workspace/kcontrol/input/xcursor/itemdelegate.cpp

   1 /*
   2  * Copyright © 2006-2007 Fredrik Höglund <fredrik@kde.org>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License version 2 or at your option version 3 as published
   7  * by the Free Software Foundation.
   8  *
   9  * This program 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  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; see the file COPYING.  If not, write to
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include "itemdelegate.h"
  21 #include "cursortheme.h"
  22
  23 #include <QApplication>
  24 #include <QModelIndex>
  25 #include <QPainter>
  26
  27 namespace
  28 {
  29     const int decorationMargin = 8;
  30 }
  31
  32
  33 ItemDelegate::ItemDelegate(QObject *parent)
  34     : QAbstractItemDelegate(parent)
  35 {
  36 }
  37
  38
  39 ItemDelegate::~ItemDelegate()
  40 {
  41 }
  42
  43
  44 QString ItemDelegate::firstLine(const QModelIndex &index) const
  45 {
  46     if (index.isValid())
  47         return index.model()->data(index, Qt::DisplayRole).toString();
  48
  49     return QString();
  50 }
  51
  52
  53 QString ItemDelegate::secondLine(const QModelIndex &index) const
  54 {
  55     if (index.isValid())
  56         return index.model()->data(index, CursorTheme::DisplayDetailRole).toString();
  57
  58         return QString();
  59 }
  60
  61
  62 QPixmap ItemDelegate::decoration(const QModelIndex &index) const
  63 {
  64     if (index.isValid())
  65         return qvariant_cast<QPixmap>(index.model()->data(index, Qt::DecorationRole));
  66
  67     return QPixmap();
  68 }
  69
  70
  71 QSize ItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
  72 {
  73     if (!index.isValid())
  74         return QSize();
  75
  76     QFont normalfont = option.font;
  77     QFont boldfont = normalfont;
  78     boldfont.setBold(true);
  79
  80     // Extract the items we want to measure
  81     QString firstRow   = firstLine(index);
  82     QString secondRow  = secondLine(index);
  83
  84     // Compute the height
  85     QFontMetrics fm1(boldfont);
  86     QFontMetrics fm2(normalfont);
  87     int height = fm1.lineSpacing() + fm2.lineSpacing();
  88     height = qMax(height, option.decorationSize.height());
  89
  90     // Compute the text width
  91     int width = fm1.width(firstRow);
  92     width = qMax(width, fm2.width(secondRow));
  93
  94     // Add decoration width + margin
  95     width += option.decorationSize.width() + decorationMargin;
  96
  97     return QSize(width, height + 16);
  98 }
  99
 100
 101 QPalette::ColorRole ItemDelegate::foregroundRole(const QStyleOptionViewItem &option, const QModelIndex &index) const
 102 {
 103     Q_UNUSED(index)
 104
 105     if (option.state & QStyle::State_Selected)
 106         return QPalette::HighlightedText;
 107
 108     return QPalette::Text;
 109 }
 110
 111
 112 void ItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
 113 {
 114     if (!index.isValid())
 115         return;
 116
 117     painter->save();
 118
 119     QFont normalfont = option.font;
 120     QFont boldfont = normalfont;
 121     boldfont.setBold(true);
 122
 123     QString firstRow  = firstLine(index);
 124     QString secondRow = secondLine(index);
 125     QPixmap pixmap    = decoration(index);
 126
 127     QColor textcol = option.palette.color(foregroundRole(option, index));
 128
 129     // Draw the background
 130     QStyleOptionViewItemV4 opt = option;
 131     QStyle *style = opt.widget ? opt.widget->style() : QApplication::style();
 132     style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, opt.widget);
 133
 134     // Draw the icon
 135     int x = option.rect.left() + (option.decorationSize.width() - pixmap.width() + decorationMargin) / 2;
 136     int y = option.rect.top() + (option.rect.height() - pixmap.height()) / 2;
 137
 138     QRect pixmapRect = QStyle::visualRect(option.direction, option.rect,
 139                                           QRect(x, y, pixmap.width(), pixmap.height()));
 140
 141     painter->drawPixmap(pixmapRect.x(), pixmapRect.y(), pixmap);
 142
 143     // Draw the text
 144     QFontMetrics fm1(boldfont);
 145     QFontMetrics fm2(normalfont);
 146
 147     int textAreaHeight = fm1.lineSpacing() + fm2.lineSpacing();
 148
 149     x = option.rect.left() + option.decorationSize.width() + decorationMargin;
 150     int y1 = option.rect.top() + (option.rect.height() - textAreaHeight) / 2;
 151     int y2 = y1 + fm1.lineSpacing();
 152
 153     QRect firstRowRect = QStyle::visualRect(option.direction, option.rect,
 154                                             QRect(x, y1, fm1.width(firstRow), fm1.lineSpacing()));
 155
 156     QRect secondRowRect = QStyle::visualRect(option.direction, option.rect,
 157                                              QRect(x, y2, fm2.width(secondRow), fm2.lineSpacing()));
 158
 159     painter->setPen(textcol);
 160
 161     // First line
 162     painter->setFont(boldfont);
 163     painter->drawText(firstRowRect, Qt::AlignCenter, firstRow);
 164
 165     // Second line
 166     painter->setFont(normalfont);
 167     painter->drawText(secondRowRect, Qt::AlignCenter, secondRow);
 168
 169     painter->restore();
 170 }
 171