/*
 *   Copyright (c) 2009 Chani Armitage <chani@kde.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2, 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 Library 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 "mouseinputbutton.h"

#include <KDebug>

#include <QApplication>
#include <QtGui/qevent.h>

#include <plasma/containmentactions.h>

MouseInputButton::MouseInputButton(QWidget *parent)
    :QPushButton(parent)
{
    setCheckable(true);
    setDefaultText(i18n("Set Trigger..."), i18n("Click to change how an action is triggered"));
    connect(this, SIGNAL(clicked()), SLOT(getTrigger()));

    //translations
    //FIXME 'left' may be wrong if mousebuttons are swapped?
    m_prettyStrings.insert("LeftButton", i18n("Left-Button"));
    m_prettyStrings.insert("RightButton", i18n("Right-Button"));
    m_prettyStrings.insert("MidButton", i18n("Middle-Button"));
    m_prettyStrings.insert("wheel:Vertical", i18n("Vertical-Scroll"));
    m_prettyStrings.insert("wheel:Horizontal", i18n("Horizontal-Scroll"));

    //FIXME I bet these are wrong for Macs
    m_prettyStrings.insert("ShiftModifier", i18n("Shift"));
    m_prettyStrings.insert("ControlModifier", i18n("Ctrl"));
    m_prettyStrings.insert("AltModifier", i18n("Alt"));
    m_prettyStrings.insert("MetaModifier", i18n("Meta"));
    //FIXME keypad/groupswitch?
}

void MouseInputButton::setDefaultText(const QString &text, const QString &tip)
{
    m_defaultText = text;
    m_defaultToolTip = tip;
    if (!isChecked()) {
        setText(text);
        setToolTip(tip);
    }
}

QString MouseInputButton::trigger()
{
    return m_trigger;
}

void MouseInputButton::getTrigger()
{
    setText(i18n("Input here..."));
    QString tip = i18n("Hold down the modifier keys you want, then click a mouse button or scroll a mouse wheel here");
    setToolTip(tip);
}

void MouseInputButton::reset()
{
    setTrigger(QString());
}

bool MouseInputButton::event(QEvent *event)
{
    if (isChecked()) {
        //got a trigger or cancel
        //I'm intentionally not using break here
        switch (event->type()) {
            case QEvent::Wheel:
                //kDebug() << "wheel@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@";
            case QEvent::MouseButtonRelease:
                changeTrigger(Plasma::ContainmentActions::eventToString(event));
            case QEvent::MouseButtonPress:
                event->accept();
                return true;
            case QEvent::KeyPress:
                if ((static_cast<QKeyEvent*>(event))->key() == Qt::Key_Escape) {
                    //cancel
                    setTrigger(m_trigger);
                    event->accept();
                    return true;
                }
            case QEvent::KeyRelease:
                showModifiers((static_cast<QKeyEvent*>(event))->modifiers());
                break;
            default:
                break;
        }
    }
    bool ret = QPushButton::event(event);
    if (event->type() == QEvent::MouseButtonRelease) {
        //fake a tooltip event
        //because otherwise they go away when you click and don't come back until you move the mouse
        QMouseEvent *e = static_cast<QMouseEvent*>(event);
        QHelpEvent tip(QEvent::ToolTip, e->pos(), e->globalPos());
        QApplication::sendEvent(this, &tip);
    }
    return ret;
}

void MouseInputButton::changeTrigger(const QString &newTrigger)
{
    QString oldTrigger = m_trigger;
    setTrigger(newTrigger);

    emit triggerChanged(oldTrigger, newTrigger);
}

void MouseInputButton::setTrigger(const QString &trigger)
{
    m_trigger=trigger;
    setChecked(false);

    setToolTip(m_defaultToolTip);
    if (trigger.isEmpty()) {
        setText(m_defaultText);
    } else {
        //make it prettier and translatable
        QString button = trigger.section(';', 0, 0);
        QStringList modifiers = trigger.section(';', 1, 1).split('|');

        QString pretty;
        foreach (const QString &mod, modifiers) {
            if (mod == "NoModifier") {
                break;
            }
            pretty += m_prettyStrings.value(mod) + '+';
        }
        pretty += m_prettyStrings.value(button);

        setText(pretty);
    }
}

void MouseInputButton::showModifiers(Qt::KeyboardModifiers modifiers)
{
    QString pretty;
    if (modifiers == Qt::NoModifier) {
        pretty = i18n("Input here...");
    } else {
        if (modifiers & Qt::ShiftModifier) {
            pretty = m_prettyStrings.value("ShiftModifier") + '+';
        }
        if (modifiers & Qt::ControlModifier) {
            pretty += m_prettyStrings.value("ControlModifier") + '+';
        }
        if (modifiers & Qt::AltModifier) {
            pretty += m_prettyStrings.value("AltModifier") + '+';
        }
        if (modifiers & Qt::MetaModifier) {
            pretty += m_prettyStrings.value("MetaModifier") + '+';
        }
        pretty += "...";
    }

    setText(pretty);
}

// vim: sw=4 sts=4 et tw=100