/***********************************************************************
 *
 * Copyright (C) 2014-2017 wereturtle
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 ***********************************************************************/

#include <QGridLayout>
#include <QLineEdit>
#include <QList>
#include <QLabel>
#include <QDialogButtonBox>
#include <QComboBox>
#include <QFontComboBox>
#include <QFontInfo>

#include "SimpleFontDialog.h"

SimpleFontDialog::SimpleFontDialog(QWidget* parent)
{
    SimpleFontDialog(QFont(), parent);
}

SimpleFontDialog::SimpleFontDialog(const QFont& initial, QWidget* parent)
    : QDialog(parent)
{
    QFontComboBox* fontComboBox = new QFontComboBox(this);
    fontComboBox->setCurrentFont(initial);
    font = initial;

    QVBoxLayout* familyLayout = new QVBoxLayout();
    familyLayout->addWidget(new QLabel(tr("Family")));
    familyLayout->addWidget(fontComboBox);

    QList<int> sizes = QFontDatabase::standardSizes();

    QComboBox* sizeComboBox = new QComboBox(this);
    sizeComboBox->setEditable(true);

    QIntValidator* sizeValidator = new QIntValidator(1, 512, this);
    sizeComboBox->setValidator(sizeValidator);

    int currentSizeIndex = 0;
    QFontInfo fontInfo(initial);
    bool currentFontInserted = false;

    for (int i = 0; i < sizes.size(); i++)
    {
        int size = sizes[i];

        // If the current font size is a non-standard size, then insert
        // it in the appropriate place in the sorted list of fonts.
        //
        if ((fontInfo.pointSize() < size) && !currentFontInserted)
        {
            currentSizeIndex = i;
            sizeComboBox->addItem(QString("%1").arg(fontInfo.pointSize()), fontInfo.pointSize());
            currentFontInserted = true;
        }
        // Else current font size is in the standard font sizes list.  Set
        // the index in the combo box to its position in the list.
        //
        else
        {
            if (fontInfo.pointSize() == size)
            {
                currentSizeIndex = i;
                currentFontInserted = true;
            }
        }

        sizeComboBox->addItem(QString("%1").arg(size), size);
    }

    if (!currentFontInserted)
    {
        sizeComboBox->addItem(QString("%1").arg(fontInfo.pointSize()), fontInfo.pointSize());
        currentSizeIndex = sizeComboBox->count() - 1;
    }

    sizeComboBox->setCurrentIndex(currentSizeIndex);

    QVBoxLayout* sizeLayout = new QVBoxLayout();
    sizeLayout->addWidget(new QLabel(tr("Size")));
    sizeLayout->addWidget(sizeComboBox);

    fontPreview = new QLineEdit(tr("AaBbCcXxYyZz"), this);
    fontPreview->setFont(initial);

    QVBoxLayout* previewLayout = new QVBoxLayout();
    previewLayout->addWidget(new QLabel(tr("Preview")));
    previewLayout->addWidget(fontPreview);

    QDialogButtonBox* buttonBox = new QDialogButtonBox(Qt::Horizontal, this);
    buttonBox->addButton(QDialogButtonBox::Ok);
    buttonBox->addButton(QDialogButtonBox::Cancel);

    QGridLayout* layout = new QGridLayout();
    layout->addItem(familyLayout, 0, 0);
    layout->addItem(sizeLayout, 0, 1);
    layout->addItem(previewLayout, 1, 0, 1, 2, Qt::AlignCenter);
    layout->addWidget(buttonBox, 2, 0, 1, 2);

    setLayout(layout);

    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
    connect(fontComboBox, SIGNAL(currentFontChanged(QFont)), this, SLOT(onFontFamilyChanged(const QFont&)));
    connect(sizeComboBox, SIGNAL(currentIndexChanged(QString)), this, SLOT(onFontSizeChanged(const QString&)));
    connect(sizeComboBox, SIGNAL(editTextChanged(QString)), this, SLOT(onFontSizeChanged(const QString&)));
}

SimpleFontDialog::~SimpleFontDialog()
{

}

QFont SimpleFontDialog::getSelectedFont() const
{
    return font;
}

QFont SimpleFontDialog::getFont
(
    bool* ok,
    const QFont& initial,
    QWidget* parent
)
{
    *ok = false;

    SimpleFontDialog* dlg = new SimpleFontDialog(initial, parent);
    int result = dlg->exec();

    if (QDialog::Accepted == result)
    {
        *ok = true;
    }

    return dlg->getSelectedFont();
}

QFont SimpleFontDialog::getFont(bool* ok, QWidget* parent)
{
    return getFont(ok, QFont(), parent);
}

void SimpleFontDialog::onFontFamilyChanged(const QFont& font)
{
    int size = this->font.pointSize();
    this->font = font;
    this->font.setPointSize(size);
    fontPreview->setFont(this->font);
}

void SimpleFontDialog::onFontSizeChanged(const QString& sizeText)
{
    bool ok = false;
    int size = sizeText.toInt(&ok);

    if (ok)
    {
        font.setPointSize(size);
        fontPreview->setFont(font);
    }
}