workspace/systemsettings/moduleiconitem.cpp

   1 /**
   2  * This file is part of the System Settings package
   3  * Copyright (C) 2005 Benjamin C Meyer
   4 *                    <ben+systempreferences at meyerhome dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  */
  21
  22 #include "moduleiconitem.h"
  23 #include <kiconloader.h>
  24 #include <kdebug.h>
  25 #include <kcmoduleinfo.h>
  26
  27 #include <climits>
  28
  29 #include <QApplication>
  30 #include <QPainter>
  31
  32 #define IMAGE_SIZE 32
  33 #define ICON_WIDTH 100
  34
  35 ModuleIconItemDelegate::ModuleIconItemDelegate(QObject *parent) : QItemDelegate(parent)
  36 {
  37 }
  38
  39 void ModuleIconItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
  40 {
  41         painter->save();
  42         painter->setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
  43
  44         QStyle *style;
  45         bool selected = option.state & QStyle::State_Selected || option.state & QStyle::State_HasFocus;
  46         if (const QStyleOptionViewItemV3 *v3 = qstyleoption_cast<const QStyleOptionViewItemV3 *>(&option)) {
  47                 style = v3->widget->style();
  48                 if (!v3->widget->hasFocus()) selected = false;
  49         } else {
  50                 style = QApplication::style();
  51         }
  52
  53         if (selected) {
  54                 painter->fillPath(roundedRectangle(option.rect, 10), option.palette.brush(QPalette::Highlight));
  55                 painter->setPen(option.palette.color(QPalette::HighlightedText));
  56         }
  57
  58         if (!selected && (option.state & QStyle::State_MouseOver)) {
  59                 QColor hover = option.palette.color(QPalette::Highlight);
  60                 hover.setAlpha(88);
  61                 painter->fillPath(roundedRectangle(option.rect, 10), hover);
  62         }
  63
  64         if( index.data( Qt::UserRole ).toInt() == KIconLoader::DisabledState ) {
  65                 painter->setPen( option.palette.color( QPalette::Disabled, QPalette::Text ) );
  66         }
  67
  68         const QSize &decorationSize = option.decorationSize;
  69         QIcon::Mode iconMode = QIcon::Normal;
  70         if (selected) iconMode = QIcon::Selected;
  71         const QPixmap &pixmap = qvariant_cast<QIcon>(index.data(Qt::DecorationRole)).pixmap(option.decorationSize, iconMode);
  72         int iconX = option.rect.left() + (option.rect.width() - decorationSize.width()) / 2;
  73         painter->drawPixmap(iconX, option.rect.top() + style->pixelMetric(QStyle::PM_FocusFrameVMargin), decorationSize.width(), decorationSize.height(), pixmap);
  74
  75         QRect textRectangle = option.rect;
  76         textRectangle.setTop(textRectangle.top() + decorationSize.height() + style->pixelMetric(QStyle::PM_FocusFrameVMargin));
  77         painter->drawText(textRectangle, Qt::AlignHCenter | Qt::TextWordWrap, index.data(Qt::DisplayRole).toString());
  78         painter->restore();
  79 }
  80
  81 // Method taken from KFileItemDelegate. Check whether it has been moved to
  82 // kdefx/kdrawutil.cpp as the comment says on Fredrik's code. If so, remove
  83 // this code (duplication), and use the library one.
  84 QPainterPath ModuleIconItemDelegate::roundedRectangle(const QRectF &rect, qreal radius) const
  85 {
  86         QPainterPath path(QPointF(rect.left(), rect.top() + radius));
  87         path.quadTo(rect.left(), rect.top(), rect.left() + radius, rect.top());         // Top left corner
  88         path.lineTo(rect.right() - radius, rect.top());                                 // Top side
  89         path.quadTo(rect.right(), rect.top(), rect.right(), rect.top() + radius);       // Top right corner
  90         path.lineTo(rect.right(), rect.bottom() - radius);                              // Right side
  91         path.quadTo(rect.right(), rect.bottom(), rect.right() - radius, rect.bottom()); // Bottom right corner
  92         path.lineTo(rect.left() + radius, rect.bottom());                               // Bottom side
  93         path.quadTo(rect.left(), rect.bottom(), rect.left(), rect.bottom() - radius);   // Bottom left corner
  94         path.closeSubpath();
  95
  96         return path;
  97 }
  98
  99 ModuleIconItem::ModuleIconItem( QListWidget* parent, const KCModuleInfo& module)
 100         : QListWidgetItem(SmallIcon( module.icon(), IMAGE_SIZE ), module.moduleName(), parent),
 101         imageName(module.icon())
 102 {
 103         setData( Qt::UserRole, KIconLoader::DefaultState );
 104         modules.append(module);
 105         setSize();
 106 }
 107
 108 ModuleIconItem::ModuleIconItem( QListWidget* parent, const QString &text,
 109                 const QString &_imageName )
 110         : QListWidgetItem( SmallIcon( _imageName, IMAGE_SIZE ), text, parent ),
 111         imageName(_imageName)
 112 {
 113         setData( Qt::UserRole, KIconLoader::DefaultState );
 114         setSize();
 115 }
 116
 117 void ModuleIconItem::loadIcon( bool enabled )
 118 {
 119         int newState = enabled ? KIconLoader::DefaultState : KIconLoader::DisabledState;
 120         if( newState == data( Qt::UserRole ).toInt() )
 121                 return;
 122
 123         setData( Qt::UserRole, newState );
 124         setIcon( DesktopIcon( imageName, IMAGE_SIZE , newState ) );
 125 }
 126
 127 void ModuleIconItem::setSize()
 128 {
 129         QStyle *style = listWidget()->style();
 130         QFontMetrics fm(font());
 131         const QRect &rect = fm.boundingRect(0, 0, ICON_WIDTH, INT_MAX, Qt::TextWordWrap, text());
 132         setData(Qt::SizeHintRole, QSize(ICON_WIDTH, IMAGE_SIZE + style->pixelMetric(QStyle::PM_FocusFrameVMargin) + rect.height()));
 133 }