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 // Local
  27 #include "core/models.h"
  28
  29 namespace Kickoff
  30 {
  31
  32 /**
  33  * Item delegate for rendering items in the Kickoff launcher's views.
  34  *
  35  * The delegate makes use of the various additional Kickoff item data roles
  36  * to draw the item.  For example, if the DiskFreeSpaceRole and DiskUsedSpaceRole item
  37  * data is valid then a bar chart showing the amount of free space available on the disk
  38  * will be drawn.
  39  */
  40 class ItemDelegate : public QAbstractItemDelegate , public ItemStateProvider
  41 {
  42 public:
  43     ItemDelegate();
  44     virtual void paint(QPainter *painter,const QStyleOptionViewItem& option,const QModelIndex& index) const;
  45     virtual QSize sizeHint(const QStyleOptionViewItem& option , const QModelIndex& index) const;
  46
  47     // reimplemented from ItemStateProvider
  48     virtual bool isVisible(const QModelIndex& index) const;
  49
  50     // margin is equivalent to ItemDelegate::BACK_ARROW_WIDTH + ItemDelegate::BACK_ARROW_SPACING
  51     static const int HEADER_LEFT_MARGIN = 5;
  52     static const int HEADER_TOP_MARGIN = 15;
  53     static const int HEADER_BOTTOM_MARGIN = 4;
  54     static const int HEADER_HEIGHT = 35;
  55     static const int FIRST_HEADER_HEIGHT = 20;
  56
  57     static const int ICON_TEXT_MARGIN = 10;
  58     static const int ICON_SIZE = 32;
  59
  60     static const int ITEM_LEFT_MARGIN = 25;
  61     static const int ITEM_RIGHT_MARGIN = 7;
  62     static const int ITEM_HEIGHT = 32 + 4 /* give some space between icons */;
  63     static const int TOP_OFFSET = 5;
  64
  65     static const int BACK_ARROW_WIDTH = 20;
  66     static const int BACK_ARROW_SPACING = 5;
  67
  68 private:
  69     QPainterPath roundedRectangle(const QRectF& rect,qreal radius) const;
  70     QFont fontForSubTitle(const QFont& titleFont) const;
  71 };
  72
  73 }
  74
  75 #endif // ITEMDELEGATE_H