source: trunk/src/gui/dialogs/qfontdialog.cpp@ 138

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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>

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;

/*!
  \class QFontDialog
  \ingroup dialogs
  \ingroup text
  \mainclass
  \brief The QFontDialog class provides a dialog widget for selecting a font.

    A font dialog is created through one of the static getFont()
    functions.

  Examples:

  \snippet doc/src/snippets/code/src_gui_dialogs_qfontdialog.cpp 0

    The dialog can also be used to set a widget's font directly:
  \snippet doc/src/snippets/code/src_gui_dialogs_qfontdialog.cpp 1
  If the user clicks OK the font they chose will be used for myWidget,
  and if they click Cancel the original font is used.

  \image plastique-fontdialog.png A font dialog in the Plastique widget style.

  \sa QFont, QFontInfo, QFontMetrics, QColorDialog, QFileDialog, QPrintDialog,
      {Standard Dialogs Example}
*/

/*!
    \since 4.5

    Constructs a standard font dialog.

    Use setCurrentFont() to set the initial font attributes.

    The \a parent parameter is passed to the QDialog constructor.

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

/*!
    \since 4.5

    Constructs a standard font dialog with the given \a parent and specified
    \a initial color.
*/
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);

    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);