helper.h 2.49 KB
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/*
  Copyright (C) 2005 Reinhold Kainhofer <reinhold@kainhofer.com>

  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.

  As a special exception, permission is given to link this program
  with any edition of Qt, and distribute the resulting executable,
  without including the source code for Qt in the source distribution.
*/
#ifndef EVENTVIEWS_HELPER_H
#define EVENTVIEWS_HELPER_H

#include <QColor>
#include <QSharedPointer>

namespace Akonadi
{
class Collection;
class Item;
}

class QPixmap;
class QDate;

// Provides static methods that are useful to all views.

namespace EventViews
{

class Prefs;
typedef QSharedPointer<Prefs> PrefsPtr;

/**
 Returns a nice QColor for text, give the input color &c.
*/
QColor getTextColor(const QColor &c);

/**
  This method returns the proper resource / subresource color for the view.
  @return The resource color for the incidence. If the incidence belongs
  to a subresource, the color for the subresource is returned (if set).
  @param calendar the calendar for which the resource color should be obtained
  @param incidence the incidence for which the color is needed (to
                   determine which  subresource needs to be used)
*/
QColor resourceColor(const Akonadi::Item &incidence,
                     const PrefsPtr &preferences);

QColor resourceColor(const Akonadi::Collection &collection,
                     const PrefsPtr &preferences);

/**
  Returns the number of years between the @p start QDate and the @p end QDate
  (i.e. the difference in the year number of both dates)
*/
int yearDiff(const QDate &start, const QDate &end);

/**
   Equivalent to SmallIcon( name ), but uses QPixmapCache.
   KIconLoader already uses a cache, but it's 20x slower on my tests.

   @return A new pixmap if it isn't yet in cache, otherwise returns the
           cached one.
*/
QPixmap cachedSmallIcon(const QString &name);

}

#endif