/***************************************************************************
 *   Copyright 2013 Sebastian Kügler <sebas@kde.org>                       *
 *                                                                         *
 *   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 2 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
 ***************************************************************************/

#include "tooltipdialog.h"

#include <QQmlEngine>
#include <QQuickItem>
#include <QDebug>
#include <QPlatformSurfaceEvent>

#include <kdeclarative/qmlobjectsharedengine.h>
#include <KWindowSystem>

ToolTipDialog::ToolTipDialog(QQuickItem  *parent)
    : Dialog(parent),
      m_qmlObject(0),
      m_hideTimeout(4000),
      m_interactive(false),
      m_owner(nullptr)
{
    setLocation(Plasma::Types::Floating);
    setType(Dialog::WindowType::Tooltip);

    m_showTimer = new QTimer(this);
    m_showTimer->setSingleShot(true);
    connect(m_showTimer, &QTimer::timeout, [ = ]() {
        setVisible(false);
    });
}

ToolTipDialog::~ToolTipDialog()
{
}

QQuickItem *ToolTipDialog::loadDefaultItem()
{
    if (!m_qmlObject) {
        m_qmlObject = new KDeclarative::QmlObjectSharedEngine(this);
    }

    if (!m_qmlObject->rootObject()) {
        //HACK: search our own import
        foreach (const QString &path, m_qmlObject->engine()->importPathList()) {
            if (QFile::exists(path + QStringLiteral("/org/kde/plasma/core"))) {
                m_qmlObject->setSource(QUrl::fromLocalFile(path + QStringLiteral("/org/kde/plasma/core/private/DefaultToolTip.qml")));
                break;
            }
        }
    }

    return qobject_cast<QQuickItem *>(m_qmlObject->rootObject());
}

void ToolTipDialog::showEvent(QShowEvent *event)
{
    m_showTimer->start(m_hideTimeout);

    Dialog::showEvent(event);
}

void ToolTipDialog::hideEvent(QHideEvent *event)
{
    m_showTimer->stop();

    Dialog::hideEvent(event);
}

void ToolTipDialog::resizeEvent(QResizeEvent *re)
{
    Dialog::resizeEvent(re);
}

bool ToolTipDialog::event(QEvent *e)
{
    if (e->type() == QEvent::Enter) {
        if (m_interactive) {
            m_showTimer->stop();
        }
    } else if (e->type() == QEvent::Leave) {
        dismiss();
    }

    bool ret = Dialog::event(e);
    Qt::WindowFlags flags = Qt::ToolTip | Qt::WindowDoesNotAcceptFocus | Qt::WindowStaysOnTopHint;
    if (KWindowSystem::isPlatformX11()) {
        flags = flags | Qt::BypassWindowManagerHint;
    }
    setFlags(flags);
    return ret;
}

QObject *ToolTipDialog::owner() const
{
    return m_owner;
}

void ToolTipDialog::setOwner(QObject *owner)
{
    m_owner = owner;
}

void ToolTipDialog::dismiss()
{
    m_showTimer->start(m_hideTimeout / 20); // pretty short: 200ms
}

void ToolTipDialog::keepalive()
{
    m_showTimer->start(m_hideTimeout);
}

bool ToolTipDialog::interactive()
{
    return m_interactive;
}

void ToolTipDialog::setInteractive(bool interactive)
{
    m_interactive = interactive;
    setOutputOnly(!interactive);
}

void ToolTipDialog::valueChanged(const QVariant &value)
{
    setPosition(value.toPoint());
}

#include "moc_tooltipdialog.cpp"
