src/views/tooltips/filemetadatatooltip.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Peter Penz <peter.penz19@gmail.com>             *
   3  *   Copyright (C) 2008 by Fredrik Höglund <fredrik@kde.org>               *
   4  *   Copyright (C) 2012 by Mark Gaiser <markg85@gmail.com>                 *
   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 program 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         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program; if not, write to the                         *
  18  *   Free Software Foundation, Inc.,                                       *
  19  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  20  ***************************************************************************/
  21
  22 #include "filemetadatatooltip.h"
  23
  24 #include <KColorScheme>
  25 #include <KSeparator>
  26 #include <KWindowSystem>
  27 #include <KStringHandler>
  28
  29 #include <QLabel>
  30 #include <QStyleOptionFrame>
  31 #include <QStylePainter>
  32 #include <QVBoxLayout>
  33 #include <QTextDocument>
  34 #include <QTextLayout>
  35 #include <QTextLine>
  36
  37 #ifndef HAVE_BALOO
  38 #include <KFileMetaDataWidget>
  39 #else
  40 #include <baloo/filemetadatawidget.h>
  41 #endif
  42
  43 // For the blurred tooltip background
  44 #include <plasma/windoweffects.h>
  45
  46 FileMetaDataToolTip::FileMetaDataToolTip(QWidget* parent) :
  47     QWidget(parent),
  48     m_preview(0),
  49     m_name(0),
  50     m_fileMetaDataWidget(0)
  51 {
  52     setAttribute(Qt::WA_TranslucentBackground);
  53     setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
  54
  55     // Create widget for file preview
  56     m_preview = new QLabel(this);
  57     m_preview->setAlignment(Qt::AlignTop);
  58
  59     // Create widget for file name
  60     m_name = new QLabel(this);
  61     m_name->setForegroundRole(QPalette::ToolTipText);
  62     m_name->setTextFormat(Qt::PlainText);
  63     m_name->setAlignment(Qt::AlignHCenter);
  64
  65     QFont font = m_name->font();
  66     font.setBold(true);
  67     m_name->setFont(font);
  68
  69     QFontMetrics fontMetrics(font);
  70     m_name->setMaximumWidth(fontMetrics.averageCharWidth() * 40);
  71
  72     // Create widget for the meta data
  73 #ifndef HAVE_BALOO
  74     m_fileMetaDataWidget = new KFileMetaDataWidget(this);
  75 #else
  76     m_fileMetaDataWidget = new Baloo::FileMetaDataWidget(this);
  77 #endif
  78     m_fileMetaDataWidget->setForegroundRole(QPalette::ToolTipText);
  79     m_fileMetaDataWidget->setReadOnly(true);
  80     connect(m_fileMetaDataWidget, SIGNAL(metaDataRequestFinished(KFileItemList)),
  81             this, SIGNAL(metaDataRequestFinished(KFileItemList)));
  82
  83     QVBoxLayout* textLayout = new QVBoxLayout();
  84     textLayout->addWidget(m_name);
  85     textLayout->addWidget(new KSeparator());
  86     textLayout->addWidget(m_fileMetaDataWidget);
  87     textLayout->setAlignment(m_name, Qt::AlignCenter);
  88     textLayout->setAlignment(m_fileMetaDataWidget, Qt::AlignLeft);
  89     // Assure that the text-layout gets top-aligned by adding a stretch.
  90     // Don't use textLayout->setAlignment(Qt::AlignTop) instead, as this does
  91     // not work with the heightForWidth()-size-hint of m_fileMetaDataWidget
  92     // (see bug #241608)
  93     textLayout->addStretch();
  94
  95     QHBoxLayout* tipLayout = new QHBoxLayout(this);
  96     tipLayout->addWidget(m_preview);
  97     tipLayout->addSpacing(tipLayout->margin());
  98     tipLayout->addLayout(textLayout);
  99 }
 100
 101 FileMetaDataToolTip::~FileMetaDataToolTip()
 102 {
 103 }
 104
 105 void FileMetaDataToolTip::setPreview(const QPixmap& pixmap)
 106 {
 107     m_preview->setPixmap(pixmap);
 108 }
 109
 110 QPixmap FileMetaDataToolTip::preview() const
 111 {
 112     if (m_preview->pixmap()) {
 113         return *m_preview->pixmap();
 114     }
 115     return QPixmap();
 116 }
 117
 118 void FileMetaDataToolTip::setName(const QString& name)
 119 {
 120     QTextOption textOption;
 121     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 122
 123     const QString processedName = Qt::mightBeRichText(name) ? name : KStringHandler::preProcessWrap(name);
 124
 125     QTextLayout textLayout(processedName);
 126     textLayout.setFont(m_name->font());
 127     textLayout.setTextOption(textOption);
 128
 129     QString wrappedText;
 130     wrappedText.reserve(processedName.length());
 131
 132     // wrap the text to fit into the maximum width of m_name
 133     textLayout.beginLayout();
 134     QTextLine line = textLayout.createLine();
 135     while (line.isValid()) {
 136         line.setLineWidth(m_name->maximumWidth());
 137         wrappedText += processedName.mid(line.textStart(), line.textLength());
 138
 139         line = textLayout.createLine();
 140         if (line.isValid()) {
 141             wrappedText += QChar::LineSeparator;
 142         }
 143     }
 144     textLayout.endLayout();
 145
 146     m_name->setText(wrappedText);
 147 }
 148
 149 QString FileMetaDataToolTip::name() const
 150 {
 151     return m_name->text();
 152 }
 153
 154 void FileMetaDataToolTip::setItems(const KFileItemList& items)
 155 {
 156     m_fileMetaDataWidget->setItems(items);
 157 }
 158
 159 KFileItemList FileMetaDataToolTip::items() const
 160 {
 161     return m_fileMetaDataWidget->items();
 162 }
 163
 164 void FileMetaDataToolTip::paintEvent(QPaintEvent* event)
 165 {
 166     QStylePainter painter(this);
 167     QStyleOptionFrame option;
 168     option.init(this);
 169     painter.drawPrimitive(QStyle::PE_PanelTipLabel, option);
 170     painter.end();
 171
 172     QWidget::paintEvent(event);
 173 }
 174
 175 void FileMetaDataToolTip::showEvent(QShowEvent *)
 176 {
 177     Plasma::WindowEffects::overrideShadow(winId(), true);
 178     Plasma::WindowEffects::enableBlurBehind(winId(), true, mask());
 179 }
 180
 181 #include "filemetadatatooltip.moc"