qfontdialog.cpp

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#include "qwindowdefs.h"

#ifndef QT_NO_FONTDIALOG

#include "qfontdialog.h"
#include "qfontdialog_p.h"

#include <qapplication.h>
#include <qcheckbox.h>
#include <qcombobox.h>
#include <qevent.h>
#include <qfontdatabase.h>
#include <qgroupbox.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qstyle.h>
#include <qdialogbuttonbox.h>
#include <qheaderview.h>
#include <qlistview.h>
#include <qstringlistmodel.h>
#include <qvalidator.h>
#include <private/qdialog_p.h>
#include <private/qfont_p.h>

#if defined(Q_WS_S60)
#include <QtGui/qdesktopwidget.h>
#endif

QT_BEGIN_NAMESPACE

class QFontListView : public QListView
{
    Q_OBJECT
public:
    QFontListView(QWidget *parent);
    inline QStringListModel *model() const {
        return static_cast<QStringListModel *>(QListView::model());
    }
    inline void setCurrentItem(int item) {
        QListView::setCurrentIndex(static_cast<QAbstractListModel*>(model())->index(item));
    }
    inline int currentItem() const {
        return QListView::currentIndex().row();
    }
    inline int count() const {
        return model()->rowCount();
    }
    inline QString currentText() const {
        int row = QListView::currentIndex().row();
        return row < 0 ? QString() : model()->stringList().at(row);
    }
    void currentChanged(const QModelIndex &current, const QModelIndex &previous) {
        QListView::currentChanged(current, previous);
        if (current.isValid())
            emit highlighted(current.row());
    }
    QString text(int i) const {
        return model()->stringList().at(i);
    }
signals:
    void highlighted(int);
};

QFontListView::QFontListView(QWidget *parent)
    : QListView(parent)
{
    setModel(new QStringListModel(parent));
    setEditTriggers(NoEditTriggers);
}

static const Qt::WindowFlags DefaultWindowFlags =
        Qt::Dialog | Qt::WindowSystemMenuHint;

QFontDialog::QFontDialog(QWidget *parent)
    : QDialog(*new QFontDialogPrivate, parent, DefaultWindowFlags)
{
    Q_D(QFontDialog);
    d->init();
}

QFontDialog::QFontDialog(const QFont &initial, QWidget *parent)
    : QDialog(*new QFontDialogPrivate, parent, DefaultWindowFlags)
{
    Q_D(QFontDialog);
    d->init();
    setCurrentFont(initial);
}

void QFontDialogPrivate::init()
{
    Q_Q(QFontDialog);

#ifdef Q_WS_MAC
    nativeDialogInUse = false;
    delegate = 0;
#endif

    q->setSizeGripEnabled(true);
    q->setWindowTitle(QFontDialog::tr("Select Font"));

    // grid
    familyEdit = new QLineEdit(q);
    familyEdit->setReadOnly(true);
    familyList = new QFontListView(q);
    familyEdit->setFocusProxy(familyList);

    familyAccel = new QLabel(q);
#ifndef QT_NO_SHORTCUT
    familyAccel->setBuddy(familyList);
#endif
    familyAccel->setIndent(2);

    styleEdit = new QLineEdit(q);
    styleEdit->setReadOnly(true);
    styleList = new QFontListView(q);
    styleEdit->setFocusProxy(styleList);

    styleAccel = new QLabel(q);
#ifndef QT_NO_SHORTCUT
    styleAccel->setBuddy(styleList);
#endif
    styleAccel->setIndent(2);

    sizeEdit = new QLineEdit(q);
    sizeEdit->setFocusPolicy(Qt::ClickFocus);
    QIntValidator *validator = new QIntValidator(1, 512, q);
    sizeEdit->setValidator(validator);
    sizeList = new QFontListView(q);

    sizeAccel = new QLabel(q);
#ifndef QT_NO_SHORTCUT
    sizeAccel->setBuddy(sizeEdit);
#endif
    sizeAccel->setIndent(2);

    // effects box
    effects = new QGroupBox(q);
    QVBoxLayout *vbox = new QVBoxLayout(effects);
    strikeout = new QCheckBox(effects);
    vbox->addWidget(strikeout);
    underline = new QCheckBox(effects);
    vbox->addWidget(underline);

    sample = new QGroupBox(q);
    QHBoxLayout *hbox = new QHBoxLayout(sample);
    sampleEdit = new QLineEdit(sample);
    sampleEdit->setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored));
    sampleEdit->setAlignment(Qt::AlignCenter);
    // Note that the sample text is *not* translated with tr(), as the
    // characters used depend on the charset encoding.
    sampleEdit->setText(QLatin1String("AaBbYyZz"));
    hbox->addWidget(sampleEdit);

    writingSystemCombo = new QComboBox(q);

    writingSystemAccel = new QLabel(q);
#ifndef QT_NO_SHORTCUT
    writingSystemAccel->setBuddy(writingSystemCombo);
#endif
    writingSystemAccel->setIndent(2);

    size = 0;
    smoothScalable = false;

    QObject::connect(writingSystemCombo, SIGNAL(activated(int)), q, SLOT(_q_writingSystemHighlighted(int)));
    QObject::connect(familyList, SIGNAL(highlighted(int)), q, SLOT(_q_familyHighlighted(int)));
    QObject::connect(styleList, SIGNAL(highlighted(int)), q, SLOT(_q_styleHighlighted(int)));
    QObject::connect(sizeList, SIGNAL(highlighted(int)), q, SLOT(_q_sizeHighlighted(int)));
    QObject::connect(sizeEdit, SIGNAL(textChanged(QString)), q, SLOT(_q_sizeChanged(QString)));

    QObject::connect(strikeout, SIGNAL(clicked()), q, SLOT(_q_updateSample()));
    QObject::connect(underline, SIGNAL(clicked()), q, SLOT(_q_updateSample()));

    for (int i = 0; i < QFontDatabase::WritingSystemsCount; ++i) {
        QFontDatabase::WritingSystem ws = QFontDatabase::WritingSystem(i);
        QString writingSystemName = QFontDatabase::writingSystemName(ws);
        if (writingSystemName.isEmpty())
            break;
        writingSystemCombo->addItem(writingSystemName);
    }

    updateFamilies();
    if (familyList->count() != 0)
        familyList->setCurrentItem(0);

    // grid layout
    QGridLayout *mainGrid = new QGridLayout(q);

    int spacing = mainGrid->spacing();
    if (spacing >= 0) {     // uniform spacing
       mainGrid->setSpacing(0);

       mainGrid->setColumnMinimumWidth(1, spacing);
       mainGrid->setColumnMinimumWidth(3, spacing);

       int margin = 0;
       mainGrid->getContentsMargins(0, 0, 0, &margin);

       mainGrid->setRowMinimumHeight(3, margin);
       mainGrid->setRowMinimumHeight(6, 2);
       mainGrid->setRowMinimumHeight(8, margin);
    }

    mainGrid->addWidget(familyAccel, 0, 0);
    mainGrid->addWidget(familyEdit, 1, 0);
    mainGrid->addWidget(familyList, 2, 0);

    mainGrid->addWidget(styleAccel, 0, 2);
    mainGrid->addWidget(styleEdit, 1, 2);
    mainGrid->addWidget(styleList, 2, 2);

    mainGrid->addWidget(sizeAccel, 0, 4);
    mainGrid->addWidget(sizeEdit, 1, 4);
    mainGrid->addWidget(sizeList, 2, 4);

    mainGrid->setColumnStretch(0, 38);
    mainGrid->setColumnStretch(2, 24);
    mainGrid->setColumnStretch(4, 10);

    mainGrid->addWidget(effects, 4, 0);

    mainGrid->addWidget(sample, 4, 2, 4, 3);

    mainGrid->addWidget(writingSystemAccel, 5, 0);
    mainGrid->addWidget(writingSystemCombo, 7, 0);

    buttonBox = new QDialogButtonBox(q);
    mainGrid->addWidget(buttonBox, 9, 0, 1, 5);

    QPushButton *button
            = static_cast<QPushButton *>(buttonBox->addButton(QDialogButtonBox::Ok));
    QObject::connect(buttonBox, SIGNAL(accepted()), q, SLOT(accept()));
    button->setDefault(true);

    buttonBox->addButton(QDialogButtonBox::Cancel);
    QObject::connect(buttonBox, SIGNAL(rejected()), q, SLOT(reject()));

#if defined(Q_WS_WINCE)
    q->resize(180, 120);
#elif defined(Q_WS_S60)
    q->resize(QApplication::desktop()->availableGeometry(QCursor::pos()).size());
#else
    q->resize(500, 360);
#endif // Q_WS_WINCE

    sizeEdit->installEventFilter(q);
    familyList->installEventFilter(q);
    styleList->installEventFilter(q);
    sizeList->installEventFilter(q);

    familyList->setFocus();
    retranslateStrings();
}

QFontDialog::~QFontDialog()
{
#ifdef Q_WS_MAC
    Q_D(QFontDialog);
    if (d->delegate) {
        d->closeCocoaFontPanel();
        return;
    }
#endif
}

QFont QFontDialog::getFont(bool *ok, const QFont &initial, QWidget *parent, const QString &title,
                           FontDialogOptions options)
{
    return QFontDialogPrivate::getFont(ok, initial, parent, title, options);
}

QFont QFontDialog::getFont(bool *ok, const QFont &initial, QWidget *parent, const QString &title)
{
    return QFontDialogPrivate::getFont(ok, initial, parent, title, 0);
}

QFont QFontDialog::getFont(bool *ok, const QFont &initial, QWidget *parent)
{
    return QFontDialogPrivate::getFont(ok, initial, parent, QString(), 0);
}

QFont QFontDialog::getFont(bool *ok, QWidget *parent)
{
    QFont initial;
    return QFontDialogPrivate::getFont(ok, initial, parent, QString(), 0);
}

QFont QFontDialogPrivate::getFont(bool *ok, const QFont &initial, QWidget *parent,
                                  const QString &title, QFontDialog::FontDialogOptions options)
{
    QFontDialog dlg(parent);
    dlg.setOptions(options);
    dlg.setCurrentFont(initial);
    if (!title.isEmpty())
        dlg.setWindowTitle(title);

    int ret = (dlg.exec() || (options & QFontDialog::NoButtons));
    if (ok)
        *ok = !!ret;
    if (ret) {
        return dlg.selectedFont();
    } else {
        return initial;
    }
}

bool QFontDialog::eventFilter(QObject *o , QEvent *e)
{
    Q_D(QFontDialog);
    if (e->type() == QEvent::KeyPress) {
        QKeyEvent *k = (QKeyEvent *)e;
        if (o == d->sizeEdit &&
        (k->key() == Qt::Key_Up ||
             k->key() == Qt::Key_Down ||
         k->key() == Qt::Key_PageUp ||
         k->key() == Qt::Key_PageDown)) {

            int ci = d->sizeList->currentItem();
            (void)QApplication::sendEvent(d->sizeList, k);

            if (ci != d->sizeList->currentItem()
                    && style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, this))
                d->sizeEdit->selectAll();
            return true;
        } else if ((o == d->familyList || o == d->styleList) &&
                    (k->key() == Qt::Key_Return || k->key() == Qt::Key_Enter)) {
            k->accept();
        accept();
            return true;
        }
    } else if (e->type() == QEvent::FocusIn
               && style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, this)) {
        if (o == d->familyList)
            d->familyEdit->selectAll();
        else if (o == d->styleList)
            d->styleEdit->selectAll();
        else if (o == d->sizeList)
            d->sizeEdit->selectAll();
    } else if (e->type() == QEvent::MouseButtonPress && o == d->sizeList) {
            d->sizeEdit->setFocus();
    }
    return QDialog::eventFilter(o, e);
}

/*
    Updates the contents of the "font family" list box. This
    function can be reimplemented if you have special requirements.
*/

void QFontDialogPrivate::updateFamilies()
{
    Q_Q(QFontDialog);

    enum match_t { MATCH_NONE = 0, MATCH_LAST_RESORT = 1, MATCH_APP = 2, MATCH_FAMILY = 3 };

    QStringList familyNames = fdb.families(writingSystem);

    familyList->model()->setStringList(familyNames);

    QString foundryName1, familyName1, foundryName2, familyName2;
    int bestFamilyMatch = -1;
    match_t bestFamilyType = MATCH_NONE;

    QFont f;

    // ##### do the right thing for a list of family names in the font.
    QFontDatabase::parseFontName(family, foundryName1, familyName1);

    QStringList::const_iterator it = familyNames.constBegin();
    int i = 0;
    for(; it != familyNames.constEnd(); ++it, ++i) {
        QFontDatabase::parseFontName(*it, foundryName2, familyName2);

        //try to match...
        if (familyName1 == familyName2) {
            bestFamilyType = MATCH_FAMILY;
            if (foundryName1 == foundryName2) {
                bestFamilyMatch = i;
                break;
            }
            if (bestFamilyMatch < MATCH_FAMILY)
                bestFamilyMatch = i;
        }

        //and try some fall backs
        match_t type = MATCH_NONE;
        if (bestFamilyType <= MATCH_NONE && familyName2 == f.lastResortFamily())
            type = MATCH_LAST_RESORT;
        if (bestFamilyType <= MATCH_LAST_RESORT && familyName2 == f.family())
            type = MATCH_APP;
        // ### add fallback for writingSystem
        if (type != MATCH_NONE) {
            bestFamilyType = type;
            bestFamilyMatch = i;
        }
    }

    if (i != -1 && bestFamilyType != MATCH_NONE)
        familyList->setCurrentItem(bestFamilyMatch);
    else
        familyList->setCurrentItem(0);
    familyEdit->setText(familyList->currentText());
    if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
            && familyList->hasFocus())
        familyEdit->selectAll();

    updateStyles();
}

/*
    Updates the contents of the "font style" list box. This
    function can be reimplemented if you have special requirements.
*/
void QFontDialogPrivate::updateStyles()
{
    Q_Q(QFontDialog);
    QStringList styles = fdb.styles(familyList->currentText());
    styleList->model()->setStringList(styles);

    if (styles.isEmpty()) {
        styleEdit->clear();
        smoothScalable = false;
    } else {
        if (!style.isEmpty()) {
            bool found = false;
            bool first = true;
            QString cstyle = style;

        redo:
            for (int i = 0; i < (int)styleList->count(); i++) {
                if (cstyle == styleList->text(i)) {
                     styleList->setCurrentItem(i);
                     found = true;
                     break;
                 }
            }
            if (!found && first) {
                if (cstyle.contains(QLatin1String("Italic"))) {
                    cstyle.replace(QLatin1String("Italic"), QLatin1String("Oblique"));
                    first = false;
                    goto redo;
                } else if (cstyle.contains(QLatin1String("Oblique"))) {
                    cstyle.replace(QLatin1String("Oblique"), QLatin1String("Italic"));
                    first = false;
                    goto redo;
                }
            }
            if (!found)
                styleList->setCurrentItem(0);
        } else {
            styleList->setCurrentItem(0);
        }

        styleEdit->setText(styleList->currentText());
        if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
                && styleList->hasFocus())
            styleEdit->selectAll();

        smoothScalable = fdb.isSmoothlyScalable(familyList->currentText(), styleList->currentText());
    }

    updateSizes();
}

void QFontDialogPrivate::updateSizes()
{
    Q_Q(QFontDialog);

    if (!familyList->currentText().isEmpty()) {
        QList<int> sizes = fdb.pointSizes(familyList->currentText(), styleList->currentText());

        int i = 0;
        int current = -1;
        QStringList str_sizes;
        for(QList<int>::const_iterator it = sizes.constBegin(); it != sizes.constEnd(); ++it) {
            str_sizes.append(QString::number(*it));
            if (current == -1 && *it >= size)
                current = i;
            ++i;
        }
        sizeList->model()->setStringList(str_sizes);
        if (current == -1) {
            // we request a size bigger than the ones in the list, select the biggest one
            current = sizeList->count() - 1;
        }
        sizeList->setCurrentItem(current);

        sizeEdit->blockSignals(true);
        sizeEdit->setText((smoothScalable ? QString::number(size) : sizeList->currentText()));
        if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
                && sizeList->hasFocus())
            sizeEdit->selectAll();
        sizeEdit->blockSignals(false);
    } else {
        sizeEdit->clear();
    }

    _q_updateSample();
}

void QFontDialogPrivate::_q_updateSample()
{
    // compute new font
    int pSize = sizeEdit->text().toInt();
    QFont newFont(fdb.font(familyList->currentText(), style, pSize));
    newFont.setStrikeOut(strikeout->isChecked());
    newFont.setUnderline(underline->isChecked());

    if (familyList->currentText().isEmpty())
        sampleEdit->clear();

    updateSampleFont(newFont);
}

void QFontDialogPrivate::updateSampleFont(const QFont &newFont)
{
    Q_Q(QFontDialog);
    if (newFont != sampleEdit->font()) {
        sampleEdit->setFont(newFont);
        emit q->currentFontChanged(newFont);
    }
}

void QFontDialogPrivate::_q_writingSystemHighlighted(int index)
{
    writingSystem = QFontDatabase::WritingSystem(index);
    sampleEdit->setText(fdb.writingSystemSample(writingSystem));
    updateFamilies();
}

void QFontDialogPrivate::_q_familyHighlighted(int i)
{
    Q_Q(QFontDialog);
    family = familyList->text(i);
    familyEdit->setText(family);
    if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
            && familyList->hasFocus())
        familyEdit->selectAll();

    updateStyles();
}


void QFontDialogPrivate::_q_styleHighlighted(int index)
{
    Q_Q(QFontDialog);
    QString s = styleList->text(index);
    styleEdit->setText(s);
    if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
            && styleList->hasFocus())
        styleEdit->selectAll();

    style = s;

    updateSizes();
}


void QFontDialogPrivate::_q_sizeHighlighted(int index)
{
    Q_Q(QFontDialog);
    QString s = sizeList->text(index);
    sizeEdit->setText(s);
    if (q->style()->styleHint(QStyle::SH_FontDialog_SelectAssociatedText, 0, q)
            && sizeEdit->hasFocus())
        sizeEdit->selectAll();

    size = s.toInt();
    _q_updateSample();
}

void QFontDialogPrivate::_q_sizeChanged(const QString &s)
{
    // no need to check if the conversion is valid, since we have an QIntValidator in the size edit
    int size = s.toInt();
    if (this->size == size)
        return;

    this->size = size;
    if (sizeList->count() != 0) {
        int i;
        for (i = 0; i < sizeList->count() - 1; i++) {
            if (sizeList->text(i).toInt() >= this->size)
                break;
        }
        sizeList->blockSignals(true);
        sizeList->setCurrentItem(i);
        sizeList->blockSignals(false);
    }
    _q_updateSample();
}

void QFontDialogPrivate::retranslateStrings()
{
    familyAccel->setText(QFontDialog::tr("&Font"));
    styleAccel->setText(QFontDialog::tr("Font st&yle"));
    sizeAccel->setText(QFontDialog::tr("&Size"));
#ifndef Q_WS_S60
    // Removed the title due to lack of screen estate in small S60 screen.
    // The effects are descriptive without a title (strikeout, underline).
    effects->setTitle(QFontDialog::tr("Effects"));
#endif
    strikeout->setText(QFontDialog::tr("Stri&keout"));
    underline->setText(QFontDialog::tr("&Underline"));
    sample->setTitle(QFontDialog::tr("Sample"));
    writingSystemAccel->setText(QFontDialog::tr("Wr&iting System"));
}

void QFontDialog::changeEvent(QEvent *e)
{
    Q_D(QFontDialog);
    if (e->type() == QEvent::LanguageChange) {
        d->retranslateStrings();
    }
    QDialog::changeEvent(e);
}

void QFontDialog::setCurrentFont(const QFont &font)
{
    Q_D(QFontDialog);
    d->family = font.family();
    d->style = d->fdb.styleString(font);
    d->size = font.pointSize();
    if (d->size == -1) {
        QFontInfo fi(font);
        d->size = fi.pointSize();
    }
    d->strikeout->setChecked(font.strikeOut());
    d->underline->setChecked(font.underline());
    d->updateFamilies();

#ifdef Q_WS_MAC
    if (d->delegate)
        QFontDialogPrivate::setFont(d->delegate, font);
#endif
}

QFont QFontDialog::currentFont() const
{
    Q_D(const QFontDialog);
    return d->sampleEdit->font();
}

QFont QFontDialog::selectedFont() const
{
    Q_D(const QFontDialog);
    return d->selectedFont;
}

void QFontDialog::setOption(FontDialogOption option, bool on)
{
    Q_D(QFontDialog);
    if (!(d->opts & option) != !on)
        setOptions(d->opts ^ option);
}

bool QFontDialog::testOption(FontDialogOption option) const
{
    Q_D(const QFontDialog);
    return (d->opts & option) != 0;
}

void QFontDialog::setOptions(FontDialogOptions options)
{
    Q_D(QFontDialog);

    FontDialogOptions changed = (options ^ d->opts);
    if (!changed)
        return;

    d->opts = options;
    d->buttonBox->setVisible(!(options & NoButtons));
}

QFontDialog::FontDialogOptions QFontDialog::options() const
{
    Q_D(const QFontDialog);
    return d->opts;
}

#ifdef Q_WS_MAC
// can only have one Cocoa font panel active
bool QFontDialogPrivate::sharedFontPanelAvailable = true;
#endif

void QFontDialog::open(QObject *receiver, const char *member)
{
    Q_D(QFontDialog);
    connect(this, SIGNAL(fontSelected(QFont)), receiver, member);
    d->receiverToDisconnectOnClose = receiver;
    d->memberToDisconnectOnClose = member;
    QDialog::open();
}

void QFontDialog::setVisible(bool visible)
{
    if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden) != visible)
        return;
#ifdef Q_WS_MAC
    Q_D(QFontDialog);
    if (d->canBeNativeDialog()){
        if (d->setVisible_sys(visible)){
            d->nativeDialogInUse = true;
            // Set WA_DontShowOnScreen so that QDialog::setVisible(visible) below
            // updates the state correctly, but skips showing the non-native version:
            setAttribute(Qt::WA_DontShowOnScreen, true);
        } else {
            d->nativeDialogInUse = false;
            setAttribute(Qt::WA_DontShowOnScreen, false);
        }
    }
#endif // Q_WS_MAC
    QDialog::setVisible(visible);
}

void QFontDialog::done(int result)
{
    Q_D(QFontDialog);
    QDialog::done(result);
    if (result == Accepted) {
        // We check if this is the same font we had before, if so we emit currentFontChanged
        QFont selectedFont = currentFont();
        if(selectedFont != d->selectedFont)
            emit(currentFontChanged(selectedFont));
        d->selectedFont = selectedFont;
        emit fontSelected(d->selectedFont);
    } else
        d->selectedFont = QFont();
    if (d->receiverToDisconnectOnClose) {
        disconnect(this, SIGNAL(fontSelected(QFont)),
                   d->receiverToDisconnectOnClose, d->memberToDisconnectOnClose);
        d->receiverToDisconnectOnClose = 0;
    }
    d->memberToDisconnectOnClose.clear();
}

#ifdef Q_WS_MAC
bool QFontDialogPrivate::canBeNativeDialog()
{
    Q_Q(QFontDialog);
    if (nativeDialogInUse)
        return true;
    if (q->testAttribute(Qt::WA_DontShowOnScreen))
        return false;
    if (opts & QFontDialog::DontUseNativeDialog)
        return false;

    QLatin1String staticName(QFontDialog::staticMetaObject.className());
    QLatin1String dynamicName(q->metaObject()->className());
    return (staticName == dynamicName);
}
#endif // Q_WS_MAC

QT_END_NAMESPACE

#include "qfontdialog.moc"
#include "moc_qfontdialog.cpp"

#endif // QT_NO_FONTDIALOG