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 // For the blurred tooltip background
  28 #include <KWindowEffects>
  29 #include <KStringHandler>
  30
  31 #include <QLabel>
  32 #include <QStyleOptionFrame>
  33 #include <QStylePainter>
  34 #include <QVBoxLayout>
  35 #include <QTextDocument>
  36 #include <QTextLayout>
  37 #include <QTextLine>
  38
  39 #ifndef HAVE_BALOO
  40 #include <KFileMetaDataWidget>
  41 #else
  42 #include <Baloo/FileMetaDataWidget>
  43 #endif
  44
  45 FileMetaDataToolTip::FileMetaDataToolTip(QWidget* parent) :
  46     QWidget(parent),
  47     m_preview(0),
  48     m_name(0),
  49     m_fileMetaDataWidget(0)
  50 {
  51     setAttribute(Qt::WA_TranslucentBackground);
  52     setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint);
  53
  54     // Create widget for file preview
  55     m_preview = new QLabel(this);
  56     m_preview->setAlignment(Qt::AlignTop);
  57
  58     // Create widget for file name
  59     m_name = new QLabel(this);
  60     m_name->setForegroundRole(QPalette::ToolTipText);
  61     m_name->setTextFormat(Qt::PlainText);
  62     m_name->setAlignment(Qt::AlignHCenter);
  63
  64     QFont font = m_name->font();
  65     font.setBold(true);
  66     m_name->setFont(font);
  67
  68     QFontMetrics fontMetrics(font);
  69     m_name->setMaximumWidth(fontMetrics.averageCharWidth() * 40);
  70
  71     // Create widget for the meta data
  72 #ifndef HAVE_BALOO
  73     m_fileMetaDataWidget = new KFileMetaDataWidget(this);
  74     connect(m_fileMetaDataWidget, &KFileMetaDataWidget::metaDataRequestFinished,
  75             this, &FileMetaDataToolTip::metaDataRequestFinished);
  76 #else
  77     m_fileMetaDataWidget = new Baloo::FileMetaDataWidget(this);
  78     connect(m_fileMetaDataWidget, &Baloo::FileMetaDataWidget::metaDataRequestFinished,
  79             this, &FileMetaDataToolTip::metaDataRequestFinished);
  80 #endif
  81     m_fileMetaDataWidget->setForegroundRole(QPalette::ToolTipText);
  82     m_fileMetaDataWidget->setReadOnly(true);
  83
  84     QVBoxLayout* textLayout = new QVBoxLayout();
  85     textLayout->addWidget(m_name);
  86     textLayout->addWidget(new KSeparator());
  87     textLayout->addWidget(m_fileMetaDataWidget);
  88     textLayout->setAlignment(m_name, Qt::AlignCenter);
  89     textLayout->setAlignment(m_fileMetaDataWidget, Qt::AlignLeft);
  90     // Assure that the text-layout gets top-aligned by adding a stretch.
  91     // Don't use textLayout->setAlignment(Qt::AlignTop) instead, as this does
  92     // not work with the heightForWidth()-size-hint of m_fileMetaDataWidget
  93     // (see bug #241608)
  94     textLayout->addStretch();
  95
  96     QHBoxLayout* tipLayout = new QHBoxLayout(this);
  97     tipLayout->addWidget(m_preview);
  98     tipLayout->addSpacing(tipLayout->margin());
  99     tipLayout->addLayout(textLayout);
 100 }
 101
 102 FileMetaDataToolTip::~FileMetaDataToolTip()
 103 {
 104 }
 105
 106 void FileMetaDataToolTip::setPreview(const QPixmap& pixmap)
 107 {
 108     m_preview->setPixmap(pixmap);
 109 }
 110
 111 QPixmap FileMetaDataToolTip::preview() const
 112 {
 113     if (m_preview->pixmap()) {
 114         return *m_preview->pixmap();
 115     }
 116     return QPixmap();
 117 }
 118
 119 void FileMetaDataToolTip::setName(const QString& name)
 120 {
 121     QTextOption textOption;
 122     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 123
 124     const QString processedName = Qt::mightBeRichText(name) ? name : KStringHandler::preProcessWrap(name);
 125
 126     QTextLayout textLayout(processedName);
 127     textLayout.setFont(m_name->font());
 128     textLayout.setTextOption(textOption);
 129
 130     QString wrappedText;
 131     wrappedText.reserve(processedName.length());
 132
 133     // wrap the text to fit into the maximum width of m_name
 134     textLayout.beginLayout();
 135     QTextLine line = textLayout.createLine();
 136     while (line.isValid()) {
 137         line.setLineWidth(m_name->maximumWidth());
 138         wrappedText += processedName.mid(line.textStart(), line.textLength());
 139
 140         line = textLayout.createLine();
 141         if (line.isValid()) {
 142             wrappedText += QChar::LineSeparator;
 143         }
 144     }
 145     textLayout.endLayout();
 146
 147     m_name->setText(wrappedText);
 148 }
 149
 150 QString FileMetaDataToolTip::name() const
 151 {
 152     return m_name->text();
 153 }
 154
 155 void FileMetaDataToolTip::setItems(const KFileItemList& items)
 156 {
 157     m_fileMetaDataWidget->setItems(items);
 158 }
 159
 160 KFileItemList FileMetaDataToolTip::items() const
 161 {
 162     return m_fileMetaDataWidget->items();
 163 }
 164
 165 void FileMetaDataToolTip::paintEvent(QPaintEvent* event)
 166 {
 167     QStylePainter painter(this);
 168     QStyleOptionFrame option;
 169     option.init(this);
 170     painter.drawPrimitive(QStyle::PE_PanelTipLabel, option);
 171     painter.end();
 172
 173     QWidget::paintEvent(event);
 174 }
 175
 176 void FileMetaDataToolTip::showEvent(QShowEvent *)
 177 {
 178 #pragma message("TODO: port Plasma::WindowEffects::overrideShadow")
 179     //Plasma::WindowEffects::overrideShadow(winId(), true);
 180     KWindowEffects::enableBlurBehind(winId(), true, mask());
 181 }
 182