/*
 * Copyright 20010 by Marco Martin <notmart@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

#include "panelapplethandle.h"
#include "toolbutton.h"

#include <QAction>
#include <QApplication>
#include <QBoxLayout>
#include <QLabel>
#include <QPropertyAnimation>
#include <QTimer>

#include <KWindowSystem>

#include <Plasma/Applet>
#include <Plasma/Containment>
#include <Plasma/Corona>
#include <Plasma/Svg>
#include <Plasma/Theme>
#include <Plasma/WindowEffects>

PanelAppletHandle::PanelAppletHandle(QWidget *parent, Qt::WindowFlags f)
    : Plasma::Dialog(parent, f)
{
    m_icons = new Plasma::Svg(this);
    m_icons->setImagePath("widgets/configuration-icons");
    KWindowSystem::setType(winId(), NET::Dock);
    setWindowFlags(Qt::X11BypassWindowManagerHint);
    hide();

    m_hideTimer = new QTimer(this);
    m_hideTimer->setSingleShot(true);
    connect(m_hideTimer, SIGNAL(timeout()), this, SLOT(hide()));

    m_layout = new QBoxLayout(QBoxLayout::LeftToRight, this);
    m_layout->setContentsMargins(0, 0, 0, 0);
    m_configureButton = new ToolButton(this);
    m_configureButton->setIcon(m_icons->pixmap("configure"));
    connect(m_configureButton, SIGNAL(clicked()), this, SLOT(configureApplet()));

    m_layout->addWidget(m_configureButton);
    m_layout->addStretch(10);
    m_title = new QLabel(this);
    m_layout->addWidget(m_title);
    m_layout->addStretch(0);

    m_closeButton = new ToolButton(this);
    m_closeButton->setIcon(m_icons->pixmap("close"));
    m_layout->addWidget(m_closeButton);
    connect(m_closeButton, SIGNAL(clicked()), this, SLOT(closeApplet()));

    m_moveAnimation = new QPropertyAnimation(this, "pos", this);

    m_layout->activate();
    resize(minimumSizeHint());

    connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(updatePalette()));
    updatePalette();
}

PanelAppletHandle::~PanelAppletHandle()
{
}

void PanelAppletHandle::updatePalette()
{
    QPalette p = m_title->palette();
    p.setColor(QPalette::WindowText, Plasma::Theme::defaultTheme()->color(Plasma::Theme::TextColor));
    m_title->setPalette(p);
}

void PanelAppletHandle::setApplet(Plasma::Applet *applet)
{
    if (applet == m_applet.data()) {
        moveToApplet();
        return;
    }
    Plasma::Applet *oldApplet = m_applet.data();
    if (oldApplet) {
        disconnect(oldApplet, SIGNAL(destroyed()), this, SLOT(appletDestroyed()));
    }

    m_applet = applet;
    m_hideTimer->stop();

    if (applet) {
        m_title->setText(applet->name());
        m_layout->activate();
        resize(minimumSizeHint());

        if (QApplication::layoutDirection() == Qt::RightToLeft) {
            m_layout->setDirection(QBoxLayout::RightToLeft);
        } else {
            m_layout->setDirection(QBoxLayout::LeftToRight);
        }

        QAction *configAction = applet->action("configure");
        m_configureButton->setVisible(configAction && configAction->isEnabled());

        connect(applet, SIGNAL(destroyed()), this, SLOT(appletDestroyed()));

        moveToApplet();
    }
}

void PanelAppletHandle::moveToApplet()
{
    Plasma::Applet *applet = m_applet.data();
    if (!applet) {
        return;
    }
    Plasma::Containment *containment = applet->containment();
    if (!containment || !containment->corona()) {
        return;
    }

    if (isVisible()) {
        m_moveAnimation->setStartValue(pos());
        m_moveAnimation->setEndValue(containment->corona()->popupPosition(applet, size(), Qt::AlignCenter));
        m_moveAnimation->setDuration(250);
        m_moveAnimation->start();
    } else {
        move(applet->containment()->corona()->popupPosition(applet, size(), Qt::AlignCenter));
        Plasma::WindowEffects::slideWindow(this, applet->location());
        show();
    }
}

void PanelAppletHandle::startHideTimeout()
{
    m_hideTimer->start(800);
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        Plasma::WindowEffects::slideWindow(this, applet->location());
    }
}

void PanelAppletHandle::configureApplet()
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        applet->showConfigurationInterface();
    }
}

void PanelAppletHandle::closeApplet()
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        applet->destroy();
    }
}

void PanelAppletHandle::appletDestroyed()
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        disconnect(applet, SIGNAL(destroyed()), this, SLOT(appletDestroyed()));
        m_applet.clear();
    }
    hide();
}

void PanelAppletHandle::enterEvent(QEvent *event)
{
    Q_UNUSED(event)

    m_hideTimer->stop();
}

void PanelAppletHandle::leaveEvent(QEvent *event)
{
    Q_UNUSED(event)

    m_hideTimer->start(800);
}

void PanelAppletHandle::mousePressEvent(QMouseEvent *event)
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        emit mousePressed(applet, event);
    }
}

void PanelAppletHandle::mouseMoveEvent(QMouseEvent *event)
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        emit mouseMoved(applet, event);
    }
}

void PanelAppletHandle::mouseReleaseEvent(QMouseEvent *event)
{
    Plasma::Applet *applet = m_applet.data();
    if (applet) {
        emit mouseReleased(applet, event);
    }
}


#include "moc_panelapplethandle.cpp"