solver and Generator
 *  Copyright (C) 2007-2010 Lёppa <contacts[at]oleksii[dot]name>
 *
 *  $Id: settingsdialog.cpp 129 2010-09-03 15:06:43Z laleppa $
 *  $URL: https://tspsg.svn.sourceforge.net/svnroot/tspsg/trunk/src/settingsdialog.cpp $
 *
 *  This file is part of TSPSG.
 *
 *  TSPSG 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  TSPSG 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 TSPSG.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "settingsdialog.h"

/*!
 * \brief Class constructor.
 * \param parent Settings Dialog parent widget.
 *
 * Initializes Settings Dialog and creates its layout based on target OS.
 */
SettingsDialog::SettingsDialog(QWidget *parent)
        : QDialog(parent), _newFont(false), _newColor(false), _translucency(0)
{
        setupUi(this);

        setWindowIcon(QIcon::fromTheme("preferences-system", QIcon(":/images/icons/preferences-system.png")));

        buttonBox->button(QDialogButtonBox::Ok)->setIcon(QIcon::fromTheme("dialog-ok", QIcon(":/images/icons/dialog-ok.png")));
        buttonBox->button(QDialogButtonBox::Ok)->setStatusTip(tr("Save new preferences"));
        buttonBox->button(QDialogButtonBox::Ok)->setCursor(QCursor(Qt::PointingHandCursor));
        buttonBox->button(QDialogButtonBox::Cancel)->setIcon(QIcon::fromTheme("dialog-cancel", QIcon(":/images/icons/dialog-cancel.png")));
        buttonBox->button(QDialogButtonBox::Cancel)->setStatusTip(tr("Close without saving preferences"));
        buttonBox->button(QDialogButtonBox::Cancel)->setCursor(QCursor(Qt::PointingHandCursor));

        buttonColor->setIcon(QIcon::fromTheme("format-text-color", QIcon(":/images/icons/format-text-color.png")));
        buttonFont->setIcon(QIcon::fromTheme("preferences-desktop-font", QIcon(":/images/icons/preferences-desktop-font.png")));
        buttonHelp->setIcon(QIcon::fromTheme("help-hint", QIcon(":/images/icons/help-hint.png")));

QPalette p = bgWhite->palette();
        p.setColor(QPalette::Window, p.color(QPalette::Base));
        bgWhite->setPalette(p);

        p = lineHorizontal->palette();
        p.setColor(QPalette::Window, p.color(QPalette::Text));
        lineHorizontal->setPalette(p);

#ifndef QT_NO_PRINTER
        cbHQGraph = new QCheckBox(bgWhite);
        cbHQGraph->setObjectName("cbHQGraph");
#ifndef QT_NO_STATUSTIP
        cbHQGraph->setStatusTip(tr("Higher quality graph looks much better when printing but uglier on the screen"));
#endif // QT_NO_STATUSTIP
        cbHQGraph->setText(tr("Draw solution graph in higher quality"));
        cbHQGraph->setCursor(QCursor(Qt::PointingHandCursor));

QBoxLayout *box = static_cast<QBoxLayout *>(tabOutput->layout());
QHBoxLayout *hbox1 = new QHBoxLayout();
        hbox1->addSpacing(10);
        hbox1->addWidget(cbHQGraph);
        box->insertLayout(box->indexOf(cbShowGraph) + 1, hbox1);
        connect(cbShowGraph, SIGNAL(toggled(bool)), cbHQGraph, SLOT(setEnabled(bool)));
#endif

#ifdef HANDHELD
QVBoxLayout *vbox1; // Layout helper

#ifdef Q_OS_WINCE_WM
        // On screens with small height when SIP is shown and the window is resized
        // there is not enought space for all elements.
        // So we show the scrollbars to be able to access them.
QScrollArea *scrollArea = new QScrollArea(this);
        scrollArea->setFrameShape(QFrame::NoFrame);
        scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        scrollArea->setWidgetResizable(true);
        scrollArea->setWidget(bgWhite);
#else
        buttons->insertStretch(buttons->indexOf(buttonHelp) + 1);
#endif // Q_OS_WINCE_WM

        bgWhite->layout()->setMargin(0);

        // Central layout
        vbox1 = new QVBoxLayout(this);
        vbox1->setMargin(0);
        vbox1->setSpacing(0);
#ifdef Q_OS_WINCE_WM
        vbox1->addWidget(scrollArea);
#else
        vbox1->addWidget(bgWhite);
#endif // Q_OS_WINCE_WM
        vbox1->addWidget(bgGrey);
        setLayout(vbox1);
#else // HANDHELD
        // Layout helper elements
QVBoxLayout *vbox;
QHBoxLayout *hbox;

#ifdef Q_OS_WIN32
        if (QtWin::isCompositionEnabled()) {
                cbUseTranslucency = new QCheckBox(bgWhite);
                cbUseTranslucency->setObjectName("cbUseTranslucency");
#ifndef QT_NO_STATUSTIP
                cbUseTranslucency->setStatusTip(tr("Use translucent effect on the Main Window under Windows Vista and 7"));
#endif // QT_NO_STATUSTIP
                cbUseTranslucency->setText(tr("Use translucency effects"));
                cbUseTranslucency->setCursor(QCursor(Qt::PointingHandCursor));
        }
#endif // Q_OS_WIN32

        cbSaveState = new QCheckBox(bgWhite);
        cbSaveState->setObjectName("cbSaveState");
#ifndef QT_NO_STATUSTIP
        cbSaveState->setStatusTip(tr("Restore main window state and position on application restart"));
#endif // QT_NO_STATUSTIP
        cbSaveState->setText(tr("Save main window state and position"));
        cbSaveState->setCursor(QCursor(Qt::PointingHandCursor));

        imgIcon = new QLabel(this);
        imgIcon->setObjectName("imgIcon");
        imgIcon->setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Expanding);
        imgIcon->setFrameShape(QFrame::NoFrame);
        imgIcon->setPixmap(QIcon::fromTheme("preferences-system", QIcon(":/images/icons/preferences-system.png")).pixmap(128, 128));
        imgIcon->setStyleSheet("background-color: #0080C0; padding-top: 11px;");
        imgIcon->setAlignment(Qt::AlignTop | Qt::AlignHCenter);
        imgIcon->setMinimumWidth(150);

        labelHint = new QLabel(bgGrey);
        labelHint->setObjectName("labelHint");
        labelHint->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Preferred);
//      labelHint->setMinimumSize(QSize(190,28));
        labelHint->setMinimumSize(QSize(0,28));
        labelHint->setMaximumSize(QSize(QWIDGETSIZE_MAX,28));
        labelHint->setTextFormat(Qt::PlainText);
//      labelHint->setAlignment(Qt::AlignLeft | Qt::AlignTop);
        labelHint->setWordWrap(true);
#ifndef QT_NO_STATUSTIP
        labelHint->setStatusTip(tr("Hover mouse pointer over dialog elements to get additional help"));
#endif // QT_NO_STATUSTIP

        lineVertical = new QFrame(this);
        lineVertical->setObjectName("lineVertical");
        lineVertical->setFrameShadow(QFrame::Plain);
        lineVertical->setFrameShape(QFrame::VLine);
        lineVertical->setLineWidth(2);

        // Top line
        hbox = new QHBoxLayout();
        hbox->addWidget(imgIcon);
        hbox->addWidget(lineVertical);
        hbox->addWidget(bgWhite);

#ifdef QT_NO_PRINTER
QBoxLayout *box;
#endif
        box = static_cast<QBoxLayout *>(tabGeneral->layout());
        box->insertWidget(box->indexOf(cbUseNativeDialogs) + 1, cbSaveState);
#ifdef Q_OS_WIN32
        if (QtWin::isCompositionEnabled())
                box->insertWidget(box->indexOf(cbUseNativeDialogs) + 1, cbUseTranslucency);
#endif // Q_OS_WIN32

        // Inserting label for hints to the bottom part (with grey bg)
        buttons->insertWidget(buttons->indexOf(buttonHelp) + 1, labelHint, 1);

        // Central layout
        vbox = new QVBoxLayout(this);
        vbox->setMargin(0);
        vbox->setSpacing(0);
        vbox->addLayout(hbox);
        vbox->addWidget(bgGrey);
        setLayout(vbox);
#endif // HANDHELD

#ifdef Q_OS_WINCE_WM
        // We need to react to SIP show/hide and resize the window appropriately
        connect(QApplication::desktop(), SIGNAL(workAreaResized(int)), SLOT(desktopResized(int)));
#endif // Q_OS_WINCE_WM
        connect(spinRandMin, SIGNAL(valueChanged(int)), SLOT(spinRandMinValueChanged(int)));
        connect(buttonFont, SIGNAL(clicked()), SLOT(buttonFontClicked()));
        connect(buttonColor, SIGNAL(clicked()), SLOT(buttonColorClicked()));
        setWindowFlags(windowFlags() ^ Qt::WindowContextHelpButtonHint);
#ifndef HANDHELD
        // Setting initial text of dialog hint label to own status tip text.
        labelHint->setText(labelHint->statusTip());
#endif // HANDHELD

        settings = new QSettings(QSettings::IniFormat, QSettings::UserScope, "TSPSG", "tspsg", this);
        settings->remove("SettingsReset");

        cbAutosize->setChecked(settings->value("Autosize", DEF_AUTOSIZE).toBool());
        cbSaveLastUsed->setChecked(settings->value("SaveLastUsed", DEF_SAVE_LAST_USED).toBool());
        cbUseNativeDialogs->setChecked(settings->value("UseNativeDialogs", DEF_USE_NATIVE_DIALOGS).toBool());
#ifdef Q_OS_WIN32
        if (QtWin::isCompositionEnabled())
                cbUseTranslucency->setChecked(settings->value("UseTranslucency", DEF_USE_TRANSLUCENCY).toBool());
#endif // Q_OS_WIN32
#ifndef HANDHELD
        cbSaveState->setChecked(settings->value("SavePos", DEF_SAVEPOS).toBool());
#endif // HANDHELD

        settings->beginGroup("Task");
        cbSymmetricMode->setChecked(settings->value("SymmetricMode", DEF_SYMMETRIC_MODE).toBool());
        spinFractionalAccuracy->setValue(settings->value("FractionalAccuracy", DEF_FRACTIONAL_ACCURACY).toInt());
        spinRandMin->setMaximum(MAX_RAND_VALUE);
        spinRandMin->setValue(settings->value("RandMin",DEF_RAND_MIN).toInt());
        spinRandMax->setMaximum(MAX_RAND_VALUE);
        spinRandMax->setValue(settings->value("RandMax",DEF_RAND_MAX).toInt());
        cbFractionalRandom->setChecked(settings->value("FractionalRandom", DEF_FRACTIONAL_RANDOM).toBool());
        settings->endGroup();

        settings->beginGroup("Output");
        cbShowGraph->setChecked(settings->value("ShowGraph", DEF_SHOW_GRAPH).toBool());

#ifndef QT_NO_PRINTER
        cbHQGraph->setEnabled(cbShowGraph->isChecked());
        cbHQGraph->setChecked(settings->value("HQGraph", DEF_HQ_GRAPH && cbShowGraph->isChecked()).toBool());
#endif

#if !defined(NOSVG) && (QT_VERSION >= 0x040500)
        comboGraphImageFormat->addItem("svg");
#endif // NOSVG && QT_VERSION >= 0x040500
// We create a whitelist of formats, supported by the most popular web browsers according to
//  http://en.wikipedia.org/wiki/Comparison_of_web_browsers#Image_format_support
//  + TIFF format (there are plugins to support it).
QStringList whitelist;
        whitelist << "bmp" << "jpeg" << "png" << "tiff" << "xbm";
        foreach (QByteArray format, QImageWriter::supportedImageFormats()) {
                if (whitelist.contains(format))
                        comboGraphImageFormat->addItem(format);
        }
        comboGraphImageFormat->model()->sort(0);
        comboGraphImageFormat->setCurrentIndex(comboGraphImageFormat->findText(settings->value("GraphImageFormat", DEF_GRAPH_IMAGE_FORMAT).toString(), Qt::MatchFixedString));
        if (comboGraphImageFormat->currentIndex() < 0)
                comboGraphImageFormat->setCurrentIndex(comboGraphImageFormat->findText(DEF_GRAPH_IMAGE_FORMAT, Qt::MatchFixedString));
        labelGraphImageFormat->setEnabled(cbShowGraph->isChecked());
        comboGraphImageFormat->setEnabled(cbShowGraph->isChecked());

        cbShowMatrix->setChecked(settings->value("ShowMatrix", DEF_SHOW_MATRIX).toBool());
        cbCitiesLimit->setEnabled(cbShowMatrix->isChecked());
        cbCitiesLimit->setChecked(settings->value("UseShowMatrixLimit", DEF_USE_SHOW_MATRIX_LIMIT && cbShowMatrix->isChecked()).toBool());
        spinCitiesLimit->setEnabled(cbShowMatrix->isChecked() && cbCitiesLimit->isChecked());
        spinCitiesLimit->setValue(settings->value("ShowMatrixLimit", DEF_SHOW_MATRIX_LIMIT).toInt());
        spinCitiesLimit->setMaximum(MAX_NUM_CITIES);
        cbScrollToEnd->setChecked(settings->value("ScrollToEnd", DEF_SCROLL_TO_END).toBool());

        font = settings->value("Font", QFont(DEF_FONT_FACE, DEF_FONT_SIZE)).value<QFont>();
        color = settings->value("Colors/Text", DEF_TEXT_COLOR).value<QColor>();
        settings->endGroup();

#ifdef HANDHELD
        setWindowState(Qt::WindowMaximized);
#else
        adjustSize();
#endif // Q_OS_WINCE_WM
}

/*!
 * \brief Indicates whether or not the font color has been changed.
 * \return \c true if font color changed, otherwise \c false.
 */
bool SettingsDialog::colorChanged() const
{
        return _newColor;
}

/*!
 * \brief Indicates whether or not the font properties have been changed.
 * \return \c true if font properties changed, otherwise \c false.
 */
bool SettingsDialog::fontChanged() const
{
        return _newFont;
}

/*!
 * \brief Indicates whether and how the translucency setting was changed
 * \retval -1 the translucency was \em disabled.
 * \retval  0 the translucency was <em>not changed</em>.
 * \retval  1 the translucency was \em enabled.
 */
qint8 SettingsDialog::translucencyChanged() const
{
        return _translucency;
}

/* Privates **********************************************************/

void SettingsDialog::accept()
{
        if (QApplication::keyboardModifiers() & Qt::ShiftModifier) {
                if (QMessageBox::question(this, tr("Settings Reset"), tr("Do you really want to <b>reset all application settings to their defaults</b>?"), QMessageBox::RestoreDefaults | QMessageBox::Cancel) == QMessageBox::RestoreDefaults) {
                        _newFont = (font != QFont(DEF_FONT_FACE, DEF_FONT_SIZE));
                        _newColor = (color != DEF_TEXT_COLOR);
                        settings->remove("");
                        settings->setValue("SettingsReset", true);
                        QDialog::accept();
                        QMessageBox::information(this->parentWidget(), tr("Settings Reset"), tr("All settings where successfully reset to their defaults.\nIt is recommended to restart the application now."));
                        return;
                } else
                        return;
        }
        settings->setValue("Autosize", cbAutosize->isChecked());
        settings->setValue("SaveLastUsed", cbSaveLastUsed->isChecked());
        settings->setValue("UseNativeDialogs", cbUseNativeDialogs->isChecked());
#ifdef Q_OS_WIN32
        if (QtWin::isCompositionEnabled()) {
bool old = settings->value("UseTranslucency", DEF_USE_TRANSLUCENCY).toBool();
                if ((!old && cbUseTranslucency->isChecked()) || (old && !cbUseTranslucency->isChecked())) {
                        _translucency = old ? -1 : 1;
                } else
                        _translucency = 0;
                settings->setValue("UseTranslucency", cbUseTranslucency->isChecked());
        }
#endif // Q_OS_WIN32
#ifndef HANDHELD
        settings->setValue("SavePos", cbSaveState->isChecked());
#endif // HANDHELD

        settings->beginGroup("Task");
        settings->setValue("SymmetricMode", cbSymmetricMode->isChecked());
        settings->setValue("FractionalAccuracy", spinFractionalAccuracy->value());
        settings->setValue("RandMin", spinRandMin->value());
        settings->setValue("RandMax", spinRandMax->value());
        settings->setValue("FractionalRandom", cbFractionalRandom->isChecked());
        settings->endGroup();

        settings->beginGroup("Output");
        settings->setValue("ShowGraph", cbShowGraph->isChecked());
#ifndef QT_NO_PRINTER
        settings->setValue("HQGraph", cbShowGraph->isChecked() && cbHQGraph->isChecked());
#endif
        if (cbShowGraph->isChecked()) {
                if (comboGraphImageFormat->currentIndex() >= 0)
                        settings->setValue("GraphImageFormat", comboGraphImageFormat->currentText());
                else
                        settings->setValue("GraphImageFormat", DEF_GRAPH_IMAGE_FORMAT);
        }
        settings->setValue("ShowMatrix", cbShowMatrix->isChecked());
        settings->setValue("UseShowMatrixLimit", cbShowMatrix->isChecked() && cbCitiesLimit->isChecked());
        if (cbCitiesLimit->isChecked())
                settings->setValue("ShowMatrixLimit", spinCitiesLimit->value());
        settings->setValue("ScrollToEnd", cbScrollToEnd->isChecked());
        if (_newFont)
                settings->setValue("Font", font);
        if (_newColor)
                settings->setValue("Colors/Text", color);
        settings->endGroup();
        QDialog::accept();
}

void SettingsDialog::buttonColorClicked()
{
QColor color = QColorDialog::getColor(this->color,this);
        if (color.isValid() && (this->color != color)) {
                this->color = color;
                _newColor = true;
        }
}

void SettingsDialog::buttonFontClicked()
{
bool ok;
QFont font = QFontDialog::getFont(&ok,this->font,this);
        if (ok && (this->font != font)) {
                this->font = font;
                _newFont = true;
        }
}

#ifdef Q_OS_WINCE_WM
void SettingsDialog::desktopResized(int screen)
{
        if (screen != 0)
                return;

QRect availableGeometry = QApplication::desktop()->availableGeometry(0);
        if (currentGeometry != availableGeometry) {
                QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
                /*!
                 * \hack HACK: This hack checks whether \link QDesktopWidget::availableGeometry() availableGeometry()\endlink's \c top + \c hegiht = \link QDesktopWidget::screenGeometry() screenGeometry()\endlink's \c height.
                 *  If \c true, the window gets maximized. If we used \c setGeometry() in this case, the bottom of the
                 *  window would end up being behind the soft buttons. Is this a bug in Qt or Windows Mobile?
                 */
                if ((availableGeometry.top() + availableGeometry.height()) == QApplication::desktop()->screenGeometry().height()) {
                        setWindowState(windowState() | Qt::WindowMaximized);
                } else {
                        if (windowState() & Qt::WindowMaximized)
                                setWindowState(windowState() ^ Qt::WindowMaximized);
                        setGeometry(availableGeometry);
                }
                currentGeometry = availableGeometry;
                QApplication::restoreOverrideCursor();
        }
}

void SettingsDialog::showEvent(QShowEvent *ev)
{
        desktopResized(0);

        QWidget::showEvent(ev);
}
#endif // Q_OS_WINCE_WM

void SettingsDialog::spinRandMinValueChanged(int val) {
        spinRandMax->setMinimum(val);
}

#ifndef HANDHELD
bool SettingsDialog::event(QEvent *ev)
{
        // Checking for StatusTip event and if tip text is not empty string
        // setting it as text of the dialog hint label. Otherwise, setting
        // dialog hint label text to own status tip text.
        if (ev->type() == QEvent::StatusTip) {
QString tip = static_cast<QStatusTipEvent *>(ev)->tip();
                if (tip.length() != 0)
                        labelHint->setText(tip);
                else
                        labelHint->setText(labelHint->statusTip());
                return true;
        } else
                return QDialog::event(ev);
}
#endif // HANDHELD