/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the tools applications of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qtpropertybrowserutils_p.h"

#include <QtGui/QApplication>

#include <QtGui/QPainter>

#include <QtGui/QHBoxLayout>

#include <QtGui/QMouseEvent>

#include <QtGui/QCheckBox>

#include <QtGui/QLineEdit>

#include <QtGui/QMenu>

QT_BEGIN_NAMESPACE

QtCursorDatabase::QtCursorDatabase()

{

    appendCursor(Qt::ArrowCursor, QApplication::translate("QtCursorDatabase", "Arrow", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-arrow.png")));

    appendCursor(Qt::UpArrowCursor, QApplication::translate("QtCursorDatabase", "Up Arrow", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-uparrow.png")));

    appendCursor(Qt::CrossCursor, QApplication::translate("QtCursorDatabase", "Cross", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-cross.png")));

    appendCursor(Qt::WaitCursor, QApplication::translate("QtCursorDatabase", "Wait", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-wait.png")));

    appendCursor(Qt::IBeamCursor, QApplication::translate("QtCursorDatabase", "IBeam", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-ibeam.png")));

    appendCursor(Qt::SizeVerCursor, QApplication::translate("QtCursorDatabase", "Size Vertical", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-sizev.png")));

    appendCursor(Qt::SizeHorCursor, QApplication::translate("QtCursorDatabase", "Size Horizontal", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-sizeh.png")));

    appendCursor(Qt::SizeFDiagCursor, QApplication::translate("QtCursorDatabase", "Size Backslash", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-sizef.png")));

    appendCursor(Qt::SizeBDiagCursor, QApplication::translate("QtCursorDatabase", "Size Slash", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-sizeb.png")));

    appendCursor(Qt::SizeAllCursor, QApplication::translate("QtCursorDatabase", "Size All", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-sizeall.png")));

    appendCursor(Qt::BlankCursor, QApplication::translate("QtCursorDatabase", "Blank", 0,

                        QApplication::UnicodeUTF8), QIcon());

    appendCursor(Qt::SplitVCursor, QApplication::translate("QtCursorDatabase", "Split Vertical", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-vsplit.png")));

    appendCursor(Qt::SplitHCursor, QApplication::translate("QtCursorDatabase", "Split Horizontal", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-hsplit.png")));

    appendCursor(Qt::PointingHandCursor, QApplication::translate("QtCursorDatabase", "Pointing Hand", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-hand.png")));

    appendCursor(Qt::ForbiddenCursor, QApplication::translate("QtCursorDatabase", "Forbidden", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-forbidden.png")));

    appendCursor(Qt::OpenHandCursor, QApplication::translate("QtCursorDatabase", "Open Hand", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-openhand.png")));

    appendCursor(Qt::ClosedHandCursor, QApplication::translate("QtCursorDatabase", "Closed Hand", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-closedhand.png")));

    appendCursor(Qt::WhatsThisCursor, QApplication::translate("QtCursorDatabase", "What's This", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-whatsthis.png")));

    appendCursor(Qt::BusyCursor, QApplication::translate("QtCursorDatabase", "Busy", 0,

                        QApplication::UnicodeUTF8), QIcon(QLatin1String(":/trolltech/qtpropertybrowser/images/cursor-busy.png")));

}

void QtCursorDatabase::appendCursor(Qt::CursorShape shape, const QString &name, const QIcon &icon)

{

    if (m_cursorShapeToValue.contains(shape))

        return;

    int value = m_cursorNames.count();

    m_cursorNames.append(name);

    m_cursorIcons[value] = icon;

    m_valueToCursorShape[value] = shape;

    m_cursorShapeToValue[shape] = value;

}

QStringList QtCursorDatabase::cursorShapeNames() const

{

    return m_cursorNames;

}

QMap<int, QIcon> QtCursorDatabase::cursorShapeIcons() const

{

    return m_cursorIcons;

}

QString QtCursorDatabase::cursorToShapeName(const QCursor &cursor) const

{

    int val = cursorToValue(cursor);

    if (val >= 0)

        return m_cursorNames.at(val);

    return QString();

}

QIcon QtCursorDatabase::cursorToShapeIcon(const QCursor &cursor) const

{

    int val = cursorToValue(cursor);

    return m_cursorIcons.value(val);

}

int QtCursorDatabase::cursorToValue(const QCursor &cursor) const

{

#ifndef QT_NO_CURSOR

    Qt::CursorShape shape = cursor.shape();

    if (m_cursorShapeToValue.contains(shape))

        return m_cursorShapeToValue[shape];

#endif

    return -1;

}

#ifndef QT_NO_CURSOR

QCursor QtCursorDatabase::valueToCursor(int value) const

{

    if (m_valueToCursorShape.contains(value))

        return QCursor(m_valueToCursorShape[value]);

    return QCursor();

}

#endif

QPixmap QtPropertyBrowserUtils::brushValuePixmap(const QBrush &b)

{

    QImage img(16, 16, QImage::Format_ARGB32_Premultiplied);

    img.fill(0);

    QPainter painter(&img);

    painter.setCompositionMode(QPainter::CompositionMode_Source);

    painter.fillRect(0, 0, img.width(), img.height(), b);

    QColor color = b.color();

    if (color.alpha() != 255) { // indicate alpha by an inset

        QBrush  opaqueBrush = b;

        color.setAlpha(255);

        opaqueBrush.setColor(color);

        painter.fillRect(img.width() / 4, img.height() / 4,

                         img.width() / 2, img.height() / 2, opaqueBrush);

    }

    painter.end();

    return QPixmap::fromImage(img);

}

QIcon QtPropertyBrowserUtils::brushValueIcon(const QBrush &b)

{

    return QIcon(brushValuePixmap(b));

}

QString QtPropertyBrowserUtils::colorValueText(const QColor &c)

{

    return QApplication::translate("QtPropertyBrowserUtils", "[%1, %2, %3] (%4)", 0, QApplication::UnicodeUTF8)

                                  .arg(QString::number(c.red()))

                                  .arg(QString::number(c.green()))

                                  .arg(QString::number(c.blue()))

                                  .arg(QString::number(c.alpha()));

}

QPixmap QtPropertyBrowserUtils::fontValuePixmap(const QFont &font)

{

    QFont f = font;

    QImage img(16, 16, QImage::Format_ARGB32_Premultiplied);

    img.fill(0);

    QPainter p(&img);

    p.setRenderHint(QPainter::TextAntialiasing, true);

    p.setRenderHint(QPainter::Antialiasing, true);

    f.setPointSize(13);

    p.setFont(f);

    QTextOption t;

    t.setAlignment(Qt::AlignCenter);

    p.drawText(QRect(0, 0, 16, 16), QString(QLatin1Char('A')), t);

    return QPixmap::fromImage(img);

}

QIcon QtPropertyBrowserUtils::fontValueIcon(const QFont &f)

{

    return QIcon(fontValuePixmap(f));

}

QString QtPropertyBrowserUtils::fontValueText(const QFont &f)

{

    return QApplication::translate("QtPropertyBrowserUtils", "[%1, %2]", 0, QApplication::UnicodeUTF8)

                                  .arg(f.family())

                                  .arg(f.pointSize());

}

QtBoolEdit::QtBoolEdit(QWidget *parent) :

    QWidget(parent),

    m_checkBox(new QCheckBox(this)),

    m_textVisible(true)

{

    QHBoxLayout *lt = new QHBoxLayout;

    if (QApplication::layoutDirection() == Qt::LeftToRight)

        lt->setContentsMargins(4, 0, 0, 0);

    else

        lt->setContentsMargins(0, 0, 4, 0);

    lt->addWidget(m_checkBox);

    setLayout(lt);

    connect(m_checkBox, SIGNAL(toggled(bool)), this, SIGNAL(toggled(bool)));

    setFocusProxy(m_checkBox);

    m_checkBox->setText(tr("True"));

}

void QtBoolEdit::setTextVisible(bool textVisible)

{

    if (m_textVisible == textVisible)

        return;

    m_textVisible = textVisible;

    if (m_textVisible)

        m_checkBox->setText(isChecked() ? tr("True") : tr("False"));

    else

        m_checkBox->setText(QString());

}

Qt::CheckState QtBoolEdit::checkState() const

{

    return m_checkBox->checkState();

}

void QtBoolEdit::setCheckState(Qt::CheckState state)

{

    m_checkBox->setCheckState(state);

}

bool QtBoolEdit::isChecked() const

{

    return m_checkBox->isChecked();

}

void QtBoolEdit::setChecked(bool c)

{

    m_checkBox->setChecked(c);

    if (!m_textVisible)

        return;

    m_checkBox->setText(isChecked() ? tr("True") : tr("False"));

}

bool QtBoolEdit::blockCheckBoxSignals(bool block)

{

    return m_checkBox->blockSignals(block);

}

void QtBoolEdit::mousePressEvent(QMouseEvent *event)

{

    if (event->buttons() == Qt::LeftButton) {

        m_checkBox->click();

        event->accept();

    } else {

        QWidget::mousePressEvent(event);

    }

}

QtKeySequenceEdit::QtKeySequenceEdit(QWidget *parent)

    : QWidget(parent), m_num(0), m_lineEdit(new QLineEdit(this))

{

    QHBoxLayout *layout = new QHBoxLayout(this);

    layout->addWidget(m_lineEdit);

    layout->setMargin(0);

    m_lineEdit->installEventFilter(this);

    m_lineEdit->setReadOnly(true);

    m_lineEdit->setFocusProxy(this);

    setFocusPolicy(m_lineEdit->focusPolicy());

    setAttribute(Qt::WA_InputMethodEnabled);

}

bool QtKeySequenceEdit::eventFilter(QObject *o, QEvent *e)

{

    if (o == m_lineEdit && e->type() == QEvent::ContextMenu) {

        QContextMenuEvent *c = static_cast<QContextMenuEvent *>(e);

        QMenu *menu = m_lineEdit->createStandardContextMenu();

        const QList<QAction *> actions = menu->actions();

        QListIterator<QAction *> itAction(actions);

        while (itAction.hasNext()) {

            QAction *action = itAction.next();

            action->setShortcut(QKeySequence());

            QString actionString = action->text();

            const int pos = actionString.lastIndexOf(QLatin1Char('\t'));

            if (pos > 0)

                actionString.remove(pos, actionString.length() - pos);

            action->setText(actionString);

        }

        QAction *actionBefore = 0;

        if (actions.count() > 0)

            actionBefore = actions[0];

        QAction *clearAction = new QAction(tr("Clear Shortcut"), menu);

        menu->insertAction(actionBefore, clearAction);

        menu->insertSeparator(actionBefore);

        clearAction->setEnabled(!m_keySequence.isEmpty());

        connect(clearAction, SIGNAL(triggered()), this, SLOT(slotClearShortcut()));

        menu->exec(c->globalPos());

        delete menu;

        e->accept();

        return true;

    }

    return QWidget::eventFilter(o, e);

}

void QtKeySequenceEdit::slotClearShortcut()

{

    if (m_keySequence.isEmpty())

        return;

    setKeySequence(QKeySequence());

    emit keySequenceChanged(m_keySequence);

}

void QtKeySequenceEdit::handleKeyEvent(QKeyEvent *e)

{

    int nextKey = e->key();

    if (nextKey == Qt::Key_Control || nextKey == Qt::Key_Shift ||

            nextKey == Qt::Key_Meta || nextKey == Qt::Key_Alt ||

            nextKey == Qt::Key_Super_L || nextKey == Qt::Key_AltGr)

        return;

    nextKey |= translateModifiers(e->modifiers(), e->text());

    int k0 = m_keySequence[0];

    int k1 = m_keySequence[1];

    int k2 = m_keySequence[2];

    int k3 = m_keySequence[3];

    switch (m_num) {

        case 0: k0 = nextKey; k1 = 0; k2 = 0; k3 = 0; break;

        case 1: k1 = nextKey; k2 = 0; k3 = 0; break;

        case 2: k2 = nextKey; k3 = 0; break;

        case 3: k3 = nextKey; break;

        default: break;

    }

    ++m_num;

    if (m_num > 3)

        m_num = 0;

    m_keySequence = QKeySequence(k0, k1, k2, k3);

    m_lineEdit->setText(m_keySequence.toString(QKeySequence::NativeText));

    e->accept();

    emit keySequenceChanged(m_keySequence);

}

void QtKeySequenceEdit::setKeySequence(const QKeySequence &sequence)

{

    if (sequence == m_keySequence)

        return;

    m_num = 0;

    m_keySequence = sequence;

    m_lineEdit->setText(m_keySequence.toString(QKeySequence::NativeText));

}

QKeySequence QtKeySequenceEdit::keySequence() const

{

    return m_keySequence;

}

int QtKeySequenceEdit::translateModifiers(Qt::KeyboardModifiers state, const QString &text) const

{

    int result = 0;

    if ((state & Qt::ShiftModifier) && (text.size() == 0 || !text.at(0).isPrint() || text.at(0).isLetter() || text.at(0).isSpace()))

        result |= Qt::SHIFT;

    if (state & Qt::ControlModifier)

        result |= Qt::CTRL;

    if (state & Qt::MetaModifier)

        result |= Qt::META;

    if (state & Qt::AltModifier)

        result |= Qt::ALT;

    return result;

}

void QtKeySequenceEdit::focusInEvent(QFocusEvent *e)

{

    m_lineEdit->event(e);

    m_lineEdit->selectAll();

    QWidget::focusInEvent(e);

}

void QtKeySequenceEdit::focusOutEvent(QFocusEvent *e)

{

    m_num = 0;

    m_lineEdit->event(e);

    QWidget::focusOutEvent(e);

}

void QtKeySequenceEdit::keyPressEvent(QKeyEvent *e)

{

    handleKeyEvent(e);

    e->accept();

}

void QtKeySequenceEdit::keyReleaseEvent(QKeyEvent *e)

{

    m_lineEdit->event(e);

}

bool QtKeySequenceEdit::event(QEvent *e)

{

    if (e->type() == QEvent::Shortcut ||

            e->type() == QEvent::ShortcutOverride  ||

            e->type() == QEvent::KeyRelease) {

        e->accept();

        return true;

    }

    return QWidget::event(e);

}

QT_END_NAMESPACE