/*
 *  alarmlistdelegate.cpp  -  handles editing and display of alarm list
 *  Program:  kalarm
 *  Copyright © 2007-2009 by David Jarvie <djarvie@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; either version 2 of the License, 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 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 "kalarm.h"
#include "alarmlistdelegate.moc"

#include "kcalendar.h"
#include "alarmlistview.h"
#include "alarmresources.h"
#include "eventlistmodel.h"
#include "functions.h"

#include <kcolorscheme.h>
#include <kdebug.h>

#include <QAbstractProxyModel>
#include <QMouseEvent>
#include <QApplication>


void AlarmListDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	QStyleOptionViewItem opt = option;
	if (index.isValid())
	{
		if (opt.state & QStyle::State_Selected
		&&  !index.data(EventListModel::EnabledRole).toBool())
		{
			// Make the text colour for selected disabled alarms
			// distinguishable from enabled alarms.
			KColorScheme::adjustForeground(opt.palette, KColorScheme::InactiveText, QPalette::HighlightedText, KColorScheme::Selection);
		}
		switch (index.column())
		{
			case EventListModel::TimeColumn:
			{
				QString str = index.data(Qt::DisplayRole).toString();
				// Need to pad out spacing to align times without leading zeroes
				int i = str.indexOf(" ~");    // look for indicator that leading zeroes are omitted
				if (i >= 0)
				{
					QVariant value;
					value = index.data(Qt::ForegroundRole);
					if (value.isValid())
						opt.palette.setColor(QPalette::Text, value.value<QColor>());
					int digitWidth = opt.fontMetrics.width("0");
					QString date = str.left(i + 1);
					int w = opt.fontMetrics.width(date) + digitWidth;
					drawDisplay(painter, opt, opt.rect, date);
					QRect rect(opt.rect);
					rect.setLeft(rect.left() + w);
					drawDisplay(painter, opt, rect, str.mid(i + 2));
					return;
				}
				break;
			}
			case EventListModel::ColourColumn:
			{
				const KAEvent* event = static_cast<const EventListFilterModel*>(index.model())->event(index);
				if (event  &&  event->commandError() != KAEvent::CMD_NO_ERROR)
				{
					opt.font.setBold(true);
					opt.font.setStyleHint(QFont::Serif);
					opt.font.setPixelSize(opt.rect.height() - 2);
				}
				break;
			}
			default:
				break;
		}
	}
	QItemDelegate::paint(painter, opt, index);
}

QSize AlarmListDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
	if (index.isValid())
	{
		switch (index.column())
		{
			case EventListModel::TimeColumn:
			{
				int h = option.fontMetrics.lineSpacing();
				const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
				int w = 2 * textMargin;
				QString str = index.data(Qt::DisplayRole).toString();
				// Need to pad out spacing to align times without leading zeroes
				int i = str.indexOf(" ~");    // look for indicator that leading zeroes are omitted
				if (i >= 0)
				{
					int digitWidth = option.fontMetrics.width("0");
					QString date = str.left(i + 1);
					w += option.fontMetrics.width(date) + digitWidth + option.fontMetrics.width(str.mid(i + 2));;
				}
				else
					w += option.fontMetrics.width(str);
				return QSize(w, h);
			}
			case EventListModel::ColourColumn:
			{
				int h = option.fontMetrics.lineSpacing();
				return QSize(h * 3 / 4, h);
			}
		}
	}
	return QItemDelegate::sizeHint(option, index);
}

void AlarmListDelegate::edit(KAEvent* event, EventListView* view)
{
	KAlarm::editAlarm(event, static_cast<AlarmListView*>(view));   // edit alarm (view-only mode if archived or read-only)
}	
