/**************************************************************************
**
** 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
**
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** 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.
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#include "treewidgetcolumnstretcher.h"
#include <QtGui/QTreeWidget>
#include <QtGui/QHideEvent>
#include <QtGui/QHeaderView>
using namespace Utils;

TreeWidgetColumnStretcher::TreeWidgetColumnStretcher(QTreeWidget *treeWidget, int columnToStretch)
        : QObject(treeWidget->header()), m_columnToStretch(columnToStretch)
{
    parent()->installEventFilter(this);
    QHideEvent fake;
    TreeWidgetColumnStretcher::eventFilter(parent(), &fake);
}

bool TreeWidgetColumnStretcher::eventFilter(QObject *obj, QEvent *ev)
{
    if (obj == parent()) {
        if (ev->type() == QEvent::Show) {
            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
            for (int i = 0; i < hv->count(); ++i)
                hv->setResizeMode(i, QHeaderView::Interactive);
        } else if (ev->type() == QEvent::Hide) {
            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
            for (int i = 0; i < hv->count(); ++i)
                hv->setResizeMode(i, i == m_columnToStretch ? QHeaderView::Stretch : QHeaderView::ResizeToContents);
        } else if (ev->type() == QEvent::Resize) {
            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
            if (hv->resizeMode(m_columnToStretch) == QHeaderView::Interactive) {
                QResizeEvent *re = static_cast<QResizeEvent*>(ev);
                int diff = re->size().width() - re->oldSize().width() ;
                hv->resizeSection(m_columnToStretch, qMax(32, hv->sectionSize(1) + diff));
            }
        }
    }
    return false;
}