/********************Q******************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/

#include "fancyactionbar.h"
#include "coreconstants.h"

#include <utils/stylehelper.h>

#include <coreplugin/icore.h>
#include <coreplugin/mainwindow.h>

#include <QtGui/QHBoxLayout>
#include <QtGui/QPainter>
#include <QtGui/QPicture>
#include <QtGui/QVBoxLayout>
#include <QtGui/QAction>
#include <QtGui/QStatusBar>
#include <QtGui/QStyle>
#include <QtGui/QStyleOption>
#include <QtCore/QEvent>
#include <QtGui/QMouseEvent>
#include <QtCore/QAnimationGroup>
#include <QtCore/QPropertyAnimation>

using namespace Core;
using namespace Internal;

FancyToolButton::FancyToolButton(QWidget *parent)
    : QToolButton(parent), m_fader(0)
{
    setAttribute(Qt::WA_Hover, true);
    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
}

void FancySeparator::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);
    QPainter painter(this);
    painter.fillRect(rect(), Qt::red);
}

bool FancyToolButton::event(QEvent *e)
{
    switch(e->type()) {
    case QEvent::Enter:
        {
            QPropertyAnimation *animation = new QPropertyAnimation(this, "fader");
            animation->setDuration(125);
            animation->setEndValue(1.0);
            animation->start(QAbstractAnimation::DeleteWhenStopped);
        }
        break;
    case QEvent::Leave:
        {
            QPropertyAnimation *animation = new QPropertyAnimation(this, "fader");
            animation->setDuration(125);
            animation->setEndValue(0.0);
            animation->start(QAbstractAnimation::DeleteWhenStopped);
        }
        break;
    default:
        return QToolButton::event(e);
    }
    return false;
}

void FancyToolButton::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event)
    QPainter painter(this);

    // draw borders
    bool isTitledAction = defaultAction()->property("titledAction").toBool();

#ifndef Q_WS_MAC // Mac UIs usually don't hover
    if (m_fader > 0 && isEnabled() && !isDown()) {
        painter.save();
        QColor whiteOverlay(Qt::white);
        whiteOverlay.setAlpha(int(10 * m_fader));
        QRect roundRect = rect().adjusted(5, 3, -5, -3);
        painter.translate(0.5, 0.5);
        painter.setRenderHint(QPainter::Antialiasing);
        painter.setBrush(whiteOverlay);
        whiteOverlay.setAlpha(int(20*m_fader));
        painter.setPen(whiteOverlay);
        painter.drawRoundedRect(roundRect, 3, 3);
        painter.restore();
    }
#endif

    if (isDown() || isChecked()) {
        painter.save();
        QColor color(Qt::black);
        color.setAlpha(15);
        QRect roundRect = rect().adjusted(5, 3, -5, -3);
        painter.translate(0.5, 0.5);
        painter.setRenderHint(QPainter::Antialiasing);
        painter.setPen(QColor(255, 255, 255, 20));
        static int rounding = 3;
        painter.drawRoundedRect(roundRect.adjusted(-1, -1, 1, 1), rounding, rounding);
        painter.setPen(QColor(0, 0, 0, 20));
        painter.setBrush(QColor(0, 0, 0, 15));
        painter.drawRoundedRect(roundRect.adjusted(1, 1, 0, 0), rounding, rounding);
        color.setAlpha(75);
        painter.setPen(color);
        painter.setBrush(Qt::NoBrush);
        painter.drawRoundedRect(roundRect, 3, 3);
        painter.restore();
    }

    QPixmap borderPixmap;
    QMargins margins;

    QPixmap pix = icon().pixmap(Core::Constants::TARGET_ICON_SIZE, Core::Constants::TARGET_ICON_SIZE, isEnabled() ? QIcon::Normal : QIcon::Disabled);
    QPoint center = rect().center();
    QSizeF halfPixSize = pix.size()/2.0;

    painter.drawPixmap(center-QPointF(halfPixSize.width()-1, halfPixSize.height()-1), pix);

    // draw popup texts
    if (isTitledAction) {
        QFont normalFont(painter.font());
        normalFont.setPointSizeF(Utils::StyleHelper::sidebarFontSize());
        QFont boldFont(normalFont);
        boldFont.setBold(true);
        QFontMetrics fm(normalFont);
        QFontMetrics boldFm(boldFont);
        int lineHeight = boldFm.height();

        int textFlags = Qt::AlignVCenter|Qt::AlignHCenter;

        painter.setFont(normalFont);

        QPoint textOffset = center - QPoint(pix.rect().width()/2, pix.rect().height()/2);
        textOffset = textOffset - QPoint(0, lineHeight+5);
        QRectF r(0, textOffset.y(), rect().width(), lineHeight);
        QColor penColor;
        if (isEnabled())
            penColor = Qt::white;
        else
            penColor = Qt::gray;
        painter.setPen(penColor);
        const QString projectName = defaultAction()->property("heading").toString();
        QString ellidedProjectName = fm.elidedText(projectName, Qt::ElideMiddle, r.width());
        if (isEnabled()) {
            const QRectF shadowR = r.translated(0, 1);
            painter.setPen(QColor(30, 30, 30, 80));
            painter.drawText(shadowR, textFlags, ellidedProjectName);
            painter.setPen(penColor);
        }
        painter.drawText(r, textFlags, ellidedProjectName);
        textOffset = center + QPoint(pix.rect().width()/2, pix.rect().height()/2);
        r = QRectF(0, textOffset.y()+5, rect().width(), lineHeight);
        const QString buildConfiguration = defaultAction()->property("subtitle").toString();
        painter.setFont(boldFont);
        QString ellidedBuildConfiguration = boldFm.elidedText(buildConfiguration, Qt::ElideMiddle, r.width());
        if (isEnabled()) {
            const QRectF shadowR = r.translated(0, 1);
            painter.setPen(QColor(30, 30, 30, 80));
            painter.drawText(shadowR, textFlags, ellidedBuildConfiguration);
            painter.setPen(penColor);
        }
        painter.drawText(r, textFlags, ellidedBuildConfiguration);
        QStyleOption opt;
        opt.initFrom(this);
        opt.rect = rect().adjusted(rect().width() - 18, 0, -10, 0);
        Utils::StyleHelper::drawArrow(QStyle::PE_IndicatorArrowRight, &painter, &opt);
    }
}

void FancyActionBar::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    Q_UNUSED(event)
    QColor light = QColor(255, 255, 255, 40);
    QColor dark = QColor(0, 0, 0, 60);
    painter.setPen(dark);
    painter.drawLine(rect().topLeft(), rect().topRight());
    painter.setPen(light);
    painter.drawLine(rect().topLeft() + QPoint(0,1), rect().topRight() + QPoint(0,1));
}

QSize FancyToolButton::sizeHint() const
{
    QSizeF buttonSize = iconSize().expandedTo(QSize(64, 36));
    if (defaultAction()->property("titledAction").toBool()) {
        QFont boldFont(font());
        boldFont.setPointSizeF(Utils::StyleHelper::sidebarFontSize());
        boldFont.setBold(true);
        QFontMetrics fm(boldFont);
        qreal lineHeight = fm.height();
        buttonSize += QSizeF(0, (lineHeight*3.5));
    }
    return buttonSize.toSize();
}

QSize FancyToolButton::minimumSizeHint() const
{
    return QSize(8, 8);
}

void FancyToolButton::actionChanged()
{
    // the default action changed in some way, e.g. it might got hidden
    // since we inherit a tool button we won't get invisible, so do this here
    if (QAction* action = defaultAction())
        setVisible(action->isVisible());
}

FancyActionBar::FancyActionBar(QWidget *parent)
    : QWidget(parent)
{
    m_actionsLayout = new QVBoxLayout;
    QVBoxLayout *spacerLayout = new QVBoxLayout;
    spacerLayout->addLayout(m_actionsLayout);
    int sbh = ICore::instance()->statusBar()->height();
    spacerLayout->addSpacing(sbh);
    spacerLayout->setMargin(0);
    spacerLayout->setSpacing(0);
    setLayout(spacerLayout);
    setContentsMargins(0,2,0,0);
}

void FancyActionBar::addProjectSelector(QAction *action)
{
    FancyToolButton* toolButton = new FancyToolButton(this);
    toolButton->setDefaultAction(action);
    connect(action, SIGNAL(changed()), toolButton, SLOT(actionChanged()));
    m_actionsLayout->insertWidget(0, toolButton);

}
void FancyActionBar::insertAction(int index, QAction *action)
{
    FancyToolButton *toolButton = new FancyToolButton(this);
    toolButton->setDefaultAction(action);
    connect(action, SIGNAL(changed()), toolButton, SLOT(actionChanged()));
    m_actionsLayout->insertWidget(index, toolButton);
}

QLayout *FancyActionBar::actionsLayout() const
{
    return m_actionsLayout;
}