/** -*- c++ -*-
 * overlaywidget.h
 *
 *  Copyright (c) 2004 David Faure <faure@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; version 2 of the License
 *
 *  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.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of this program with any edition of
 *  the Qt library by Trolltech AS, Norway (or with modified versions
 *  of Qt that use the same license as Qt), and distribute linked
 *  combinations including the two.  You must obey the GNU General
 *  Public License in all respects for all of the code used other than
 *  Qt.  If you modify this file, you may extend this exception to
 *  your version of the file, but you are not obligated to do so.  If
 *  you do not wish to do so, delete this exception statement from
 *  your version.
 */

#include "overlaywidget.h"

#include <QHBoxLayout>
#include <QResizeEvent>
#include <QEvent>
#include <QApplication>

using namespace KDevelop;

OverlayWidget::OverlayWidget( QWidget* alignWidget, QWidget* parent, const char* name )
    : QWidget( parent, Qt::Window | Qt::FramelessWindowHint ), mAlignWidget( 0 )
{
    auto hboxHBoxLayout = new QHBoxLayout(this);
    hboxHBoxLayout->setMargin(0);

    setObjectName(name);
    setAlignWidget( alignWidget );

    setWindowFlags(Qt::WindowDoesNotAcceptFocus | windowFlags());

    qApp->installEventFilter(this);
}

OverlayWidget::~OverlayWidget()
{
}

void OverlayWidget::reposition()
{
    if ( !mAlignWidget )
        return;
    // p is in the alignWidget's coordinates
    QPoint p;
    // We are always above the alignWidget, right-aligned with it.
    p.setX( mAlignWidget->width() - width() );
    p.setY( -height() );
    // Position in the global coordinates
    QPoint global = mAlignWidget->mapToGlobal( p );
    // Move 'this' to that position.
    move( global );
}

void OverlayWidget::setAlignWidget( QWidget * w )
{
    if (w == mAlignWidget)
        return;

    mAlignWidget = w;

    reposition();
}

bool OverlayWidget::eventFilter( QObject* o, QEvent* e)
{
    if (e->type() == QEvent::Move || e->type() == QEvent::Resize) {
        reposition();
    } else if (e->type() == QEvent::Close) {
        close();
    }

    return QWidget::eventFilter(o,e);
}

void OverlayWidget::resizeEvent( QResizeEvent* ev )
{
    reposition();
    QWidget::resizeEvent( ev );
}

