src/views/tooltips/filemetadatatooltip.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Peter Penz <peter.penz@gmx.at>                  *
   3  *   Copyright (C) 2008 by Fredrik Höglund <fredrik@kde.org>               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "filemetadatatooltip.h"
  22
  23 #include <KColorScheme>
  24 #include <kfilemetadatawidget.h>
  25 #include <KSeparator>
  26 #include <KWindowSystem>
  27
  28 #include <QLabel>
  29 #include <QPainter>
  30 #include <QVBoxLayout>
  31
  32 FileMetaDataToolTip::FileMetaDataToolTip(QWidget* parent) :
  33     QWidget(parent),
  34     m_preview(0),
  35     m_name(0),
  36     m_fileMetaDataWidget(0)
  37 {
  38     setAttribute(Qt::WA_TranslucentBackground);
  39     setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
  40
  41     // Create widget for file preview
  42     m_preview = new QLabel(this);
  43
  44     // Create widget for file name
  45     m_name = new QLabel(this);
  46     QFont font = m_name->font();
  47     font.setBold(true);
  48     m_name->setFont(font);
  49
  50     // Create widget for the meta data
  51     m_fileMetaDataWidget = new KFileMetaDataWidget();
  52     m_fileMetaDataWidget->setForegroundRole(QPalette::ToolTipText);
  53     m_fileMetaDataWidget->setReadOnly(true);
  54     connect(m_fileMetaDataWidget, SIGNAL(metaDataRequestFinished()),
  55             this, SIGNAL(metaDataRequestFinished()));
  56
  57     QVBoxLayout* textLayout = new QVBoxLayout();
  58     textLayout->setAlignment(Qt::AlignTop);
  59     textLayout->addWidget(m_name);
  60     textLayout->addWidget(new KSeparator());
  61     textLayout->addWidget(m_fileMetaDataWidget);
  62     textLayout->setAlignment(m_name, Qt::AlignCenter);
  63     textLayout->setAlignment(m_fileMetaDataWidget, Qt::AlignLeft);
  64
  65     QHBoxLayout* tipLayout = new QHBoxLayout(this);
  66     tipLayout->addWidget(m_preview);
  67     tipLayout->addLayout(textLayout);
  68 }
  69
  70 FileMetaDataToolTip::~FileMetaDataToolTip()
  71 {
  72 }
  73
  74 void FileMetaDataToolTip::setPreview(const QPixmap& pixmap)
  75 {
  76     m_preview->setPixmap(pixmap);
  77 }
  78
  79 QPixmap FileMetaDataToolTip::preview() const
  80 {
  81     if (m_preview->pixmap() != 0) {
  82         return *m_preview->pixmap();
  83     }
  84     return QPixmap();
  85 }
  86
  87 void FileMetaDataToolTip::setName(const QString& name)
  88 {
  89     m_name->setText(name);
  90 }
  91
  92 QString FileMetaDataToolTip::name() const
  93 {
  94     return m_name->text();
  95 }
  96
  97 void FileMetaDataToolTip::setItems(const KFileItemList& items)
  98 {
  99     m_fileMetaDataWidget->setItems(items);
 100 }
 101
 102 KFileItemList FileMetaDataToolTip::items() const
 103 {
 104     return m_fileMetaDataWidget->items();
 105 }
 106
 107 void FileMetaDataToolTip::paintEvent(QPaintEvent* event)
 108 {
 109     Q_UNUSED(event);
 110
 111     QPainter painter(this);
 112
 113     QColor toColor = palette().brush(QPalette::ToolTipBase).color();
 114     QColor fromColor = KColorScheme::shade(toColor, KColorScheme::LightShade, 0.2);
 115
 116     const bool haveAlphaChannel = KWindowSystem::compositingActive();
 117     if (haveAlphaChannel) {
 118         painter.setRenderHint(QPainter::Antialiasing);
 119         painter.translate(0.5, 0.5);
 120         toColor.setAlpha(220);
 121         fromColor.setAlpha(220);
 122     }
 123
 124     QLinearGradient gradient(QPointF(0.0, 0.0), QPointF(0.0, height()));
 125     gradient.setColorAt(0.0, fromColor);
 126     gradient.setColorAt(1.0, toColor);
 127     painter.setPen(Qt::NoPen);
 128     painter.setBrush(gradient);
 129
 130     const QRect rect(0, 0, width(), height());
 131     if (haveAlphaChannel) {
 132         const qreal radius = 5.0;
 133
 134         QPainterPath path;
 135         path.moveTo(rect.left(), rect.top() + radius);
 136         arc(path, rect.left()  + radius, rect.top()    + radius, radius, 180, -90);
 137         arc(path, rect.right() - radius, rect.top()    + radius, radius,  90, -90);
 138         arc(path, rect.right() - radius, rect.bottom() - radius, radius,   0, -90);
 139         arc(path, rect.left()  + radius, rect.bottom() - radius, radius, 270, -90);
 140         path.closeSubpath();
 141
 142         painter.drawPath(path);
 143     } else {
 144         painter.drawRect(rect);
 145     }
 146 }
 147
 148 void FileMetaDataToolTip::arc(QPainterPath& path,
 149                               qreal cx, qreal cy,
 150                               qreal radius, qreal angle,
 151                               qreal sweepLength)
 152 {
 153     path.arcTo(cx-radius, cy-radius, radius * 2, radius * 2, angle, sweepLength);
 154 }
 155
 156 #include "filemetadatatooltip.moc"