workspace/plasma/applets/kickoff/ui/itemdelegate.h

   1 /*
   2     Copyright 2007 Robert Knight <robertknight@gmail.com>
   3
   4     This library is free software; you can redistribute it and/or
   5     modify it under the terms of the GNU Library General Public
   6     License as published by the Free Software Foundation; either
   7     version 2 of the License, or (at your option) any later version.
   8
   9     This library is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12     Library General Public License for more details.
  13
  14     You should have received a copy of the GNU Library General Public License
  15     along with this library; see the file COPYING.LIB.  If not, write to
  16     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17     Boston, MA 02110-1301, USA.
  18 */
  19
  20 #ifndef ITEMDELEGATE_H
  21 #define ITEMDELEGATE_H
  22
  23 // Qt
  24 #include <QtGui/QAbstractItemDelegate>
  25
  26 //Plasma
  27 #include <Plasma/Delegate>
  28
  29 // Local
  30 #include "core/models.h"
  31
  32 namespace Kickoff
  33 {
  34
  35 /**
  36  * Item delegate for rendering items in the Kickoff launcher's views.
  37  *
  38  * The delegate makes use of the various additional Kickoff item data roles
  39  * to draw the item.  For example, if the DiskFreeSpaceRole and DiskUsedSpaceRole item
  40  * data is valid then a bar chart showing the amount of free space available on the disk
  41  * will be drawn.
  42  */
  43 class ItemDelegate : public Plasma::Delegate , public ItemStateProvider
  44 {
  45 public:
  46     ItemDelegate(QObject *parent = 0);
  47     virtual void paint(QPainter *painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;
  48
  49     // reimplemented from ItemStateProvider
  50     virtual bool isVisible(const QModelIndex& index) const;
  51
  52     // margin is equivalent to ItemDelegate::BACK_ARROW_WIDTH + ItemDelegate::BACK_ARROW_SPACING
  53     static const int HEADER_LEFT_MARGIN = 5;
  54     static const int HEADER_TOP_MARGIN = 15;
  55     static const int HEADER_BOTTOM_MARGIN = 4;
  56     static const int HEADER_HEIGHT = 35;
  57     static const int FIRST_HEADER_HEIGHT = 20;
  58
  59     static const int ITEM_LEFT_MARGIN = 25;
  60     static const int ITEM_RIGHT_MARGIN = 7;
  61     static const int TOP_OFFSET = 5;
  62
  63     static const int BACK_ARROW_WIDTH = 20;
  64     static const int BACK_ARROW_SPACING = 5;
  65 };
  66
  67 }
  68
  69 #endif // ITEMDELEGATE_H